From 31445510e2ad0ca4744e6330bdfa8ec140f2229c Mon Sep 17 00:00:00 2001
From: Li Junchen <lijunchen95@outlook.com>
Date: Tue, 23 Jul 2024 18:40:39 +0800
Subject: [PATCH] open source

moon was originally developed starting in May 2023 at the International Digital
Economy Academy. This commit cleans up the history and squashes it into one
commit in preparation for open-sourcing.

Co-authored-by: Rynco Maekawa <i@rynco.me>
Co-authored-by: Young-Flash <dongyang@apache.org>
---
 .cargo/config.toml                            |    2 +
 .github/workflows/cd.yml                      |  121 +
 .github/workflows/check-merge-commit.yml      |   35 +
 .github/workflows/ci.yml                      |  246 +
 .github/workflows/test-on-main.yml            |  134 +
 .gitignore                                    |    4 +
 Cargo.lock                                    | 2761 +++++++++
 Cargo.toml                                    |   93 +
 README.md                                     |   54 +
 crates/moon/Cargo.toml                        |   46 +
 crates/moon/src/cli.rs                        |  219 +
 crates/moon/src/cli/build.rs                  |  143 +
 crates/moon/src/cli/build_matrix.rs           |   56 +
 crates/moon/src/cli/bundle.rs                 |  138 +
 crates/moon/src/cli/check.rs                  |  170 +
 crates/moon/src/cli/clean.rs                  |   28 +
 crates/moon/src/cli/coverage.rs               |  103 +
 crates/moon/src/cli/deps.rs                   |  120 +
 crates/moon/src/cli/doc.rs                    |  107 +
 crates/moon/src/cli/fmt.rs                    |   61 +
 crates/moon/src/cli/generate_test_driver.rs   |  283 +
 crates/moon/src/cli/info.rs                   |  133 +
 crates/moon/src/cli/mooncake_adapter.rs       |   73 +
 crates/moon/src/cli/new.rs                    |  167 +
 crates/moon/src/cli/run.rs                    |  240 +
 crates/moon/src/cli/test.rs                   |  351 ++
 crates/moon/src/cli/update.rs                 |   17 +
 crates/moon/src/cli/upgrade.rs                |   10 +
 crates/moon/src/cli/version.rs                |  145 +
 crates/moon/src/main.rs                       |   71 +
 crates/moon/tests/mod.rs                      |  202 +
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 docs/dev/README.md                            |  170 +
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 xtask/Cargo.toml                              |   12 +
 xtask/src/main.rs                             |   47 +
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 create mode 100644 crates/moonbuild/src/gen/gen_runtest.rs
 create mode 100644 crates/moonbuild/src/gen/mod.rs
 create mode 100644 crates/moonbuild/src/gen/util.rs
 create mode 100644 crates/moonbuild/src/lib.rs
 create mode 100644 crates/moonbuild/src/new.rs
 create mode 100644 crates/moonbuild/src/runtest.rs
 create mode 100644 crates/moonbuild/src/section_capture.rs
 create mode 100644 crates/moonbuild/src/upgrade.rs
 create mode 100644 crates/moonbuild/template/apache-2.0.txt
 create mode 100644 crates/moonbuild/template/test_driver_template.mbt
 create mode 100644 crates/mooncake/Cargo.toml
 create mode 100644 crates/mooncake/src/dep_dir.rs
 create mode 100644 crates/mooncake/src/lib.rs
 create mode 100644 crates/mooncake/src/pkg/add.rs
 create mode 100644 crates/mooncake/src/pkg/install.rs
 create mode 100644 crates/mooncake/src/pkg/mod.rs
 create mode 100644 crates/mooncake/src/pkg/remove.rs
 create mode 100644 crates/mooncake/src/pkg/sync.rs
 create mode 100644 crates/mooncake/src/pkg/tree.rs
 create mode 100644 crates/mooncake/src/registry.rs
 create mode 100644 crates/mooncake/src/registry/mock.rs
 create mode 100644 crates/mooncake/src/registry/online.rs
 create mode 100644 crates/mooncake/src/resolver.rs
 create mode 100644 crates/mooncake/src/resolver/env.rs
 create mode 100644 crates/mooncake/src/resolver/mvs.rs
 create mode 100644 crates/mooncake/src/update.rs
 create mode 100644 crates/moonutil/Cargo.toml
 create mode 100644 crates/moonutil/build.rs
 create mode 100644 crates/moonutil/src/cli.rs
 create mode 100644 crates/moonutil/src/common.rs
 create mode 100644 crates/moonutil/src/dependency.rs
 create mode 100644 crates/moonutil/src/dirs.rs
 create mode 100644 crates/moonutil/src/graph.rs
 create mode 100644 crates/moonutil/src/lib.rs
 create mode 100644 crates/moonutil/src/module.rs
 create mode 100644 crates/moonutil/src/moon_dir.rs
 create mode 100644 crates/moonutil/src/mooncake_bin.rs
 create mode 100644 crates/moonutil/src/mooncakes.rs
 create mode 100644 crates/moonutil/src/package.rs
 create mode 100644 crates/moonutil/src/path.rs
 create mode 100644 crates/moonutil/src/render.rs
 create mode 100644 crates/moonutil/src/scan.rs
 create mode 100644 crates/moonutil/src/version.rs
 create mode 100644 docs/dev/README.md
 create mode 100644 licenserc.toml
 create mode 100644 xtask/Cargo.toml
 create mode 100644 xtask/src/main.rs

diff --git a/.cargo/config.toml b/.cargo/config.toml
new file mode 100644
index 00000000..35049cbc
--- /dev/null
+++ b/.cargo/config.toml
@@ -0,0 +1,2 @@
+[alias]
+xtask = "run --package xtask --"
diff --git a/.github/workflows/cd.yml b/.github/workflows/cd.yml
new file mode 100644
index 00000000..1c7ab7ad
--- /dev/null
+++ b/.github/workflows/cd.yml
@@ -0,0 +1,121 @@
+name: CD
+
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - main
+
+jobs:
+  build:
+    strategy:
+      matrix:
+        os: [macos-latest, macos-13, windows-latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@1.77.0
+      - name: Cargo cache
+        uses: actions/cache@v4
+        with:
+          key: ${{ runner.os }}-cargo-${{ hashFiles('Cargo.lock') }}
+          path: ~/.cargo/registry
+      - name: Build
+        run: cargo build --release
+
+      - name: Setup Rclone
+        uses: AnimMouse/setup-rclone@v1
+        with:
+          rclone_config: ${{ secrets.RCLONE_CONFIG }}
+
+      - name: Upload(Unix)
+        if: ${{ matrix.os != 'windows-latest' }}
+        run: |
+          version=$(echo "$GITHUB_SHA" | cut -c 1-9)
+          rclone copy target/release/moon "aws:${{ secrets.AWS_BUCKET_NAME }}/bleeding-moon/$version/$(uname -s)-$(uname -m)/"
+          mkdir tmp && cp target/release/moon tmp/moon
+          rclone copy tmp/ "aliyun:${{ secrets.ALIYUN_BUCKET_NAME }}/bleeding-moon/$version/$(uname -s)-$(uname -m)/"
+
+      - name: Upload(Windows)
+        if: ${{ matrix.os == 'windows-latest' }}
+        run: |
+          $version = "$env:GITHUB_SHA".Substring(0, 9)
+          rclone copyto -L .\target\release\moon.exe "aws:${{ secrets.AWS_BUCKET_NAME }}/bleeding-moon/$version/Windows-x86_64/moon.exe"
+
+      - name: Checkout moonc-version (macos-latest)
+        if: ${{ matrix.os == 'macos-latest' }}
+        uses: actions/checkout@v4
+        with:
+          ref: moonc-version-dont-delete
+          path: moonc-version-dont-delete
+
+      - name: Copy moonc-version file to workspace (macos-latest)
+        if: ${{ matrix.os == 'macos-latest' }}
+        run: |
+          cp moonc-version-dont-delete/moonc-version .
+
+      - name: Bleeding Release (macos-latest)
+        if: ${{ matrix.os == 'macos-latest' }}
+        env:
+          AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}
+          AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
+          AWS_DEFAULT_REGION: ${{ secrets.AWS_DEFAULT_REGION }}
+        run: |
+          rm -rf tmp-bins
+          mkdir tmp-bins
+          mooncVersion=$(cat moonc-version | cut -c 1-9)
+          rclone copy "aws:${{ secrets.AWS_BUCKET_NAME }}/bleeding-moonc/$mooncVersion/$(uname -s)-$(uname -m)/" ./tmp-bins/
+          moonrunVersion=4bb74ba5f
+          rclone copy "aws:${{ secrets.AWS_BUCKET_NAME }}/bleeding-moonrun/$moonrunVersion/$(uname -s)-$(uname -m)/moonrun" ./tmp-bins/
+          cp -L ./target/release/moon ./tmp-bins/
+          pushd tmp-bins && shasum -a 256 -- * >../moonbit-darwin-aarch64.sha256 && popd
+          tar czf ./moonbit-darwin-aarch64.tar.gz --directory=./tmp-bins .
+          aws s3 cp ./moonbit-darwin-aarch64.tar.gz s3://cli.moonbitlang.com/binaries/bleeding/moonbit-darwin-aarch64.tar.gz
+          aws s3 cp ./moonbit-darwin-aarch64.sha256 s3://cli.moonbitlang.com/binaries/bleeding/moonbit-darwin-aarch64.sha256
+          aws cloudfront create-invalidation --distribution-id E1KQYZEVEB0TAY --paths "/*"
+
+  ubuntu-build:
+    runs-on: ubuntu-latest
+    container:
+      image: ubuntu:16.04
+    steps:
+      - name: Install dependencies
+        run: |
+          apt update && apt install -y software-properties-common curl unzip build-essential git
+
+      - name: Checkout
+        run: |
+          git clone --depth 1 "https://${{ secrets.MOON_CLONE_PAT }}@github.com/moonbitlang/moon.git" "$GITHUB_WORKSPACE"
+
+      - name: Install Rust
+        run: |
+          curl --proto '=https' --tlsv1.2 -sSf "https://sh.rustup.rs" | sh -s -- -y
+          echo ~/.cargo/bin >> $GITHUB_PATH
+
+      - name: Rust Version
+        run: |
+          cargo version
+          rustc --version
+
+      - run: |
+          git config --global --add safe.directory "$(pwd)"
+          git status
+
+      - name: Build
+        run: cargo build --release
+
+      - name: Setup Rclone
+        env:
+          RCLONE_CONFIG_PLAIN: ${{ secrets.RCLONE_CONFIG_PLAIN }}
+        run: |
+          curl https://rclone.org/install.sh | bash
+          mkdir -p ~/.config/rclone
+          echo "$RCLONE_CONFIG_PLAIN" > ~/.config/rclone/rclone.conf
+
+      - name: Upload
+        run: |
+          version="$(echo "$GITHUB_SHA" | cut -c 1-9)"
+          echo "$version"
+          rclone copy target/release/moon "aws:${{ secrets.AWS_BUCKET_NAME }}/bleeding-moon/$version/$(uname -s)-$(uname -m)/"
+          mkdir tmp && cp target/release/moon tmp/moon
+          rclone copy tmp/ "aliyun:${{ secrets.ALIYUN_BUCKET_NAME }}/bleeding-moon/$version/$(uname -s)-$(uname -m)/"
diff --git a/.github/workflows/check-merge-commit.yml b/.github/workflows/check-merge-commit.yml
new file mode 100644
index 00000000..061148a2
--- /dev/null
+++ b/.github/workflows/check-merge-commit.yml
@@ -0,0 +1,35 @@
+name: Check for Merge Commits
+
+on:
+  pull_request:
+    branches: main
+
+jobs:
+  check-merge-commit:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Check out the repository
+      uses: actions/checkout@v4
+  
+    - name: Get all commit messages
+      id: get-commit-messages
+      uses: actions/github-script@v7
+      with:
+        script: |
+          const prNumber = context.payload.pull_request.number;
+          const commits = await github.rest.pulls.listCommits({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              pull_number: prNumber,
+              per_page: 100
+          });
+          const commitMessages = commits.data.map(commit => commit.commit.message);
+          const hasMergeCommit = commitMessages.some(message => message.startsWith('Merge branch') || message.startsWith('Merge pull request'));
+          if (hasMergeCommit) {
+              core.setFailed('Pull request contains merge commit(s).');
+          }
+
+    - name: Check for merge commits
+      if: failure()
+      run: echo "This pull request contains merge commit(s) and has been marked as failed."
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 00000000..20aa0283
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,246 @@
+name: CI
+
+on:
+  push:
+    branches: main
+  pull_request:
+    branches: main
+
+env:
+  CARGO_TERM_COLOR: always
+  RUST_BACKTRACE: 0
+  CARGO_TARPAULIN_VERSION: 0.30.0
+
+jobs:
+  CCAA-check:
+    runs-on: ubuntu-latest
+    if: github.event_name == 'pull_request'
+    outputs:
+        CCAA-signed: ${{ steps.CCAA-check-step.outputs.CCAA-signed }}
+    steps:
+    - uses: actions/checkout@v4
+    - name: CCAA check
+      id: CCAA-check-step
+      env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      run: |
+          PR_AUTHOR=$(curl -s -H "Authorization: token $GITHUB_TOKEN" \
+          https://api.github.com/repos/${{ github.repository }}/pulls/${{ github.event.number }} \
+          | jq -r '.user.login')
+          echo "The PR author is $PR_AUTHOR"
+          EMAIL=$(git log -1 --pretty=format:'%ae')
+          echo "Commit author email: $EMAIL"
+          CCAA_RESPONSE=$(curl -s "https://mooncakes.io/api/v0/cla/check_with_repo?gh_username=$PR_AUTHOR&repo=moon&email=$EMAIL")
+          echo "CCAA check response: $CCAA_RESPONSE"
+          SIGNED=$(echo $CCAA_RESPONSE | jq -r '.signed')
+          echo "CCAA-signed=$SIGNED" >> $GITHUB_ENV
+          echo "If you have any questions about the CCAA result, please contact us."
+          if [ "$SIGNED" != "true" ]; then
+            echo "CCAA is not signed. Please read the document at https://github.com/moonbitlang/moon/tree/main/docs/dev"
+            exit 1
+          else
+            echo "CCAA is signed."
+          fi
+
+  license-header-check:
+    name: license header check
+    runs-on: ubuntu-latest
+    env:
+      HAWKEYE_VERSION: v5.6.0
+    steps:
+      - uses: actions/checkout@v4
+      - name: Download HawkEye
+        run: curl --proto '=https' --tlsv1.2 -LsSf https://github.com/korandoru/hawkeye/releases/download/$HAWKEYE_VERSION/hawkeye-installer.sh | sh
+      - name: License Header Check
+        run: hawkeye check
+
+  typo-check:
+    name: typo-check
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    env:
+      FORCE_COLOR: 1
+      TYPOS_VERSION: v1.18.0
+    steps:
+      - name: download typos
+        run: curl -LsSf https://github.com/crate-ci/typos/releases/download/$TYPOS_VERSION/typos-$TYPOS_VERSION-x86_64-unknown-linux-musl.tar.gz | tar zxf - -C ${CARGO_HOME:-~/.cargo}/bin
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event.pull_request.head.sha }}
+      - name: check for typos
+        run: typos
+
+  code-style:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@1.77.0
+        with:
+          components: rustfmt, clippy
+      - name: Check formatting
+        run: cargo fmt -- --check
+      - name: Clippy
+        run: cargo clippy --all-targets --all-features -- -D warnings
+
+  test:
+    needs: [code-style, typo-check, license-header-check]
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - ubuntu-latest
+          #   - macos-latest
+          #   - macos-13
+          - windows-latest
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Checkout moonc-version
+        uses: actions/checkout@v4
+        with:
+          ref: moonc-version-dont-delete
+          path: moonc-version-dont-delete
+      - name: Copy moonc-version file to workspace
+        run: |
+          cp moonc-version-dont-delete/moonc-version .
+
+      - uses: dtolnay/rust-toolchain@1.77.0
+      - name: Cargo cache
+        uses: actions/cache@v4
+        with:
+          key: ${{ runner.os }}-cargo-${{ hashFiles('Cargo.lock') }}
+          path: ~/.cargo/registry
+
+      - name: Setup Rclone
+        uses: AnimMouse/setup-rclone@v1
+        with:
+          rclone_config: ${{ secrets.RCLONE_CONFIG }}
+
+      - name: install MoonBit(Unix)
+        if: ${{ matrix.os != 'windows-latest' }}
+        run: |
+          mkdir -p ~/.moon/bin
+          mkdir -p ~/.moon/lib
+          git clone --depth 1 https://github.com/moonbitlang/core.git ~/.moon/lib/core
+          mooncVersion=$(cat moonc-version | cut -c 1-9)
+          echo "$mooncVersion"
+          bins=('moonc' 'mooninfo' 'moonfmt')
+          for bin in "${bins[@]}"; do
+              rclone copy "aws:${{ secrets.AWS_BUCKET_NAME }}/bleeding-moonc/$mooncVersion/$(uname -s)-$(uname -m)/$bin" ~/.moon/bin/
+              chmod +x ~/.moon/bin/"$bin"
+          done
+          moonrunVersion=4bb74ba5f
+          rclone copy "aws:${{ secrets.AWS_BUCKET_NAME }}/bleeding-moonrun/$moonrunVersion/$(uname -s)-$(uname -m)/moonrun" ~/.moon/bin/
+          chmod +x ~/.moon/bin/moonrun
+          echo "$HOME/.moon/bin" >> $GITHUB_PATH
+
+      - name: install MoonBit(Windows)
+        if: ${{ matrix.os == 'windows-latest' }}
+        run: |
+          New-Item -Path "$env:USERPROFILE" -Name ".moon" -ItemType "directory"
+          New-Item -Path "$env:USERPROFILE\.moon" -Name "lib" -ItemType "directory"
+          New-Item -Path "$env:USERPROFILE\.moon" -Name "bin" -ItemType "directory"
+          $mooncVersion = (Get-Content moonc-version -First 1).Substring(0, 9)
+          $bins = @("moonc.exe", "mooninfo.exe", "moonfmt.exe")
+          foreach ($bin in $bins) {
+              rclone copy "aws:${{ secrets.AWS_BUCKET_NAME }}/bleeding-moonc/$mooncVersion/Windows-x86_64/$bin" "$env:USERPROFILE\.moon\bin\"
+          }
+          $moonrunVersion = "4bb74ba5f"
+          rclone copy "aws:${{ secrets.AWS_BUCKET_NAME }}/bleeding-moonrun/$moonrunVersion/Windows-x86_64/moonrun.exe" "$env:USERPROFILE\.moon\bin\"
+          git clone --depth 1 https://github.com/moonbitlang/core.git "$env:USERPROFILE\.moon\lib\core"
+          "$env:USERPROFILE\.moon\bin" | Out-File -FilePath $env:GITHUB_PATH -Append
+
+      - name: Build
+        run: cargo build
+      - name: Versions
+        run: cargo run --bin moon version --all
+      - name: Bundle core (Unix)
+        if: ${{ matrix.os != 'windows-latest' }}
+        run: cargo run --bin moon bundle --source-dir ~/.moon/lib/core --all
+      - name: Bundle core (Windows)
+        if: ${{ matrix.os == 'windows-latest' }}
+        run: cargo run --bin moon bundle --source-dir "$env:USERPROFILE\.moon\lib\core" --all
+
+      - name: Test core (Unix)
+        if: ${{ matrix.os != 'windows-latest' }}
+        run: |
+          cargo run --bin moon test --source-dir ~/.moon/lib/core --target wasm-gc
+          cargo run --bin moon test --source-dir ~/.moon/lib/core --target js
+          cargo run --bin moon test --source-dir ~/.moon/lib/core --target wasm
+          cargo run --bin moon test --source-dir ~/.moon/lib/core --release --target wasm-gc
+          cargo run --bin moon test --source-dir ~/.moon/lib/core --release --target js
+          cargo run --bin moon test --source-dir ~/.moon/lib/core --release --target wasm
+      - name: Test core (Windows)
+        if: ${{ matrix.os == 'windows-latest' }}
+        run: |
+          cargo run --bin moon test --source-dir "$env:USERPROFILE\.moon\lib\core" --target wasm-gc
+          cargo run --bin moon test --source-dir "$env:USERPROFILE\.moon\lib\core" --target js
+          cargo run --bin moon test --source-dir "$env:USERPROFILE\.moon\lib\core" --target wasm
+          cargo run --bin moon test --source-dir "$env:USERPROFILE\.moon\lib\core" --release --target wasm-gc
+          cargo run --bin moon test --source-dir "$env:USERPROFILE\.moon\lib\core" --release --target js
+          cargo run --bin moon test --source-dir "$env:USERPROFILE\.moon\lib\core" --release --target wasm
+
+      - name: Run tests
+        run: cargo test
+
+  coverage:
+    needs: test
+    runs-on: macos-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@1.77.0
+
+      - name: Checkout moonc-version
+        uses: actions/checkout@v4
+        with:
+          ref: moonc-version-dont-delete
+          path: moonc-version-dont-delete
+      - name: Copy moonc-version file to workspace
+        run: |
+          cp moonc-version-dont-delete/moonc-version .
+
+      - name: Setup Rclone
+        uses: AnimMouse/setup-rclone@v1
+        with:
+          rclone_config: ${{ secrets.RCLONE_CONFIG }}
+
+      - name: install MoonBit(Unix)
+        run: |
+          mkdir -p ~/.moon/bin
+          mkdir -p ~/.moon/lib
+          git clone --depth 1 https://github.com/moonbitlang/core.git ~/.moon/lib/core
+          mooncVersion=$(cat moonc-version | cut -c 1-9)
+          echo "$mooncVersion"
+          bins=('moonc' 'mooninfo' 'moonfmt')
+          for bin in "${bins[@]}"; do
+              rclone copy "aws:${{ secrets.AWS_BUCKET_NAME }}/bleeding-moonc/$mooncVersion/$(uname -s)-$(uname -m)/$bin" ~/.moon/bin/
+              chmod +x ~/.moon/bin/"$bin"
+          done
+          moonrunVersion=4bb74ba5f
+          rclone copy "aws:${{ secrets.AWS_BUCKET_NAME }}/bleeding-moonrun/$moonrunVersion/$(uname -s)-$(uname -m)/moonrun" ~/.moon/bin/
+          chmod +x ~/.moon/bin/moonrun
+          echo "$HOME/.moon/bin" >> $GITHUB_PATH
+
+      - name: install cargo-tarpaulin ${{ env.CARGO_TARPAULIN_VERSION }}
+        run: |
+          cd "${CARGO_HOME}/bin"
+          curl -sL https://github.com/xd009642/tarpaulin/releases/download/${CARGO_TARPAULIN_VERSION}/cargo-tarpaulin-aarch64-apple-darwin.tar.gz | tar zxf - -C ${CARGO_HOME:-~/.cargo}/bin
+
+      - name: Build
+        run: cargo build
+      - name: Versions
+        run: cargo run --bin moon version --all
+      - name: Bundle core (Unix)
+        run: cargo run --bin moon bundle --source-dir ~/.moon/lib/core --all
+
+      - name: Generate code coverage
+        run: cargo tarpaulin --ignore-tests --out Xml
+
+      - name: Upload coverage reports to Codecov
+        uses: codecov/codecov-action@v4.0.1
+        with:
+          token: ${{secrets.CODECOV_TOKEN}}
+          fail_ci_if_error: true
diff --git a/.github/workflows/test-on-main.yml b/.github/workflows/test-on-main.yml
new file mode 100644
index 00000000..0317f6fa
--- /dev/null
+++ b/.github/workflows/test-on-main.yml
@@ -0,0 +1,134 @@
+name: Test on main
+
+on:
+  workflow_dispatch:
+
+jobs:
+  test:
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - ubuntu-latest
+          #   - macos-latest
+          #   - macos-13
+          - windows-latest
+    runs-on: ${{ matrix.os }}
+    env:
+      WECOM_ROBOT_KEY: ${{ secrets.WECOM_ROBOT_KEY }}
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Checkout moonc-version
+        uses: actions/checkout@v4
+        with:
+          ref: moonc-version-dont-delete
+          path: moonc-version-dont-delete
+      - name: Copy moonc-version file to workspace
+        run: |
+          cp moonc-version-dont-delete/moonc-version .
+
+      - uses: dtolnay/rust-toolchain@1.77.0
+      - name: Cargo cache
+        uses: actions/cache@v4
+        with:
+          key: ${{ runner.os }}-cargo-${{ hashFiles('Cargo.lock') }}
+          path: ~/.cargo/registry
+
+      - name: Setup Rclone
+        uses: AnimMouse/setup-rclone@v1
+        with:
+          rclone_config: ${{ secrets.RCLONE_CONFIG }}
+
+      - name: install MoonBit(Unix)
+        if: ${{ matrix.os != 'windows-latest' }}
+        run: |
+          mkdir -p ~/.moon/bin
+          mkdir -p ~/.moon/lib
+          git clone --depth 1 https://github.com/moonbitlang/core.git ~/.moon/lib/core
+          mooncVersion=$(cat moonc-version | cut -c 1-9)
+          echo "$mooncVersion"
+          bins=('moonc' 'mooninfo' 'moonfmt')
+          for bin in "${bins[@]}"; do
+              rclone copy "aws:${{ secrets.AWS_BUCKET_NAME }}/bleeding-moonc/$mooncVersion/$(uname -s)-$(uname -m)/$bin" ~/.moon/bin/
+              chmod +x ~/.moon/bin/"$bin"
+          done
+          moonrunVersion=4bb74ba5f
+          rclone copy "aws:${{ secrets.AWS_BUCKET_NAME }}/bleeding-moonrun/$moonrunVersion/$(uname -s)-$(uname -m)/moonrun" ~/.moon/bin/
+          chmod +x ~/.moon/bin/moonrun
+          echo "$HOME/.moon/bin" >> $GITHUB_PATH
+
+      - name: install MoonBit(Windows)
+        if: ${{ matrix.os == 'windows-latest' }}
+        run: |
+          New-Item -Path "$env:USERPROFILE" -Name ".moon" -ItemType "directory"
+          New-Item -Path "$env:USERPROFILE\.moon" -Name "lib" -ItemType "directory"
+          New-Item -Path "$env:USERPROFILE\.moon" -Name "bin" -ItemType "directory"
+          $mooncVersion = (Get-Content moonc-version -First 1).Substring(0, 9)
+          $bins = @("moonc.exe", "mooninfo.exe", "moonfmt.exe")
+          foreach ($bin in $bins) {
+              rclone copy "aws:${{ secrets.AWS_BUCKET_NAME }}/bleeding-moonc/$mooncVersion/Windows-x86_64/$bin" "$env:USERPROFILE\.moon\bin\"
+          }
+          $moonrunVersion = "4bb74ba5f"
+          rclone copy "aws:${{ secrets.AWS_BUCKET_NAME }}/bleeding-moonrun/$moonrunVersion/Windows-x86_64/moonrun.exe" "$env:USERPROFILE\.moon\bin\"
+          git clone --depth 1 https://github.com/moonbitlang/core.git "$env:USERPROFILE\.moon\lib\core"
+          "$env:USERPROFILE\.moon\bin" | Out-File -FilePath $env:GITHUB_PATH -Append
+
+      - name: Build
+        run: cargo build
+      - name: Versions
+        run: cargo run --bin moon version --all
+      - name: Bundle core (Unix)
+        if: ${{ matrix.os != 'windows-latest' }}
+        run: cargo run --bin moon bundle --source-dir ~/.moon/lib/core --all
+      - name: Bundle core (Windows)
+        if: ${{ matrix.os == 'windows-latest' }}
+        run: cargo run --bin moon bundle --source-dir "$env:USERPROFILE\.moon\lib\core" --all
+
+      - name: Test core (Unix)
+        if: ${{ matrix.os != 'windows-latest' }}
+        run: |
+          cargo run --bin moon test --source-dir ~/.moon/lib/core --target wasm-gc
+          cargo run --bin moon test --source-dir ~/.moon/lib/core --target js
+          cargo run --bin moon test --source-dir ~/.moon/lib/core --target wasm
+          cargo run --bin moon test --source-dir ~/.moon/lib/core --release --target wasm-gc
+          cargo run --bin moon test --source-dir ~/.moon/lib/core --release --target js
+          cargo run --bin moon test --source-dir ~/.moon/lib/core --release --target wasm
+      - name: Test core (Windows)
+        if: ${{ matrix.os == 'windows-latest' }}
+        run: |
+          cargo run --bin moon test --source-dir "$env:USERPROFILE\.moon\lib\core" --target wasm-gc
+          cargo run --bin moon test --source-dir "$env:USERPROFILE\.moon\lib\core" --target js
+          cargo run --bin moon test --source-dir "$env:USERPROFILE\.moon\lib\core" --target wasm
+          cargo run --bin moon test --source-dir "$env:USERPROFILE\.moon\lib\core" --release --target wasm-gc
+          cargo run --bin moon test --source-dir "$env:USERPROFILE\.moon\lib\core" --release --target js
+          cargo run --bin moon test --source-dir "$env:USERPROFILE\.moon\lib\core" --release --target wasm
+
+      - name: Run tests
+        run: cargo test
+
+      - name: Notify on fail (windows)
+        if: ${{ failure() && matrix.os == 'windows-latest' }}
+        run: |
+          $body = @{
+              msgtype = "text"
+              text = @{
+                  content = "🤣 moon ci on windows-latest failed: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{github.run_id}}"
+              }
+          } | ConvertTo-Json
+
+          Invoke-RestMethod -Uri "https://qyapi.weixin.qq.com/cgi-bin/webhook/send?key=$env:WECOM_ROBOT_KEY" -Method Post -ContentType "application/json" -Body $body
+
+      - name: notify on fail (unix)
+        if: ${{ failure() && matrix.os != 'windows-latest' }}
+        run: |
+          curl "https://qyapi.weixin.qq.com/cgi-bin/webhook/send?key=$WECOM_ROBOT_KEY" \
+            -H 'Content-Type: application/json' \
+            -d @- <<REQUEST_BODY
+            {
+              "msgtype": "text",
+              "text": {
+                "content": "🤣 moon ci on ${{matrix.os}} failed: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}"
+              }
+            }
+          REQUEST_BODY
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 00000000..9d87e970
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+/target
+**/target
+.vscode/
+.DS_store
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 00000000..2049fd8d
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,2761 @@
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+ "windows-sys 0.48.0",
+]
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+dependencies = [
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+]
+
+[[package]]
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+
+[[package]]
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+version = "0.1.0"
+dependencies = [
+ "anyhow",
+ "clap",
+ "xshell",
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+
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+dependencies = [
+ "byteorder",
+ "crc32fast",
+ "crossbeam-utils",
+ "flate2",
+]
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 00000000..48d83359
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,93 @@
+[workspace]
+members = ["xtask", "./crates/*"]
+resolver = "2"
+default-members = ["./crates/*"]
+
+[workspace.package]
+rust-version = "1.77"
+edition = "2021"
+
+[workspace.dependencies]
+n2 = { git = "https://github.com/moonbitlang/n2.git" }
+moonbuild = { path = "./crates/moonbuild", version = "*" }
+mooncake = { path = "./crates/mooncake", version = "*" }
+moonutil = { path = "./crates/moonutil", version = "*" }
+anyhow = { version = "1.0.30" }
+bincode = "1.3.3"
+clap = { version = "4.5.4", features = ["derive"] }
+colored = "2.1.0"
+ctrlc = { version = "3.4.4", features = ["termination"] }
+dunce = "1.0.4"
+expect-test = "1.5.0"
+futures = { version = "0.3.29", features = ["std"], default-features = false }
+indexmap = { version = "2.2.6", features = ["serde"] }
+notify = "6.1.1"
+reqwest = { version = "0.11.22", features = [
+  "multipart",
+  "blocking",
+  "json",
+  "stream",
+] }
+petgraph = { version = "0.6.4", features = [
+  "graphmap",
+], default-features = false }
+serde = { version = "1.0.163", features = ["derive"] }
+serde_json = { version = "1.0.97", features = ["preserve_order"] }
+serde_json_lenient = { version = "0.2.1", features = ["preserve_order"] }
+sysinfo = "0.29.9"
+tokio = { version = "1.34.0", features = [
+  "rt-multi-thread",
+  "macros",
+  "signal",
+  "process",
+] }
+walkdir = "2.5.0"
+which = "6.0.1"
+zip = { version = "0.6.6", features = ["deflate"], default-features = false }
+home = "0.5.0"
+semver = { version = "1.0.22", features = ["serde"] }
+sha2 = "0.10.8"
+chrono = { version = "0.4.31", features = [
+  "clock",
+  "std",
+], default-features = false }
+hyper = "1.3.1"
+hyper-util = { version = "0.1.3", features = ["http1", "server", "tokio"] }
+hyper-staticfile = "0.10.0"
+http = "1.1.0"
+bytes = "1.6"
+dialoguer = { version = "0.11.0", features = [
+  "password",
+], default-features = false }
+regex = { version = "1.10.4", default-features = false }
+self-replace = "1.3.7"
+tempfile = "3.10.1"
+console = { version = "0.15.8", default-features = false }
+dissimilar = "1.0.8"
+line-index = "0.1.1"
+text-size = "1.1.1"
+log = "0.4.20"
+env_logger = "0.10.0"
+thiserror = "1.0"
+test-log = "0.2"
+fs4 = { version = "0.8.3", features = ["sync"] }
+ariadne = { version = "0.4.1", features = ["auto-color"] }
+
+[profile.release]
+debug = false
+lto = true
+
+# stripping of debuginfo and similar auxiliary data from binaries during linking
+# refer to https://doc.rust-lang.org/rustc/codegen-options/index.html#strip
+strip = true
+
+# make optimization level to z, which means the minimum binary volume
+# refer to https://doc.rust-lang.org/rustc/codegen-options/index.html#opt-level
+opt-level = 'z'
+
+# Cargo has 16 parallel code generation units enabled by default, which improves compilation speed but hinders some optimizations
+# refer to https://doc.rust-lang.org/rustc/codegen-options/index.html#codegen-units
+codegen-units = 1
+
+# terminate the process upon panic, panic = 'abort' reduced by 0.6M, but it will lose stack information
+# panic = 'abort'
diff --git a/README.md b/README.md
new file mode 100644
index 00000000..f41887d9
--- /dev/null
+++ b/README.md
@@ -0,0 +1,54 @@
+[![codecov](https://codecov.io/gh/moonbitlang/moon/graph/badge.svg?token=Wsok0pPEvI)](https://codecov.io/gh/moonbitlang/moon)
+![check](https://github.com/moonbitlang/moon/actions/workflows/ci.yml/badge.svg)
+
+# moon
+
+The build system and package manager for MoonBit.
+
+```bash
+$ moon              
+The build system and package manager for MoonBit.
+
+Usage: moon [OPTIONS] <COMMAND>
+
+Commands:
+  new                    Create a new moonbit package
+  build                  Build the current package
+  check                  Check the current package, but don't build object files
+  run                    Run WebAssembly module
+  test                   Test the current package
+  clean                  Clean the target directory
+  fmt                    Format moonbit source code
+  doc                    Generate documentation
+  info                   Generate public interface (`.mbti`) files for all packages in the module
+  add                    Add a dependency
+  remove                 Remove a dependency
+  install                Install dependencies
+  tree                   Display the dependency tree
+  login                  Log in to your account
+  register               Register an account at mooncakes.io
+  publish                Publish the current package
+  update                 Update the package registry index
+  coverage               Code coverage utilities
+  generate-build-matrix  Generate build matrix for benchmarking (legacy feature)
+  upgrade                Upgrade toolchains
+  version                Print version info and exit
+  help                   Print this message or the help of the given subcommand(s)
+
+Options:
+      --source-dir <SOURCE_DIR>  The source code directory. Defaults to the current directory
+      --target-dir <TARGET_DIR>  The target directory. Defaults to `source_dir/target`
+  -q, --quiet                    Suppress output
+  -v, --verbose                  Increase verbosity
+      --trace                    Trace the execution of the program
+      --dry-run                  Do not actually run the command
+  -h, --help                     Print help
+```
+
+See tutorials at
+[MoonBit's Build System Tutorial](https://www.moonbitlang.com/docs/build-system-tutorial)
+
+## Contributing
+
+To contribute, please read the contribution guidelines at
+[docs/dev](./docs/dev/README.md).
diff --git a/crates/moon/Cargo.toml b/crates/moon/Cargo.toml
new file mode 100644
index 00000000..2b2ad223
--- /dev/null
+++ b/crates/moon/Cargo.toml
@@ -0,0 +1,46 @@
+[package]
+name = "moon"
+version = "0.1.0"
+edition.workspace = true
+exclude = [".github/*", ".vscode/*"]
+readme = "README.md"
+rust-version.workspace = true
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+moonbuild.workspace = true
+mooncake.workspace = true
+moonutil.workspace = true
+n2.workspace = true
+semver.workspace = true
+clap.workspace = true
+anyhow.workspace = true
+colored.workspace = true
+serde.workspace = true
+serde_json_lenient.workspace = true
+serde_json.workspace = true
+dialoguer.workspace = true
+dunce.workspace = true
+ctrlc.workspace = true
+home.workspace = true
+which.workspace = true
+chrono.workspace = true
+env_logger.workspace = true
+log.workspace = true
+walkdir.workspace = true
+regex.workspace = true
+tokio.workspace = true
+futures.workspace = true
+
+[target.'cfg(not(windows))'.dependencies]
+openssl = { version = "0.10.60", features = ["vendored"] }
+
+[dev-dependencies]
+tempfile = "3.6.0"
+snapbox = "0.4.15"
+expect-test.workspace = true
+
+[[bin]]
+name = "moon"
+bench = false
diff --git a/crates/moon/src/cli.rs b/crates/moon/src/cli.rs
new file mode 100644
index 00000000..58fb65b1
--- /dev/null
+++ b/crates/moon/src/cli.rs
@@ -0,0 +1,219 @@
+pub mod build;
+pub mod build_matrix;
+pub mod bundle;
+pub mod check;
+pub mod clean;
+pub mod coverage;
+pub mod deps;
+pub mod doc;
+pub mod fmt;
+pub mod generate_test_driver;
+pub mod info;
+pub mod mooncake_adapter;
+pub mod new;
+pub mod run;
+pub mod test;
+pub mod update;
+pub mod upgrade;
+pub mod version;
+
+pub use build::*;
+pub use build_matrix::*;
+pub use bundle::*;
+pub use check::*;
+pub use clean::*;
+pub use coverage::*;
+pub use deps::*;
+pub use doc::*;
+pub use fmt::*;
+pub use generate_test_driver::*;
+pub use info::*;
+pub use new::*;
+pub use run::*;
+pub use test::*;
+pub use update::*;
+pub use upgrade::*;
+pub use version::*;
+
+use std::path::Path;
+
+use anyhow::bail;
+use moonutil::{
+    cli::UniversalFlags,
+    common::{
+        read_module_desc_file_in_dir, BuildPackageFlags, LinkCoreFlags, MooncOpt, OutputFormat,
+        SurfaceTarget, TargetBackend, MOONBITLANG_CORE, MOON_MOD_JSON,
+    },
+    mooncakes::{LoginSubcommand, PublishSubcommand, RegisterSubcommand},
+};
+
+#[derive(Debug, clap::Parser)]
+#[clap(
+    name = "moon",
+    about = "The build system and package manager for MoonBit."
+)]
+pub struct MoonBuildCli {
+    #[clap(subcommand)]
+    pub subcommand: MoonBuildSubcommands,
+
+    #[clap(flatten)]
+    pub flags: UniversalFlags,
+}
+
+#[derive(Debug, clap::Parser)]
+pub enum MoonBuildSubcommands {
+    New(NewSubcommand),
+
+    // Build system
+    Bundle(BundleSubcommand),
+    Build(BuildSubcommand),
+    Check(CheckSubcommand),
+    Run(RunSubcommand),
+    Test(TestSubcommand),
+    #[clap(hide = true)]
+    GenerateTestDriver(GeneratedTestDriverSubcommand),
+    Clean(CleanSubcommand),
+    Fmt(FmtSubcommand),
+    Doc(DocSubcommand),
+    Info(InfoSubcommand),
+
+    // Dependencies
+    Add(AddSubcommand),
+    Remove(RemoveSubcommand),
+    Install(InstallSubcommand),
+    Tree(TreeSubcommand),
+
+    // Mooncake
+    Login(LoginSubcommand),
+    Register(RegisterSubcommand),
+    Publish(PublishSubcommand),
+
+    Update(UpdateSubcommand),
+
+    // Misc
+    Coverage(CoverageSubcommand),
+    GenerateBuildMatrix(GenerateBuildMatrix),
+    /// Upgrade toolchains
+    Upgrade,
+    Version(VersionSubcommand),
+}
+
+#[derive(Debug, clap::Parser, Clone)]
+pub struct BuildFlags {
+    /// Enable the standard library (default)
+    #[clap(long)]
+    std: bool,
+
+    /// Disable the standard library
+    #[clap(long, long = "nostd")]
+    no_std: bool,
+
+    /// Emit debug information
+    #[clap(long, short = 'g')]
+    pub debug: bool,
+
+    /// Select output target
+    #[clap(long, value_delimiter = ',')]
+    pub target: Option<Vec<SurfaceTarget>>,
+
+    #[clap(skip)]
+    pub target_backend: Option<TargetBackend>,
+
+    #[clap(long, requires = "target")]
+    pub serial: bool,
+
+    /// Enable coverage instrumentation
+    #[clap(long)]
+    pub enable_coverage: bool,
+
+    /// Sort input files
+    #[clap(long)]
+    pub sort_input: bool,
+
+    /// Output WAT instead of WASM
+    // TODO: we need a more general name, like `--emit-asm` or even `--emit={binary,asm}`
+    #[clap(long)]
+    pub output_wat: bool,
+
+    /// treat all warnings as errors
+    #[clap(long, short)]
+    pub deny_warn: bool,
+
+    /// don't render diagnostics from moonc (don't pass '-error-format json' to moonc)
+    #[clap(long)]
+    pub no_render: bool,
+}
+
+impl BuildFlags {
+    pub fn std(&self) -> bool {
+        match (self.std, self.no_std) {
+            (false, false) => true,
+            (true, false) => true,
+            (false, true) => false,
+            (true, true) => panic!("both std and no_std flags are set"),
+        }
+    }
+}
+
+pub fn get_compiler_flags(src_dir: &Path, build_flags: &BuildFlags) -> anyhow::Result<MooncOpt> {
+    // read moon.mod.json
+    if !moonutil::common::check_moon_mod_exists(src_dir) {
+        bail!("could not find `{}`", MOON_MOD_JSON);
+    }
+    let moon_mod = read_module_desc_file_in_dir(src_dir)?;
+    let extra_build_opt = moon_mod.compile_flags.unwrap_or_default();
+    let extra_link_opt = moon_mod.link_flags.unwrap_or_default();
+
+    let output_format = if build_flags.output_wat {
+        OutputFormat::Wat
+    } else {
+        OutputFormat::Wasm
+    };
+
+    let target_backend = build_flags.target_backend.unwrap_or_default();
+
+    if target_backend == TargetBackend::Js && output_format == OutputFormat::Wat {
+        bail!("--output-wat is not supported for --target js");
+    }
+
+    let output_format = if target_backend == TargetBackend::Js {
+        OutputFormat::Js
+    } else {
+        output_format
+    };
+
+    let debug_flag = build_flags.debug;
+    let enable_coverage = build_flags.enable_coverage;
+    let source_map =
+        debug_flag && matches!(target_backend, TargetBackend::WasmGC | TargetBackend::Js);
+
+    let build_opt = BuildPackageFlags {
+        debug_flag,
+        source_map,
+        enable_coverage,
+        warn_lists: Default::default(),
+        alert_lists: Default::default(),
+        deny_warn: false,
+        target_backend,
+    };
+
+    let link_opt = LinkCoreFlags {
+        debug_flag,
+        source_map,
+        output_format,
+        target_backend,
+    };
+
+    let nostd = !build_flags.std() || moon_mod.name == MOONBITLANG_CORE;
+    let render =
+        !build_flags.no_render || std::env::var("MOON_NO_RENDER").unwrap_or_default() == "1";
+
+    Ok(MooncOpt {
+        build_opt,
+        link_opt,
+        extra_build_opt,
+        extra_link_opt,
+        nostd,
+        render,
+    })
+}
diff --git a/crates/moon/src/cli/build.rs b/crates/moon/src/cli/build.rs
new file mode 100644
index 00000000..0c00d341
--- /dev/null
+++ b/crates/moon/src/cli/build.rs
@@ -0,0 +1,143 @@
+use anyhow::Context;
+use moonbuild::dry_run;
+use moonbuild::entry;
+use mooncake::pkg::sync::auto_sync;
+use moonutil::common::lower_surface_targets;
+use moonutil::common::FileLock;
+use moonutil::common::MoonbuildOpt;
+use moonutil::common::RunMode;
+use moonutil::dirs::mk_arch_mode_dir;
+use moonutil::dirs::PackageDirs;
+use moonutil::mooncakes::sync::AutoSyncFlags;
+use moonutil::mooncakes::RegistryConfig;
+use n2::trace;
+use std::path::Path;
+use std::sync::Arc;
+use std::thread;
+
+use super::{BuildFlags, UniversalFlags};
+
+/// Build the current package
+#[derive(Debug, clap::Parser, Clone)]
+pub struct BuildSubcommand {
+    #[clap(flatten)]
+    pub build_flags: BuildFlags,
+
+    #[clap(flatten)]
+    pub auto_sync_flags: AutoSyncFlags,
+}
+
+pub fn run_build(cli: &UniversalFlags, cmd: &BuildSubcommand) -> anyhow::Result<i32> {
+    let PackageDirs {
+        source_dir,
+        target_dir,
+    } = cli.source_tgt_dir.try_into_package_dirs()?;
+    let _lock = FileLock::lock(&target_dir)?;
+    if cmd.build_flags.target.is_none() {
+        return run_build_internal(cli, cmd, &source_dir, &target_dir);
+    }
+    let surface_targets = cmd.build_flags.target.clone().unwrap();
+    let targets = lower_surface_targets(&surface_targets);
+
+    let mut ret_value = 0;
+    if cmd.build_flags.serial {
+        for t in targets {
+            let mut cmd = (*cmd).clone();
+            cmd.build_flags.target_backend = Some(t);
+            let x = run_build_internal(cli, &cmd, &source_dir, &target_dir)
+                .context(format!("failed to run build for target {:?}", t))?;
+            ret_value = ret_value.max(x);
+        }
+    } else {
+        let cli = Arc::new(cli.clone());
+        let source_dir = Arc::new(source_dir);
+        let target_dir = Arc::new(target_dir);
+        let mut handles = Vec::new();
+
+        for t in targets {
+            let cli = Arc::clone(&cli);
+            let mut cmd = (*cmd).clone();
+            cmd.build_flags.target_backend = Some(t);
+            let source_dir = Arc::clone(&source_dir);
+            let target_dir = Arc::clone(&target_dir);
+
+            let handle =
+                thread::spawn(move || run_build_internal(&cli, &cmd, &source_dir, &target_dir));
+
+            handles.push((t, handle));
+        }
+
+        for (backend, handle) in handles {
+            let x = handle
+                .join()
+                .unwrap()
+                .context(format!("failed to run build for target {:?}", backend))?;
+            ret_value = ret_value.max(x);
+        }
+    }
+    Ok(ret_value)
+}
+
+fn run_build_internal(
+    cli: &UniversalFlags,
+    cmd: &BuildSubcommand,
+    source_dir: &Path,
+    target_dir: &Path,
+) -> anyhow::Result<i32> {
+    // Run moon install before build
+    let (resolved_env, dir_sync_result) = auto_sync(
+        source_dir,
+        &cmd.auto_sync_flags,
+        &RegistryConfig::load(),
+        cli.quiet,
+    )?;
+
+    let mut moonc_opt = super::get_compiler_flags(source_dir, &cmd.build_flags)?;
+    moonc_opt.build_opt.deny_warn = cmd.build_flags.deny_warn;
+    let run_mode = RunMode::Build;
+    let target_dir = mk_arch_mode_dir(source_dir, target_dir, &moonc_opt, run_mode)?;
+    let sort_input = cmd.build_flags.sort_input;
+
+    let moonbuild_opt = MoonbuildOpt {
+        source_dir: source_dir.to_path_buf(),
+        target_dir,
+        sort_input,
+        run_mode,
+        quiet: cli.quiet,
+        verbose: cli.verbose,
+        ..Default::default()
+    };
+
+    let module = moonutil::scan::scan(
+        false,
+        &resolved_env,
+        &dir_sync_result,
+        &moonc_opt,
+        &moonbuild_opt,
+    )?;
+    moonc_opt.build_opt.warn_lists = module
+        .packages
+        .iter()
+        .map(|(name, pkg)| (name.clone(), pkg.warn_list.clone()))
+        .collect();
+    moonc_opt.build_opt.alert_lists = module
+        .packages
+        .iter()
+        .map(|(name, pkg)| (name.clone(), pkg.alert_list.clone()))
+        .collect();
+
+    if cli.dry_run {
+        return dry_run::print_commands(&module, &moonc_opt, &moonbuild_opt);
+    }
+
+    let trace_flag = cli.trace;
+    if trace_flag {
+        trace::open("trace.json").context("failed to open `trace.json`")?;
+    }
+
+    let result = entry::run_build(&moonc_opt, &moonbuild_opt, &module);
+    if trace_flag {
+        trace::close();
+    }
+    result
+}
diff --git a/crates/moon/src/cli/build_matrix.rs b/crates/moon/src/cli/build_matrix.rs
new file mode 100644
index 00000000..1282f981
--- /dev/null
+++ b/crates/moon/src/cli/build_matrix.rs
@@ -0,0 +1,56 @@
+use std::path::PathBuf;
+
+use anyhow::bail;
+
+use super::UniversalFlags;
+
+/// Generate build matrix for benchmarking (legacy feature)
+#[derive(Debug, clap::Parser)]
+pub struct GenerateBuildMatrix {
+    /// Set all of `drow`, `dcol`, `mrow`, `mcol` to the same value
+    #[clap(short = 'n')]
+    pub number: Option<u32>,
+
+    /// Number of directory rows
+    #[clap(long, long = "drow")]
+    pub dir_rows: Option<u32>,
+
+    /// Number of directory columns
+    #[clap(long, long = "dcol")]
+    pub dir_cols: Option<u32>,
+
+    /// Number of module rows
+    #[clap(long, long = "mrow")]
+    pub mod_rows: Option<u32>,
+
+    /// Number of module columns
+    #[clap(long, long = "mcol")]
+    pub mod_cols: Option<u32>,
+
+    #[clap(long, long = "output-dir", short, short = 'o')]
+    pub out_dir: PathBuf,
+}
+
+pub fn generate_build_matrix(
+    _cli: &UniversalFlags,
+    cmd: GenerateBuildMatrix,
+) -> anyhow::Result<i32> {
+    if _cli.dry_run {
+        bail!("dry-run is not implemented for bench")
+    }
+
+    let n = cmd.number.unwrap_or(1);
+    let dir_rows = cmd.dir_rows.unwrap_or(n);
+    let dir_cols = cmd.dir_cols.unwrap_or(n);
+    let mod_rows = cmd.mod_rows.unwrap_or(n);
+    let mod_cols = cmd.mod_cols.unwrap_or(n);
+
+    let mut config = moonbuild::bench::Config::new();
+    config.dir_rows = dir_rows;
+    config.dir_cols = dir_cols;
+    config.mod_rows = mod_rows;
+    config.mod_cols = mod_cols;
+
+    moonbuild::bench::write(&config, &cmd.out_dir);
+    Ok(0)
+}
diff --git a/crates/moon/src/cli/bundle.rs b/crates/moon/src/cli/bundle.rs
new file mode 100644
index 00000000..b0c3ea74
--- /dev/null
+++ b/crates/moon/src/cli/bundle.rs
@@ -0,0 +1,138 @@
+use anyhow::Context;
+use moonbuild::dry_run;
+use mooncake::pkg::sync::auto_sync;
+use moonutil::{
+    cli::UniversalFlags,
+    common::{lower_surface_targets, FileLock, MoonbuildOpt, RunMode, SurfaceTarget},
+    dirs::{mk_arch_mode_dir, PackageDirs},
+    mooncakes::{sync::AutoSyncFlags, RegistryConfig},
+};
+use std::{path::Path, sync::Arc, thread};
+
+use super::BuildFlags;
+
+/// Bundle the module
+#[derive(Debug, clap::Parser, Clone)]
+#[clap(hide(true))]
+pub struct BundleSubcommand {
+    #[clap(flatten)]
+    pub build_flags: BuildFlags,
+
+    /// Bundle all targets
+    #[clap(long)]
+    pub all: bool,
+
+    #[clap(flatten)]
+    pub auto_sync_flags: AutoSyncFlags,
+}
+
+pub fn run_bundle(cli: UniversalFlags, cmd: BundleSubcommand) -> anyhow::Result<i32> {
+    let PackageDirs {
+        source_dir,
+        target_dir,
+    } = cli.source_tgt_dir.try_into_package_dirs()?;
+    let _lock = FileLock::lock(&target_dir)?;
+    let target = if cmd.all {
+        Some(vec![SurfaceTarget::All])
+    } else {
+        cmd.build_flags.target.clone()
+    };
+
+    if target.is_none() {
+        return run_bundle_internal(&cli, &cmd, &source_dir, &target_dir);
+    }
+
+    let mut surface_targets = target.clone().unwrap();
+    if cmd.all {
+        surface_targets.push(SurfaceTarget::All);
+    }
+    let targets = lower_surface_targets(&surface_targets);
+
+    let mut ret_value = 0;
+    if cmd.build_flags.serial {
+        for t in targets {
+            let mut cmd = cmd.clone();
+            cmd.build_flags.target_backend = Some(t);
+            let x = run_bundle_internal(&cli, &cmd, &source_dir, &target_dir)
+                .context(format!("failed to run bundle for target {:?}", t))?;
+            ret_value = ret_value.max(x);
+        }
+    } else {
+        let cli = Arc::new(cli);
+        let source_dir = Arc::new(source_dir);
+        let target_dir = Arc::new(target_dir);
+        let mut handles = Vec::new();
+
+        for t in targets {
+            let cli = Arc::clone(&cli);
+            let mut cmd = cmd.clone();
+            cmd.build_flags.target_backend = Some(t);
+            let source_dir = Arc::clone(&source_dir);
+            let target_dir = Arc::clone(&target_dir);
+
+            let handle =
+                thread::spawn(move || run_bundle_internal(&cli, &cmd, &source_dir, &target_dir));
+
+            handles.push((t, handle));
+        }
+
+        for (backend, handle) in handles {
+            let x = handle
+                .join()
+                .unwrap()
+                .context(format!("failed to run bundle for target {:?}", backend))?;
+            ret_value = ret_value.max(x);
+        }
+    }
+    Ok(ret_value)
+}
+
+fn run_bundle_internal(
+    cli: &UniversalFlags,
+    cmd: &BundleSubcommand,
+    source_dir: &Path,
+    target_dir: &Path,
+) -> anyhow::Result<i32> {
+    // Run moon install before build
+    let (resolved_env, dir_sync_result) = auto_sync(
+        source_dir,
+        &cmd.auto_sync_flags,
+        &RegistryConfig::load(),
+        cli.quiet,
+    )?;
+
+    let mut moonc_opt = super::get_compiler_flags(source_dir, &cmd.build_flags)?;
+    let run_mode = RunMode::Bundle;
+    let sort_input = cmd.build_flags.sort_input;
+
+    let target_dir = mk_arch_mode_dir(source_dir, target_dir, &moonc_opt, run_mode)?;
+
+    let moonbuild_opt = MoonbuildOpt {
+        source_dir: source_dir.to_path_buf(),
+        target_dir,
+        sort_input,
+        run_mode,
+        ..Default::default()
+    };
+    let module = moonutil::scan::scan(
+        false,
+        &resolved_env,
+        &dir_sync_result,
+        &moonc_opt,
+        &moonbuild_opt,
+    )?;
+    moonc_opt.build_opt.warn_lists = module
+        .packages
+        .iter()
+        .map(|(name, pkg)| (name.clone(), pkg.warn_list.clone()))
+        .collect();
+    moonc_opt.build_opt.alert_lists = module
+        .packages
+        .iter()
+        .map(|(name, pkg)| (name.clone(), pkg.alert_list.clone()))
+        .collect();
+    if cli.dry_run {
+        return dry_run::print_commands(&module, &moonc_opt, &moonbuild_opt);
+    }
+    moonbuild::entry::run_bundle(&module, &moonbuild_opt, &moonc_opt)
+}
diff --git a/crates/moon/src/cli/check.rs b/crates/moon/src/cli/check.rs
new file mode 100644
index 00000000..960c2622
--- /dev/null
+++ b/crates/moon/src/cli/check.rs
@@ -0,0 +1,170 @@
+use anyhow::Context;
+use moonbuild::check;
+use moonbuild::dry_run;
+use moonbuild::watcher_is_running;
+use moonbuild::{entry, MOON_PID_NAME};
+use mooncake::pkg::sync::auto_sync;
+use moonutil::cli::UniversalFlags;
+use moonutil::common::lower_surface_targets;
+use moonutil::common::FileLock;
+use moonutil::common::MoonbuildOpt;
+use moonutil::common::RunMode;
+use moonutil::dirs::mk_arch_mode_dir;
+use moonutil::dirs::PackageDirs;
+use moonutil::mooncakes::sync::AutoSyncFlags;
+use moonutil::mooncakes::RegistryConfig;
+use n2::trace;
+use std::path::Path;
+use std::sync::Arc;
+use std::thread;
+
+use super::{get_compiler_flags, BuildFlags};
+
+/// Check the current package, but don't build object files
+#[derive(Debug, clap::Parser, Clone)]
+pub struct CheckSubcommand {
+    /// Monitor the file system and automatically check files
+    #[clap(long, short)]
+    pub watch: bool,
+
+    #[clap(flatten)]
+    pub build_flags: BuildFlags,
+
+    #[clap(flatten)]
+    pub auto_sync_flags: AutoSyncFlags,
+}
+
+pub fn run_check(cli: &UniversalFlags, cmd: &CheckSubcommand) -> anyhow::Result<i32> {
+    let PackageDirs {
+        source_dir,
+        target_dir,
+    } = cli.source_tgt_dir.try_into_package_dirs()?;
+    let _lock = FileLock::lock(&target_dir)?;
+    if cmd.build_flags.target.is_none() {
+        return run_check_internal(cli, cmd, &source_dir, &target_dir);
+    }
+
+    let surface_targets = cmd.build_flags.target.clone().unwrap();
+    let targets = lower_surface_targets(&surface_targets);
+
+    let mut ret_value = 0;
+    if cmd.build_flags.serial {
+        for t in targets {
+            let mut cmd = (*cmd).clone();
+            cmd.build_flags.target_backend = Some(t);
+            let x = run_check_internal(cli, &cmd, &source_dir, &target_dir)
+                .context(format!("failed to run check for target {:?}", t))?;
+            ret_value = ret_value.max(x);
+        }
+    } else {
+        let cli = Arc::new(cli.clone());
+        let source_dir = Arc::new(source_dir);
+        let target_dir = Arc::new(target_dir);
+        let mut handles = Vec::new();
+
+        for t in &targets {
+            let cli = Arc::clone(&cli);
+            let mut cmd = (*cmd).clone();
+            cmd.build_flags.target_backend = Some(*t);
+            let source_dir = Arc::clone(&source_dir);
+            let target_dir = Arc::clone(&target_dir);
+
+            let handle =
+                thread::spawn(move || run_check_internal(&cli, &cmd, &source_dir, &target_dir));
+
+            handles.push((*t, handle));
+        }
+
+        for (backend, handle) in handles {
+            let x = handle
+                .join()
+                .unwrap()
+                .context(format!("failed to run check for target {:?}", backend))?;
+            ret_value = ret_value.max(x);
+        }
+    }
+    Ok(ret_value)
+}
+
+fn run_check_internal(
+    cli: &UniversalFlags,
+    cmd: &CheckSubcommand,
+    source_dir: &Path,
+    target_dir: &Path,
+) -> anyhow::Result<i32> {
+    // Run moon install before build
+    let (resolved_modules, dir_sync_result) = auto_sync(
+        source_dir,
+        &cmd.auto_sync_flags,
+        &RegistryConfig::load(),
+        cli.quiet,
+    )?;
+
+    let mut moonc_opt = get_compiler_flags(source_dir, &cmd.build_flags)?;
+    moonc_opt.build_opt.deny_warn = cmd.build_flags.deny_warn;
+    let run_mode = RunMode::Check;
+    let target_dir = mk_arch_mode_dir(source_dir, target_dir, &moonc_opt, run_mode)?;
+
+    let sort_input = cmd.build_flags.sort_input;
+
+    let moonbuild_opt = MoonbuildOpt {
+        source_dir: source_dir.to_path_buf(),
+        target_dir: target_dir.clone(),
+        sort_input,
+        run_mode,
+        quiet: cli.quiet,
+        verbose: cli.verbose,
+        ..Default::default()
+    };
+
+    let module = moonutil::scan::scan(
+        false,
+        &resolved_modules,
+        &dir_sync_result,
+        &moonc_opt,
+        &moonbuild_opt,
+    )?;
+    moonc_opt.build_opt.warn_lists = module
+        .packages
+        .iter()
+        .map(|(name, pkg)| (name.clone(), pkg.warn_list.clone()))
+        .collect();
+    moonc_opt.build_opt.alert_lists = module
+        .packages
+        .iter()
+        .map(|(name, pkg)| (name.clone(), pkg.alert_list.clone()))
+        .collect();
+    if cli.dry_run {
+        return dry_run::print_commands(&module, &moonc_opt, &moonbuild_opt);
+    }
+
+    if cli.trace {
+        trace::open("trace.json").context("failed to open `trace.json`")?;
+    }
+
+    let watch_mode = cmd.watch;
+
+    if watch_mode {
+        let reg_cfg = RegistryConfig::load();
+        check::watch::watch_single_thread(&moonc_opt, &moonbuild_opt, &reg_cfg, &module)
+    } else {
+        let pid_path = target_dir.join(MOON_PID_NAME);
+        let running = watcher_is_running(&pid_path);
+
+        if let Ok(true) = running {
+            let output_path = target_dir.join("check.output");
+            let output = std::fs::read_to_string(&output_path)
+                .context(format!("failed to open `{}`", output_path.display()))?;
+            if !output.trim().is_empty() {
+                println!("{}", output.trim());
+            }
+            Ok(if output.is_empty() { 0 } else { 1 })
+        } else {
+            let result = entry::run_check(&moonc_opt, &moonbuild_opt, &module);
+            if cli.trace {
+                trace::close();
+            }
+            result
+        }
+    }
+}
diff --git a/crates/moon/src/cli/clean.rs b/crates/moon/src/cli/clean.rs
new file mode 100644
index 00000000..b79a8e93
--- /dev/null
+++ b/crates/moon/src/cli/clean.rs
@@ -0,0 +1,28 @@
+use anyhow::{bail, Context};
+use moonutil::{
+    cli::UniversalFlags,
+    common::{FileLock, MOON_MOD_JSON},
+};
+
+/// Clean the target directory
+#[derive(Debug, clap::Parser)]
+pub struct CleanSubcommand {}
+
+pub fn run_clean(cli: &UniversalFlags) -> anyhow::Result<i32> {
+    if cli.dry_run {
+        bail!("dry-run is not implemented for clean");
+    }
+
+    let src_tgt = cli.source_tgt_dir.try_into_package_dirs()?;
+
+    let _lock = FileLock::lock(&src_tgt.target_dir)?;
+
+    if !moonutil::common::check_moon_mod_exists(&src_tgt.source_dir) {
+        bail!("could not find `{}`", MOON_MOD_JSON);
+    }
+
+    if src_tgt.target_dir.is_dir() {
+        std::fs::remove_dir_all(src_tgt.target_dir).context("failed to remove target directory")?;
+    }
+    Ok(0)
+}
diff --git a/crates/moon/src/cli/coverage.rs b/crates/moon/src/cli/coverage.rs
new file mode 100644
index 00000000..e46ff654
--- /dev/null
+++ b/crates/moon/src/cli/coverage.rs
@@ -0,0 +1,103 @@
+//! CLI and utilities related to code coverage.
+
+use std::{ffi::OsStr, path::Path};
+
+use anyhow::Context;
+use moonutil::dirs::PackageDirs;
+use walkdir::WalkDir;
+
+use super::UniversalFlags;
+
+#[derive(Debug, clap::Parser)]
+#[clap(
+    allow_external_subcommands(true),
+    disable_help_flag(true),
+    ignore_errors(true)
+)]
+pub struct CoverageReportSubcommand {
+    /// Arguments to pass to the coverage utility
+    #[clap(name = "args", allow_hyphen_values(true))]
+    pub args: Vec<String>,
+
+    /// Show help for the coverage utility
+    #[clap(short, long)]
+    pub help: bool,
+}
+
+#[derive(Debug, clap::Parser)]
+pub enum CoverageSubcommands {
+    /// Generate code coverage report
+    Report(CoverageReportSubcommand),
+    /// Clean up coverage artifacts
+    Clean,
+}
+
+/// Code coverage utilities
+#[derive(Debug, clap::Parser)]
+pub struct CoverageSubcommand {
+    #[clap(subcommand)]
+    pub cmd: CoverageSubcommands,
+}
+
+pub fn run_coverage(cli: UniversalFlags, cmd: CoverageSubcommand) -> anyhow::Result<i32> {
+    let res = match cmd.cmd {
+        CoverageSubcommands::Report(args) => run_coverage_report(cli, args),
+        CoverageSubcommands::Clean => run_coverage_clean(cli)?,
+    };
+    res.context("Unable to run coverage command")
+}
+
+fn run_coverage_clean(cli: UniversalFlags) -> Result<Result<i32, anyhow::Error>, anyhow::Error> {
+    let PackageDirs {
+        source_dir: src,
+        target_dir: tgt,
+    } = cli.source_tgt_dir.try_into_package_dirs()?;
+    clean_coverage_artifacts(&src, &tgt)?;
+    Ok(Ok(0))
+}
+
+fn run_coverage_report(cli: UniversalFlags, args: CoverageReportSubcommand) -> anyhow::Result<i32> {
+    // if help is requested, delegate to the external command
+    if args.help {
+        return run_coverage_report_command(
+            std::iter::once("--help"),
+            &std::env::current_dir().unwrap_or(".".into()),
+        )
+        .context("Unable to get help from coverage utility")?
+        .code()
+        .ok_or_else(|| anyhow::anyhow!("Unable to get exit code"));
+    }
+
+    let PackageDirs {
+        source_dir: src,
+        target_dir: _tgt,
+    } = cli.source_tgt_dir.try_into_package_dirs()?;
+
+    let res = run_coverage_report_command(args.args, &src);
+    res.context("Unable to run coverage report")?
+        .code()
+        .ok_or_else(|| anyhow::anyhow!("Coverage report command exited without a status code"))
+}
+
+/// Clean up coverage artifacts by removing all files with name `moonbit_coverage_*.txt` in the current directory and target
+fn clean_coverage_artifacts(_src: &Path, tgt: &Path) -> anyhow::Result<()> {
+    for file in WalkDir::new(tgt) {
+        let file = file?;
+        let file_name = file.file_name();
+        let file_name = file_name.to_string_lossy();
+        if file_name.starts_with("moonbit_coverage_") && file_name.ends_with(".txt") {
+            std::fs::remove_file(file.path())?;
+        }
+    }
+    Ok(())
+}
+
+fn run_coverage_report_command(
+    args: impl IntoIterator<Item = impl AsRef<OsStr>>,
+    cwd: &Path,
+) -> std::io::Result<std::process::ExitStatus> {
+    let mut cmd = std::process::Command::new("moon_cove_report");
+    cmd.current_dir(cwd);
+    cmd.args(args);
+    cmd.status()
+}
diff --git a/crates/moon/src/cli/deps.rs b/crates/moon/src/cli/deps.rs
new file mode 100644
index 00000000..9979893d
--- /dev/null
+++ b/crates/moon/src/cli/deps.rs
@@ -0,0 +1,120 @@
+use anyhow::bail;
+use moonutil::{
+    dirs::PackageDirs,
+    mooncakes::{ModuleName, RegistryConfig},
+};
+
+use super::UniversalFlags;
+
+/// Install dependencies
+#[derive(Debug, clap::Parser)]
+pub struct InstallSubcommand {}
+
+/// Remove a dependency
+#[derive(Debug, clap::Parser)]
+pub struct RemoveSubcommand {
+    /// The package path to remove
+    pub package_path: String,
+}
+
+/// Add a dependency
+#[derive(Debug, clap::Parser)]
+pub struct AddSubcommand {
+    /// The package path to add
+    pub package_path: String,
+}
+
+/// Display the dependency tree
+#[derive(Debug, clap::Parser)]
+pub struct TreeSubcommand {}
+
+pub fn install_cli(cli: UniversalFlags, _cmd: InstallSubcommand) -> anyhow::Result<i32> {
+    let PackageDirs {
+        source_dir,
+        target_dir,
+    } = cli.source_tgt_dir.try_into_package_dirs()?;
+    let registry_config = RegistryConfig::load();
+    mooncake::pkg::install::install(&source_dir, &target_dir, &registry_config, false)
+}
+
+pub fn remove_cli(cli: UniversalFlags, cmd: RemoveSubcommand) -> anyhow::Result<i32> {
+    let PackageDirs {
+        source_dir,
+        target_dir,
+    } = cli.source_tgt_dir.try_into_package_dirs()?;
+    let package_path = cmd.package_path;
+    let parts: Vec<&str> = package_path.splitn(2, '/').collect();
+    if parts.len() != 2 {
+        bail!("package path must be in the form of <author>/<package_name>");
+    }
+    let username = parts[0];
+    let pkgname = parts[1];
+    let registry_config = RegistryConfig::load();
+    mooncake::pkg::remove::remove(
+        &source_dir,
+        &target_dir,
+        username,
+        pkgname,
+        &registry_config,
+    )
+}
+
+pub fn add_cli(cli: UniversalFlags, cmd: AddSubcommand) -> anyhow::Result<i32> {
+    let PackageDirs {
+        source_dir,
+        target_dir,
+    } = cli.source_tgt_dir.try_into_package_dirs()?;
+    let package_path = cmd.package_path;
+
+    let parts: Vec<&str> = package_path.splitn(2, '@').collect();
+    if parts.len() == 2 {
+        let version: &str = parts[1];
+        let version = version.parse()?;
+
+        let parts: Vec<&str> = parts[0].splitn(2, '/').collect();
+        if parts.len() != 2 {
+            bail!("package path must be in the form of <author>/<package_name>[@<version>]");
+        }
+        let username = parts[0];
+        let pkgname = parts[1];
+
+        let registry_config = RegistryConfig::load();
+        let name = ModuleName {
+            username: username.to_string(),
+            pkgname: pkgname.to_string(),
+        };
+        mooncake::pkg::add::add(
+            &source_dir,
+            &target_dir,
+            &name,
+            &version,
+            &registry_config,
+            false,
+        )
+    } else {
+        let parts: Vec<&str> = parts[0].splitn(2, '/').collect();
+        if parts.len() < 2 {
+            bail!("package path must be in the form of <author>/<package_name>[@<version>]");
+        }
+        let username = parts[0];
+        let pkgname = parts[1];
+
+        let registry_config = RegistryConfig::load();
+        mooncake::pkg::add::add_latest(
+            &source_dir,
+            &target_dir,
+            username,
+            pkgname,
+            &registry_config,
+            false,
+        )
+    }
+}
+
+pub fn tree_cli(cli: UniversalFlags, _cmd: TreeSubcommand) -> anyhow::Result<i32> {
+    let PackageDirs {
+        source_dir,
+        target_dir,
+    } = cli.source_tgt_dir.try_into_package_dirs()?;
+    mooncake::pkg::tree::tree(&source_dir, &target_dir)
+}
diff --git a/crates/moon/src/cli/doc.rs b/crates/moon/src/cli/doc.rs
new file mode 100644
index 00000000..4fe75ad7
--- /dev/null
+++ b/crates/moon/src/cli/doc.rs
@@ -0,0 +1,107 @@
+use anyhow::bail;
+use mooncake::pkg::sync::auto_sync;
+use moonutil::common::{
+    read_module_desc_file_in_dir, CargoPathExt, FileLock, MoonbuildOpt, MooncOpt, RunMode,
+    MOONBITLANG_CORE,
+};
+use moonutil::dirs::{mk_arch_mode_dir, PackageDirs};
+use moonutil::mooncakes::sync::AutoSyncFlags;
+use moonutil::mooncakes::RegistryConfig;
+
+use super::UniversalFlags;
+
+/// Generate documentation
+#[derive(Debug, clap::Parser)]
+pub struct DocSubcommand {
+    /// Start a web server to serve the documentation
+    #[clap(long)]
+    pub serve: bool,
+
+    #[clap(long, short, default_value = "127.0.0.1")]
+    pub bind: String,
+
+    #[clap(long, short, default_value = "3000")]
+    pub port: u16,
+
+    #[clap(flatten)]
+    pub auto_sync_flags: AutoSyncFlags,
+}
+
+pub fn run_doc(cli: UniversalFlags, cmd: DocSubcommand) -> anyhow::Result<i32> {
+    let PackageDirs {
+        source_dir,
+        target_dir,
+    } = cli.source_tgt_dir.try_into_package_dirs()?;
+
+    let _lock = FileLock::lock(&target_dir)?;
+
+    let static_dir = target_dir.join("doc");
+    if static_dir.exists() {
+        static_dir.rm_rf();
+    }
+    let serve = cmd.serve;
+    let bind = cmd.bind;
+    let port = cmd.port;
+
+    if cli.dry_run {
+        println!(
+            "moondoc {} -o {}{}",
+            source_dir.display(),
+            static_dir.display(),
+            if serve { " -serve-mode" } else { "" }
+        );
+        return Ok(0);
+    }
+
+    let mod_desc = read_module_desc_file_in_dir(&source_dir)?;
+
+    let mut moonc_opt = MooncOpt::default();
+    if mod_desc.name == MOONBITLANG_CORE {
+        moonc_opt.nostd = true;
+    }
+
+    let (resolved_env, dir_sync_result) = auto_sync(
+        &source_dir,
+        &cmd.auto_sync_flags,
+        &RegistryConfig::load(),
+        cli.quiet,
+    )?;
+
+    let run_mode = RunMode::Check;
+    let target_dir = mk_arch_mode_dir(&source_dir, &target_dir, &moonc_opt, run_mode)?;
+    let moonbuild_opt = MoonbuildOpt {
+        source_dir: source_dir.clone(),
+        target_dir,
+        sort_input: false,
+        run_mode,
+        ..Default::default()
+    };
+
+    let module = moonutil::scan::scan(
+        false,
+        &resolved_env,
+        &dir_sync_result,
+        &moonc_opt,
+        &moonbuild_opt,
+    )?;
+    moonbuild::entry::run_check(&moonc_opt, &moonbuild_opt, &module)?;
+
+    let mut args = vec![
+        source_dir.display().to_string(),
+        "-o".to_string(),
+        static_dir.display().to_string(),
+    ];
+    if serve {
+        args.push("-serve-mode".to_string())
+    }
+    let output = std::process::Command::new("moondoc").args(&args).output()?;
+    if output.status.code().unwrap() != 0 {
+        eprintln!("{}", String::from_utf8_lossy(&output.stderr));
+        bail!("failed to generate documentation");
+    }
+
+    if serve {
+        moonbuild::doc_http::start_server(static_dir, &mod_desc.name, bind, port)?;
+    }
+    Ok(0)
+}
diff --git a/crates/moon/src/cli/fmt.rs b/crates/moon/src/cli/fmt.rs
new file mode 100644
index 00000000..18f59bdc
--- /dev/null
+++ b/crates/moon/src/cli/fmt.rs
@@ -0,0 +1,61 @@
+use anyhow::bail;
+use mooncake::pkg::sync::auto_sync;
+use moonutil::{
+    common::{FileLock, FmtOpt, MoonbuildOpt, MooncOpt, RunMode},
+    dirs::{mk_arch_mode_dir, PackageDirs},
+    mooncakes::{sync::AutoSyncFlags, RegistryConfig},
+};
+
+use super::UniversalFlags;
+
+/// Format moonbit source code
+#[derive(Debug, clap::Parser)]
+pub struct FmtSubcommand {
+    #[clap(long)]
+    check: bool,
+
+    #[clap(long)]
+    pub sort_input: bool,
+}
+
+pub fn run_fmt(cli: &UniversalFlags, cmd: FmtSubcommand) -> anyhow::Result<i32> {
+    let PackageDirs {
+        source_dir,
+        target_dir,
+    } = cli.source_tgt_dir.try_into_package_dirs()?;
+
+    let _lock = FileLock::lock(&target_dir)?;
+
+    let moonc_opt = MooncOpt::default();
+    let run_mode = RunMode::Format;
+    let target_dir = mk_arch_mode_dir(&source_dir, &target_dir, &moonc_opt, run_mode)?;
+
+    // Resolve dependencies, but don't download anything
+    let (resolved_env, dir_sync_result) = auto_sync(
+        &source_dir,
+        &AutoSyncFlags { frozen: true },
+        &RegistryConfig::load(),
+        cli.quiet,
+    )?;
+
+    let moonbuild_opt = MoonbuildOpt {
+        source_dir,
+        target_dir: target_dir.clone(),
+        sort_input: cmd.sort_input,
+        run_mode,
+        fmt_opt: Some(FmtOpt { check: cmd.check }),
+        ..Default::default()
+    };
+
+    let module = moonutil::scan::scan(
+        false,
+        &resolved_env,
+        &dir_sync_result,
+        &moonc_opt,
+        &moonbuild_opt,
+    )?;
+    if cli.dry_run {
+        bail!("dry-run is not implemented for fmt");
+    }
+    moonbuild::entry::run_fmt(&module, &moonc_opt, &moonbuild_opt)
+}
diff --git a/crates/moon/src/cli/generate_test_driver.rs b/crates/moon/src/cli/generate_test_driver.rs
new file mode 100644
index 00000000..b9dd2121
--- /dev/null
+++ b/crates/moon/src/cli/generate_test_driver.rs
@@ -0,0 +1,283 @@
+use super::BuildFlags;
+use anyhow::bail;
+use colored::Colorize;
+use mooncake::pkg::sync::auto_sync;
+use moonutil::cli::UniversalFlags;
+use moonutil::common::{
+    lower_surface_targets, MoonbuildOpt, RunMode, TestOpt, MOONBITLANG_CORE,
+    MOON_TEST_DELIMITER_BEGIN, MOON_TEST_DELIMITER_END,
+};
+use moonutil::dirs::PackageDirs;
+use moonutil::mooncakes::sync::AutoSyncFlags;
+use moonutil::mooncakes::RegistryConfig;
+use regex::Regex;
+use std::path::{Path, PathBuf};
+
+/// Test the current package
+#[derive(Debug, clap::Parser)]
+pub struct GeneratedTestDriverSubcommand {
+    #[clap(flatten)]
+    pub build_flags: BuildFlags,
+
+    #[clap(short, long, num_args(0..))]
+    pub package: Option<Vec<PathBuf>>,
+
+    #[clap(short, long, requires("package"))]
+    pub file: Option<String>,
+
+    #[clap(short, long, requires("file"))]
+    pub index: Option<u32>,
+}
+
+pub fn generate_test_driver(
+    cli: UniversalFlags,
+    cmd: GeneratedTestDriverSubcommand,
+) -> anyhow::Result<i32> {
+    let PackageDirs {
+        source_dir,
+        target_dir,
+    } = cli.source_tgt_dir.try_into_package_dirs()?;
+
+    let mut cmd = cmd;
+    cmd.build_flags.target_backend = cmd.build_flags.target.as_ref().and_then(|surface_targets| {
+        if surface_targets.is_empty() {
+            None
+        } else {
+            Some(lower_surface_targets(surface_targets)[0])
+        }
+    });
+
+    let moonc_opt = super::get_compiler_flags(&source_dir, &cmd.build_flags)?;
+
+    let run_mode = RunMode::Test;
+    let sort_input = cmd.build_flags.sort_input;
+    let (filter_package, filter_file, filter_index) = (
+        cmd.package.map(|it| it.into_iter().collect()),
+        cmd.file,
+        cmd.index,
+    );
+
+    // Resolve dependencies, but don't download anything
+    let (resolved_env, dir_sync_result) = auto_sync(
+        &source_dir,
+        &AutoSyncFlags { frozen: true },
+        &RegistryConfig::load(),
+        cli.quiet,
+    )?;
+
+    let moonbuild_opt = MoonbuildOpt {
+        source_dir,
+        target_dir: target_dir.clone(),
+        test_opt: Some(TestOpt {
+            filter_package: filter_package.clone(),
+            filter_file: filter_file.clone(),
+            filter_index,
+        }),
+        fmt_opt: None,
+        sort_input,
+        run_mode,
+        ..Default::default()
+    };
+
+    let mut module = moonutil::scan::scan(
+        false,
+        &resolved_env,
+        &dir_sync_result,
+        &moonc_opt,
+        &moonbuild_opt,
+    )?;
+    if cli.dry_run {
+        bail!("dry-run is not implemented for generate-test-driver");
+    }
+
+    for (pkgname, pkg) in module.packages.iter_mut() {
+        if let Some(ref package) = filter_package {
+            if !package.contains(Path::new(pkgname)) {
+                continue;
+            }
+        }
+
+        if pkg.is_third_party {
+            continue;
+        }
+
+        let mut testcase_internal = vec![];
+        let mut testcase_underscore = vec![];
+        let mut testcase_blackbox = vec![];
+        let mut main_contain_test = false;
+
+        let file: Vec<PathBuf> = pkg
+            .files
+            .iter()
+            .chain(pkg.wbtest_files.iter())
+            .chain(pkg.test_files.iter())
+            .cloned()
+            .collect();
+
+        let backend_filtered =
+            moonutil::common::backend_filter(&file, moonc_opt.link_opt.target_backend);
+
+        for file in backend_filtered.iter() {
+            let content = std::fs::read_to_string(file)?;
+            let mut counter = 0;
+            let pattern =
+                Regex::new(r#"^test[[:blank:]]*("(?P<name>([^\\"]|\\.)*)")?.*$"#).unwrap();
+
+            let filename = file.file_name().unwrap().to_str().unwrap();
+            if let Some(ref filter_file) = filter_file {
+                if filter_file != filename {
+                    continue;
+                }
+            }
+
+            for line in content.lines() {
+                let escaped_filename = base16_encode_lower(filename.as_bytes());
+
+                if let Some(captured) = pattern.captures(line) {
+                    main_contain_test = true;
+                    let test_func_name = format!("__test_{}_{}", escaped_filename, counter);
+
+                    let description = if let Some(test_name) = captured.name("name") {
+                        if test_name.is_empty() {
+                            format!("{:?}", counter.to_string())
+                        } else {
+                            format!(r#""{}""#, test_name.as_str())
+                        }
+                    } else {
+                        format!("{:?}", counter.to_string())
+                    };
+
+                    counter += 1;
+                    if let Some(filter_index) = filter_index {
+                        if (filter_index + 1) != counter {
+                            continue;
+                        }
+                    }
+
+                    let line = format!("({:?}, {}, {}),", filename, description, test_func_name);
+                    let file_name = &file.file_stem().unwrap().to_str().unwrap();
+                    if file_name.ends_with("_wbtest") {
+                        testcase_underscore.push(line);
+                    } else if file_name.ends_with("_test") {
+                        testcase_blackbox.push(line);
+                    } else {
+                        testcase_internal.push(line);
+                    }
+                }
+            }
+        }
+        if pkg.is_main {
+            if main_contain_test {
+                eprintln!(
+                    "{}: tests in the main package `{}` will be ignored",
+                    "Warning".yellow().bold(),
+                    pkgname
+                )
+            }
+            continue;
+        }
+
+        {
+            let generated_content = generate_driver(&testcase_internal, pkgname);
+            let generated_file = target_dir
+                .join(pkg.rel.fs_full_name())
+                .join("__generated_driver_for_internal_test.mbt");
+
+            if !generated_file.parent().unwrap().exists() {
+                std::fs::create_dir_all(generated_file.parent().unwrap())?;
+            }
+            std::fs::write(&generated_file, &generated_content)?;
+        }
+
+        {
+            let generated_content = generate_driver(&testcase_underscore, pkgname);
+            let generated_file = target_dir
+                .join(pkg.rel.fs_full_name())
+                .join("__generated_driver_for_underscore_test.mbt");
+
+            if !generated_file.parent().unwrap().exists() {
+                std::fs::create_dir_all(generated_file.parent().unwrap())?;
+            }
+            std::fs::write(&generated_file, &generated_content)?;
+        }
+
+        {
+            let generated_content = generate_driver(&testcase_blackbox, pkgname);
+            let generated_file = target_dir
+                .join(pkg.rel.fs_full_name())
+                .join("__generated_driver_for_blackbox_test.mbt");
+
+            if !generated_file.parent().unwrap().exists() {
+                std::fs::create_dir_all(generated_file.parent().unwrap())?;
+            }
+            std::fs::write(&generated_file, &generated_content)?;
+        }
+    }
+
+    Ok(0)
+}
+
+fn generate_driver(lines: &[String], pkgname: &str) -> String {
+    let test_driver_template = {
+        let template = include_str!(concat!(
+            env!("CARGO_MANIFEST_DIR"),
+            "/../moonbuild/template/test_driver_template.mbt"
+        ));
+        if pkgname.starts_with(MOONBITLANG_CORE) {
+            template.replace(&format!("@{}/builtin.", MOONBITLANG_CORE), "")
+        } else {
+            template.to_string()
+        }
+    };
+
+    test_driver_template
+        .replace("// test identifiers", &lines.join("\n    "))
+        .replace("{package}", pkgname)
+        .replace("{begin_moontest}", MOON_TEST_DELIMITER_BEGIN)
+        .replace("{end_moontest}", MOON_TEST_DELIMITER_END)
+}
+
+fn base16_encode_lower(bytes: &[u8]) -> String {
+    fn to_char(x: u8) -> char {
+        if x < 10 {
+            (b'0' + x) as char
+        } else {
+            (b'a' + x - 10) as char
+        }
+    }
+
+    let mut result = String::with_capacity(bytes.len() * 2);
+    for &b in bytes {
+        let high = to_char(b >> 4);
+        let low = to_char(b & 0xf);
+        result.push(high);
+        result.push(low);
+    }
+    result
+}
+
+#[test]
+fn test_base16() {
+    #[allow(unused)]
+    use expect_test::{expect, Expect};
+
+    fn check(a: &str, b: expect_test::Expect) {
+        let bytes = a.as_bytes();
+        let b16 = base16_encode_lower(bytes);
+        b.assert_eq(&b16)
+    }
+
+    check(
+        "abcdefghijklmnopqrstuvwxyz0123456789",
+        expect!["6162636465666768696a6b6c6d6e6f707172737475767778797a30313233343536373839"],
+    );
+    check(
+        "一个中文字符串的编码",
+        expect!["e4b880e4b8aae4b8ade69687e5ad97e7aca6e4b8b2e79a84e7bc96e7a081"],
+    );
+    check(
+        "(){}[].+-*/='\"\\|~_:",
+        expect!["28297b7d5b5d2e2b2d2a2f3d27225c7c7e5f3a"],
+    );
+    check("filename.mbt", expect!["66696c656e616d652e6d6274"]);
+}
diff --git a/crates/moon/src/cli/info.rs b/crates/moon/src/cli/info.rs
new file mode 100644
index 00000000..2d6aba37
--- /dev/null
+++ b/crates/moon/src/cli/info.rs
@@ -0,0 +1,133 @@
+use anyhow::{bail, Context};
+use colored::Colorize;
+use futures::future::try_join_all;
+use mooncake::pkg::sync::auto_sync;
+use moonutil::{
+    common::{
+        read_module_desc_file_in_dir, FileLock, MoonbuildOpt, MooncOpt, RunMode, MOONBITLANG_CORE,
+        MOON_MOD_JSON,
+    },
+    dirs::PackageDirs,
+    mooncakes::{sync::AutoSyncFlags, RegistryConfig},
+};
+
+use super::UniversalFlags;
+
+/// Generate public interface (`.mbti`) files for all packages in the module
+#[derive(Debug, clap::Parser)]
+pub struct InfoSubcommand {
+    #[clap(flatten)]
+    pub auto_sync_flags: AutoSyncFlags,
+}
+
+pub fn run_info(cli: UniversalFlags, cmd: InfoSubcommand) -> anyhow::Result<i32> {
+    if cli.dry_run {
+        bail!("dry-run is not implemented for info")
+    }
+
+    let PackageDirs {
+        source_dir,
+        target_dir,
+    } = cli.source_tgt_dir.try_into_package_dirs()?;
+
+    let _lock = FileLock::lock(&target_dir)?;
+
+    // Run moon install before build
+    let (resolved_env, dir_sync_result) = auto_sync(
+        &source_dir,
+        &cmd.auto_sync_flags,
+        &RegistryConfig::load(),
+        cli.quiet,
+    )?;
+
+    let mod_desc = read_module_desc_file_in_dir(&source_dir).with_context(|| {
+        format!(
+            "failed to read module description file: {}",
+            source_dir
+                .join(MOON_MOD_JSON)
+                .display()
+                .to_string()
+                .bold()
+                .red()
+        )
+    })?;
+    let module_name = &mod_desc.name;
+    let mut moonc_opt = MooncOpt::default();
+    if module_name == MOONBITLANG_CORE {
+        moonc_opt.nostd = true;
+    }
+    let moonbuild_opt = MoonbuildOpt {
+        source_dir: source_dir.clone(),
+        target_dir: target_dir.clone(),
+        sort_input: false,
+        run_mode: RunMode::Check,
+        ..Default::default()
+    };
+
+    let module = moonutil::scan::scan(
+        false,
+        &resolved_env,
+        &dir_sync_result,
+        &moonc_opt,
+        &moonbuild_opt,
+    )?;
+    let check_result = moonbuild::entry::run_check(&moonc_opt, &moonbuild_opt, &module);
+    match check_result {
+        Ok(0) => {}
+        _ => {
+            bail!("moon check failed");
+        }
+    }
+    let mdb = moonutil::scan::scan(
+        false,
+        &resolved_env,
+        &dir_sync_result,
+        &moonc_opt,
+        &MoonbuildOpt {
+            source_dir: source_dir.clone(),
+            target_dir,
+            ..Default::default()
+        },
+    )?;
+
+    let runtime = tokio::runtime::Runtime::new()?;
+    let mut handlers = vec![];
+    for (name, pkg) in mdb.packages {
+        // Skip if pkg is not part of the module
+        if pkg.is_third_party {
+            continue;
+        }
+
+        let source_dir = std::sync::Arc::new(source_dir.clone());
+        handlers.push(async move {
+            let mi = pkg.artifact.with_extension("mi");
+            if !mi.exists() {
+                bail!("cannot find mi file for package {}", name);
+            }
+
+            let out = tokio::process::Command::new("mooninfo")
+                .args(["-format=text", mi.display().to_string().as_str()])
+                .output()
+                .await?;
+
+            if out.status.success() {
+                let filename = format!("{}.mbti", pkg.last_name());
+                let filepath = source_dir.join(pkg.rel.fs_full_name()).join(&filename);
+
+                tokio::fs::write(filepath, out.stdout)
+                    .await
+                    .context(format!("failed to write {}", filename))?;
+            } else {
+                eprintln!("{}", String::from_utf8_lossy(&out.stderr));
+                eprintln!("failed to run `mooninfo -format=text {}`", mi.display());
+            }
+
+            Ok(0)
+        });
+    }
+
+    // `try_join_all` will return immediately if anyone task fail
+    runtime.block_on(try_join_all(handlers))?;
+
+    Ok(0)
+}
diff --git a/crates/moon/src/cli/mooncake_adapter.rs b/crates/moon/src/cli/mooncake_adapter.rs
new file mode 100644
index 00000000..0425443a
--- /dev/null
+++ b/crates/moon/src/cli/mooncake_adapter.rs
@@ -0,0 +1,73 @@
+use std::process::Stdio;
+
+use anyhow::bail;
+use moonutil::{
+    cli::UniversalFlags,
+    mooncake_bin::call_mooncake,
+    mooncakes::{LoginSubcommand, MooncakeSubcommands, PublishSubcommand, RegisterSubcommand},
+};
+use serde::Serialize;
+
+pub fn execute_cli<T: Serialize>(
+    cli: UniversalFlags,
+    cmd: T,
+    args: &[&str],
+) -> anyhow::Result<i32> {
+    let mut child = call_mooncake()
+        .args(args)
+        .stdout(Stdio::inherit())
+        .stdin(Stdio::piped())
+        .stderr(Stdio::inherit())
+        .spawn()?;
+
+    if let Some(mut stdin) = child.stdin.take() {
+        let data = (cli, cmd);
+        serde_json::ser::to_writer(&mut stdin, &data)?;
+    } else {
+        eprintln!("failed to open stdin");
+    }
+
+    let status = child.wait()?;
+    if status.success() {
+        Ok(0)
+    } else {
+        bail!("failed to run")
+    }
+}
+
+pub fn execute_cli_with_inherit_stdin<T: Serialize>(
+    _cli: UniversalFlags,
+    _cmd: T,
+    args: &[&str],
+) -> anyhow::Result<i32> {
+    let mut child = call_mooncake()
+        .args(args)
+        .env("MOONCAKE_ALLOW_DIRECT", "1")
+        .stdout(Stdio::inherit())
+        .stdin(Stdio::inherit())
+        .stderr(Stdio::inherit())
+        .spawn()?;
+
+    let status = child.wait()?;
+    if status.success() {
+        Ok(0)
+    } else {
+        bail!("failed to run `moon {}`", args.join(" "))
+    }
+}
+
+pub fn login_cli(cli: UniversalFlags, cmd: LoginSubcommand) -> anyhow::Result<i32> {
+    execute_cli_with_inherit_stdin(cli, MooncakeSubcommands::Login(cmd), &["login"])
+}
+
+pub fn register_cli(cli: UniversalFlags, cmd: RegisterSubcommand) -> anyhow::Result<i32> {
+    execute_cli_with_inherit_stdin(cli, MooncakeSubcommands::Register(cmd), &["register"])
+}
+
+pub fn publish_cli(cli: UniversalFlags, cmd: PublishSubcommand) -> anyhow::Result<i32> {
+    execute_cli(
+        cli,
+        MooncakeSubcommands::Publish(cmd),
+        &["--read-args-from-stdin"],
+    )
+}
diff --git a/crates/moon/src/cli/new.rs b/crates/moon/src/cli/new.rs
new file mode 100644
index 00000000..7558fe9e
--- /dev/null
+++ b/crates/moon/src/cli/new.rs
@@ -0,0 +1,167 @@
+use std::path::PathBuf;
+
+use anyhow::bail;
+use colored::Colorize;
+use moonutil::{common::MOON_MOD_JSON, mooncakes::validate_username};
+
+use super::UniversalFlags;
+
+/// Create a new moonbit package
+#[derive(Debug, clap::Parser)]
+pub struct NewSubcommand {
+    /// The name of the package
+    pub package_name: Option<String>,
+
+    /// Create a library package instead of an executable
+    #[clap(long)]
+    pub lib: bool,
+
+    #[clap(flatten)]
+    pub path_user_name: NewPathUserName,
+
+    /// The license of the package
+    #[clap(long, default_value = "Apache-2.0")]
+    pub license: Option<String>,
+
+    /// Do not set a license for the package
+    #[clap(long)]
+    pub no_license: bool,
+}
+
+#[derive(Debug, Clone, clap::Args)]
+#[group(required(false), requires_all(["path", "user", "name"]))]
+pub struct NewPathUserName {
+    /// Output path of the package
+    #[clap(long)]
+    pub path: Option<PathBuf>,
+
+    /// The user name of the package
+    #[clap(long)]
+    pub user: Option<String>,
+
+    /// The name part of the package
+    #[clap(long)]
+    pub name: Option<String>,
+}
+
+pub fn run_new(_cli: &UniversalFlags, cmd: NewSubcommand) -> anyhow::Result<i32> {
+    if _cli.dry_run {
+        bail!("dry-run is not implemented for new")
+    }
+
+    let mut lib_flag = cmd.lib;
+    let package_name = cmd.package_name.as_ref();
+    let license = if cmd.no_license {
+        None
+    } else {
+        match cmd.license.as_deref() {
+            Some("") => None,
+            Some("\"\"") => None,
+            Some("\'\'") => None,
+            Some(x) => Some(x),
+            _ => None,
+        }
+    };
+
+    if let Some(name) = package_name {
+        let target_dir = PathBuf::from(name);
+        if lib_flag {
+            return moonbuild::new::moon_new_lib(
+                &target_dir,
+                "username".into(),
+                "hello".into(),
+                license,
+            );
+        }
+
+        return moonbuild::new::moon_new_exec(
+            &target_dir,
+            "username".into(),
+            "hello".into(),
+            license,
+        );
+    }
+
+    let NewPathUserName { path, user, name } = cmd.path_user_name;
+
+    ctrlc::set_handler(moonutil::common::dialoguer_ctrlc_handler)?;
+
+    let (target_dir, user, name, license) =
+        if let (Some(path), Some(user), Some(name)) = (path, user, name) {
+            (path, user, name, license.map(|s| s.to_string()))
+        } else {
+            let tmp = dialoguer::Input::<String>::new()
+                .with_prompt("Enter the path to create the project (. for current directory)")
+                .default("my-project".to_string())
+                .show_default(true)
+                .validate_with(|input: &String| -> Result<(), String> {
+                    let p = input.trim();
+                    let dot = p == ".";
+
+                    let p = PathBuf::from(p);
+
+                    if p.exists() {
+                        if p.join(MOON_MOD_JSON).exists() {
+                            Err(format!(
+                                "A MoonBit project already exists in `{}`.",
+                                p.display()
+                            ))
+                        } else {
+                            if !dot {
+                                eprintln!(
+                                    "{}: The directory is already exists.",
+                                    "Warning".yellow().bold(),
+                                );
+                            };
+                            Ok(())
+                        }
+                    } else {
+                        Ok(())
+                    }
+                })
+                .interact()?;
+            let path = PathBuf::from(tmp);
+
+            let items = vec!["exec", "lib"];
+            let selection = dialoguer::Select::new()
+                .with_prompt("Select the create mode")
+                .default(0)
+                .items(&items)
+                .interact()?;
+            lib_flag = selection == 1;
+
+            let username = dialoguer::Input::<String>::new()
+                .with_prompt("Enter your username")
+                .default("username".to_string())
+                .validate_with(|input: &String| -> Result<(), String> { validate_username(input) })
+                .show_default(true)
+                .interact()?;
+
+            let package_name = dialoguer::Input::<String>::new()
+                .with_prompt("Enter your project name")
+                .default("hello".to_string())
+                .show_default(true)
+                .interact()?;
+
+            let license = dialoguer::Input::<String>::new()
+                .with_prompt("Enter your license")
+                .default("Apache-2.0".to_string())
+                .show_default(true)
+                .interact()?;
+
+            (path, username, package_name, Some(license))
+        };
+
+    if target_dir.exists() && target_dir.join(MOON_MOD_JSON).exists() {
+        bail!(
+            "A MoonBit project already exists in `{}`.",
+            target_dir.display()
+        );
+    }
+
+    if !lib_flag {
+        moonbuild::new::moon_new_exec(&target_dir, user, name, license.as_deref())
+    } else {
+        moonbuild::new::moon_new_lib(&target_dir, user, name, license.as_deref())
+    }
+}
diff --git a/crates/moon/src/cli/run.rs b/crates/moon/src/cli/run.rs
new file mode 100644
index 00000000..b67ff6cf
--- /dev/null
+++ b/crates/moon/src/cli/run.rs
@@ -0,0 +1,240 @@
+use std::path::PathBuf;
+
+use anyhow::{bail, Context};
+use moonbuild::dry_run;
+use moonbuild::entry;
+use mooncake::pkg::sync::auto_sync;
+use moonutil::common::lower_surface_targets;
+use moonutil::common::FileLock;
+use moonutil::common::RunMode;
+use moonutil::common::SurfaceTarget;
+use moonutil::common::TargetBackend;
+use moonutil::common::{MoonbuildOpt, OutputFormat};
+use moonutil::dirs::check_moon_pkg_exist;
+use moonutil::dirs::mk_arch_mode_dir;
+use moonutil::dirs::PackageDirs;
+use moonutil::mooncakes::sync::AutoSyncFlags;
+use moonutil::mooncakes::RegistryConfig;
+use n2::trace;
+
+use super::{BuildFlags, UniversalFlags};
+
+/// Run WebAssembly module
+#[derive(Debug, clap::Parser, Clone)]
+pub struct RunSubcommand {
+    /// The package or .mbt file to run
+    pub package_or_mbt_file: String,
+
+    #[clap(flatten)]
+    pub build_flags: BuildFlags,
+
+    #[clap(flatten)]
+    pub auto_sync_flags: AutoSyncFlags,
+
+    pub args: Vec<String>,
+}
+
+pub fn run_run(cli: &UniversalFlags, cmd: RunSubcommand) -> anyhow::Result<i32> {
+    if let Some(surface_targets) = &cmd.build_flags.target {
+        for st in surface_targets.iter() {
+            if *st == SurfaceTarget::All {
+                anyhow::bail!("`--target all` is not supported for `run`");
+            }
+        }
+
+        if surface_targets.len() > 1 {
+            anyhow::bail!("`--target` only supports one target for `run`")
+        }
+
+        let targets = lower_surface_targets(surface_targets);
+        for t in targets {
+            let mut cmd = cmd.clone();
+            cmd.build_flags.target_backend = Some(t);
+            run_run_internal(cli, cmd)?;
+        }
+        Ok(0)
+    } else {
+        run_run_internal(cli, cmd)
+    }
+}
+
+fn run_single_mbt_file(cli: &UniversalFlags, cmd: RunSubcommand) -> anyhow::Result<i32> {
+    let current_dir = std::env::current_dir().unwrap();
+    let mbt_file_path = current_dir.join(cmd.package_or_mbt_file);
+
+    if !mbt_file_path.exists() || !mbt_file_path.is_file() {
+        bail!("{} is not exist or not a file", mbt_file_path.display());
+    }
+
+    let file_name = mbt_file_path.file_stem().unwrap().to_str().unwrap();
+
+    let target_backend = lower_surface_targets(&cmd.build_flags.target.unwrap_or_default())
+        .first()
+        .map_or(TargetBackend::default(), |it| *it);
+    let core_bundle_path = moonutil::moon_dir::core_bundle(target_backend);
+
+    // `parent_path` is not always same with `current_dir`, since `cmd.package_or_mbt_file` can be something like "a/b/c/single.mbt"
+    let parent_path = mbt_file_path.parent().unwrap();
+
+    // we want all output artifacts to be in the same directory as the input single .mbt file
+    let output_core_path = &(parent_path
+        .join(format!("{}.core", file_name))
+        .display()
+        .to_string());
+    let output_wasm_or_js_path = &(parent_path
+        .join(format!("{}.{}", file_name, target_backend.to_extension()))
+        .display()
+        .to_string());
+
+    let build_package_command = [
+        "build-package",
+        &mbt_file_path.display().to_string(),
+        "-o",
+        output_core_path,
+        "-std-path",
+        core_bundle_path.to_str().unwrap(),
+        "-is-main",
+        "-target",
+        target_backend.to_flag(),
+    ];
+    let link_core_command = [
+        "link-core",
+        &core_bundle_path.join("core.core").display().to_string(),
+        &(parent_path
+            .join(format!("{}.core", file_name))
+            .display()
+            .to_string()),
+        "-o",
+        output_wasm_or_js_path,
+        "-target",
+        target_backend.to_flag(),
+    ];
+
+    if cli.dry_run {
+        println!("moonc {}", build_package_command.join(" "));
+        println!("moonc {}", link_core_command.join(" "));
+        let runner = match target_backend {
+            TargetBackend::Wasm | TargetBackend::WasmGC => "moonrun",
+            TargetBackend::Js => "node",
+        };
+        println!("{runner} {output_wasm_or_js_path}");
+
+        return Ok(0);
+    }
+
+    let moonc_build_package = std::process::Command::new("moonc")
+        .args(build_package_command)
+        .stdout(std::process::Stdio::inherit())
+        .stderr(std::process::Stdio::inherit())
+        .spawn()?
+        .wait()?;
+
+    if !moonc_build_package.success() {
+        bail!("failed to run: moonc {}", build_package_command.join(" "))
+    }
+
+    let moonc_link_core = std::process::Command::new("moonc")
+        .args(link_core_command)
+        .stdout(std::process::Stdio::inherit())
+        .stderr(std::process::Stdio::inherit())
+        .spawn()?
+        .wait()?;
+
+    if !moonc_link_core.success() {
+        bail!("failed to run: moonc {}", link_core_command.join(" "))
+    }
+
+    trace::scope("run", || match target_backend {
+        TargetBackend::Wasm | TargetBackend::WasmGC => {
+            moonbuild::build::run_wat(&PathBuf::from(output_wasm_or_js_path), &cmd.args)
+        }
+        TargetBackend::Js => {
+            moonbuild::build::run_js(&PathBuf::from(output_wasm_or_js_path), &cmd.args)
+        }
+    })?;
+
+    Ok(0)
+}
+
+pub fn run_run_internal(cli: &UniversalFlags, cmd: RunSubcommand) -> anyhow::Result<i32> {
+    if cmd.package_or_mbt_file.ends_with(".mbt") {
+        return run_single_mbt_file(cli, cmd);
+    }
+
+    let PackageDirs {
+        source_dir,
+        target_dir,
+    } = cli.source_tgt_dir.try_into_package_dirs()?;
+    let _lock = FileLock::lock(&target_dir)?;
+
+    // Run moon install before build
+    let (resolved_env, dir_sync_result) = auto_sync(
+        &source_dir,
+        &cmd.auto_sync_flags,
+        &RegistryConfig::load(),
+        cli.quiet,
+    )?;
+
+    let mut moonc_opt = super::get_compiler_flags(&source_dir, &cmd.build_flags)?;
+    let run_mode = RunMode::Run;
+    let target_dir = mk_arch_mode_dir(&source_dir, &target_dir, &moonc_opt, run_mode)?;
+
+    if moonc_opt.link_opt.output_format == OutputFormat::Wat {
+        bail!("`--output-wat` is not supported for `run`");
+    }
+
+    let sort_input = cmd.build_flags.sort_input;
+
+    let package_path = cmd.package_or_mbt_file.clone();
+    let package = source_dir.join(&package_path);
+    if !check_moon_pkg_exist(&package) {
+        bail!("{} is not a package", package_path);
+    }
+
+    let pkg = moonutil::common::read_package_desc_file_in_dir(&package)?;
+    if !pkg.is_main {
+        bail!("`{}` is not a main package", package_path);
+    }
+    let moonbuild_opt = MoonbuildOpt {
+        source_dir,
+        target_dir,
+        sort_input,
+        run_mode,
+        args: cmd.args.clone(),
+        quiet: true,
+        verbose: cli.verbose,
+        ..Default::default()
+    };
+
+    let module = moonutil::scan::scan(
+        false,
+        &resolved_env,
+        &dir_sync_result,
+        &moonc_opt,
+        &moonbuild_opt,
+    )?;
+    moonc_opt.build_opt.warn_lists = module
+        .packages
+        .iter()
+        .map(|(name, pkg)| (name.clone(), pkg.warn_list.clone()))
+        .collect();
+    moonc_opt.build_opt.alert_lists = module
+        .packages
+        .iter()
+        .map(|(name, pkg)| (name.clone(), pkg.alert_list.clone()))
+        .collect();
+    if cli.dry_run {
+        return dry_run::print_commands(&module, &moonc_opt, &moonbuild_opt);
+    }
+
+    let trace_flag = cli.trace;
+    if trace_flag {
+        trace::open("trace.json").context("failed to open `trace.json`")?;
+    }
+
+    let result = entry::run_run(Some(&package_path), &moonc_opt, &moonbuild_opt, &module);
+    if trace_flag {
+        trace::close();
+    }
+    result
+}
diff --git a/crates/moon/src/cli/test.rs b/crates/moon/src/cli/test.rs
new file mode 100644
index 00000000..be62e4c8
--- /dev/null
+++ b/crates/moon/src/cli/test.rs
@@ -0,0 +1,351 @@
+use anyhow::Context;
+use colored::Colorize;
+use moonbuild::dry_run;
+use moonbuild::entry;
+use moonbuild::entry::TestFailedStatus;
+use moonbuild::entry::TestResult;
+use mooncake::pkg::sync::auto_sync;
+use moonutil::common::lower_surface_targets;
+use moonutil::common::FileLock;
+use moonutil::common::GeneratedTestDriver;
+use moonutil::common::MooncOpt;
+use moonutil::common::RunMode;
+use moonutil::common::{MoonbuildOpt, TargetBackend, TestOpt};
+use moonutil::dirs::mk_arch_mode_dir;
+use moonutil::dirs::PackageDirs;
+use moonutil::module::ModuleDB;
+use moonutil::mooncakes::sync::AutoSyncFlags;
+use moonutil::mooncakes::RegistryConfig;
+use n2::trace;
+use regex::Regex;
+use std::path::Path;
+use std::path::PathBuf;
+use std::sync::Arc;
+use std::thread;
+
+use super::{BuildFlags, UniversalFlags};
+
+/// Test the current package
+#[derive(Debug, clap::Parser, Clone)]
+pub struct TestSubcommand {
+    #[clap(flatten)]
+    pub build_flags: BuildFlags,
+
+    /// run test at release compiled mode
+    #[clap(long)]
+    pub release: bool,
+
+    /// Run test in the specified package
+    #[clap(short, long, num_args(0..))]
+    pub package: Option<Vec<PathBuf>>,
+
+    /// Run test in the specified file. Only valid when `--package` is also specified.
+    #[clap(short, long, requires("package"))]
+    pub file: Option<String>,
+
+    /// Run only the index-th test in the file. Only valid when `--file` is also specified.
+    #[clap(short, long, requires("file"))]
+    pub index: Option<u32>,
+
+    /// Only build, do not run the tests
+    #[clap(long)]
+    pub build_only: bool,
+
+    /// Update the test snapshot
+    #[clap(short, long)]
+    pub update: bool,
+
+    /// Limit of expect test update passes to run, in order to avoid infinite loops
+    #[clap(short, long, default_value = "256", requires("update"))]
+    pub limit: u32,
+
+    #[clap(flatten)]
+    pub auto_sync_flags: AutoSyncFlags,
+}
+
+pub fn run_test(cli: UniversalFlags, cmd: TestSubcommand) -> anyhow::Result<i32> {
+    let PackageDirs {
+        source_dir,
+        target_dir,
+    } = cli.source_tgt_dir.try_into_package_dirs()?;
+    let _lock = FileLock::lock(&target_dir)?;
+
+    if cmd.build_flags.target.is_none() {
+        return run_test_internal(&cli, &cmd, &source_dir, &target_dir);
+    }
+    let surface_targets = cmd.build_flags.target.clone().unwrap();
+    let targets = lower_surface_targets(&surface_targets);
+    let cli = Arc::new(cli);
+    let source_dir = Arc::new(source_dir);
+    let target_dir = Arc::new(target_dir);
+    let mut handles = Vec::new();
+
+    let mut ret_value = 0;
+    if cmd.build_flags.serial {
+        for t in targets {
+            let mut cmd = cmd.clone();
+            cmd.build_flags.target_backend = Some(t);
+            let x = run_test_internal(&cli, &cmd, &source_dir, &target_dir)?;
+            ret_value = ret_value.max(x);
+        }
+    } else {
+        for t in targets {
+            let cli = Arc::clone(&cli);
+            let mut cmd = cmd.clone();
+            cmd.build_flags.target_backend = Some(t);
+            let source_dir = Arc::clone(&source_dir);
+            let target_dir = Arc::clone(&target_dir);
+
+            let handle =
+                thread::spawn(move || run_test_internal(&cli, &cmd, &source_dir, &target_dir));
+
+            handles.push((t, handle));
+        }
+
+        for (backend, handle) in handles {
+            let x = handle
+                .join()
+                .unwrap()
+                .context(format!("failed to run test for target {:?}", backend))?;
+            ret_value = ret_value.max(x);
+        }
+    }
+    Ok(ret_value)
+}
+
+fn run_test_internal(
+    cli: &UniversalFlags,
+    cmd: &TestSubcommand,
+    source_dir: &Path,
+    target_dir: &Path,
+) -> anyhow::Result<i32> {
+    // Run moon install before build
+    let (resolved_env, dir_sync_result) = auto_sync(
+        source_dir,
+        &cmd.auto_sync_flags,
+        &RegistryConfig::load(),
+        cli.quiet,
+    )?;
+
+    let mut moonc_opt = super::get_compiler_flags(source_dir, &cmd.build_flags)?;
+    // release is 'false' by default, so we will run test at debug mode(to gain more detailed stack trace info), unless `--release` is specified
+    // however, other command like build, check, run, etc, will run at release mode by default
+    moonc_opt.build_opt.debug_flag = !cmd.release;
+    moonc_opt.link_opt.debug_flag = !cmd.release;
+
+    // TODO: remove this when we have a better way to handle this
+    if matches!(moonc_opt.link_opt.target_backend, TargetBackend::Js) {
+        moonc_opt.extra_build_opt.push("-ryu".into());
+        moonc_opt.extra_link_opt.push("-ryu".into());
+    }
+
+    let run_mode = RunMode::Test;
+    let target_dir = mk_arch_mode_dir(source_dir, target_dir, &moonc_opt, run_mode)?;
+
+    if cli.trace {
+        trace::open("trace.json").context("failed to open `trace.json`")?;
+    }
+
+    let verbose = cli.verbose;
+    let build_only = cmd.build_only;
+    let auto_update = cmd.update;
+    let limit = cmd.limit;
+    let sort_input = cmd.build_flags.sort_input;
+
+    let filter_package = cmd.package.clone().map(|it| it.into_iter().collect());
+    let filter_file = &cmd.file;
+    let filter_index = cmd.index;
+    let moonbuild_opt = MoonbuildOpt {
+        source_dir: source_dir.to_path_buf(),
+        target_dir: target_dir.clone(),
+        test_opt: Some(TestOpt {
+            filter_package: filter_package.clone(),
+            filter_file: filter_file.clone(),
+            filter_index,
+        }),
+        sort_input,
+        run_mode,
+        quiet: true,
+        verbose: cli.verbose,
+        ..Default::default()
+    };
+
+    let mut module = moonutil::scan::scan(
+        false,
+        &resolved_env,
+        &dir_sync_result,
+        &moonc_opt,
+        &moonbuild_opt,
+    )?;
+
+    for (pkgname, pkg) in module.packages.iter_mut() {
+        if let Some(ref package) = filter_package {
+            if !package.contains(Path::new(pkgname)) {
+                continue;
+            }
+        }
+
+        // test driver file will be generated via `moon generate-test-driver` command
+        let internal_generated_file = target_dir
+            .join(pkg.rel.fs_full_name())
+            .join("__generated_driver_for_internal_test.mbt");
+        pkg.generated_test_drivers
+            .push(GeneratedTestDriver::InternalTest(internal_generated_file));
+
+        let underscore_generated_file = target_dir
+            .join(pkg.rel.fs_full_name())
+            .join("__generated_driver_for_underscore_test.mbt");
+        pkg.generated_test_drivers
+            .push(GeneratedTestDriver::UnderscoreTest(
+                underscore_generated_file,
+            ));
+
+        let blackbox_generated_file = target_dir
+            .join(pkg.rel.fs_full_name())
+            .join("__generated_driver_for_blackbox_test.mbt");
+        pkg.generated_test_drivers
+            .push(GeneratedTestDriver::BlackboxTest(blackbox_generated_file));
+
+        for file in pkg
+            .files
+            .iter()
+            .chain(pkg.wbtest_files.iter())
+            .chain(pkg.test_files.iter())
+        {
+            let content = std::fs::read_to_string(file)?;
+            let pattern =
+                Regex::new(r#"^test[[:blank:]]*("(?P<name>([^\\"]|\\.)*)")?.*$"#).unwrap();
+
+            let filename = file.file_name().unwrap().to_str().unwrap();
+            if let Some(ref filter_file) = filter_file {
+                if filter_file != filename {
+                    continue;
+                }
+            }
+
+            for line in content.lines() {
+                if pattern.captures(line).is_some() {
+                    pkg.files_contain_test_block.push(file.clone());
+                    break;
+                }
+            }
+        }
+    }
+
+    moonc_opt.build_opt.warn_lists = module
+        .packages
+        .iter()
+        .map(|(name, pkg)| (name.clone(), pkg.warn_list.clone()))
+        .collect();
+    moonc_opt.build_opt.alert_lists = module
+        .packages
+        .iter()
+        .map(|(name, pkg)| (name.clone(), pkg.alert_list.clone()))
+        .collect();
+    if cli.dry_run {
+        return dry_run::print_commands(&module, &moonc_opt, &moonbuild_opt).map(From::from);
+    }
+
+    if cli.trace {
+        trace::close();
+    }
+
+    let result = do_run_test(
+        &moonc_opt,
+        &moonbuild_opt,
+        build_only,
+        auto_update,
+        &module,
+        verbose,
+        limit,
+    );
+    match result {
+        Ok(_) => Ok(0),
+        Err(e) => Ok(e.into()),
+    }
+}
+
+fn do_run_test(
+    moonc_opt: &MooncOpt,
+    moonbuild_opt: &MoonbuildOpt,
+    build_only: bool,
+    auto_update: bool,
+    module: &ModuleDB,
+    verbose: bool,
+    limit: u32,
+) -> anyhow::Result<TestResult, TestFailedStatus> {
+    let result = if !auto_update {
+        entry::run_test(moonc_opt, moonbuild_opt, build_only, verbose, false, module)
+    } else {
+        let mut result =
+            entry::run_test(moonc_opt, moonbuild_opt, build_only, verbose, true, module);
+
+        match result {
+            Err(TestFailedStatus::ExpectTestFailed(_)) => {
+                println!(
+                    "\n{}\n",
+                    "Auto updating expect tests and retesting ...".bold()
+                );
+
+                let (mut should_update, mut count) = (true, 1);
+                while should_update && count < limit {
+                    result = entry::run_test(
+                        moonc_opt,
+                        moonbuild_opt,
+                        build_only,
+                        verbose,
+                        true,
+                        module,
+                    );
+                    match result {
+                        // only continue update when it is a ExpectTestFailed
+                        Err(TestFailedStatus::ExpectTestFailed(_)) => {}
+                        _ => {
+                            should_update = false;
+                        }
+                    }
+                    count += 1;
+                }
+
+                result
+            }
+            _ => result,
+        }
+    };
+
+    print_test_res(&result);
+    result
+}
+
+fn print_test_res(test_res: &anyhow::Result<TestResult, TestFailedStatus>) {
+    let print = |test_res: &TestResult| {
+        let (passed, failed) = (test_res.passed, test_res.failed);
+        println!(
+            "Total tests: {}, passed: {}, failed: {}.",
+            passed + failed,
+            if passed > 0 {
+                passed.to_string().green()
+            } else {
+                passed.to_string().normal()
+            },
+            if failed > 0 {
+                failed.to_string().red()
+            } else {
+                failed.to_string().normal()
+            },
+        );
+    };
+
+    match test_res {
+        Ok(test_res) => {
+            print(test_res);
+        }
+        Err(e) => match e {
+            TestFailedStatus::ApplyExpectFailed(it) => print(it),
+            TestFailedStatus::ExpectTestFailed(it) => print(it),
+            TestFailedStatus::Failed(it) => print(it),
+            TestFailedStatus::RuntimeError(it) => print(it),
+            TestFailedStatus::Others(it) => println!("{}: {:?}", "error".bold().red(), it),
+        },
+    }
+}
diff --git a/crates/moon/src/cli/update.rs b/crates/moon/src/cli/update.rs
new file mode 100644
index 00000000..c251e6d5
--- /dev/null
+++ b/crates/moon/src/cli/update.rs
@@ -0,0 +1,17 @@
+use anyhow::bail;
+use moonutil::mooncakes::RegistryConfig;
+
+use super::UniversalFlags;
+
+/// Update the package registry index
+#[derive(Debug, clap::Parser)]
+pub struct UpdateSubcommand {}
+
+pub fn update_cli(cli: UniversalFlags, _cmd: UpdateSubcommand) -> anyhow::Result<i32> {
+    if cli.dry_run {
+        bail!("dry-run is not implemented for update")
+    }
+    let registry_config = RegistryConfig::load();
+    let target_dir = moonutil::moon_dir::index();
+    mooncake::update::update(&target_dir, &registry_config)
+}
diff --git a/crates/moon/src/cli/upgrade.rs b/crates/moon/src/cli/upgrade.rs
new file mode 100644
index 00000000..14d91346
--- /dev/null
+++ b/crates/moon/src/cli/upgrade.rs
@@ -0,0 +1,10 @@
+use anyhow::bail;
+
+use super::UniversalFlags;
+
+pub fn run_upgrade(cli: UniversalFlags) -> anyhow::Result<i32> {
+    if cli.dry_run {
+        bail!("dry-run is not implemented for upgrade")
+    }
+    moonbuild::upgrade::upgrade()
+}
diff --git a/crates/moon/src/cli/version.rs b/crates/moon/src/cli/version.rs
new file mode 100644
index 00000000..13a718c0
--- /dev/null
+++ b/crates/moon/src/cli/version.rs
@@ -0,0 +1,145 @@
+use std::{env::current_exe, path::Path};
+
+use anyhow::Context;
+use moonutil::common::{get_moon_version, get_moonc_version, get_moonrun_version};
+
+/// Print version info and exit
+#[derive(Debug, clap::Parser)]
+pub struct VersionSubcommand {
+    /// Print all version info
+    #[clap(long)]
+    pub all: bool,
+
+    /// Print version info in JSON format
+    #[clap(long)]
+    pub json: bool,
+
+    /// Do not print the path
+    #[clap(long)]
+    pub no_path: bool,
+}
+
+fn replace_home_with_tilde(p: &Path, h: &Path) -> String {
+    if p.starts_with(h) {
+        p.display()
+            .to_string()
+            .replacen(&h.display().to_string(), "~", 1)
+    } else {
+        p.display().to_string()
+    }
+}
+
+fn get_moon_path() -> anyhow::Result<String> {
+    let user_home = home::home_dir().context("failed to get home directory")?;
+    let moon_path = which::which("moon");
+    let moon_path = if let Ok(moon_path) = moon_path {
+        moon_path
+    } else {
+        current_exe().context("failed to get current executable path")?
+    };
+    Ok(replace_home_with_tilde(&moon_path, &user_home))
+}
+
+fn get_moonc_path() -> anyhow::Result<String> {
+    let moonc_path = which::which("moonc").context("failed to find moonc")?;
+    let user_home = home::home_dir().context("failed to get home directory")?;
+    Ok(replace_home_with_tilde(&moonc_path, &user_home))
+}
+
+fn get_moonrun_path() -> anyhow::Result<String> {
+    let moonrun_path = which::which("moonrun").context("failed to find moonc")?;
+    let user_home = home::home_dir().context("failed to get home directory")?;
+    Ok(replace_home_with_tilde(&moonrun_path, &user_home))
+}
+
+pub fn run_version(cmd: VersionSubcommand) -> anyhow::Result<i32> {
+    let VersionSubcommand {
+        all: all_flag,
+        json: json_flag,
+        no_path: nopath_flag,
+    } = cmd;
+
+    let (moon_version, moonc_version, moonrun_version) = (
+        get_moon_version(),
+        get_moonc_version(),
+        get_moonrun_version(),
+    );
+
+    match (all_flag, json_flag) {
+        (false, false) => {
+            println!("moon {}", moon_version);
+        }
+        (true, false) => {
+            if nopath_flag {
+                println!("moon {}", moon_version);
+                println!("moonc {}", moonc_version);
+                println!("moonc {}", moonrun_version);
+            } else {
+                println!("moon {} {}", moon_version, get_moon_path()?);
+                println!("moonc {} {}", moonc_version, get_moonc_path()?);
+                println!("{} {}", moonrun_version, get_moonrun_path()?);
+            }
+        }
+        (false, true) => {
+            let items = moonutil::common::VersionItems {
+                items: vec![moonutil::common::VersionItem {
+                    name: "moon".to_string(),
+                    version: moon_version,
+                    path: if nopath_flag {
+                        None
+                    } else {
+                        Some(get_moon_path()?)
+                    },
+                }],
+            };
+            println!(
+                "{}",
+                serde_json_lenient::to_string(&items).context(format!(
+                    "failed to serialize version info to JSON: {:#?}",
+                    items
+                ))?
+            );
+        }
+        (true, true) => {
+            let items = moonutil::common::VersionItems {
+                items: vec![
+                    moonutil::common::VersionItem {
+                        name: "moon".to_string(),
+                        version: moon_version,
+                        path: if nopath_flag {
+                            None
+                        } else {
+                            Some(get_moon_path()?)
+                        },
+                    },
+                    moonutil::common::VersionItem {
+                        name: "moonc".to_string(),
+                        version: moonc_version,
+                        path: if nopath_flag {
+                            None
+                        } else {
+                            Some(get_moonc_path()?)
+                        },
+                    },
+                    moonutil::common::VersionItem {
+                        name: "moonrun".to_string(),
+                        version: moonrun_version,
+                        path: if nopath_flag {
+                            None
+                        } else {
+                            Some(get_moonrun_path()?)
+                        },
+                    },
+                ],
+            };
+            println!(
+                "{}",
+                serde_json_lenient::to_string(&items).context(format!(
+                    "failed to serialize version info to JSON: {:#?}",
+                    items
+                ))?
+            );
+        }
+    }
+    Ok(0)
+}
diff --git a/crates/moon/src/main.rs b/crates/moon/src/main.rs
new file mode 100644
index 00000000..45551fb7
--- /dev/null
+++ b/crates/moon/src/main.rs
@@ -0,0 +1,71 @@
+use clap::Parser;
+use cli::MoonBuildSubcommands;
+
+mod cli;
+
+use colored::*;
+
+fn init_log() {
+    use std::io::Write;
+    // usage example: only show debug logs for moonbuild::runtest module
+    // env RUST_LOG=moonbuild::runtest=debug cargo run -- test --source-dir ./tests/test_cases/moon_new.in
+
+    // log level: error > warn > info > debug > trace
+    env_logger::Builder::from_env(env_logger::Env::default())
+        .target(env_logger::Target::Stdout)
+        .format(|buf, record| {
+            let level_style = buf.default_level_style(record.level());
+            writeln!(
+                buf,
+                "{} [{}] [{}:{}] {}",
+                level_style.value(record.level()),
+                chrono::Local::now().format("%Y-%m-%dT%H:%M:%S"),
+                record.file().unwrap_or("unknown"),
+                record.line().unwrap_or(0),
+                record.args()
+            )
+        })
+        .init();
+}
+
+pub fn main() {
+    init_log();
+    match main1() {
+        Ok(code) => std::process::exit(code),
+        Err(e) => {
+            eprintln!("{}: {:?}", "error".red().bold(), e);
+            std::process::exit(-1);
+        }
+    }
+}
+
+fn main1() -> anyhow::Result<i32> {
+    let cli = cli::MoonBuildCli::parse();
+    let flags = cli.flags;
+    use MoonBuildSubcommands::*;
+    match cli.subcommand {
+        Add(a) => cli::add_cli(flags, a),
+        Build(b) => cli::run_build(&flags, &b),
+        Bundle(b) => cli::run_bundle(flags, b),
+        Check(c) => cli::run_check(&flags, &c),
+        Clean(_) => cli::run_clean(&flags),
+        Coverage(c) => cli::run_coverage(flags, c),
+        Doc(d) => cli::run_doc(flags, d),
+        Fmt(f) => cli::run_fmt(&flags, f),
+        GenerateBuildMatrix(b) => cli::generate_build_matrix(&flags, b),
+        GenerateTestDriver(g) => cli::generate_test_driver(flags, g),
+        Info(i) => cli::run_info(flags, i),
+        Install(i) => cli::install_cli(flags, i),
+        Login(l) => cli::mooncake_adapter::login_cli(flags, l),
+        New(n) => cli::run_new(&flags, n),
+        Publish(p) => cli::mooncake_adapter::publish_cli(flags, p),
+        Register(r) => cli::mooncake_adapter::register_cli(flags, r),
+        Remove(r) => cli::remove_cli(flags, r),
+        Run(r) => cli::run_run(&flags, r),
+        Test(t) => cli::run_test(flags, t),
+        Tree(t) => cli::tree_cli(flags, t),
+        Update(u) => cli::update_cli(flags, u),
+        Upgrade => cli::run_upgrade(flags),
+        Version(v) => cli::run_version(v),
+    }
+}
diff --git a/crates/moon/tests/mod.rs b/crates/moon/tests/mod.rs
new file mode 100644
index 00000000..8dc4b972
--- /dev/null
+++ b/crates/moon/tests/mod.rs
@@ -0,0 +1,202 @@
+mod test_cases;
+
+use expect_test::Expect;
+use std::path::{Path, PathBuf};
+
+fn check(actual: &str, expect: Expect) {
+    expect.assert_eq(actual)
+}
+
+struct TestDir {
+    // tempfile::TempDir has a drop implementation that will remove the directory
+    // copy the test directory to a temporary directory to abvoid conflict with other tests when `cargo test` parallelly testing
+    path: tempfile::TempDir,
+}
+
+impl TestDir {
+    // create a new TestDir with the test directory in tests/test_cases/<sub>
+    fn new(sub: &str) -> Self {
+        let dir = PathBuf::from(env!("CARGO_MANIFEST_DIR"))
+            .join("tests/test_cases")
+            .join(sub);
+        let tmp_dir = tempfile::TempDir::new().unwrap();
+        copy(&dir, tmp_dir.path()).unwrap();
+        Self { path: tmp_dir }
+    }
+
+    // create a empty TestDir
+    fn new_empty() -> Self {
+        let tmp_dir = tempfile::TempDir::new().unwrap();
+        Self { path: tmp_dir }
+    }
+
+    fn join(&self, sub: impl AsRef<str>) -> PathBuf {
+        self.path.path().join(sub.as_ref())
+    }
+}
+
+impl AsRef<Path> for TestDir {
+    fn as_ref(&self) -> &Path {
+        self.path.path()
+    }
+}
+
+pub fn moon_bin() -> PathBuf {
+    snapbox::cmd::cargo_bin("moon")
+}
+
+#[track_caller]
+pub fn get_stdout_with_args_without_replace(
+    dir: &impl AsRef<std::path::Path>,
+    args: impl IntoIterator<Item = impl AsRef<std::ffi::OsStr>>,
+) -> String {
+    let out = snapbox::cmd::Command::new(moon_bin())
+        .current_dir(dir)
+        .args(args)
+        .assert()
+        .success()
+        .get_output()
+        .stdout
+        .to_owned();
+
+    let s = std::str::from_utf8(&out).unwrap().to_string();
+    s
+}
+
+pub fn get_stderr_with_args_without_replace(
+    dir: &impl AsRef<std::path::Path>,
+    args: impl IntoIterator<Item = impl AsRef<std::ffi::OsStr>>,
+) -> String {
+    let out = snapbox::cmd::Command::new(moon_bin())
+        .current_dir(dir)
+        .args(args)
+        .assert()
+        .failure()
+        .get_output()
+        .stderr
+        .to_owned();
+
+    let s = std::str::from_utf8(&out).unwrap().to_string();
+    s
+}
+
+#[track_caller]
+pub fn get_stdout_with_args(
+    dir: &impl AsRef<std::path::Path>,
+    args: impl IntoIterator<Item = impl AsRef<std::ffi::OsStr>>,
+) -> String {
+    let s = get_stdout_with_args_without_replace(dir, args);
+    let s = s.replace("\r\n", "\n");
+
+    s.replace('\\', "/")
+}
+
+pub fn replace_dir(s: &str, dir: &impl AsRef<std::path::Path>) -> String {
+    let path_str1 = dunce::canonicalize(dir)
+        .unwrap()
+        .to_str()
+        .unwrap()
+        .to_string();
+    println!("path_str1: {:?}", path_str1);
+    let s = s.replace("\\\\", "\\");
+    println!("s: {:?}", s);
+    let s = s.replace(&path_str1, "$ROOT");
+    let s = s.replace(
+        dunce::canonicalize(moonutil::moon_dir::home())
+            .unwrap()
+            .to_str()
+            .unwrap(),
+        "$MOON_HOME",
+    );
+    let s = s.replace(moon_bin().to_string_lossy().as_ref(), "moon");
+    s.replace("\r\n", "\n").replace('\\', "/")
+}
+
+#[track_caller]
+pub fn get_stdout_with_args_and_replace_dir(
+    dir: &impl AsRef<std::path::Path>,
+    args: impl IntoIterator<Item = impl AsRef<std::ffi::OsStr>>,
+) -> String {
+    let s = get_stdout_with_args_without_replace(dir, args);
+    replace_dir(&s, dir)
+}
+
+pub fn get_stderr_with_args_and_replace_dir(
+    dir: &impl AsRef<std::path::Path>,
+    args: impl IntoIterator<Item = impl AsRef<std::ffi::OsStr>>,
+) -> String {
+    let s = get_stderr_with_args_without_replace(dir, args);
+    replace_dir(&s, dir)
+}
+
+pub fn get_stderr_with_args(
+    dir: &impl AsRef<std::path::Path>,
+    args: impl IntoIterator<Item = impl AsRef<std::ffi::OsStr>>,
+) -> String {
+    let out = snapbox::cmd::Command::new(moon_bin())
+        .current_dir(dir)
+        .args(args)
+        .assert()
+        .failure()
+        .get_output()
+        .stderr
+        .to_owned();
+
+    let s = std::str::from_utf8(&out).unwrap().to_string();
+    let s = s.replace("\r\n", "\n");
+
+    s.replace('\\', "/")
+}
+
+pub fn copy(src: &Path, dest: &Path) -> anyhow::Result<()> {
+    if src.is_dir() {
+        if !dest.exists() {
+            std::fs::create_dir_all(dest)?;
+        }
+        for entry in walkdir::WalkDir::new(src) {
+            let entry = entry?;
+            let path = entry.path();
+            let relative_path = path.strip_prefix(src)?;
+            let dest_path = dest.join(relative_path);
+            if path.is_dir() {
+                if !dest_path.exists() {
+                    std::fs::create_dir_all(dest_path)?;
+                }
+            } else {
+                std::fs::copy(path, dest_path)?;
+            }
+        }
+    } else {
+        std::fs::copy(src, dest)?;
+    }
+    Ok(())
+}
+
+pub fn replace_crlf_to_lf(s: &str) -> String {
+    s.replace("\r\n", "\n")
+}
+
+pub fn get_err_stdout_with_args_without_replace(
+    dir: &impl AsRef<std::path::Path>,
+    args: impl IntoIterator<Item = impl AsRef<std::ffi::OsStr>>,
+) -> String {
+    let out = snapbox::cmd::Command::new(moon_bin())
+        .current_dir(dir)
+        .args(args)
+        .assert()
+        .failure()
+        .get_output()
+        .stdout
+        .to_owned();
+
+    let s = std::str::from_utf8(&out).unwrap().to_string();
+    s
+}
+
+pub fn get_err_stdout_with_args_and_replace_dir(
+    dir: &impl AsRef<std::path::Path>,
+    args: impl IntoIterator<Item = impl AsRef<std::ffi::OsStr>>,
+) -> String {
+    let s = get_err_stdout_with_args_without_replace(dir, args);
+    replace_dir(&s, dir)
+}
diff --git a/crates/moon/tests/test_cases/alert_list.in/.gitignore b/crates/moon/tests/test_cases/alert_list.in/.gitignore
new file mode 100644
index 00000000..b1283a74
--- /dev/null
+++ b/crates/moon/tests/test_cases/alert_list.in/.gitignore
@@ -0,0 +1,2 @@
+target/
+.mooncakes/
diff --git a/crates/moon/tests/test_cases/alert_list.in/README.md b/crates/moon/tests/test_cases/alert_list.in/README.md
new file mode 100644
index 00000000..ae00983f
--- /dev/null
+++ b/crates/moon/tests/test_cases/alert_list.in/README.md
@@ -0,0 +1 @@
+# username/hello
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/alert_list.in/lib/hello.mbt b/crates/moon/tests/test_cases/alert_list.in/lib/hello.mbt
new file mode 100644
index 00000000..5e981944
--- /dev/null
+++ b/crates/moon/tests/test_cases/alert_list.in/lib/hello.mbt
@@ -0,0 +1,12 @@
+test {
+  alert_1();
+  alert_2();
+}
+
+/// @alert alert_1 "alert_1"
+fn alert_1() -> Unit {
+}
+
+/// @alert alert_2 "alert_2"
+fn alert_2() -> Unit {
+}
diff --git a/crates/moon/tests/test_cases/alert_list.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/alert_list.in/lib/moon.pkg.json
new file mode 100644
index 00000000..ce726eea
--- /dev/null
+++ b/crates/moon/tests/test_cases/alert_list.in/lib/moon.pkg.json
@@ -0,0 +1,4 @@
+{
+  "warn-list": "-2",
+  "alert-list": "-alert_1-alert_2"
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/alert_list.in/main/main.mbt b/crates/moon/tests/test_cases/alert_list.in/main/main.mbt
new file mode 100644
index 00000000..d7b32586
--- /dev/null
+++ b/crates/moon/tests/test_cases/alert_list.in/main/main.mbt
@@ -0,0 +1,13 @@
+fn main {
+  alert_1();
+  alert_2();
+}
+
+/// @alert alert_1 "alert_1"
+fn alert_1() -> Unit {
+}
+
+/// @alert alert_2 "alert_2"
+fn alert_2() -> Unit {
+  let a = 0
+}
diff --git a/crates/moon/tests/test_cases/alert_list.in/main/moon.pkg.json b/crates/moon/tests/test_cases/alert_list.in/main/moon.pkg.json
new file mode 100644
index 00000000..2b877d8e
--- /dev/null
+++ b/crates/moon/tests/test_cases/alert_list.in/main/moon.pkg.json
@@ -0,0 +1,8 @@
+{
+  "is-main": true,
+  "import": [
+    "username/hello/lib"
+  ],
+  "warn-list": "-1-2",
+  "alert-list": "-alert_1"
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/alert_list.in/moon.mod.json b/crates/moon/tests/test_cases/alert_list.in/moon.mod.json
new file mode 100644
index 00000000..80554ae2
--- /dev/null
+++ b/crates/moon/tests/test_cases/alert_list.in/moon.mod.json
@@ -0,0 +1,9 @@
+{
+  "name": "username/hello",
+  "version": "0.1.0",
+  "readme": "README.md",
+  "repository": "",
+  "license": "",
+  "keywords": [],
+  "description": ""
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/avl_tree.in/README.md b/crates/moon/tests/test_cases/avl_tree.in/README.md
new file mode 100644
index 00000000..ec641411
--- /dev/null
+++ b/crates/moon/tests/test_cases/avl_tree.in/README.md
@@ -0,0 +1,3 @@
+## AVL tree
+
+Use Moonbit to implement an [AVL tree](https://en.wikipedia.org/wiki/AVL_tree), with printer to show its internal.
diff --git a/crates/moon/tests/test_cases/avl_tree.in/lib/avl.mbt b/crates/moon/tests/test_cases/avl_tree.in/lib/avl.mbt
new file mode 100644
index 00000000..caf29310
--- /dev/null
+++ b/crates/moon/tests/test_cases/avl_tree.in/lib/avl.mbt
@@ -0,0 +1,254 @@
+// https://en.wikipedia.org/wiki/AVL_tree
+// https://zhuanlan.zhihu.com/p/430867594
+
+// Empty represents an empty node in the AVL tree
+// Node represents a node in the AVL tree with left child, value, right child, and height
+pub enum T[U] {
+  Empty
+  Node(T[U], U, T[U], Int)
+}
+
+/// Calculate the height of a tree-like structure using pattern matching.
+///
+/// This function calculates the height of a tree-like structure represented by the
+/// user-defined enum 'T[U]' using pattern matching. The height of an empty tree is 0,
+/// and the height of a non-empty tree node is determined by its stored height value.
+///
+/// @param {T[U]} self - A user-defined enum representing the tree-like structure.
+/// @return {Int} The height of the tree-like structure.
+
+pub fn height[U](self : T[U]) -> Int {
+  match self {
+    Empty => 0
+    Node(_, _, _, h) => h
+  }
+}
+
+/// Create a new node with the given left and right subtrees, along with a value of type 'U'.
+///
+/// This function constructs a new node of the user-defined enum type 'T[U]' using the provided left subtree 'l',
+/// value 'v', and right subtree 'r'. The height of the node is determined by the maximum height between
+/// the left and right subtrees, incremented by one.
+///
+/// @param {T[U]} l - The left subtree of the node.
+/// @param {U} v - The value to be stored in the node.
+/// @param {T[U]} r - The right subtree of the node.
+/// @return {T[U]} - A new node of type 'T[U]' with the specified left subtree, value, and right subtree.
+fn create[U](l : T[U], v : U, r : T[U]) -> T[U] {
+  let hl = l.height()
+  let hr = r.height()
+  Node(l, v, r, if hl >= hr { hl + 1 } else { hr + 1 })
+}
+
+/// Perform balancing operation on a avl tree node.
+///
+/// This function performs a balancing operation on a avl tree node based on the heights
+/// of its left and right subtrees. It ensures that the heights of the subtrees are balanced
+/// and returns a new avl tree node with appropriate restructuring if necessary.
+///
+/// @param {T[U]} l - The left subtree of the node.
+/// @param {U} v - The value of the node.
+/// @param {T[U]} r - The right subtree of the node.
+/// @return {T[U]} - A new avl tree node after balancing.
+fn bal[U](l : T[U], v : U, r : T[U]) -> T[U] {
+  let hl = l.height()
+  let hr = r.height()
+
+  // Left subtree is taller by more than 2 level
+  if hl > hr + 2 {
+    match l {
+      Empty => Empty // impossible
+      Node(ll, lv, lr, _) =>
+        if ll.height() >= lr.height() {
+          create(ll, lv, create(lr, v, r))
+        } else {
+          match lr {
+            Empty => Empty // impossible
+            Node(lrl, lrv, lrr, _) =>
+              create(create(ll, lv, lrl), lrv, create(lrr, v, r))
+          }
+        }
+    }
+  } else if hr > hl + 2 {
+    // Right subtree is taller by more than 2 level
+    match r {
+      Empty => Empty // impossible
+      Node(rl, rv, rr, _) =>
+        if rr.height() >= rl.height() {
+          create(create(l, v, rl), rv, rr)
+        } else {
+          match rl {
+            Empty => Empty // impossible
+            Node(rll, rlv, rlr, _) =>
+              create(create(l, v, rll), rlv, create(rlr, rv, rr))
+          }
+        }
+    }
+  } else {
+    Node(l, v, r, if hl >= hr { hl + 1 } else { hr + 1 })
+  }
+}
+
+/// Adds a value to a tree node and performs balancing.
+///
+/// This function adds a value 'x' to the given tree node 'self' of type 'T[U]'. The tree
+/// node is expected to be of an enumerated type 'T', and the value type 'U' should implement
+/// the 'Compare' interface for comparison.
+///
+/// @param {T[U]} self - The tree node of type 'T[U]' to which the value will be added.
+/// @param {U} x - The value of type 'U' to be added to the tree node.
+/// @return {T[U]} A balanced tree node of type 'T[U]' after adding the value.
+pub fn add[U : Compare](self : T[U], x : U) -> T[U] {
+  match self {
+    Empty => Node(Empty, x, Empty, 1)
+    Node(l, v, r, _) as t => {
+      let c = x.compare(v)
+      if c == 0 {
+        t
+      } else if c < 0 {
+        bal(l.add(x), v, r)
+      } else {
+        bal(l, v, r.add(x))
+      }
+    }
+  }
+}
+
+/// Find the minimum element in a tree-like data structure.
+///
+/// This function operates on a tree-like data structure of type 'T[U]', where 'U' is a type parameter representing
+/// the element type. The function recursively
+/// navigates the tree using pattern matching to find the minimum element.
+///
+/// @param {T[U]} 'self' - The tree-like data structure on which to find the minimum element.
+/// @param {U} 'default' - The default value to return if the tree is empty.
+/// @return {U} The minimum element found in the tree, or the 'default' value if the tree is empty.
+fn min_elt[U](self : T[U], default : U) -> U {
+  match self {
+    Empty => default
+    Node(Empty, v, _, _) => v
+    Node(l, v, _, _) => l.min_elt(v)
+  }
+}
+
+/// Remove the minimum element from a avl tree and rebalance the tree.
+///
+/// This function takes a avl tree 'l' of type 'T[U]', an element 'v' of type 'U' to be removed,
+/// and another avl tree 'r' of type 'T[U]'. It removes the minimum element from the tree 'l',
+/// and then rebalances the resulting tree using the 'bal' function.
+///
+/// @param {T[U]} l - A avl tree from which the minimum element is to be removed.
+/// @param {U} v - An element of type 'U' to be removed from the tree.
+/// @param {T[U]} r - Another avl tree to be combined with the modified 'l' after removal.
+/// @return {T[U]} A avl tree resulting from the removal of the minimum element and rebalancing.
+fn remove_min_elt[U](l : T[U], v : U, r : T[U]) -> T[U] {
+  match l {
+    Empty => r
+    Node(ll, lv, lr, _) => bal(remove_min_elt(ll, lv, lr), v, r)
+  }
+}
+
+/// Merge two AVL trees of the same user-defined type 'U' into a new AVL tree.
+///
+/// This function takes two AVL trees 'self' and 'other' of type 'T[U]' and merges them into a new AVL tree.
+/// The result of the merge is a balanced AVL tree that contains all the elements from both input trees while
+/// maintaining the AVL tree properties.
+///
+/// @param {T[U]} self - The first AVL tree to merge.
+/// @param {T[U]} other - The second AVL tree to merge.
+/// @return {T[U]} A new AVL tree containing elements from both input trees, balanced to maintain AVL properties.
+fn internal_merge[U](self : T[U], other : T[U]) -> T[U] {
+  match (self, other) {
+    (Empty, t) => t
+    (t, Empty) => t
+    (_, Node(rl, rv, rr, _)) =>
+      bal(self, other.min_elt(rv), remove_min_elt(rl, rv, rr))
+  }
+}
+
+/// Removes a value from the AVL tree while maintaining balance.
+///
+/// This function removes a value from the AVL tree while ensuring that the resulting tree
+/// remains balanced according to the AVL tree balancing rules. The type 'U' represents
+/// the type of values in the tree and must implement the 'Compare' interface for comparison.
+///
+/// @param {T[U]} self - The AVL tree from which to remove the value.
+/// @param {U} x - The value to be removed from the AVL tree.
+/// @return {T[U]} - A new AVL tree with the specified value removed, maintaining balance.
+pub fn remove[U : Compare](self : T[U], x : U) -> T[U] {
+  match self {
+    Empty => Empty
+    Node(l, v, r, _) => {
+      let c = x.compare(v)
+      if c == 0 {
+        l.internal_merge(r)
+      } else if c < 0 {
+        bal(l.remove(x), v, r)
+      } else {
+        bal(l, v, r.remove(x))
+      }
+    }
+  }
+}
+
+/// Repeat a given string a specified number of times.
+///
+/// This function takes a string 's' and an integer 'n' as input and returns a new string
+/// containing the original string repeated 'n' times.
+///
+/// @param {String} s - The string to be repeated.
+/// @param {Int} n - The number of times to repeat the string.
+/// @return {String} A new string containing 's' repeated 'n' times.
+fn repeat_str(s : String, n : Int) -> String {
+  let mut result = ""
+  let mut i = 0
+  while i < n {
+    result = result + s
+    i = i + 1
+  }
+  result
+}
+
+/// Print the AVL tree
+///
+/// This function prints the AVL tree by traversing it in an in-order manner and displaying
+/// the nodes at each level with appropriate indentation.
+///
+/// The value type 'U' should implement the 'to_string' interface for 'Show'.
+///
+/// @param {T[U]} self - The AVL tree to be printed.
+pub fn print_tree[U : Show](self : T[U]) -> Unit {
+  fn helper(node : T[U], level : Int) {
+    match node {
+      Empty => ()
+      Node(l, v, r, _) => {
+        helper(l, level + 1)
+        let indent = repeat_str("  ", level)
+        println(indent + v.to_string())
+        helper(r, level + 1)
+      }
+    }
+  }
+
+  helper(self, 0)
+}
+
+/// Check if a given element exists in an AVL tree.
+///
+/// This function checks whether a specified element 'x' exists in the AVL tree.
+/// Type 'U' must implement the 'Compare' interface. The function
+/// recursively searches the tree's nodes for the given element.
+///
+/// @param {T[U]} self - An AVL tree of type 'T' with elements of type 'U'.
+/// @param {U} x - The element to search for in the AVL tree.
+/// @return {Bool} - 'true' if the element exists in the tree, 'false' otherwise.
+pub fn mem[U : Compare](self : T[U], x : U) -> Bool {
+  match self {
+    Empty => false
+    Node(l, v, r, _) => {
+      let c = x.compare(v)
+      let tree = if c < 0 { l } else { r }
+      c == 0 || tree.mem(x)
+    }
+  }
+}
diff --git a/crates/moon/tests/test_cases/avl_tree.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/avl_tree.in/lib/moon.pkg.json
new file mode 100644
index 00000000..9585a087
--- /dev/null
+++ b/crates/moon/tests/test_cases/avl_tree.in/lib/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
diff --git a/crates/moon/tests/test_cases/avl_tree.in/main/main.mbt b/crates/moon/tests/test_cases/avl_tree.in/main/main.mbt
new file mode 100644
index 00000000..1c9871dc
--- /dev/null
+++ b/crates/moon/tests/test_cases/avl_tree.in/main/main.mbt
@@ -0,0 +1,36 @@
+fn main {
+  let mut v : @lib.T[Int] = Empty // Create an empty AVL tree with Int type
+  let iter = 30
+
+  // Add values from 0 to iter-1 to the AVL tree
+  let mut i = 0
+  while i < iter {
+    v = v.add(i)
+    i = i + 1
+  }
+  let height = v.height()
+  println("height of the tree: \(height)")
+  v.print_tree()
+
+  // Check values from 0 to iter-1 in the AVL tree
+  let mut j = 0
+  while j < iter {
+    if not(v.mem(j)) {
+      println("impossible")
+    }
+    j = j + 1
+  }
+
+  // Remove values from 0 to iter-1 from the AVL tree
+  let mut k = 0
+  while k < iter {
+    v = v.remove(k)
+    k = k + 1
+  }
+
+  // Tree is empty, removal successful
+  match v {
+    Empty => println("success")
+    Node(_) => println("impossible")
+  }
+}
diff --git a/crates/moon/tests/test_cases/avl_tree.in/main/moon.pkg.json b/crates/moon/tests/test_cases/avl_tree.in/main/moon.pkg.json
new file mode 100644
index 00000000..9732c503
--- /dev/null
+++ b/crates/moon/tests/test_cases/avl_tree.in/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": {
+    "avl_tree/lib": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/avl_tree.in/moon.mod.json b/crates/moon/tests/test_cases/avl_tree.in/moon.mod.json
new file mode 100644
index 00000000..bbd425d3
--- /dev/null
+++ b/crates/moon/tests/test_cases/avl_tree.in/moon.mod.json
@@ -0,0 +1,3 @@
+{
+  "name": "avl_tree"
+}
diff --git a/crates/moon/tests/test_cases/backend-flag.in/.gitignore b/crates/moon/tests/test_cases/backend-flag.in/.gitignore
new file mode 100644
index 00000000..b1283a74
--- /dev/null
+++ b/crates/moon/tests/test_cases/backend-flag.in/.gitignore
@@ -0,0 +1,2 @@
+target/
+.mooncakes/
diff --git a/crates/moon/tests/test_cases/backend-flag.in/README.md b/crates/moon/tests/test_cases/backend-flag.in/README.md
new file mode 100644
index 00000000..ae00983f
--- /dev/null
+++ b/crates/moon/tests/test_cases/backend-flag.in/README.md
@@ -0,0 +1 @@
+# username/hello
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/backend-flag.in/lib/hello.mbt b/crates/moon/tests/test_cases/backend-flag.in/lib/hello.mbt
new file mode 100644
index 00000000..9012592a
--- /dev/null
+++ b/crates/moon/tests/test_cases/backend-flag.in/lib/hello.mbt
@@ -0,0 +1,3 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
diff --git a/crates/moon/tests/test_cases/backend-flag.in/lib/hello_wbtest.mbt b/crates/moon/tests/test_cases/backend-flag.in/lib/hello_wbtest.mbt
new file mode 100644
index 00000000..64f26429
--- /dev/null
+++ b/crates/moon/tests/test_cases/backend-flag.in/lib/hello_wbtest.mbt
@@ -0,0 +1,5 @@
+test "hello" {
+  if hello() != "Hello, world!" {
+    return Err("hello() != \"Hello, world!\"")
+  }
+}
diff --git a/crates/moon/tests/test_cases/backend-flag.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/backend-flag.in/lib/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/backend-flag.in/lib/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/backend-flag.in/main/main.mbt b/crates/moon/tests/test_cases/backend-flag.in/main/main.mbt
new file mode 100644
index 00000000..d25cb935
--- /dev/null
+++ b/crates/moon/tests/test_cases/backend-flag.in/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println(@lib.hello())
+}
diff --git a/crates/moon/tests/test_cases/backend-flag.in/main/moon.pkg.json b/crates/moon/tests/test_cases/backend-flag.in/main/moon.pkg.json
new file mode 100644
index 00000000..48783525
--- /dev/null
+++ b/crates/moon/tests/test_cases/backend-flag.in/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": [
+    "username/hello/lib"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/backend-flag.in/moon.mod.json b/crates/moon/tests/test_cases/backend-flag.in/moon.mod.json
new file mode 100644
index 00000000..5e09be76
--- /dev/null
+++ b/crates/moon/tests/test_cases/backend-flag.in/moon.mod.json
@@ -0,0 +1,10 @@
+{
+  "name": "username/hello",
+  "version": "0.1.0",
+  "readme": "README.md",
+  "repository": "",
+  "license": "",
+  "keywords": [],
+  "description": "",
+  "_backend": "js"
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/backend_config.in/.gitignore b/crates/moon/tests/test_cases/backend_config.in/.gitignore
new file mode 100644
index 00000000..b1283a74
--- /dev/null
+++ b/crates/moon/tests/test_cases/backend_config.in/.gitignore
@@ -0,0 +1,2 @@
+target/
+.mooncakes/
diff --git a/crates/moon/tests/test_cases/backend_config.in/README.md b/crates/moon/tests/test_cases/backend_config.in/README.md
new file mode 100644
index 00000000..ae00983f
--- /dev/null
+++ b/crates/moon/tests/test_cases/backend_config.in/README.md
@@ -0,0 +1 @@
+# username/hello
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/backend_config.in/lib/hello.mbt b/crates/moon/tests/test_cases/backend_config.in/lib/hello.mbt
new file mode 100644
index 00000000..87ad9507
--- /dev/null
+++ b/crates/moon/tests/test_cases/backend_config.in/lib/hello.mbt
@@ -0,0 +1,7 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
+
+pub fn foo() -> String {
+  "foo"
+}
diff --git a/crates/moon/tests/test_cases/backend_config.in/lib/hello_wbtest.mbt b/crates/moon/tests/test_cases/backend_config.in/lib/hello_wbtest.mbt
new file mode 100644
index 00000000..64f26429
--- /dev/null
+++ b/crates/moon/tests/test_cases/backend_config.in/lib/hello_wbtest.mbt
@@ -0,0 +1,5 @@
+test "hello" {
+  if hello() != "Hello, world!" {
+    return Err("hello() != \"Hello, world!\"")
+  }
+}
diff --git a/crates/moon/tests/test_cases/backend_config.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/backend_config.in/lib/moon.pkg.json
new file mode 100644
index 00000000..1e87f8d9
--- /dev/null
+++ b/crates/moon/tests/test_cases/backend_config.in/lib/moon.pkg.json
@@ -0,0 +1,20 @@
+{
+  "link": {
+    "wasm": {
+      "exports": [
+        "hello:hello_wasm",
+        "foo:bar"
+      ]
+    },
+    "wasm-gc": {
+      "exports": [
+        "hello:hello_wasm_gc"
+      ]
+    },
+    "js": {
+      "exports": [
+        "hello:hello_js"
+      ]
+    }
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/backend_config.in/main/main.mbt b/crates/moon/tests/test_cases/backend_config.in/main/main.mbt
new file mode 100644
index 00000000..d25cb935
--- /dev/null
+++ b/crates/moon/tests/test_cases/backend_config.in/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println(@lib.hello())
+}
diff --git a/crates/moon/tests/test_cases/backend_config.in/main/moon.pkg.json b/crates/moon/tests/test_cases/backend_config.in/main/moon.pkg.json
new file mode 100644
index 00000000..48783525
--- /dev/null
+++ b/crates/moon/tests/test_cases/backend_config.in/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": [
+    "username/hello/lib"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/backend_config.in/moon.mod.json b/crates/moon/tests/test_cases/backend_config.in/moon.mod.json
new file mode 100644
index 00000000..80554ae2
--- /dev/null
+++ b/crates/moon/tests/test_cases/backend_config.in/moon.mod.json
@@ -0,0 +1,9 @@
+{
+  "name": "username/hello",
+  "version": "0.1.0",
+  "readme": "README.md",
+  "repository": "",
+  "license": "",
+  "keywords": [],
+  "description": ""
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/backtrace.in/.gitignore b/crates/moon/tests/test_cases/backtrace.in/.gitignore
new file mode 100644
index 00000000..b1283a74
--- /dev/null
+++ b/crates/moon/tests/test_cases/backtrace.in/.gitignore
@@ -0,0 +1,2 @@
+target/
+.mooncakes/
diff --git a/crates/moon/tests/test_cases/backtrace.in/README.md b/crates/moon/tests/test_cases/backtrace.in/README.md
new file mode 100644
index 00000000..ae00983f
--- /dev/null
+++ b/crates/moon/tests/test_cases/backtrace.in/README.md
@@ -0,0 +1 @@
+# username/hello
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/backtrace.in/main/main.mbt b/crates/moon/tests/test_cases/backtrace.in/main/main.mbt
new file mode 100644
index 00000000..fa07ef97
--- /dev/null
+++ b/crates/moon/tests/test_cases/backtrace.in/main/main.mbt
@@ -0,0 +1,11 @@
+fn foo() -> Unit {
+  abort("hah")
+}
+
+fn bar() -> Unit {
+  foo()
+}
+
+fn main {
+  bar()
+}
diff --git a/crates/moon/tests/test_cases/backtrace.in/main/moon.pkg.json b/crates/moon/tests/test_cases/backtrace.in/main/moon.pkg.json
new file mode 100644
index 00000000..fcc86bad
--- /dev/null
+++ b/crates/moon/tests/test_cases/backtrace.in/main/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "is-main": true
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/backtrace.in/moon.mod.json b/crates/moon/tests/test_cases/backtrace.in/moon.mod.json
new file mode 100644
index 00000000..80554ae2
--- /dev/null
+++ b/crates/moon/tests/test_cases/backtrace.in/moon.mod.json
@@ -0,0 +1,9 @@
+{
+  "name": "username/hello",
+  "version": "0.1.0",
+  "readme": "README.md",
+  "repository": "",
+  "license": "",
+  "keywords": [],
+  "description": ""
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/bench2_test.in/dir_0_0/m_0_0_0_0/main.mbt b/crates/moon/tests/test_cases/bench2_test.in/dir_0_0/m_0_0_0_0/main.mbt
new file mode 100644
index 00000000..2fef350e
--- /dev/null
+++ b/crates/moon/tests/test_cases/bench2_test.in/dir_0_0/m_0_0_0_0/main.mbt
@@ -0,0 +1,3 @@
+// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX //
+pub fn f() -> Unit {
+}
diff --git a/crates/moon/tests/test_cases/bench2_test.in/dir_0_0/m_0_0_0_0/moon.pkg.json b/crates/moon/tests/test_cases/bench2_test.in/dir_0_0/m_0_0_0_0/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/bench2_test.in/dir_0_0/m_0_0_0_0/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/bench2_test.in/dir_0_0/m_0_0_0_1/main.mbt b/crates/moon/tests/test_cases/bench2_test.in/dir_0_0/m_0_0_0_1/main.mbt
new file mode 100644
index 00000000..2fef350e
--- /dev/null
+++ b/crates/moon/tests/test_cases/bench2_test.in/dir_0_0/m_0_0_0_1/main.mbt
@@ -0,0 +1,3 @@
+// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX //
+pub fn f() -> Unit {
+}
diff --git a/crates/moon/tests/test_cases/bench2_test.in/dir_0_0/m_0_0_0_1/moon.pkg.json b/crates/moon/tests/test_cases/bench2_test.in/dir_0_0/m_0_0_0_1/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/bench2_test.in/dir_0_0/m_0_0_0_1/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/bench2_test.in/dir_0_0/m_0_0_1_0/main.mbt b/crates/moon/tests/test_cases/bench2_test.in/dir_0_0/m_0_0_1_0/main.mbt
new file mode 100644
index 00000000..6698d69e
--- /dev/null
+++ b/crates/moon/tests/test_cases/bench2_test.in/dir_0_0/m_0_0_1_0/main.mbt
@@ -0,0 +1,5 @@
+// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX //
+pub fn f() -> Unit {
+  @m_0_0_0_0.f()
+  @m_0_0_0_1.f()
+}
diff --git a/crates/moon/tests/test_cases/bench2_test.in/dir_0_0/m_0_0_1_0/moon.pkg.json b/crates/moon/tests/test_cases/bench2_test.in/dir_0_0/m_0_0_1_0/moon.pkg.json
new file mode 100644
index 00000000..8c8378aa
--- /dev/null
+++ b/crates/moon/tests/test_cases/bench2_test.in/dir_0_0/m_0_0_1_0/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "import": {
+    "build_matrix/dir_0_0/m_0_0_0_0": "",
+    "build_matrix/dir_0_0/m_0_0_0_1": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/bench2_test.in/dir_0_0/m_0_0_1_1/main.mbt b/crates/moon/tests/test_cases/bench2_test.in/dir_0_0/m_0_0_1_1/main.mbt
new file mode 100644
index 00000000..6698d69e
--- /dev/null
+++ b/crates/moon/tests/test_cases/bench2_test.in/dir_0_0/m_0_0_1_1/main.mbt
@@ -0,0 +1,5 @@
+// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX //
+pub fn f() -> Unit {
+  @m_0_0_0_0.f()
+  @m_0_0_0_1.f()
+}
diff --git a/crates/moon/tests/test_cases/bench2_test.in/dir_0_0/m_0_0_1_1/moon.pkg.json b/crates/moon/tests/test_cases/bench2_test.in/dir_0_0/m_0_0_1_1/moon.pkg.json
new file mode 100644
index 00000000..8c8378aa
--- /dev/null
+++ b/crates/moon/tests/test_cases/bench2_test.in/dir_0_0/m_0_0_1_1/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "import": {
+    "build_matrix/dir_0_0/m_0_0_0_0": "",
+    "build_matrix/dir_0_0/m_0_0_0_1": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/bench2_test.in/dir_0_1/m_0_1_0_0/main.mbt b/crates/moon/tests/test_cases/bench2_test.in/dir_0_1/m_0_1_0_0/main.mbt
new file mode 100644
index 00000000..2fef350e
--- /dev/null
+++ b/crates/moon/tests/test_cases/bench2_test.in/dir_0_1/m_0_1_0_0/main.mbt
@@ -0,0 +1,3 @@
+// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX //
+pub fn f() -> Unit {
+}
diff --git a/crates/moon/tests/test_cases/bench2_test.in/dir_0_1/m_0_1_0_0/moon.pkg.json b/crates/moon/tests/test_cases/bench2_test.in/dir_0_1/m_0_1_0_0/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/bench2_test.in/dir_0_1/m_0_1_0_0/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/bench2_test.in/dir_0_1/m_0_1_0_1/main.mbt b/crates/moon/tests/test_cases/bench2_test.in/dir_0_1/m_0_1_0_1/main.mbt
new file mode 100644
index 00000000..2fef350e
--- /dev/null
+++ b/crates/moon/tests/test_cases/bench2_test.in/dir_0_1/m_0_1_0_1/main.mbt
@@ -0,0 +1,3 @@
+// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX //
+pub fn f() -> Unit {
+}
diff --git a/crates/moon/tests/test_cases/bench2_test.in/dir_0_1/m_0_1_0_1/moon.pkg.json b/crates/moon/tests/test_cases/bench2_test.in/dir_0_1/m_0_1_0_1/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/bench2_test.in/dir_0_1/m_0_1_0_1/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/bench2_test.in/dir_0_1/m_0_1_1_0/main.mbt b/crates/moon/tests/test_cases/bench2_test.in/dir_0_1/m_0_1_1_0/main.mbt
new file mode 100644
index 00000000..e56b6dd0
--- /dev/null
+++ b/crates/moon/tests/test_cases/bench2_test.in/dir_0_1/m_0_1_1_0/main.mbt
@@ -0,0 +1,5 @@
+// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX //
+pub fn f() -> Unit {
+  @m_0_1_0_0.f()
+  @m_0_1_0_1.f()
+}
diff --git a/crates/moon/tests/test_cases/bench2_test.in/dir_0_1/m_0_1_1_0/moon.pkg.json b/crates/moon/tests/test_cases/bench2_test.in/dir_0_1/m_0_1_1_0/moon.pkg.json
new file mode 100644
index 00000000..1cd4453b
--- /dev/null
+++ b/crates/moon/tests/test_cases/bench2_test.in/dir_0_1/m_0_1_1_0/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "import": {
+    "build_matrix/dir_0_1/m_0_1_0_0": "",
+    "build_matrix/dir_0_1/m_0_1_0_1": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/bench2_test.in/dir_0_1/m_0_1_1_1/main.mbt b/crates/moon/tests/test_cases/bench2_test.in/dir_0_1/m_0_1_1_1/main.mbt
new file mode 100644
index 00000000..e56b6dd0
--- /dev/null
+++ b/crates/moon/tests/test_cases/bench2_test.in/dir_0_1/m_0_1_1_1/main.mbt
@@ -0,0 +1,5 @@
+// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX //
+pub fn f() -> Unit {
+  @m_0_1_0_0.f()
+  @m_0_1_0_1.f()
+}
diff --git a/crates/moon/tests/test_cases/bench2_test.in/dir_0_1/m_0_1_1_1/moon.pkg.json b/crates/moon/tests/test_cases/bench2_test.in/dir_0_1/m_0_1_1_1/moon.pkg.json
new file mode 100644
index 00000000..1cd4453b
--- /dev/null
+++ b/crates/moon/tests/test_cases/bench2_test.in/dir_0_1/m_0_1_1_1/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "import": {
+    "build_matrix/dir_0_1/m_0_1_0_0": "",
+    "build_matrix/dir_0_1/m_0_1_0_1": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/bench2_test.in/dir_1_0/m_1_0_0_0/main.mbt b/crates/moon/tests/test_cases/bench2_test.in/dir_1_0/m_1_0_0_0/main.mbt
new file mode 100644
index 00000000..c2afeabf
--- /dev/null
+++ b/crates/moon/tests/test_cases/bench2_test.in/dir_1_0/m_1_0_0_0/main.mbt
@@ -0,0 +1,7 @@
+// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX //
+pub fn f() -> Unit {
+  @m_0_0_1_0.f()
+  @m_0_1_1_0.f()
+  @m_0_0_1_1.f()
+  @m_0_1_1_1.f()
+}
diff --git a/crates/moon/tests/test_cases/bench2_test.in/dir_1_0/m_1_0_0_0/moon.pkg.json b/crates/moon/tests/test_cases/bench2_test.in/dir_1_0/m_1_0_0_0/moon.pkg.json
new file mode 100644
index 00000000..b2664e77
--- /dev/null
+++ b/crates/moon/tests/test_cases/bench2_test.in/dir_1_0/m_1_0_0_0/moon.pkg.json
@@ -0,0 +1,8 @@
+{
+  "import": {
+    "build_matrix/dir_0_0/m_0_0_1_0": "",
+    "build_matrix/dir_0_1/m_0_1_1_0": "",
+    "build_matrix/dir_0_0/m_0_0_1_1": "",
+    "build_matrix/dir_0_1/m_0_1_1_1": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/bench2_test.in/dir_1_0/m_1_0_0_1/main.mbt b/crates/moon/tests/test_cases/bench2_test.in/dir_1_0/m_1_0_0_1/main.mbt
new file mode 100644
index 00000000..c2afeabf
--- /dev/null
+++ b/crates/moon/tests/test_cases/bench2_test.in/dir_1_0/m_1_0_0_1/main.mbt
@@ -0,0 +1,7 @@
+// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX //
+pub fn f() -> Unit {
+  @m_0_0_1_0.f()
+  @m_0_1_1_0.f()
+  @m_0_0_1_1.f()
+  @m_0_1_1_1.f()
+}
diff --git a/crates/moon/tests/test_cases/bench2_test.in/dir_1_0/m_1_0_0_1/moon.pkg.json b/crates/moon/tests/test_cases/bench2_test.in/dir_1_0/m_1_0_0_1/moon.pkg.json
new file mode 100644
index 00000000..b2664e77
--- /dev/null
+++ b/crates/moon/tests/test_cases/bench2_test.in/dir_1_0/m_1_0_0_1/moon.pkg.json
@@ -0,0 +1,8 @@
+{
+  "import": {
+    "build_matrix/dir_0_0/m_0_0_1_0": "",
+    "build_matrix/dir_0_1/m_0_1_1_0": "",
+    "build_matrix/dir_0_0/m_0_0_1_1": "",
+    "build_matrix/dir_0_1/m_0_1_1_1": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/bench2_test.in/dir_1_0/m_1_0_1_0/main.mbt b/crates/moon/tests/test_cases/bench2_test.in/dir_1_0/m_1_0_1_0/main.mbt
new file mode 100644
index 00000000..63cec707
--- /dev/null
+++ b/crates/moon/tests/test_cases/bench2_test.in/dir_1_0/m_1_0_1_0/main.mbt
@@ -0,0 +1,5 @@
+// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX //
+pub fn f() -> Unit {
+  @m_1_0_0_0.f()
+  @m_1_0_0_1.f()
+}
diff --git a/crates/moon/tests/test_cases/bench2_test.in/dir_1_0/m_1_0_1_0/moon.pkg.json b/crates/moon/tests/test_cases/bench2_test.in/dir_1_0/m_1_0_1_0/moon.pkg.json
new file mode 100644
index 00000000..283b4f80
--- /dev/null
+++ b/crates/moon/tests/test_cases/bench2_test.in/dir_1_0/m_1_0_1_0/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "import": {
+    "build_matrix/dir_1_0/m_1_0_0_0": "",
+    "build_matrix/dir_1_0/m_1_0_0_1": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/bench2_test.in/dir_1_0/m_1_0_1_1/main.mbt b/crates/moon/tests/test_cases/bench2_test.in/dir_1_0/m_1_0_1_1/main.mbt
new file mode 100644
index 00000000..63cec707
--- /dev/null
+++ b/crates/moon/tests/test_cases/bench2_test.in/dir_1_0/m_1_0_1_1/main.mbt
@@ -0,0 +1,5 @@
+// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX //
+pub fn f() -> Unit {
+  @m_1_0_0_0.f()
+  @m_1_0_0_1.f()
+}
diff --git a/crates/moon/tests/test_cases/bench2_test.in/dir_1_0/m_1_0_1_1/moon.pkg.json b/crates/moon/tests/test_cases/bench2_test.in/dir_1_0/m_1_0_1_1/moon.pkg.json
new file mode 100644
index 00000000..283b4f80
--- /dev/null
+++ b/crates/moon/tests/test_cases/bench2_test.in/dir_1_0/m_1_0_1_1/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "import": {
+    "build_matrix/dir_1_0/m_1_0_0_0": "",
+    "build_matrix/dir_1_0/m_1_0_0_1": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/bench2_test.in/dir_1_1/m_1_1_0_0/main.mbt b/crates/moon/tests/test_cases/bench2_test.in/dir_1_1/m_1_1_0_0/main.mbt
new file mode 100644
index 00000000..c2afeabf
--- /dev/null
+++ b/crates/moon/tests/test_cases/bench2_test.in/dir_1_1/m_1_1_0_0/main.mbt
@@ -0,0 +1,7 @@
+// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX //
+pub fn f() -> Unit {
+  @m_0_0_1_0.f()
+  @m_0_1_1_0.f()
+  @m_0_0_1_1.f()
+  @m_0_1_1_1.f()
+}
diff --git a/crates/moon/tests/test_cases/bench2_test.in/dir_1_1/m_1_1_0_0/moon.pkg.json b/crates/moon/tests/test_cases/bench2_test.in/dir_1_1/m_1_1_0_0/moon.pkg.json
new file mode 100644
index 00000000..b2664e77
--- /dev/null
+++ b/crates/moon/tests/test_cases/bench2_test.in/dir_1_1/m_1_1_0_0/moon.pkg.json
@@ -0,0 +1,8 @@
+{
+  "import": {
+    "build_matrix/dir_0_0/m_0_0_1_0": "",
+    "build_matrix/dir_0_1/m_0_1_1_0": "",
+    "build_matrix/dir_0_0/m_0_0_1_1": "",
+    "build_matrix/dir_0_1/m_0_1_1_1": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/bench2_test.in/dir_1_1/m_1_1_0_1/main.mbt b/crates/moon/tests/test_cases/bench2_test.in/dir_1_1/m_1_1_0_1/main.mbt
new file mode 100644
index 00000000..c2afeabf
--- /dev/null
+++ b/crates/moon/tests/test_cases/bench2_test.in/dir_1_1/m_1_1_0_1/main.mbt
@@ -0,0 +1,7 @@
+// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX //
+pub fn f() -> Unit {
+  @m_0_0_1_0.f()
+  @m_0_1_1_0.f()
+  @m_0_0_1_1.f()
+  @m_0_1_1_1.f()
+}
diff --git a/crates/moon/tests/test_cases/bench2_test.in/dir_1_1/m_1_1_0_1/moon.pkg.json b/crates/moon/tests/test_cases/bench2_test.in/dir_1_1/m_1_1_0_1/moon.pkg.json
new file mode 100644
index 00000000..b2664e77
--- /dev/null
+++ b/crates/moon/tests/test_cases/bench2_test.in/dir_1_1/m_1_1_0_1/moon.pkg.json
@@ -0,0 +1,8 @@
+{
+  "import": {
+    "build_matrix/dir_0_0/m_0_0_1_0": "",
+    "build_matrix/dir_0_1/m_0_1_1_0": "",
+    "build_matrix/dir_0_0/m_0_0_1_1": "",
+    "build_matrix/dir_0_1/m_0_1_1_1": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/bench2_test.in/dir_1_1/m_1_1_1_0/main.mbt b/crates/moon/tests/test_cases/bench2_test.in/dir_1_1/m_1_1_1_0/main.mbt
new file mode 100644
index 00000000..86c926b2
--- /dev/null
+++ b/crates/moon/tests/test_cases/bench2_test.in/dir_1_1/m_1_1_1_0/main.mbt
@@ -0,0 +1,5 @@
+// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX //
+pub fn f() -> Unit {
+  @m_1_1_0_0.f()
+  @m_1_1_0_1.f()
+}
diff --git a/crates/moon/tests/test_cases/bench2_test.in/dir_1_1/m_1_1_1_0/moon.pkg.json b/crates/moon/tests/test_cases/bench2_test.in/dir_1_1/m_1_1_1_0/moon.pkg.json
new file mode 100644
index 00000000..d1cf3160
--- /dev/null
+++ b/crates/moon/tests/test_cases/bench2_test.in/dir_1_1/m_1_1_1_0/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "import": {
+    "build_matrix/dir_1_1/m_1_1_0_0": "",
+    "build_matrix/dir_1_1/m_1_1_0_1": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/bench2_test.in/dir_1_1/m_1_1_1_1/main.mbt b/crates/moon/tests/test_cases/bench2_test.in/dir_1_1/m_1_1_1_1/main.mbt
new file mode 100644
index 00000000..86c926b2
--- /dev/null
+++ b/crates/moon/tests/test_cases/bench2_test.in/dir_1_1/m_1_1_1_1/main.mbt
@@ -0,0 +1,5 @@
+// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX //
+pub fn f() -> Unit {
+  @m_1_1_0_0.f()
+  @m_1_1_0_1.f()
+}
diff --git a/crates/moon/tests/test_cases/bench2_test.in/dir_1_1/m_1_1_1_1/moon.pkg.json b/crates/moon/tests/test_cases/bench2_test.in/dir_1_1/m_1_1_1_1/moon.pkg.json
new file mode 100644
index 00000000..d1cf3160
--- /dev/null
+++ b/crates/moon/tests/test_cases/bench2_test.in/dir_1_1/m_1_1_1_1/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "import": {
+    "build_matrix/dir_1_1/m_1_1_0_0": "",
+    "build_matrix/dir_1_1/m_1_1_0_1": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/bench2_test.in/main/main.mbt b/crates/moon/tests/test_cases/bench2_test.in/main/main.mbt
new file mode 100644
index 00000000..09c56783
--- /dev/null
+++ b/crates/moon/tests/test_cases/bench2_test.in/main/main.mbt
@@ -0,0 +1,19 @@
+fn main {
+    let _ = @m_0_0_0_0.f
+    let _ = @m_0_0_0_1.f
+    let _ = @m_0_0_1_0.f
+    let _ = @m_0_0_1_1.f
+    let _ = @m_0_1_0_0.f
+    let _ = @m_0_1_0_1.f
+    let _ = @m_0_1_1_0.f
+    let _ = @m_0_1_1_1.f
+    let _ = @m_1_0_0_0.f
+    let _ = @m_1_0_0_1.f
+    let _ = @m_1_0_1_0.f
+    let _ = @m_1_0_1_1.f
+    let _ = @m_1_1_0_0.f
+    let _ = @m_1_1_0_1.f
+    let _ = @m_1_1_1_0.f
+    let _ = @m_1_1_1_1.f
+    println("ok")
+}
diff --git a/crates/moon/tests/test_cases/bench2_test.in/main/moon.pkg.json b/crates/moon/tests/test_cases/bench2_test.in/main/moon.pkg.json
new file mode 100644
index 00000000..6accd5c0
--- /dev/null
+++ b/crates/moon/tests/test_cases/bench2_test.in/main/moon.pkg.json
@@ -0,0 +1,21 @@
+{
+  "is-main": true,
+  "import": {
+    "build_matrix/dir_0_0/m_0_0_0_0": "",
+    "build_matrix/dir_0_0/m_0_0_0_1": "",
+    "build_matrix/dir_0_0/m_0_0_1_0": "",
+    "build_matrix/dir_0_0/m_0_0_1_1": "",
+    "build_matrix/dir_0_1/m_0_1_0_0": "",
+    "build_matrix/dir_0_1/m_0_1_0_1": "",
+    "build_matrix/dir_0_1/m_0_1_1_0": "",
+    "build_matrix/dir_0_1/m_0_1_1_1": "",
+    "build_matrix/dir_1_0/m_1_0_0_0": "",
+    "build_matrix/dir_1_0/m_1_0_0_1": "",
+    "build_matrix/dir_1_0/m_1_0_1_0": "",
+    "build_matrix/dir_1_0/m_1_0_1_1": "",
+    "build_matrix/dir_1_1/m_1_1_0_0": "",
+    "build_matrix/dir_1_1/m_1_1_0_1": "",
+    "build_matrix/dir_1_1/m_1_1_1_0": "",
+    "build_matrix/dir_1_1/m_1_1_1_1": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/bench2_test.in/moon.mod.json b/crates/moon/tests/test_cases/bench2_test.in/moon.mod.json
new file mode 100644
index 00000000..6143fe76
--- /dev/null
+++ b/crates/moon/tests/test_cases/bench2_test.in/moon.mod.json
@@ -0,0 +1,3 @@
+{
+  "name": "build_matrix"
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/blackbox_failed_test.in/A/hello.mbt b/crates/moon/tests/test_cases/blackbox_failed_test.in/A/hello.mbt
new file mode 100644
index 00000000..90c8c0a9
--- /dev/null
+++ b/crates/moon/tests/test_cases/blackbox_failed_test.in/A/hello.mbt
@@ -0,0 +1,7 @@
+pub fn hello() -> Unit {
+  println("output from A/hello.mbt!")
+}
+
+fn _private_hello() -> Unit {
+  println("output from A/hello.mbt::_private_hello")
+}
diff --git a/crates/moon/tests/test_cases/blackbox_failed_test.in/A/hello_test.mbt b/crates/moon/tests/test_cases/blackbox_failed_test.in/A/hello_test.mbt
new file mode 100644
index 00000000..f06e81d2
--- /dev/null
+++ b/crates/moon/tests/test_cases/blackbox_failed_test.in/A/hello_test.mbt
@@ -0,0 +1,10 @@
+pub fn hello_bbtest() -> Unit {
+  println("output from A/hello_bbtest.mbt!")
+}
+
+test {
+  let a = 1
+  let mut b = 1
+  // should failed
+  @A._private_hello()
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/blackbox_failed_test.in/A/hello_wbtest.mbt b/crates/moon/tests/test_cases/blackbox_failed_test.in/A/hello_wbtest.mbt
new file mode 100644
index 00000000..d16c572a
--- /dev/null
+++ b/crates/moon/tests/test_cases/blackbox_failed_test.in/A/hello_wbtest.mbt
@@ -0,0 +1,13 @@
+pub fn hello_test() -> Unit {
+  println("output from A/hello_test.mbt!")
+}
+
+test {
+  // it's ok for _test.mbt to use test_import
+  @B.hello()
+}
+
+test {
+  // should failed, bbtest_import could no be used in _test.mbt
+  @C.hello()
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/blackbox_failed_test.in/A/moon.pkg.json b/crates/moon/tests/test_cases/blackbox_failed_test.in/A/moon.pkg.json
new file mode 100644
index 00000000..3e169cca
--- /dev/null
+++ b/crates/moon/tests/test_cases/blackbox_failed_test.in/A/moon.pkg.json
@@ -0,0 +1,9 @@
+{
+  "import": [],
+  "wbtest-import": [
+    "username/hello/B"
+  ],
+  "test-import": [
+    "username/hello/C"
+  ]
+}
diff --git a/crates/moon/tests/test_cases/blackbox_failed_test.in/B/hello.mbt b/crates/moon/tests/test_cases/blackbox_failed_test.in/B/hello.mbt
new file mode 100644
index 00000000..b615d2f8
--- /dev/null
+++ b/crates/moon/tests/test_cases/blackbox_failed_test.in/B/hello.mbt
@@ -0,0 +1,4 @@
+pub fn hello() -> Unit {
+  println("output from B/hello.mbt!")
+}
+
diff --git a/crates/moon/tests/test_cases/blackbox_failed_test.in/B/moon.pkg.json b/crates/moon/tests/test_cases/blackbox_failed_test.in/B/moon.pkg.json
new file mode 100644
index 00000000..72eb22fe
--- /dev/null
+++ b/crates/moon/tests/test_cases/blackbox_failed_test.in/B/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/blackbox_failed_test.in/C/hello.mbt b/crates/moon/tests/test_cases/blackbox_failed_test.in/C/hello.mbt
new file mode 100644
index 00000000..5ac3ffa2
--- /dev/null
+++ b/crates/moon/tests/test_cases/blackbox_failed_test.in/C/hello.mbt
@@ -0,0 +1,4 @@
+pub fn hello() -> Unit {
+  println("output from C/hello.mbt!")
+}
+
diff --git a/crates/moon/tests/test_cases/blackbox_failed_test.in/C/moon.pkg.json b/crates/moon/tests/test_cases/blackbox_failed_test.in/C/moon.pkg.json
new file mode 100644
index 00000000..72eb22fe
--- /dev/null
+++ b/crates/moon/tests/test_cases/blackbox_failed_test.in/C/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/blackbox_failed_test.in/main/main.mbt b/crates/moon/tests/test_cases/blackbox_failed_test.in/main/main.mbt
new file mode 100644
index 00000000..1807db5d
--- /dev/null
+++ b/crates/moon/tests/test_cases/blackbox_failed_test.in/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println("hello from main.mbt!")
+}
diff --git a/crates/moon/tests/test_cases/blackbox_failed_test.in/main/moon.pkg.json b/crates/moon/tests/test_cases/blackbox_failed_test.in/main/moon.pkg.json
new file mode 100644
index 00000000..fcc86bad
--- /dev/null
+++ b/crates/moon/tests/test_cases/blackbox_failed_test.in/main/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "is-main": true
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/blackbox_failed_test.in/moon.mod.json b/crates/moon/tests/test_cases/blackbox_failed_test.in/moon.mod.json
new file mode 100644
index 00000000..ed90db93
--- /dev/null
+++ b/crates/moon/tests/test_cases/blackbox_failed_test.in/moon.mod.json
@@ -0,0 +1,3 @@
+{
+  "name": "username/hello"
+}
diff --git a/crates/moon/tests/test_cases/blackbox_success_test.in/A/hello.mbt b/crates/moon/tests/test_cases/blackbox_success_test.in/A/hello.mbt
new file mode 100644
index 00000000..2f2e5656
--- /dev/null
+++ b/crates/moon/tests/test_cases/blackbox_success_test.in/A/hello.mbt
@@ -0,0 +1,22 @@
+pub fn hello() -> Unit {
+  println("output from A/hello.mbt!")
+}
+
+fn _private_hello() -> Unit {
+  println("output from A/hello.mbt::_private_hello")
+}
+
+struct StructA {
+  a: Int
+}
+
+pub fn new() -> StructA {
+  {
+    a: 33
+  }
+}
+
+pub fn method(self : StructA) -> Unit {
+  println("self.a: " + self.a.to_string())
+}
+
diff --git a/crates/moon/tests/test_cases/blackbox_success_test.in/A/hello_test.mbt b/crates/moon/tests/test_cases/blackbox_success_test.in/A/hello_test.mbt
new file mode 100644
index 00000000..47127717
--- /dev/null
+++ b/crates/moon/tests/test_cases/blackbox_success_test.in/A/hello_test.mbt
@@ -0,0 +1,17 @@
+pub fn hello_bbtest() -> Unit {
+  println("output from A/hello_bbtest.mbt!")
+}
+
+test {
+  // current pkg
+  @A.hello()
+  // bbtest_import pkg
+  @C.hello()
+  // import pkg
+  @D.hello()
+}
+
+test {
+  let a = @A.new()
+  a.method()
+}
diff --git a/crates/moon/tests/test_cases/blackbox_success_test.in/A/hello_wbtest.mbt b/crates/moon/tests/test_cases/blackbox_success_test.in/A/hello_wbtest.mbt
new file mode 100644
index 00000000..034e32e1
--- /dev/null
+++ b/crates/moon/tests/test_cases/blackbox_success_test.in/A/hello_wbtest.mbt
@@ -0,0 +1,4 @@
+pub fn hello_test() -> Unit {
+  println("output from A/hello_test.mbt!")
+}
+
diff --git a/crates/moon/tests/test_cases/blackbox_success_test.in/A/moon.pkg.json b/crates/moon/tests/test_cases/blackbox_success_test.in/A/moon.pkg.json
new file mode 100644
index 00000000..d2a5b5f6
--- /dev/null
+++ b/crates/moon/tests/test_cases/blackbox_success_test.in/A/moon.pkg.json
@@ -0,0 +1,11 @@
+{
+  "import": [
+    "username/hello/D"
+  ],
+  "wbtest-import": [
+    "username/hello/B"
+  ],
+  "test-import": [
+    "username/hello/C"
+  ]
+}
diff --git a/crates/moon/tests/test_cases/blackbox_success_test.in/B/hello.mbt b/crates/moon/tests/test_cases/blackbox_success_test.in/B/hello.mbt
new file mode 100644
index 00000000..b615d2f8
--- /dev/null
+++ b/crates/moon/tests/test_cases/blackbox_success_test.in/B/hello.mbt
@@ -0,0 +1,4 @@
+pub fn hello() -> Unit {
+  println("output from B/hello.mbt!")
+}
+
diff --git a/crates/moon/tests/test_cases/blackbox_success_test.in/B/moon.pkg.json b/crates/moon/tests/test_cases/blackbox_success_test.in/B/moon.pkg.json
new file mode 100644
index 00000000..72eb22fe
--- /dev/null
+++ b/crates/moon/tests/test_cases/blackbox_success_test.in/B/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/blackbox_success_test.in/C/hello.mbt b/crates/moon/tests/test_cases/blackbox_success_test.in/C/hello.mbt
new file mode 100644
index 00000000..5ac3ffa2
--- /dev/null
+++ b/crates/moon/tests/test_cases/blackbox_success_test.in/C/hello.mbt
@@ -0,0 +1,4 @@
+pub fn hello() -> Unit {
+  println("output from C/hello.mbt!")
+}
+
diff --git a/crates/moon/tests/test_cases/blackbox_success_test.in/C/moon.pkg.json b/crates/moon/tests/test_cases/blackbox_success_test.in/C/moon.pkg.json
new file mode 100644
index 00000000..72eb22fe
--- /dev/null
+++ b/crates/moon/tests/test_cases/blackbox_success_test.in/C/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/blackbox_success_test.in/D/hello.mbt b/crates/moon/tests/test_cases/blackbox_success_test.in/D/hello.mbt
new file mode 100644
index 00000000..6d7c0788
--- /dev/null
+++ b/crates/moon/tests/test_cases/blackbox_success_test.in/D/hello.mbt
@@ -0,0 +1,4 @@
+pub fn hello() -> Unit {
+  println("output from D/hello.mbt!")
+}
+
diff --git a/crates/moon/tests/test_cases/blackbox_success_test.in/D/moon.pkg.json b/crates/moon/tests/test_cases/blackbox_success_test.in/D/moon.pkg.json
new file mode 100644
index 00000000..72eb22fe
--- /dev/null
+++ b/crates/moon/tests/test_cases/blackbox_success_test.in/D/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/blackbox_success_test.in/main/main.mbt b/crates/moon/tests/test_cases/blackbox_success_test.in/main/main.mbt
new file mode 100644
index 00000000..1807db5d
--- /dev/null
+++ b/crates/moon/tests/test_cases/blackbox_success_test.in/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println("hello from main.mbt!")
+}
diff --git a/crates/moon/tests/test_cases/blackbox_success_test.in/main/moon.pkg.json b/crates/moon/tests/test_cases/blackbox_success_test.in/main/moon.pkg.json
new file mode 100644
index 00000000..fcc86bad
--- /dev/null
+++ b/crates/moon/tests/test_cases/blackbox_success_test.in/main/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "is-main": true
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/blackbox_success_test.in/moon.mod.json b/crates/moon/tests/test_cases/blackbox_success_test.in/moon.mod.json
new file mode 100644
index 00000000..ed90db93
--- /dev/null
+++ b/crates/moon/tests/test_cases/blackbox_success_test.in/moon.mod.json
@@ -0,0 +1,3 @@
+{
+  "name": "username/hello"
+}
diff --git a/crates/moon/tests/test_cases/cakenew_test.in/.gitignore b/crates/moon/tests/test_cases/cakenew_test.in/.gitignore
new file mode 100644
index 00000000..b1283a74
--- /dev/null
+++ b/crates/moon/tests/test_cases/cakenew_test.in/.gitignore
@@ -0,0 +1,2 @@
+target/
+.mooncakes/
diff --git a/crates/moon/tests/test_cases/cakenew_test.in/lib/hello.mbt b/crates/moon/tests/test_cases/cakenew_test.in/lib/hello.mbt
new file mode 100644
index 00000000..9012592a
--- /dev/null
+++ b/crates/moon/tests/test_cases/cakenew_test.in/lib/hello.mbt
@@ -0,0 +1,3 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
diff --git a/crates/moon/tests/test_cases/cakenew_test.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/cakenew_test.in/lib/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/cakenew_test.in/lib/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/cakenew_test.in/main/main.mbt b/crates/moon/tests/test_cases/cakenew_test.in/main/main.mbt
new file mode 100644
index 00000000..d25cb935
--- /dev/null
+++ b/crates/moon/tests/test_cases/cakenew_test.in/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println(@lib.hello())
+}
diff --git a/crates/moon/tests/test_cases/cakenew_test.in/main/moon.pkg.json b/crates/moon/tests/test_cases/cakenew_test.in/main/moon.pkg.json
new file mode 100644
index 00000000..a2e1932e
--- /dev/null
+++ b/crates/moon/tests/test_cases/cakenew_test.in/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": {
+    "test/cakenew/lib": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/cakenew_test.in/moon.mod.json b/crates/moon/tests/test_cases/cakenew_test.in/moon.mod.json
new file mode 100644
index 00000000..1ad68fc9
--- /dev/null
+++ b/crates/moon/tests/test_cases/cakenew_test.in/moon.mod.json
@@ -0,0 +1,4 @@
+{
+  "name": "test/cakenew",
+  "version": "0.1.0"
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/capture_abort_test.in/lib/hello.mbt b/crates/moon/tests/test_cases/capture_abort_test.in/lib/hello.mbt
new file mode 100644
index 00000000..a7ac2bee
--- /dev/null
+++ b/crates/moon/tests/test_cases/capture_abort_test.in/lib/hello.mbt
@@ -0,0 +1,4 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
+
diff --git a/crates/moon/tests/test_cases/capture_abort_test.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/capture_abort_test.in/lib/moon.pkg.json
new file mode 100644
index 00000000..9585a087
--- /dev/null
+++ b/crates/moon/tests/test_cases/capture_abort_test.in/lib/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
diff --git a/crates/moon/tests/test_cases/capture_abort_test.in/main/main.mbt b/crates/moon/tests/test_cases/capture_abort_test.in/main/main.mbt
new file mode 100644
index 00000000..6a1e73af
--- /dev/null
+++ b/crates/moon/tests/test_cases/capture_abort_test.in/main/main.mbt
@@ -0,0 +1,4 @@
+fn main {
+  abort("test-capture-abort")
+  println(@lib.hello())
+}
diff --git a/crates/moon/tests/test_cases/capture_abort_test.in/main/moon.pkg.json b/crates/moon/tests/test_cases/capture_abort_test.in/main/moon.pkg.json
new file mode 100644
index 00000000..9b2dcaba
--- /dev/null
+++ b/crates/moon/tests/test_cases/capture_abort_test.in/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": {
+    "capture/lib": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/capture_abort_test.in/moon.mod.json b/crates/moon/tests/test_cases/capture_abort_test.in/moon.mod.json
new file mode 100644
index 00000000..cc8ed6f4
--- /dev/null
+++ b/crates/moon/tests/test_cases/capture_abort_test.in/moon.mod.json
@@ -0,0 +1,3 @@
+{
+  "name": "capture"
+}
diff --git a/crates/moon/tests/test_cases/check_failed_should_write_pkg_json.in/lib/hello.mbt b/crates/moon/tests/test_cases/check_failed_should_write_pkg_json.in/lib/hello.mbt
new file mode 100644
index 00000000..b3c24a3c
--- /dev/null
+++ b/crates/moon/tests/test_cases/check_failed_should_write_pkg_json.in/lib/hello.mbt
@@ -0,0 +1,4 @@
+pub fn hello() -> String {
+  1
+}
+
diff --git a/crates/moon/tests/test_cases/check_failed_should_write_pkg_json.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/check_failed_should_write_pkg_json.in/lib/moon.pkg.json
new file mode 100644
index 00000000..9585a087
--- /dev/null
+++ b/crates/moon/tests/test_cases/check_failed_should_write_pkg_json.in/lib/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
diff --git a/crates/moon/tests/test_cases/check_failed_should_write_pkg_json.in/main/main.mbt b/crates/moon/tests/test_cases/check_failed_should_write_pkg_json.in/main/main.mbt
new file mode 100644
index 00000000..d25cb935
--- /dev/null
+++ b/crates/moon/tests/test_cases/check_failed_should_write_pkg_json.in/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println(@lib.hello())
+}
diff --git a/crates/moon/tests/test_cases/check_failed_should_write_pkg_json.in/main/moon.pkg.json b/crates/moon/tests/test_cases/check_failed_should_write_pkg_json.in/main/moon.pkg.json
new file mode 100644
index 00000000..4343a4ef
--- /dev/null
+++ b/crates/moon/tests/test_cases/check_failed_should_write_pkg_json.in/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": {
+    "moon_new/lib": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/check_failed_should_write_pkg_json.in/moon.mod.json b/crates/moon/tests/test_cases/check_failed_should_write_pkg_json.in/moon.mod.json
new file mode 100644
index 00000000..b5d8b346
--- /dev/null
+++ b/crates/moon/tests/test_cases/check_failed_should_write_pkg_json.in/moon.mod.json
@@ -0,0 +1,3 @@
+{
+  "name": "moon_new"
+}
diff --git a/crates/moon/tests/test_cases/circle_pkg_AB_001_test.in/A/lib.mbt b/crates/moon/tests/test_cases/circle_pkg_AB_001_test.in/A/lib.mbt
new file mode 100644
index 00000000..da57cded
--- /dev/null
+++ b/crates/moon/tests/test_cases/circle_pkg_AB_001_test.in/A/lib.mbt
@@ -0,0 +1,4 @@
+pub fn f() -> Unit {
+  @B.f()
+  println("A")
+}
diff --git a/crates/moon/tests/test_cases/circle_pkg_AB_001_test.in/A/moon.pkg.json b/crates/moon/tests/test_cases/circle_pkg_AB_001_test.in/A/moon.pkg.json
new file mode 100644
index 00000000..958f9e17
--- /dev/null
+++ b/crates/moon/tests/test_cases/circle_pkg_AB_001_test.in/A/moon.pkg.json
@@ -0,0 +1,5 @@
+{
+  "import": {
+    "hello/B": ""
+  }
+}
diff --git a/crates/moon/tests/test_cases/circle_pkg_AB_001_test.in/B/lib.mbt b/crates/moon/tests/test_cases/circle_pkg_AB_001_test.in/B/lib.mbt
new file mode 100644
index 00000000..98f4a947
--- /dev/null
+++ b/crates/moon/tests/test_cases/circle_pkg_AB_001_test.in/B/lib.mbt
@@ -0,0 +1,4 @@
+pub fn f() -> Unit {
+  @A.f()
+  println("B")
+}
diff --git a/crates/moon/tests/test_cases/circle_pkg_AB_001_test.in/B/moon.pkg.json b/crates/moon/tests/test_cases/circle_pkg_AB_001_test.in/B/moon.pkg.json
new file mode 100644
index 00000000..d83e82ab
--- /dev/null
+++ b/crates/moon/tests/test_cases/circle_pkg_AB_001_test.in/B/moon.pkg.json
@@ -0,0 +1,5 @@
+{
+  "import": {
+    "hello/A": ""
+  }
+}
diff --git a/crates/moon/tests/test_cases/circle_pkg_AB_001_test.in/main/main.mbt b/crates/moon/tests/test_cases/circle_pkg_AB_001_test.in/main/main.mbt
new file mode 100644
index 00000000..737e3785
--- /dev/null
+++ b/crates/moon/tests/test_cases/circle_pkg_AB_001_test.in/main/main.mbt
@@ -0,0 +1,5 @@
+fn main {
+  @A.f()
+  @B.f()
+  println("main")
+}
diff --git a/crates/moon/tests/test_cases/circle_pkg_AB_001_test.in/main/moon.pkg.json b/crates/moon/tests/test_cases/circle_pkg_AB_001_test.in/main/moon.pkg.json
new file mode 100644
index 00000000..f65683f6
--- /dev/null
+++ b/crates/moon/tests/test_cases/circle_pkg_AB_001_test.in/main/moon.pkg.json
@@ -0,0 +1,7 @@
+{
+  "is-main": true,
+  "import": {
+    "hello/B": "",
+    "hello/A": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/circle_pkg_AB_001_test.in/moon.mod.json b/crates/moon/tests/test_cases/circle_pkg_AB_001_test.in/moon.mod.json
new file mode 100644
index 00000000..61113747
--- /dev/null
+++ b/crates/moon/tests/test_cases/circle_pkg_AB_001_test.in/moon.mod.json
@@ -0,0 +1,3 @@
+{
+  "name": "hello"
+}
diff --git a/crates/moon/tests/test_cases/core_order.in/.gitignore b/crates/moon/tests/test_cases/core_order.in/.gitignore
new file mode 100644
index 00000000..b1283a74
--- /dev/null
+++ b/crates/moon/tests/test_cases/core_order.in/.gitignore
@@ -0,0 +1,2 @@
+target/
+.mooncakes/
diff --git a/crates/moon/tests/test_cases/core_order.in/A/a.mbt b/crates/moon/tests/test_cases/core_order.in/A/a.mbt
new file mode 100644
index 00000000..0e9776d8
--- /dev/null
+++ b/crates/moon/tests/test_cases/core_order.in/A/a.mbt
@@ -0,0 +1,11 @@
+pub fn a() -> String {
+  "a"
+}
+
+test "inline test a.mbt" {
+  println("inline test in a.mbt")
+}
+
+fn init {
+  println("init a.mbt")
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/core_order.in/A/a_wbtest.mbt b/crates/moon/tests/test_cases/core_order.in/A/a_wbtest.mbt
new file mode 100644
index 00000000..965778a9
--- /dev/null
+++ b/crates/moon/tests/test_cases/core_order.in/A/a_wbtest.mbt
@@ -0,0 +1,7 @@
+test "inline test a_test.mbt" {
+  println("inline test a_test.mbt")
+}
+
+fn init {
+  println("init a_test.mbt")
+}
diff --git a/crates/moon/tests/test_cases/core_order.in/A/moon.pkg.json b/crates/moon/tests/test_cases/core_order.in/A/moon.pkg.json
new file mode 100644
index 00000000..f7e8d7a9
--- /dev/null
+++ b/crates/moon/tests/test_cases/core_order.in/A/moon.pkg.json
@@ -0,0 +1,5 @@
+{
+    "import": [
+        "lijunchen/hello/T"
+    ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/core_order.in/B/b.mbt b/crates/moon/tests/test_cases/core_order.in/B/b.mbt
new file mode 100644
index 00000000..51a17f10
--- /dev/null
+++ b/crates/moon/tests/test_cases/core_order.in/B/b.mbt
@@ -0,0 +1,11 @@
+pub fn b() -> String {
+  "b"
+}
+
+test "inline test b.mbt" {
+  println("inline test in b.mbt")
+}
+
+fn init {
+  println("init b.mbt")
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/core_order.in/B/b_wbtest.mbt b/crates/moon/tests/test_cases/core_order.in/B/b_wbtest.mbt
new file mode 100644
index 00000000..aab7995d
--- /dev/null
+++ b/crates/moon/tests/test_cases/core_order.in/B/b_wbtest.mbt
@@ -0,0 +1,7 @@
+test "inline test b_test.mbt" {
+  println("inline test b_test.mbt")
+}
+
+fn init {
+  println("init b_test.mbt")
+}
diff --git a/crates/moon/tests/test_cases/core_order.in/B/moon.pkg.json b/crates/moon/tests/test_cases/core_order.in/B/moon.pkg.json
new file mode 100644
index 00000000..f7e8d7a9
--- /dev/null
+++ b/crates/moon/tests/test_cases/core_order.in/B/moon.pkg.json
@@ -0,0 +1,5 @@
+{
+    "import": [
+        "lijunchen/hello/T"
+    ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/core_order.in/T/moon.pkg.json b/crates/moon/tests/test_cases/core_order.in/T/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/core_order.in/T/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/core_order.in/T/t.mbt b/crates/moon/tests/test_cases/core_order.in/T/t.mbt
new file mode 100644
index 00000000..16711abd
--- /dev/null
+++ b/crates/moon/tests/test_cases/core_order.in/T/t.mbt
@@ -0,0 +1,11 @@
+pub fn t() -> String {
+  "T"
+}
+
+test "inline test t.mbt" {
+  println("inline test in t.mbt")
+}
+
+fn init {
+  println("init t.mbt")
+}
diff --git a/crates/moon/tests/test_cases/core_order.in/T/t_wbtest.mbt b/crates/moon/tests/test_cases/core_order.in/T/t_wbtest.mbt
new file mode 100644
index 00000000..4d4f52e1
--- /dev/null
+++ b/crates/moon/tests/test_cases/core_order.in/T/t_wbtest.mbt
@@ -0,0 +1,8 @@
+test "inline test t_test.mbt" {
+  t()
+  println("inline test t_test.mbt")
+}
+
+fn init {
+  println("init t_test.mbt")
+}
diff --git a/crates/moon/tests/test_cases/core_order.in/main/main.mbt b/crates/moon/tests/test_cases/core_order.in/main/main.mbt
new file mode 100644
index 00000000..d72b9c5b
--- /dev/null
+++ b/crates/moon/tests/test_cases/core_order.in/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println("init main.mbt")
+}
diff --git a/crates/moon/tests/test_cases/core_order.in/main/moon.pkg.json b/crates/moon/tests/test_cases/core_order.in/main/moon.pkg.json
new file mode 100644
index 00000000..268d794e
--- /dev/null
+++ b/crates/moon/tests/test_cases/core_order.in/main/moon.pkg.json
@@ -0,0 +1,7 @@
+{
+  "is-main": true,
+  "import": [
+    "lijunchen/hello/A",
+    "lijunchen/hello/B"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/core_order.in/moon.mod.json b/crates/moon/tests/test_cases/core_order.in/moon.mod.json
new file mode 100644
index 00000000..8380388a
--- /dev/null
+++ b/crates/moon/tests/test_cases/core_order.in/moon.mod.json
@@ -0,0 +1,5 @@
+{
+  "name": "lijunchen/hello",
+  "version": "0.1.0",
+  "deps": {}
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/debug_flag_test.in/lib/hello.mbt b/crates/moon/tests/test_cases/debug_flag_test.in/lib/hello.mbt
new file mode 100644
index 00000000..a7ac2bee
--- /dev/null
+++ b/crates/moon/tests/test_cases/debug_flag_test.in/lib/hello.mbt
@@ -0,0 +1,4 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
+
diff --git a/crates/moon/tests/test_cases/debug_flag_test.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/debug_flag_test.in/lib/moon.pkg.json
new file mode 100644
index 00000000..0967ef42
--- /dev/null
+++ b/crates/moon/tests/test_cases/debug_flag_test.in/lib/moon.pkg.json
@@ -0,0 +1 @@
+{}
diff --git a/crates/moon/tests/test_cases/debug_flag_test.in/main/main.mbt b/crates/moon/tests/test_cases/debug_flag_test.in/main/main.mbt
new file mode 100644
index 00000000..d25cb935
--- /dev/null
+++ b/crates/moon/tests/test_cases/debug_flag_test.in/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println(@lib.hello())
+}
diff --git a/crates/moon/tests/test_cases/debug_flag_test.in/main/moon.pkg.json b/crates/moon/tests/test_cases/debug_flag_test.in/main/moon.pkg.json
new file mode 100644
index 00000000..0dccc0db
--- /dev/null
+++ b/crates/moon/tests/test_cases/debug_flag_test.in/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": {
+    "hello/lib": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/debug_flag_test.in/moon.mod.json b/crates/moon/tests/test_cases/debug_flag_test.in/moon.mod.json
new file mode 100644
index 00000000..61113747
--- /dev/null
+++ b/crates/moon/tests/test_cases/debug_flag_test.in/moon.mod.json
@@ -0,0 +1,3 @@
+{
+  "name": "hello"
+}
diff --git a/crates/moon/tests/test_cases/design.in/lib/list/lib.mbt b/crates/moon/tests/test_cases/design.in/lib/list/lib.mbt
new file mode 100644
index 00000000..ae9f6590
--- /dev/null
+++ b/crates/moon/tests/test_cases/design.in/lib/list/lib.mbt
@@ -0,0 +1,3 @@
+pub fn new_list() -> Unit {
+  println("new_list")
+}
diff --git a/crates/moon/tests/test_cases/design.in/lib/list/moon.pkg.json b/crates/moon/tests/test_cases/design.in/lib/list/moon.pkg.json
new file mode 100644
index 00000000..9585a087
--- /dev/null
+++ b/crates/moon/tests/test_cases/design.in/lib/list/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
diff --git a/crates/moon/tests/test_cases/design.in/lib/queue/lib.mbt b/crates/moon/tests/test_cases/design.in/lib/queue/lib.mbt
new file mode 100644
index 00000000..9e4b781d
--- /dev/null
+++ b/crates/moon/tests/test_cases/design.in/lib/queue/lib.mbt
@@ -0,0 +1,4 @@
+pub fn new_queue() -> Unit {
+  @list.new_list()
+  println("new_queue")
+}
diff --git a/crates/moon/tests/test_cases/design.in/lib/queue/moon.pkg.json b/crates/moon/tests/test_cases/design.in/lib/queue/moon.pkg.json
new file mode 100644
index 00000000..e2428e71
--- /dev/null
+++ b/crates/moon/tests/test_cases/design.in/lib/queue/moon.pkg.json
@@ -0,0 +1,5 @@
+{
+  "import": {
+    "moonbit/design/lib/list": ""
+  }
+}
diff --git a/crates/moon/tests/test_cases/design.in/lib/stack/lib.mbt b/crates/moon/tests/test_cases/design.in/lib/stack/lib.mbt
new file mode 100644
index 00000000..6b117b69
--- /dev/null
+++ b/crates/moon/tests/test_cases/design.in/lib/stack/lib.mbt
@@ -0,0 +1,4 @@
+pub fn new_stack() -> Unit {
+  @list.new_list()
+  println("new_stack")
+}
diff --git a/crates/moon/tests/test_cases/design.in/lib/stack/moon.pkg.json b/crates/moon/tests/test_cases/design.in/lib/stack/moon.pkg.json
new file mode 100644
index 00000000..e2428e71
--- /dev/null
+++ b/crates/moon/tests/test_cases/design.in/lib/stack/moon.pkg.json
@@ -0,0 +1,5 @@
+{
+  "import": {
+    "moonbit/design/lib/list": ""
+  }
+}
diff --git a/crates/moon/tests/test_cases/design.in/lib/vec/lib.mbt b/crates/moon/tests/test_cases/design.in/lib/vec/lib.mbt
new file mode 100644
index 00000000..198ee74b
--- /dev/null
+++ b/crates/moon/tests/test_cases/design.in/lib/vec/lib.mbt
@@ -0,0 +1,3 @@
+pub fn new_vector() -> Unit {
+  println("new_vector")
+}
diff --git a/crates/moon/tests/test_cases/design.in/lib/vec/moon.pkg.json b/crates/moon/tests/test_cases/design.in/lib/vec/moon.pkg.json
new file mode 100644
index 00000000..9585a087
--- /dev/null
+++ b/crates/moon/tests/test_cases/design.in/lib/vec/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
diff --git a/crates/moon/tests/test_cases/design.in/lib/vec/vec.mbt b/crates/moon/tests/test_cases/design.in/lib/vec/vec.mbt
new file mode 100644
index 00000000..ce25d994
--- /dev/null
+++ b/crates/moon/tests/test_cases/design.in/lib/vec/vec.mbt
@@ -0,0 +1,3 @@
+fn init {
+  ()
+}
diff --git a/crates/moon/tests/test_cases/design.in/main1/main.mbt b/crates/moon/tests/test_cases/design.in/main1/main.mbt
new file mode 100644
index 00000000..6186bf38
--- /dev/null
+++ b/crates/moon/tests/test_cases/design.in/main1/main.mbt
@@ -0,0 +1,6 @@
+fn main {
+  @queue.new_queue()
+  @stack.new_stack()
+  @vec.new_vector()
+  println("main1")
+}
diff --git a/crates/moon/tests/test_cases/design.in/main1/moon.pkg.json b/crates/moon/tests/test_cases/design.in/main1/moon.pkg.json
new file mode 100644
index 00000000..36d11645
--- /dev/null
+++ b/crates/moon/tests/test_cases/design.in/main1/moon.pkg.json
@@ -0,0 +1,8 @@
+{
+  "is-main": true,
+  "import": {
+    "moonbit/design/lib/queue": "",
+    "moonbit/design/lib/stack": "",
+    "moonbit/design/lib/vec": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/design.in/main2/main.mbt b/crates/moon/tests/test_cases/design.in/main2/main.mbt
new file mode 100644
index 00000000..8c0279c6
--- /dev/null
+++ b/crates/moon/tests/test_cases/design.in/main2/main.mbt
@@ -0,0 +1,4 @@
+fn main {
+  @queue.new_queue()
+  println("main2")
+}
diff --git a/crates/moon/tests/test_cases/design.in/main2/moon.pkg.json b/crates/moon/tests/test_cases/design.in/main2/moon.pkg.json
new file mode 100644
index 00000000..bce63d40
--- /dev/null
+++ b/crates/moon/tests/test_cases/design.in/main2/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": {
+    "moonbit/design/lib/queue": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/design.in/moon.mod.json b/crates/moon/tests/test_cases/design.in/moon.mod.json
new file mode 100644
index 00000000..9988b54f
--- /dev/null
+++ b/crates/moon/tests/test_cases/design.in/moon.mod.json
@@ -0,0 +1,3 @@
+{
+  "name": "moonbit/design"
+}
diff --git a/crates/moon/tests/test_cases/diamond-pkg-001.in/A/lib.mbt b/crates/moon/tests/test_cases/diamond-pkg-001.in/A/lib.mbt
new file mode 100644
index 00000000..0c8ba57d
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-001.in/A/lib.mbt
@@ -0,0 +1,3 @@
+pub fn f() -> Unit {
+  println("A")
+}
diff --git a/crates/moon/tests/test_cases/diamond-pkg-001.in/A/moon.pkg.json b/crates/moon/tests/test_cases/diamond-pkg-001.in/A/moon.pkg.json
new file mode 100644
index 00000000..72eb22fe
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-001.in/A/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/diamond-pkg-001.in/B/lib.mbt b/crates/moon/tests/test_cases/diamond-pkg-001.in/B/lib.mbt
new file mode 100644
index 00000000..98f4a947
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-001.in/B/lib.mbt
@@ -0,0 +1,4 @@
+pub fn f() -> Unit {
+  @A.f()
+  println("B")
+}
diff --git a/crates/moon/tests/test_cases/diamond-pkg-001.in/B/moon.pkg.json b/crates/moon/tests/test_cases/diamond-pkg-001.in/B/moon.pkg.json
new file mode 100644
index 00000000..d83e82ab
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-001.in/B/moon.pkg.json
@@ -0,0 +1,5 @@
+{
+  "import": {
+    "hello/A": ""
+  }
+}
diff --git a/crates/moon/tests/test_cases/diamond-pkg-001.in/C/lib.mbt b/crates/moon/tests/test_cases/diamond-pkg-001.in/C/lib.mbt
new file mode 100644
index 00000000..8695ab4c
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-001.in/C/lib.mbt
@@ -0,0 +1,4 @@
+pub fn f() -> Unit {
+  @A.f()
+  println("C")
+}
diff --git a/crates/moon/tests/test_cases/diamond-pkg-001.in/C/moon.pkg.json b/crates/moon/tests/test_cases/diamond-pkg-001.in/C/moon.pkg.json
new file mode 100644
index 00000000..d83e82ab
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-001.in/C/moon.pkg.json
@@ -0,0 +1,5 @@
+{
+  "import": {
+    "hello/A": ""
+  }
+}
diff --git a/crates/moon/tests/test_cases/diamond-pkg-001.in/main/main.mbt b/crates/moon/tests/test_cases/diamond-pkg-001.in/main/main.mbt
new file mode 100644
index 00000000..05100981
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-001.in/main/main.mbt
@@ -0,0 +1,5 @@
+fn main {
+  @B.f()
+  @C.f()
+  println("main")
+}
diff --git a/crates/moon/tests/test_cases/diamond-pkg-001.in/main/moon.pkg.json b/crates/moon/tests/test_cases/diamond-pkg-001.in/main/moon.pkg.json
new file mode 100644
index 00000000..5de00572
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-001.in/main/moon.pkg.json
@@ -0,0 +1,7 @@
+{
+  "is-main": true,
+  "import": {
+    "hello/C": "",
+    "hello/B": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/diamond-pkg-001.in/moon.mod.json b/crates/moon/tests/test_cases/diamond-pkg-001.in/moon.mod.json
new file mode 100644
index 00000000..61113747
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-001.in/moon.mod.json
@@ -0,0 +1,3 @@
+{
+  "name": "hello"
+}
diff --git a/crates/moon/tests/test_cases/diamond-pkg-002.in/A/A0/lib.mbt b/crates/moon/tests/test_cases/diamond-pkg-002.in/A/A0/lib.mbt
new file mode 100644
index 00000000..052f418d
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-002.in/A/A0/lib.mbt
@@ -0,0 +1,3 @@
+pub fn f() -> Unit {
+  println("A0")
+}
diff --git a/crates/moon/tests/test_cases/diamond-pkg-002.in/A/A0/moon.pkg.json b/crates/moon/tests/test_cases/diamond-pkg-002.in/A/A0/moon.pkg.json
new file mode 100644
index 00000000..72eb22fe
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-002.in/A/A0/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/diamond-pkg-002.in/A/A1/lib.mbt b/crates/moon/tests/test_cases/diamond-pkg-002.in/A/A1/lib.mbt
new file mode 100644
index 00000000..22121685
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-002.in/A/A1/lib.mbt
@@ -0,0 +1,3 @@
+pub fn f() -> Unit {
+  println("A1")
+}
diff --git a/crates/moon/tests/test_cases/diamond-pkg-002.in/A/A1/moon.pkg.json b/crates/moon/tests/test_cases/diamond-pkg-002.in/A/A1/moon.pkg.json
new file mode 100644
index 00000000..72eb22fe
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-002.in/A/A1/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/diamond-pkg-002.in/A/A2/lib.mbt b/crates/moon/tests/test_cases/diamond-pkg-002.in/A/A2/lib.mbt
new file mode 100644
index 00000000..be443419
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-002.in/A/A2/lib.mbt
@@ -0,0 +1,3 @@
+pub fn f() -> Unit {
+  println("A2")
+}
diff --git a/crates/moon/tests/test_cases/diamond-pkg-002.in/A/A2/moon.pkg.json b/crates/moon/tests/test_cases/diamond-pkg-002.in/A/A2/moon.pkg.json
new file mode 100644
index 00000000..72eb22fe
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-002.in/A/A2/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/diamond-pkg-002.in/A/lib.mbt b/crates/moon/tests/test_cases/diamond-pkg-002.in/A/lib.mbt
new file mode 100644
index 00000000..1e03bcdf
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-002.in/A/lib.mbt
@@ -0,0 +1,6 @@
+pub fn f() -> Unit {
+  @A0.f()
+  @A1.f()
+  @A2.f()
+  println("A")
+}
diff --git a/crates/moon/tests/test_cases/diamond-pkg-002.in/A/moon.pkg.json b/crates/moon/tests/test_cases/diamond-pkg-002.in/A/moon.pkg.json
new file mode 100644
index 00000000..914289e1
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-002.in/A/moon.pkg.json
@@ -0,0 +1,7 @@
+{
+  "import": {
+    "hello/A/A2": "",
+    "hello/A/A1": "",
+    "hello/A/A0": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/diamond-pkg-002.in/B/B0/lib.mbt b/crates/moon/tests/test_cases/diamond-pkg-002.in/B/B0/lib.mbt
new file mode 100644
index 00000000..1f6e9b99
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-002.in/B/B0/lib.mbt
@@ -0,0 +1,3 @@
+pub fn f() -> Unit {
+  println("B0")
+}
diff --git a/crates/moon/tests/test_cases/diamond-pkg-002.in/B/B0/moon.pkg.json b/crates/moon/tests/test_cases/diamond-pkg-002.in/B/B0/moon.pkg.json
new file mode 100644
index 00000000..72eb22fe
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-002.in/B/B0/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/diamond-pkg-002.in/B/B1/lib.mbt b/crates/moon/tests/test_cases/diamond-pkg-002.in/B/B1/lib.mbt
new file mode 100644
index 00000000..c96e7b42
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-002.in/B/B1/lib.mbt
@@ -0,0 +1,3 @@
+pub fn f() -> Unit {
+  println("B1")
+}
diff --git a/crates/moon/tests/test_cases/diamond-pkg-002.in/B/B1/moon.pkg.json b/crates/moon/tests/test_cases/diamond-pkg-002.in/B/B1/moon.pkg.json
new file mode 100644
index 00000000..72eb22fe
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-002.in/B/B1/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/diamond-pkg-002.in/B/B2/lib.mbt b/crates/moon/tests/test_cases/diamond-pkg-002.in/B/B2/lib.mbt
new file mode 100644
index 00000000..73ff3452
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-002.in/B/B2/lib.mbt
@@ -0,0 +1,3 @@
+pub fn f() -> Unit {
+  println("B2")
+}
diff --git a/crates/moon/tests/test_cases/diamond-pkg-002.in/B/B2/moon.pkg.json b/crates/moon/tests/test_cases/diamond-pkg-002.in/B/B2/moon.pkg.json
new file mode 100644
index 00000000..72eb22fe
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-002.in/B/B2/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/diamond-pkg-002.in/B/lib.mbt b/crates/moon/tests/test_cases/diamond-pkg-002.in/B/lib.mbt
new file mode 100644
index 00000000..0873543f
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-002.in/B/lib.mbt
@@ -0,0 +1,7 @@
+pub fn f() -> Unit {
+  @A.f()
+  @B0.f()
+  @B1.f()
+  @B2.f()
+  println("B")
+}
diff --git a/crates/moon/tests/test_cases/diamond-pkg-002.in/B/moon.pkg.json b/crates/moon/tests/test_cases/diamond-pkg-002.in/B/moon.pkg.json
new file mode 100644
index 00000000..5d970856
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-002.in/B/moon.pkg.json
@@ -0,0 +1,8 @@
+{
+  "import": {
+    "hello/B/B1": "",
+    "hello/B/B0": "",
+    "hello/A": "",
+    "hello/B/B2": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/diamond-pkg-002.in/C/C0/lib.mbt b/crates/moon/tests/test_cases/diamond-pkg-002.in/C/C0/lib.mbt
new file mode 100644
index 00000000..6e4773fe
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-002.in/C/C0/lib.mbt
@@ -0,0 +1,3 @@
+pub fn f() -> Unit {
+  println("C0")
+}
diff --git a/crates/moon/tests/test_cases/diamond-pkg-002.in/C/C0/moon.pkg.json b/crates/moon/tests/test_cases/diamond-pkg-002.in/C/C0/moon.pkg.json
new file mode 100644
index 00000000..72eb22fe
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-002.in/C/C0/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/diamond-pkg-002.in/C/C1/lib.mbt b/crates/moon/tests/test_cases/diamond-pkg-002.in/C/C1/lib.mbt
new file mode 100644
index 00000000..7a299a8a
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-002.in/C/C1/lib.mbt
@@ -0,0 +1,3 @@
+pub fn f() -> Unit {
+  println("C1")
+}
diff --git a/crates/moon/tests/test_cases/diamond-pkg-002.in/C/C1/moon.pkg.json b/crates/moon/tests/test_cases/diamond-pkg-002.in/C/C1/moon.pkg.json
new file mode 100644
index 00000000..72eb22fe
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-002.in/C/C1/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/diamond-pkg-002.in/C/C2/lib.mbt b/crates/moon/tests/test_cases/diamond-pkg-002.in/C/C2/lib.mbt
new file mode 100644
index 00000000..22bd696b
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-002.in/C/C2/lib.mbt
@@ -0,0 +1,3 @@
+pub fn f() -> Unit {
+  println("C2")
+}
diff --git a/crates/moon/tests/test_cases/diamond-pkg-002.in/C/C2/moon.pkg.json b/crates/moon/tests/test_cases/diamond-pkg-002.in/C/C2/moon.pkg.json
new file mode 100644
index 00000000..72eb22fe
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-002.in/C/C2/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/diamond-pkg-002.in/C/lib.mbt b/crates/moon/tests/test_cases/diamond-pkg-002.in/C/lib.mbt
new file mode 100644
index 00000000..356abda2
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-002.in/C/lib.mbt
@@ -0,0 +1,7 @@
+pub fn f() -> Unit {
+  @A.f()
+  @C0.f()
+  @C1.f()
+  @C2.f()
+  println("C")
+}
diff --git a/crates/moon/tests/test_cases/diamond-pkg-002.in/C/moon.pkg.json b/crates/moon/tests/test_cases/diamond-pkg-002.in/C/moon.pkg.json
new file mode 100644
index 00000000..f479a60a
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-002.in/C/moon.pkg.json
@@ -0,0 +1,8 @@
+{
+  "import": {
+    "hello/A": "",
+    "hello/C/C2": "",
+    "hello/C/C1": "",
+    "hello/C/C0": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/diamond-pkg-002.in/main/main.mbt b/crates/moon/tests/test_cases/diamond-pkg-002.in/main/main.mbt
new file mode 100644
index 00000000..05100981
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-002.in/main/main.mbt
@@ -0,0 +1,5 @@
+fn main {
+  @B.f()
+  @C.f()
+  println("main")
+}
diff --git a/crates/moon/tests/test_cases/diamond-pkg-002.in/main/moon.pkg.json b/crates/moon/tests/test_cases/diamond-pkg-002.in/main/moon.pkg.json
new file mode 100644
index 00000000..5de00572
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-002.in/main/moon.pkg.json
@@ -0,0 +1,7 @@
+{
+  "is-main": true,
+  "import": {
+    "hello/C": "",
+    "hello/B": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/diamond-pkg-002.in/moon.mod.json b/crates/moon/tests/test_cases/diamond-pkg-002.in/moon.mod.json
new file mode 100644
index 00000000..61113747
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-002.in/moon.mod.json
@@ -0,0 +1,3 @@
+{
+  "name": "hello"
+}
diff --git a/crates/moon/tests/test_cases/diamond-pkg-003.in/A/A0/lib.mbt b/crates/moon/tests/test_cases/diamond-pkg-003.in/A/A0/lib.mbt
new file mode 100644
index 00000000..052f418d
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-003.in/A/A0/lib.mbt
@@ -0,0 +1,3 @@
+pub fn f() -> Unit {
+  println("A0")
+}
diff --git a/crates/moon/tests/test_cases/diamond-pkg-003.in/A/A0/moon.pkg.json b/crates/moon/tests/test_cases/diamond-pkg-003.in/A/A0/moon.pkg.json
new file mode 100644
index 00000000..72eb22fe
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-003.in/A/A0/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/diamond-pkg-003.in/A/A1/lib.mbt b/crates/moon/tests/test_cases/diamond-pkg-003.in/A/A1/lib.mbt
new file mode 100644
index 00000000..22121685
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-003.in/A/A1/lib.mbt
@@ -0,0 +1,3 @@
+pub fn f() -> Unit {
+  println("A1")
+}
diff --git a/crates/moon/tests/test_cases/diamond-pkg-003.in/A/A1/moon.pkg.json b/crates/moon/tests/test_cases/diamond-pkg-003.in/A/A1/moon.pkg.json
new file mode 100644
index 00000000..72eb22fe
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-003.in/A/A1/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/diamond-pkg-003.in/A/A2/lib.mbt b/crates/moon/tests/test_cases/diamond-pkg-003.in/A/A2/lib.mbt
new file mode 100644
index 00000000..be443419
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-003.in/A/A2/lib.mbt
@@ -0,0 +1,3 @@
+pub fn f() -> Unit {
+  println("A2")
+}
diff --git a/crates/moon/tests/test_cases/diamond-pkg-003.in/A/A2/moon.pkg.json b/crates/moon/tests/test_cases/diamond-pkg-003.in/A/A2/moon.pkg.json
new file mode 100644
index 00000000..72eb22fe
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-003.in/A/A2/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/diamond-pkg-003.in/A/lib.mbt b/crates/moon/tests/test_cases/diamond-pkg-003.in/A/lib.mbt
new file mode 100644
index 00000000..1e03bcdf
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-003.in/A/lib.mbt
@@ -0,0 +1,6 @@
+pub fn f() -> Unit {
+  @A0.f()
+  @A1.f()
+  @A2.f()
+  println("A")
+}
diff --git a/crates/moon/tests/test_cases/diamond-pkg-003.in/A/moon.pkg.json b/crates/moon/tests/test_cases/diamond-pkg-003.in/A/moon.pkg.json
new file mode 100644
index 00000000..a91719ea
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-003.in/A/moon.pkg.json
@@ -0,0 +1,7 @@
+{
+  "import": {
+    "h/e/l/l/o/A/A2": "",
+    "h/e/l/l/o/A/A0": "",
+    "h/e/l/l/o/A/A1": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/diamond-pkg-003.in/B/B0/lib.mbt b/crates/moon/tests/test_cases/diamond-pkg-003.in/B/B0/lib.mbt
new file mode 100644
index 00000000..1f6e9b99
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-003.in/B/B0/lib.mbt
@@ -0,0 +1,3 @@
+pub fn f() -> Unit {
+  println("B0")
+}
diff --git a/crates/moon/tests/test_cases/diamond-pkg-003.in/B/B0/moon.pkg.json b/crates/moon/tests/test_cases/diamond-pkg-003.in/B/B0/moon.pkg.json
new file mode 100644
index 00000000..72eb22fe
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-003.in/B/B0/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/diamond-pkg-003.in/B/B1/lib.mbt b/crates/moon/tests/test_cases/diamond-pkg-003.in/B/B1/lib.mbt
new file mode 100644
index 00000000..c96e7b42
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-003.in/B/B1/lib.mbt
@@ -0,0 +1,3 @@
+pub fn f() -> Unit {
+  println("B1")
+}
diff --git a/crates/moon/tests/test_cases/diamond-pkg-003.in/B/B1/moon.pkg.json b/crates/moon/tests/test_cases/diamond-pkg-003.in/B/B1/moon.pkg.json
new file mode 100644
index 00000000..72eb22fe
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-003.in/B/B1/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/diamond-pkg-003.in/B/B2/lib.mbt b/crates/moon/tests/test_cases/diamond-pkg-003.in/B/B2/lib.mbt
new file mode 100644
index 00000000..73ff3452
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-003.in/B/B2/lib.mbt
@@ -0,0 +1,3 @@
+pub fn f() -> Unit {
+  println("B2")
+}
diff --git a/crates/moon/tests/test_cases/diamond-pkg-003.in/B/B2/moon.pkg.json b/crates/moon/tests/test_cases/diamond-pkg-003.in/B/B2/moon.pkg.json
new file mode 100644
index 00000000..72eb22fe
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-003.in/B/B2/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/diamond-pkg-003.in/B/lib.mbt b/crates/moon/tests/test_cases/diamond-pkg-003.in/B/lib.mbt
new file mode 100644
index 00000000..0873543f
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-003.in/B/lib.mbt
@@ -0,0 +1,7 @@
+pub fn f() -> Unit {
+  @A.f()
+  @B0.f()
+  @B1.f()
+  @B2.f()
+  println("B")
+}
diff --git a/crates/moon/tests/test_cases/diamond-pkg-003.in/B/moon.pkg.json b/crates/moon/tests/test_cases/diamond-pkg-003.in/B/moon.pkg.json
new file mode 100644
index 00000000..cdcf8928
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-003.in/B/moon.pkg.json
@@ -0,0 +1,8 @@
+{
+  "import": {
+    "h/e/l/l/o/A": "",
+    "h/e/l/l/o/B/B0": "",
+    "h/e/l/l/o/B/B1": "",
+    "h/e/l/l/o/B/B2": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/diamond-pkg-003.in/C/C0/lib.mbt b/crates/moon/tests/test_cases/diamond-pkg-003.in/C/C0/lib.mbt
new file mode 100644
index 00000000..6e4773fe
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-003.in/C/C0/lib.mbt
@@ -0,0 +1,3 @@
+pub fn f() -> Unit {
+  println("C0")
+}
diff --git a/crates/moon/tests/test_cases/diamond-pkg-003.in/C/C0/moon.pkg.json b/crates/moon/tests/test_cases/diamond-pkg-003.in/C/C0/moon.pkg.json
new file mode 100644
index 00000000..72eb22fe
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-003.in/C/C0/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/diamond-pkg-003.in/C/C1/lib.mbt b/crates/moon/tests/test_cases/diamond-pkg-003.in/C/C1/lib.mbt
new file mode 100644
index 00000000..7a299a8a
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-003.in/C/C1/lib.mbt
@@ -0,0 +1,3 @@
+pub fn f() -> Unit {
+  println("C1")
+}
diff --git a/crates/moon/tests/test_cases/diamond-pkg-003.in/C/C1/moon.pkg.json b/crates/moon/tests/test_cases/diamond-pkg-003.in/C/C1/moon.pkg.json
new file mode 100644
index 00000000..72eb22fe
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-003.in/C/C1/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/diamond-pkg-003.in/C/C2/lib.mbt b/crates/moon/tests/test_cases/diamond-pkg-003.in/C/C2/lib.mbt
new file mode 100644
index 00000000..22bd696b
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-003.in/C/C2/lib.mbt
@@ -0,0 +1,3 @@
+pub fn f() -> Unit {
+  println("C2")
+}
diff --git a/crates/moon/tests/test_cases/diamond-pkg-003.in/C/C2/moon.pkg.json b/crates/moon/tests/test_cases/diamond-pkg-003.in/C/C2/moon.pkg.json
new file mode 100644
index 00000000..72eb22fe
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-003.in/C/C2/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/diamond-pkg-003.in/C/lib.mbt b/crates/moon/tests/test_cases/diamond-pkg-003.in/C/lib.mbt
new file mode 100644
index 00000000..356abda2
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-003.in/C/lib.mbt
@@ -0,0 +1,7 @@
+pub fn f() -> Unit {
+  @A.f()
+  @C0.f()
+  @C1.f()
+  @C2.f()
+  println("C")
+}
diff --git a/crates/moon/tests/test_cases/diamond-pkg-003.in/C/moon.pkg.json b/crates/moon/tests/test_cases/diamond-pkg-003.in/C/moon.pkg.json
new file mode 100644
index 00000000..bbc402cb
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-003.in/C/moon.pkg.json
@@ -0,0 +1,8 @@
+{
+  "import": {
+    "h/e/l/l/o/C/C1": "",
+    "h/e/l/l/o/C/C2": "",
+    "h/e/l/l/o/C/C0": "",
+    "h/e/l/l/o/A": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/diamond-pkg-003.in/main/main.mbt b/crates/moon/tests/test_cases/diamond-pkg-003.in/main/main.mbt
new file mode 100644
index 00000000..05100981
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-003.in/main/main.mbt
@@ -0,0 +1,5 @@
+fn main {
+  @B.f()
+  @C.f()
+  println("main")
+}
diff --git a/crates/moon/tests/test_cases/diamond-pkg-003.in/main/moon.pkg.json b/crates/moon/tests/test_cases/diamond-pkg-003.in/main/moon.pkg.json
new file mode 100644
index 00000000..bc405362
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-003.in/main/moon.pkg.json
@@ -0,0 +1,7 @@
+{
+  "is-main": true,
+  "import": {
+    "h/e/l/l/o/C": "",
+    "h/e/l/l/o/B": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/diamond-pkg-003.in/moon.mod.json b/crates/moon/tests/test_cases/diamond-pkg-003.in/moon.mod.json
new file mode 100644
index 00000000..7d9a8e31
--- /dev/null
+++ b/crates/moon/tests/test_cases/diamond-pkg-003.in/moon.mod.json
@@ -0,0 +1,3 @@
+{
+  "name": "h/e/l/l/o"
+}
diff --git a/crates/moon/tests/test_cases/docstring-demo.in/README.md b/crates/moon/tests/test_cases/docstring-demo.in/README.md
new file mode 100644
index 00000000..4e4cb239
--- /dev/null
+++ b/crates/moon/tests/test_cases/docstring-demo.in/README.md
@@ -0,0 +1,5 @@
+## Moonbit docstring demo
+
+We can see the docstring display in the IDE as follows:
+
+<img width="480" src="imgs/docs.jpg">
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/docstring-demo.in/lib/hello.mbt b/crates/moon/tests/test_cases/docstring-demo.in/lib/hello.mbt
new file mode 100644
index 00000000..c4059f55
--- /dev/null
+++ b/crates/moon/tests/test_cases/docstring-demo.in/lib/hello.mbt
@@ -0,0 +1,9 @@
+/// Generate a friendly greeting message.
+///
+/// This function return the string "Hello, world!" followed by a newline character.
+///
+/// @return {String} A string containing the greeting message.
+pub fn hello() -> String {
+  "Hello, world!"
+}
+
diff --git a/crates/moon/tests/test_cases/docstring-demo.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/docstring-demo.in/lib/moon.pkg.json
new file mode 100644
index 00000000..9585a087
--- /dev/null
+++ b/crates/moon/tests/test_cases/docstring-demo.in/lib/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
diff --git a/crates/moon/tests/test_cases/docstring-demo.in/main/main.mbt b/crates/moon/tests/test_cases/docstring-demo.in/main/main.mbt
new file mode 100644
index 00000000..d25cb935
--- /dev/null
+++ b/crates/moon/tests/test_cases/docstring-demo.in/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println(@lib.hello())
+}
diff --git a/crates/moon/tests/test_cases/docstring-demo.in/main/moon.pkg.json b/crates/moon/tests/test_cases/docstring-demo.in/main/moon.pkg.json
new file mode 100644
index 00000000..def7976c
--- /dev/null
+++ b/crates/moon/tests/test_cases/docstring-demo.in/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": {
+    "docstring-demo/lib": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/docstring-demo.in/moon.mod.json b/crates/moon/tests/test_cases/docstring-demo.in/moon.mod.json
new file mode 100644
index 00000000..6f95aac0
--- /dev/null
+++ b/crates/moon/tests/test_cases/docstring-demo.in/moon.mod.json
@@ -0,0 +1,3 @@
+{
+  "name": "docstring-demo"
+}
diff --git a/crates/moon/tests/test_cases/dummy-core.in/0/lib.mbt b/crates/moon/tests/test_cases/dummy-core.in/0/lib.mbt
new file mode 100644
index 00000000..e69de29b
diff --git a/crates/moon/tests/test_cases/dummy-core.in/0/moon.pkg.json b/crates/moon/tests/test_cases/dummy-core.in/0/moon.pkg.json
new file mode 100644
index 00000000..280af610
--- /dev/null
+++ b/crates/moon/tests/test_cases/dummy-core.in/0/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "link": true
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/dummy-core.in/0/y.js.mbt b/crates/moon/tests/test_cases/dummy-core.in/0/y.js.mbt
new file mode 100644
index 00000000..e69de29b
diff --git a/crates/moon/tests/test_cases/dummy-core.in/0/y.wasm-gc.mbt b/crates/moon/tests/test_cases/dummy-core.in/0/y.wasm-gc.mbt
new file mode 100644
index 00000000..e69de29b
diff --git a/crates/moon/tests/test_cases/dummy-core.in/0/y.wasm.mbt b/crates/moon/tests/test_cases/dummy-core.in/0/y.wasm.mbt
new file mode 100644
index 00000000..e69de29b
diff --git a/crates/moon/tests/test_cases/dummy-core.in/0/y_wbtest.js.mbt b/crates/moon/tests/test_cases/dummy-core.in/0/y_wbtest.js.mbt
new file mode 100644
index 00000000..e69de29b
diff --git a/crates/moon/tests/test_cases/dummy-core.in/0/y_wbtest.mbt b/crates/moon/tests/test_cases/dummy-core.in/0/y_wbtest.mbt
new file mode 100644
index 00000000..e69de29b
diff --git a/crates/moon/tests/test_cases/dummy-core.in/0/y_wbtest.wasm-gc.mbt b/crates/moon/tests/test_cases/dummy-core.in/0/y_wbtest.wasm-gc.mbt
new file mode 100644
index 00000000..e69de29b
diff --git a/crates/moon/tests/test_cases/dummy-core.in/0/y_wbtest.wasm.mbt b/crates/moon/tests/test_cases/dummy-core.in/0/y_wbtest.wasm.mbt
new file mode 100644
index 00000000..e69de29b
diff --git a/crates/moon/tests/test_cases/dummy-core.in/1/lib.mbt b/crates/moon/tests/test_cases/dummy-core.in/1/lib.mbt
new file mode 100644
index 00000000..e69de29b
diff --git a/crates/moon/tests/test_cases/dummy-core.in/1/moon.pkg.json b/crates/moon/tests/test_cases/dummy-core.in/1/moon.pkg.json
new file mode 100644
index 00000000..280af610
--- /dev/null
+++ b/crates/moon/tests/test_cases/dummy-core.in/1/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "link": true
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/dummy-core.in/1/x.js.mbt b/crates/moon/tests/test_cases/dummy-core.in/1/x.js.mbt
new file mode 100644
index 00000000..e69de29b
diff --git a/crates/moon/tests/test_cases/dummy-core.in/1/x.wasm-gc.mbt b/crates/moon/tests/test_cases/dummy-core.in/1/x.wasm-gc.mbt
new file mode 100644
index 00000000..e69de29b
diff --git a/crates/moon/tests/test_cases/dummy-core.in/1/x.wasm.mbt b/crates/moon/tests/test_cases/dummy-core.in/1/x.wasm.mbt
new file mode 100644
index 00000000..e69de29b
diff --git a/crates/moon/tests/test_cases/dummy-core.in/1/x_wbtest.wasm-gc.mbt b/crates/moon/tests/test_cases/dummy-core.in/1/x_wbtest.wasm-gc.mbt
new file mode 100644
index 00000000..e69de29b
diff --git a/crates/moon/tests/test_cases/dummy-core.in/2/lib.mbt b/crates/moon/tests/test_cases/dummy-core.in/2/lib.mbt
new file mode 100644
index 00000000..e69de29b
diff --git a/crates/moon/tests/test_cases/dummy-core.in/2/moon.pkg.json b/crates/moon/tests/test_cases/dummy-core.in/2/moon.pkg.json
new file mode 100644
index 00000000..c4c92ba6
--- /dev/null
+++ b/crates/moon/tests/test_cases/dummy-core.in/2/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "link": true,
+  "import": [
+    "moonbitlang/core/1"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/dummy-core.in/char/moon.pkg.json b/crates/moon/tests/test_cases/dummy-core.in/char/moon.pkg.json
new file mode 100644
index 00000000..5aa1c638
--- /dev/null
+++ b/crates/moon/tests/test_cases/dummy-core.in/char/moon.pkg.json
@@ -0,0 +1,5 @@
+{
+  "import": [
+    "moonbitlang/core/coverage"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/dummy-core.in/coverage/moon.pkg.json b/crates/moon/tests/test_cases/dummy-core.in/coverage/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/dummy-core.in/coverage/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/dummy-core.in/iter/moon.pkg.json b/crates/moon/tests/test_cases/dummy-core.in/iter/moon.pkg.json
new file mode 100644
index 00000000..5136d392
--- /dev/null
+++ b/crates/moon/tests/test_cases/dummy-core.in/iter/moon.pkg.json
@@ -0,0 +1,8 @@
+{
+  "import": [
+    "moonbitlang/core/coverage"
+  ],
+  "wbtest-import": [
+    "moonbitlang/core/char"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/dummy-core.in/moon.mod.json b/crates/moon/tests/test_cases/dummy-core.in/moon.mod.json
new file mode 100644
index 00000000..1bfc8d8a
--- /dev/null
+++ b/crates/moon/tests/test_cases/dummy-core.in/moon.mod.json
@@ -0,0 +1,3 @@
+{
+  "name": "moonbitlang/core"
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/error_duplicate_alias.in/.gitignore b/crates/moon/tests/test_cases/error_duplicate_alias.in/.gitignore
new file mode 100644
index 00000000..b1283a74
--- /dev/null
+++ b/crates/moon/tests/test_cases/error_duplicate_alias.in/.gitignore
@@ -0,0 +1,2 @@
+target/
+.mooncakes/
diff --git a/crates/moon/tests/test_cases/error_duplicate_alias.in/lib/hello.mbt b/crates/moon/tests/test_cases/error_duplicate_alias.in/lib/hello.mbt
new file mode 100644
index 00000000..9012592a
--- /dev/null
+++ b/crates/moon/tests/test_cases/error_duplicate_alias.in/lib/hello.mbt
@@ -0,0 +1,3 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
diff --git a/crates/moon/tests/test_cases/error_duplicate_alias.in/lib/hello_wbtest.mbt b/crates/moon/tests/test_cases/error_duplicate_alias.in/lib/hello_wbtest.mbt
new file mode 100644
index 00000000..c9a46222
--- /dev/null
+++ b/crates/moon/tests/test_cases/error_duplicate_alias.in/lib/hello_wbtest.mbt
@@ -0,0 +1,5 @@
+test {
+  if hello() != "Hello, world!" {
+    abort("")
+  }
+}
diff --git a/crates/moon/tests/test_cases/error_duplicate_alias.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/error_duplicate_alias.in/lib/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/error_duplicate_alias.in/lib/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/error_duplicate_alias.in/lib2/hello.mbt b/crates/moon/tests/test_cases/error_duplicate_alias.in/lib2/hello.mbt
new file mode 100644
index 00000000..9012592a
--- /dev/null
+++ b/crates/moon/tests/test_cases/error_duplicate_alias.in/lib2/hello.mbt
@@ -0,0 +1,3 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
diff --git a/crates/moon/tests/test_cases/error_duplicate_alias.in/lib2/hello_wbtest.mbt b/crates/moon/tests/test_cases/error_duplicate_alias.in/lib2/hello_wbtest.mbt
new file mode 100644
index 00000000..c9a46222
--- /dev/null
+++ b/crates/moon/tests/test_cases/error_duplicate_alias.in/lib2/hello_wbtest.mbt
@@ -0,0 +1,5 @@
+test {
+  if hello() != "Hello, world!" {
+    abort("")
+  }
+}
diff --git a/crates/moon/tests/test_cases/error_duplicate_alias.in/lib2/moon.pkg.json b/crates/moon/tests/test_cases/error_duplicate_alias.in/lib2/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/error_duplicate_alias.in/lib2/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/error_duplicate_alias.in/main/main.mbt b/crates/moon/tests/test_cases/error_duplicate_alias.in/main/main.mbt
new file mode 100644
index 00000000..d25cb935
--- /dev/null
+++ b/crates/moon/tests/test_cases/error_duplicate_alias.in/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println(@lib.hello())
+}
diff --git a/crates/moon/tests/test_cases/error_duplicate_alias.in/main/moon.pkg.json b/crates/moon/tests/test_cases/error_duplicate_alias.in/main/moon.pkg.json
new file mode 100644
index 00000000..f8b2f095
--- /dev/null
+++ b/crates/moon/tests/test_cases/error_duplicate_alias.in/main/moon.pkg.json
@@ -0,0 +1,7 @@
+{
+  "is-main": true,
+  "import": {
+    "lijunchen/hello/lib": "",
+    "lijunchen/hello/lib2": "lib"
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/error_duplicate_alias.in/moon.mod.json b/crates/moon/tests/test_cases/error_duplicate_alias.in/moon.mod.json
new file mode 100644
index 00000000..8380388a
--- /dev/null
+++ b/crates/moon/tests/test_cases/error_duplicate_alias.in/moon.mod.json
@@ -0,0 +1,5 @@
+{
+  "name": "lijunchen/hello",
+  "version": "0.1.0",
+  "deps": {}
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/expect_test.in/.gitignore b/crates/moon/tests/test_cases/expect_test.in/.gitignore
new file mode 100644
index 00000000..b1283a74
--- /dev/null
+++ b/crates/moon/tests/test_cases/expect_test.in/.gitignore
@@ -0,0 +1,2 @@
+target/
+.mooncakes/
diff --git a/crates/moon/tests/test_cases/expect_test.in/README.md b/crates/moon/tests/test_cases/expect_test.in/README.md
new file mode 100644
index 00000000..ae00983f
--- /dev/null
+++ b/crates/moon/tests/test_cases/expect_test.in/README.md
@@ -0,0 +1 @@
+# username/hello
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/expect_test.in/lib/hello.mbt b/crates/moon/tests/test_cases/expect_test.in/lib/hello.mbt
new file mode 100644
index 00000000..08e48d0a
--- /dev/null
+++ b/crates/moon/tests/test_cases/expect_test.in/lib/hello.mbt
@@ -0,0 +1,153 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
+
+test "basic" {
+  let buf = Buffer::new()
+  let n = 123
+  buf.write_string(n.to_string())
+  buf.expect()!
+}
+
+test "indent" {
+  let _ = {
+    let buf = Buffer::new()
+    let s = "haha"
+    buf.write_string(s)
+    buf.expect()!
+  }
+  ()
+}
+
+test "auto_reset" {
+  let buf = Buffer::new()
+  let s = "haha"
+  buf.write_string(s)
+  buf.expect()!
+  let s = "123"
+  buf.write_string(s)
+  buf.expect(content="123")!
+}
+
+test "multiline-string" {
+  let buf = Buffer::new()
+  let s = "1\n2\n3\n"
+  buf.write_string(s)
+  buf.expect()!
+}
+
+test "multiline-string-2" {
+  let buf = Buffer::new()
+  let s =
+    #|abc
+    #|def
+  buf.write_string(s)
+  buf.expect(
+    content=
+      #|bcd
+      #|defg
+    ,
+  )!
+}
+
+test "not-empty-expect" {
+  let buf = Buffer::new()
+  buf.write_string("123")
+  buf.expect(content="1")!
+}
+
+test {
+  inspect("a")!
+}
+
+test {
+  inspect("a")!
+}
+
+test {
+  inspect("a", content="")!
+}
+
+test {
+  inspect("a", content="b")!
+}
+
+test {
+  inspect("a\nb\nc\ndc,")!
+}
+
+test {
+  (123 |> inspect)!
+}
+
+test {
+  (123 |> inspect(content=""))!
+}
+
+test {
+  ("a\nb\nc\n" |> inspect())!
+}
+
+test {
+  ("a\nb\nc\n" |> inspect(content=""))!
+}
+
+test {
+  ("a\nb\nc\n"
+  |> inspect(
+    content=
+      #|1
+      #|2
+      #|3
+    ,
+  ))!
+}
+
+test {
+  (("a\nb\nc\n" |> inspect(content=""))! |> inspect(content=""))!
+}
+
+test {
+  inspect("ha", content="哈哈")!
+}
+
+test {
+  inspect("haha", content="哈哈")!
+}
+
+test {
+  inspect("hahaha", content="哈哈")!
+}
+
+test {
+  inspect("哈哈", content="haha")!
+}
+
+test {
+  inspect("哈哈哈", content="haha")!
+}
+
+test {
+  let buf = Buffer::new()
+  buf.write_string("just\ntest")
+  buf.expect()!
+}
+
+test "hello" {
+  let buf = Buffer::new()
+  buf.write_string("just\ntest")
+  buf.expect(content="")!
+}
+
+fn actual() -> String {
+  "BinOp('+', BinOp('+', Num(1), Num(2)), Num(3))"
+}
+
+test {
+  inspect(actual(), content="BinOp('+', Num(1), Num(2))")!
+}
+
+test {
+  let xs = Array::from_fixed_array(["a", "b", "c"])
+  inspect(xs)!
+}
diff --git a/crates/moon/tests/test_cases/expect_test.in/lib/hello_wbtest.mbt b/crates/moon/tests/test_cases/expect_test.in/lib/hello_wbtest.mbt
new file mode 100644
index 00000000..f4cd057d
--- /dev/null
+++ b/crates/moon/tests/test_cases/expect_test.in/lib/hello_wbtest.mbt
@@ -0,0 +1,11 @@
+test "hello" {
+  let buf = Buffer::new()
+  buf.write_string("just\ntest")
+  buf.expect()!
+}
+
+test "not-buf" {
+  let notbuf = Buffer::new()
+  notbuf.write_string("haha")
+  notbuf.expect()!
+}
diff --git a/crates/moon/tests/test_cases/expect_test.in/lib/issue_188_wbtest.mbt b/crates/moon/tests/test_cases/expect_test.in/lib/issue_188_wbtest.mbt
new file mode 100644
index 00000000..5751aedf
--- /dev/null
+++ b/crates/moon/tests/test_cases/expect_test.in/lib/issue_188_wbtest.mbt
@@ -0,0 +1,21 @@
+fn actual_188() -> String {
+  #|State #0 (start)
+  #|Transitions:
+  #|  0.Assert(kind=BeginOfLine) -> State #1
+  #|State #1
+  #|
+
+}
+
+test "issue_188" {
+  inspect(
+    actual_188(),
+    content=
+      #|State #0
+      #|Transitions:
+      #|  0.Assert(kind=BeginOfLine) -> State #1
+      #|State #1
+      #|
+    ,
+  )!
+}
diff --git a/crates/moon/tests/test_cases/expect_test.in/lib/issue_209.mbt b/crates/moon/tests/test_cases/expect_test.in/lib/issue_209.mbt
new file mode 100644
index 00000000..cd25f121
--- /dev/null
+++ b/crates/moon/tests/test_cases/expect_test.in/lib/issue_209.mbt
@@ -0,0 +1,4 @@
+test "trailing comma" {
+  // 🤣
+  inspect(1234)!
+} // ,,,,,,,,,,,,,,,,,,,,
diff --git a/crates/moon/tests/test_cases/expect_test.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/expect_test.in/lib/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/expect_test.in/lib/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/expect_test.in/main/main.mbt b/crates/moon/tests/test_cases/expect_test.in/main/main.mbt
new file mode 100644
index 00000000..d25cb935
--- /dev/null
+++ b/crates/moon/tests/test_cases/expect_test.in/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println(@lib.hello())
+}
diff --git a/crates/moon/tests/test_cases/expect_test.in/main/moon.pkg.json b/crates/moon/tests/test_cases/expect_test.in/main/moon.pkg.json
new file mode 100644
index 00000000..48783525
--- /dev/null
+++ b/crates/moon/tests/test_cases/expect_test.in/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": [
+    "username/hello/lib"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/expect_test.in/moon.mod.json b/crates/moon/tests/test_cases/expect_test.in/moon.mod.json
new file mode 100644
index 00000000..80554ae2
--- /dev/null
+++ b/crates/moon/tests/test_cases/expect_test.in/moon.mod.json
@@ -0,0 +1,9 @@
+{
+  "name": "username/hello",
+  "version": "0.1.0",
+  "readme": "README.md",
+  "repository": "",
+  "license": "",
+  "keywords": [],
+  "description": ""
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/export_memory.in/.gitignore b/crates/moon/tests/test_cases/export_memory.in/.gitignore
new file mode 100644
index 00000000..b1283a74
--- /dev/null
+++ b/crates/moon/tests/test_cases/export_memory.in/.gitignore
@@ -0,0 +1,2 @@
+target/
+.mooncakes/
diff --git a/crates/moon/tests/test_cases/export_memory.in/README.md b/crates/moon/tests/test_cases/export_memory.in/README.md
new file mode 100644
index 00000000..ae00983f
--- /dev/null
+++ b/crates/moon/tests/test_cases/export_memory.in/README.md
@@ -0,0 +1 @@
+# username/hello
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/export_memory.in/lib/hello.mbt b/crates/moon/tests/test_cases/export_memory.in/lib/hello.mbt
new file mode 100644
index 00000000..9012592a
--- /dev/null
+++ b/crates/moon/tests/test_cases/export_memory.in/lib/hello.mbt
@@ -0,0 +1,3 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
diff --git a/crates/moon/tests/test_cases/export_memory.in/lib/hello_wbtest.mbt b/crates/moon/tests/test_cases/export_memory.in/lib/hello_wbtest.mbt
new file mode 100644
index 00000000..64f26429
--- /dev/null
+++ b/crates/moon/tests/test_cases/export_memory.in/lib/hello_wbtest.mbt
@@ -0,0 +1,5 @@
+test "hello" {
+  if hello() != "Hello, world!" {
+    return Err("hello() != \"Hello, world!\"")
+  }
+}
diff --git a/crates/moon/tests/test_cases/export_memory.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/export_memory.in/lib/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/export_memory.in/lib/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/export_memory.in/main/main.mbt b/crates/moon/tests/test_cases/export_memory.in/main/main.mbt
new file mode 100644
index 00000000..d25cb935
--- /dev/null
+++ b/crates/moon/tests/test_cases/export_memory.in/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println(@lib.hello())
+}
diff --git a/crates/moon/tests/test_cases/export_memory.in/main/moon.pkg.json b/crates/moon/tests/test_cases/export_memory.in/main/moon.pkg.json
new file mode 100644
index 00000000..b4b020ec
--- /dev/null
+++ b/crates/moon/tests/test_cases/export_memory.in/main/moon.pkg.json
@@ -0,0 +1,14 @@
+{
+  "is-main": true,
+  "import": [
+    "username/hello/lib"
+  ],
+  "link": {
+    "wasm": {
+      "export-memory-name": "awesome_memory"
+    },
+    "wasm-gc": {
+      "export-memory-name": "awesome_memory"
+    }
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/export_memory.in/moon.mod.json b/crates/moon/tests/test_cases/export_memory.in/moon.mod.json
new file mode 100644
index 00000000..80554ae2
--- /dev/null
+++ b/crates/moon/tests/test_cases/export_memory.in/moon.mod.json
@@ -0,0 +1,9 @@
+{
+  "name": "username/hello",
+  "version": "0.1.0",
+  "readme": "README.md",
+  "repository": "",
+  "license": "",
+  "keywords": [],
+  "description": ""
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/extra_flags.in/lib/hello.mbt b/crates/moon/tests/test_cases/extra_flags.in/lib/hello.mbt
new file mode 100644
index 00000000..a7ac2bee
--- /dev/null
+++ b/crates/moon/tests/test_cases/extra_flags.in/lib/hello.mbt
@@ -0,0 +1,4 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
+
diff --git a/crates/moon/tests/test_cases/extra_flags.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/extra_flags.in/lib/moon.pkg.json
new file mode 100644
index 00000000..0967ef42
--- /dev/null
+++ b/crates/moon/tests/test_cases/extra_flags.in/lib/moon.pkg.json
@@ -0,0 +1 @@
+{}
diff --git a/crates/moon/tests/test_cases/extra_flags.in/main/main.mbt b/crates/moon/tests/test_cases/extra_flags.in/main/main.mbt
new file mode 100644
index 00000000..d25cb935
--- /dev/null
+++ b/crates/moon/tests/test_cases/extra_flags.in/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println(@lib.hello())
+}
diff --git a/crates/moon/tests/test_cases/extra_flags.in/main/moon.pkg.json b/crates/moon/tests/test_cases/extra_flags.in/main/moon.pkg.json
new file mode 100644
index 00000000..0dccc0db
--- /dev/null
+++ b/crates/moon/tests/test_cases/extra_flags.in/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": {
+    "hello/lib": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/extra_flags.in/moon.mod.json b/crates/moon/tests/test_cases/extra_flags.in/moon.mod.json
new file mode 100644
index 00000000..f99a9ad9
--- /dev/null
+++ b/crates/moon/tests/test_cases/extra_flags.in/moon.mod.json
@@ -0,0 +1,10 @@
+{
+  "name": "hello",
+  "compile_flags": [
+    "-g",
+    "-no-builtin"
+  ],
+  "link_flags": [
+    "-no-builtin"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/fancy_import.in/import001/.gitignore b/crates/moon/tests/test_cases/fancy_import.in/import001/.gitignore
new file mode 100644
index 00000000..b1283a74
--- /dev/null
+++ b/crates/moon/tests/test_cases/fancy_import.in/import001/.gitignore
@@ -0,0 +1,2 @@
+target/
+.mooncakes/
diff --git a/crates/moon/tests/test_cases/fancy_import.in/import001/lib/hello.mbt b/crates/moon/tests/test_cases/fancy_import.in/import001/lib/hello.mbt
new file mode 100644
index 00000000..9012592a
--- /dev/null
+++ b/crates/moon/tests/test_cases/fancy_import.in/import001/lib/hello.mbt
@@ -0,0 +1,3 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
diff --git a/crates/moon/tests/test_cases/fancy_import.in/import001/lib/moon.pkg.json b/crates/moon/tests/test_cases/fancy_import.in/import001/lib/moon.pkg.json
new file mode 100644
index 00000000..9585a087
--- /dev/null
+++ b/crates/moon/tests/test_cases/fancy_import.in/import001/lib/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
diff --git a/crates/moon/tests/test_cases/fancy_import.in/import001/main/main.mbt b/crates/moon/tests/test_cases/fancy_import.in/import001/main/main.mbt
new file mode 100644
index 00000000..d25cb935
--- /dev/null
+++ b/crates/moon/tests/test_cases/fancy_import.in/import001/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println(@lib.hello())
+}
diff --git a/crates/moon/tests/test_cases/fancy_import.in/import001/main/moon.pkg.json b/crates/moon/tests/test_cases/fancy_import.in/import001/main/moon.pkg.json
new file mode 100644
index 00000000..f5eec55a
--- /dev/null
+++ b/crates/moon/tests/test_cases/fancy_import.in/import001/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": {
+    "moonbitlang/import001/lib": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/fancy_import.in/import001/moon.mod.json b/crates/moon/tests/test_cases/fancy_import.in/import001/moon.mod.json
new file mode 100644
index 00000000..b8cbdd3a
--- /dev/null
+++ b/crates/moon/tests/test_cases/fancy_import.in/import001/moon.mod.json
@@ -0,0 +1,4 @@
+{
+  "name": "moonbitlang/import001",
+  "version": "0.1.0"
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/fancy_import.in/import002/lib/hello.mbt b/crates/moon/tests/test_cases/fancy_import.in/import002/lib/hello.mbt
new file mode 100644
index 00000000..9012592a
--- /dev/null
+++ b/crates/moon/tests/test_cases/fancy_import.in/import002/lib/hello.mbt
@@ -0,0 +1,3 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
diff --git a/crates/moon/tests/test_cases/fancy_import.in/import002/lib/moon.pkg.json b/crates/moon/tests/test_cases/fancy_import.in/import002/lib/moon.pkg.json
new file mode 100644
index 00000000..b4cd6892
--- /dev/null
+++ b/crates/moon/tests/test_cases/fancy_import.in/import002/lib/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": []
+}
diff --git a/crates/moon/tests/test_cases/fancy_import.in/import002/main/main.mbt b/crates/moon/tests/test_cases/fancy_import.in/import002/main/main.mbt
new file mode 100644
index 00000000..d25cb935
--- /dev/null
+++ b/crates/moon/tests/test_cases/fancy_import.in/import002/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println(@lib.hello())
+}
diff --git a/crates/moon/tests/test_cases/fancy_import.in/import002/main/moon.pkg.json b/crates/moon/tests/test_cases/fancy_import.in/import002/main/moon.pkg.json
new file mode 100644
index 00000000..b6090256
--- /dev/null
+++ b/crates/moon/tests/test_cases/fancy_import.in/import002/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": [
+    "moonbitlang/import002/lib"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/fancy_import.in/import002/moon.mod.json b/crates/moon/tests/test_cases/fancy_import.in/import002/moon.mod.json
new file mode 100644
index 00000000..45a36093
--- /dev/null
+++ b/crates/moon/tests/test_cases/fancy_import.in/import002/moon.mod.json
@@ -0,0 +1,4 @@
+{
+  "name": "moonbitlang/import002",
+  "version": "0.1.0"
+}
diff --git a/crates/moon/tests/test_cases/fancy_import.in/import003/.gitignore b/crates/moon/tests/test_cases/fancy_import.in/import003/.gitignore
new file mode 100644
index 00000000..b1283a74
--- /dev/null
+++ b/crates/moon/tests/test_cases/fancy_import.in/import003/.gitignore
@@ -0,0 +1,2 @@
+target/
+.mooncakes/
diff --git a/crates/moon/tests/test_cases/fancy_import.in/import003/lib/hello.mbt b/crates/moon/tests/test_cases/fancy_import.in/import003/lib/hello.mbt
new file mode 100644
index 00000000..9012592a
--- /dev/null
+++ b/crates/moon/tests/test_cases/fancy_import.in/import003/lib/hello.mbt
@@ -0,0 +1,3 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
diff --git a/crates/moon/tests/test_cases/fancy_import.in/import003/lib/moon.pkg.json b/crates/moon/tests/test_cases/fancy_import.in/import003/lib/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/fancy_import.in/import003/lib/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/fancy_import.in/import003/lib2/hello.mbt b/crates/moon/tests/test_cases/fancy_import.in/import003/lib2/hello.mbt
new file mode 100644
index 00000000..86f782e4
--- /dev/null
+++ b/crates/moon/tests/test_cases/fancy_import.in/import003/lib2/hello.mbt
@@ -0,0 +1,3 @@
+pub fn hello2() -> String {
+  "Hello, world2!"
+}
diff --git a/crates/moon/tests/test_cases/fancy_import.in/import003/lib2/moon.pkg.json b/crates/moon/tests/test_cases/fancy_import.in/import003/lib2/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/fancy_import.in/import003/lib2/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/fancy_import.in/import003/main/main.mbt b/crates/moon/tests/test_cases/fancy_import.in/import003/main/main.mbt
new file mode 100644
index 00000000..d9d5027e
--- /dev/null
+++ b/crates/moon/tests/test_cases/fancy_import.in/import003/main/main.mbt
@@ -0,0 +1,4 @@
+fn main {
+  println(@lib.hello())
+  println(@haha.hello2())
+}
diff --git a/crates/moon/tests/test_cases/fancy_import.in/import003/main/moon.pkg.json b/crates/moon/tests/test_cases/fancy_import.in/import003/main/moon.pkg.json
new file mode 100644
index 00000000..0e7b484c
--- /dev/null
+++ b/crates/moon/tests/test_cases/fancy_import.in/import003/main/moon.pkg.json
@@ -0,0 +1,10 @@
+{
+  "is-main": true,
+  "import": [
+    "moonbitlang/import003/lib",
+    {
+      "path": "moonbitlang/import003/lib2",
+      "alias": "haha"
+    }
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/fancy_import.in/import003/moon.mod.json b/crates/moon/tests/test_cases/fancy_import.in/import003/moon.mod.json
new file mode 100644
index 00000000..5afd2db3
--- /dev/null
+++ b/crates/moon/tests/test_cases/fancy_import.in/import003/moon.mod.json
@@ -0,0 +1,4 @@
+{
+  "name": "moonbitlang/import003",
+  "version": "0.1.0"
+}
diff --git a/crates/moon/tests/test_cases/fancy_import.in/import004/.gitignore b/crates/moon/tests/test_cases/fancy_import.in/import004/.gitignore
new file mode 100644
index 00000000..b1283a74
--- /dev/null
+++ b/crates/moon/tests/test_cases/fancy_import.in/import004/.gitignore
@@ -0,0 +1,2 @@
+target/
+.mooncakes/
diff --git a/crates/moon/tests/test_cases/fancy_import.in/import004/lib/hello.mbt b/crates/moon/tests/test_cases/fancy_import.in/import004/lib/hello.mbt
new file mode 100644
index 00000000..3d4b5891
--- /dev/null
+++ b/crates/moon/tests/test_cases/fancy_import.in/import004/lib/hello.mbt
@@ -0,0 +1,3 @@
+pub fn f() -> String {
+    "f1"
+}
diff --git a/crates/moon/tests/test_cases/fancy_import.in/import004/lib/moon.pkg.json b/crates/moon/tests/test_cases/fancy_import.in/import004/lib/moon.pkg.json
new file mode 100644
index 00000000..9585a087
--- /dev/null
+++ b/crates/moon/tests/test_cases/fancy_import.in/import004/lib/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
diff --git a/crates/moon/tests/test_cases/fancy_import.in/import004/lib2/hello.mbt b/crates/moon/tests/test_cases/fancy_import.in/import004/lib2/hello.mbt
new file mode 100644
index 00000000..d361e29c
--- /dev/null
+++ b/crates/moon/tests/test_cases/fancy_import.in/import004/lib2/hello.mbt
@@ -0,0 +1,3 @@
+pub fn f() -> String {
+    "f2"
+}
diff --git a/crates/moon/tests/test_cases/fancy_import.in/import004/lib2/moon.pkg.json b/crates/moon/tests/test_cases/fancy_import.in/import004/lib2/moon.pkg.json
new file mode 100644
index 00000000..9585a087
--- /dev/null
+++ b/crates/moon/tests/test_cases/fancy_import.in/import004/lib2/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
diff --git a/crates/moon/tests/test_cases/fancy_import.in/import004/lib3/hello.mbt b/crates/moon/tests/test_cases/fancy_import.in/import004/lib3/hello.mbt
new file mode 100644
index 00000000..533926a5
--- /dev/null
+++ b/crates/moon/tests/test_cases/fancy_import.in/import004/lib3/hello.mbt
@@ -0,0 +1,3 @@
+pub fn f() -> String {
+    "f3"
+}
diff --git a/crates/moon/tests/test_cases/fancy_import.in/import004/lib3/moon.pkg.json b/crates/moon/tests/test_cases/fancy_import.in/import004/lib3/moon.pkg.json
new file mode 100644
index 00000000..9585a087
--- /dev/null
+++ b/crates/moon/tests/test_cases/fancy_import.in/import004/lib3/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
diff --git a/crates/moon/tests/test_cases/fancy_import.in/import004/lib4/hello.mbt b/crates/moon/tests/test_cases/fancy_import.in/import004/lib4/hello.mbt
new file mode 100644
index 00000000..c0f00acd
--- /dev/null
+++ b/crates/moon/tests/test_cases/fancy_import.in/import004/lib4/hello.mbt
@@ -0,0 +1,3 @@
+pub fn f() -> String {
+    "f4"
+}
diff --git a/crates/moon/tests/test_cases/fancy_import.in/import004/lib4/moon.pkg.json b/crates/moon/tests/test_cases/fancy_import.in/import004/lib4/moon.pkg.json
new file mode 100644
index 00000000..9585a087
--- /dev/null
+++ b/crates/moon/tests/test_cases/fancy_import.in/import004/lib4/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
diff --git a/crates/moon/tests/test_cases/fancy_import.in/import004/main/main.mbt b/crates/moon/tests/test_cases/fancy_import.in/import004/main/main.mbt
new file mode 100644
index 00000000..18d5bc7a
--- /dev/null
+++ b/crates/moon/tests/test_cases/fancy_import.in/import004/main/main.mbt
@@ -0,0 +1,6 @@
+fn main {
+  println(@lib.f())
+  println(@lib2.f())
+  println(@lib3.f())
+  println(@lib4.f())
+}
diff --git a/crates/moon/tests/test_cases/fancy_import.in/import004/main/moon.pkg.json b/crates/moon/tests/test_cases/fancy_import.in/import004/main/moon.pkg.json
new file mode 100644
index 00000000..c6f47291
--- /dev/null
+++ b/crates/moon/tests/test_cases/fancy_import.in/import004/main/moon.pkg.json
@@ -0,0 +1,18 @@
+{
+  "is-main": true,
+  "import": [
+    {
+      "path": "moonbitlang/import004/lib",
+      "alias": "lib"
+    },
+    "moonbitlang/import004/lib2",
+    {
+      "path": "moonbitlang/import004/lib3",
+      "alias": "lib3"
+    },
+    {
+      "path": "moonbitlang/import004/lib4",
+      "alias": ""
+    }
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/fancy_import.in/import004/moon.mod.json b/crates/moon/tests/test_cases/fancy_import.in/import004/moon.mod.json
new file mode 100644
index 00000000..dd8ee994
--- /dev/null
+++ b/crates/moon/tests/test_cases/fancy_import.in/import004/moon.mod.json
@@ -0,0 +1,4 @@
+{
+  "name": "moonbitlang/import004",
+  "version": "0.1.0"
+}
diff --git a/crates/moon/tests/test_cases/hello.in/main/main.mbt b/crates/moon/tests/test_cases/hello.in/main/main.mbt
new file mode 100644
index 00000000..e23f6650
--- /dev/null
+++ b/crates/moon/tests/test_cases/hello.in/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println("Hello, world!")
+}
diff --git a/crates/moon/tests/test_cases/hello.in/main/moon.pkg.json b/crates/moon/tests/test_cases/hello.in/main/moon.pkg.json
new file mode 100644
index 00000000..d48c4d24
--- /dev/null
+++ b/crates/moon/tests/test_cases/hello.in/main/moon.pkg.json
@@ -0,0 +1,4 @@
+{
+  "is-main": true,
+  "import": {}
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/hello.in/moon.mod.json b/crates/moon/tests/test_cases/hello.in/moon.mod.json
new file mode 100644
index 00000000..61113747
--- /dev/null
+++ b/crates/moon/tests/test_cases/hello.in/moon.mod.json
@@ -0,0 +1,3 @@
+{
+  "name": "hello"
+}
diff --git a/crates/moon/tests/test_cases/import_memory.in/.gitignore b/crates/moon/tests/test_cases/import_memory.in/.gitignore
new file mode 100644
index 00000000..b1283a74
--- /dev/null
+++ b/crates/moon/tests/test_cases/import_memory.in/.gitignore
@@ -0,0 +1,2 @@
+target/
+.mooncakes/
diff --git a/crates/moon/tests/test_cases/import_memory.in/README.md b/crates/moon/tests/test_cases/import_memory.in/README.md
new file mode 100644
index 00000000..ae00983f
--- /dev/null
+++ b/crates/moon/tests/test_cases/import_memory.in/README.md
@@ -0,0 +1 @@
+# username/hello
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/import_memory.in/lib/hello.mbt b/crates/moon/tests/test_cases/import_memory.in/lib/hello.mbt
new file mode 100644
index 00000000..9012592a
--- /dev/null
+++ b/crates/moon/tests/test_cases/import_memory.in/lib/hello.mbt
@@ -0,0 +1,3 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
diff --git a/crates/moon/tests/test_cases/import_memory.in/lib/hello_test.mbt b/crates/moon/tests/test_cases/import_memory.in/lib/hello_test.mbt
new file mode 100644
index 00000000..85944a2c
--- /dev/null
+++ b/crates/moon/tests/test_cases/import_memory.in/lib/hello_test.mbt
@@ -0,0 +1,5 @@
+test "hello" {
+  if hello() != "Hello, world!" {
+    raise "hello() != \"Hello, world!\""
+  }
+}
diff --git a/crates/moon/tests/test_cases/import_memory.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/import_memory.in/lib/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/import_memory.in/lib/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/import_memory.in/main/main.mbt b/crates/moon/tests/test_cases/import_memory.in/main/main.mbt
new file mode 100644
index 00000000..d25cb935
--- /dev/null
+++ b/crates/moon/tests/test_cases/import_memory.in/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println(@lib.hello())
+}
diff --git a/crates/moon/tests/test_cases/import_memory.in/main/moon.pkg.json b/crates/moon/tests/test_cases/import_memory.in/main/moon.pkg.json
new file mode 100644
index 00000000..ad1ab926
--- /dev/null
+++ b/crates/moon/tests/test_cases/import_memory.in/main/moon.pkg.json
@@ -0,0 +1,21 @@
+{
+  "is-main": true,
+  "import": [
+    "username/hello/lib"
+  ],
+  "link": {
+    "wasm": {
+      "heap-start-address": 65536,
+      "import-memory": {
+        "module": "xxx",
+        "name": "yyy"
+      }
+    },
+    "wasm-gc": {
+        "import-memory": {
+          "module": "xxx",
+          "name": "yyy"
+        }
+      }
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/import_memory.in/moon.mod.json b/crates/moon/tests/test_cases/import_memory.in/moon.mod.json
new file mode 100644
index 00000000..80554ae2
--- /dev/null
+++ b/crates/moon/tests/test_cases/import_memory.in/moon.mod.json
@@ -0,0 +1,9 @@
+{
+  "name": "username/hello",
+  "version": "0.1.0",
+  "readme": "README.md",
+  "repository": "",
+  "license": "",
+  "keywords": [],
+  "description": ""
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/internal_package.in/.gitignore b/crates/moon/tests/test_cases/internal_package.in/.gitignore
new file mode 100644
index 00000000..b1283a74
--- /dev/null
+++ b/crates/moon/tests/test_cases/internal_package.in/.gitignore
@@ -0,0 +1,2 @@
+target/
+.mooncakes/
diff --git a/crates/moon/tests/test_cases/internal_package.in/README.md b/crates/moon/tests/test_cases/internal_package.in/README.md
new file mode 100644
index 00000000..ae00983f
--- /dev/null
+++ b/crates/moon/tests/test_cases/internal_package.in/README.md
@@ -0,0 +1 @@
+# username/hello
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/internal_package.in/lib/a/lib.mbt b/crates/moon/tests/test_cases/internal_package.in/lib/a/lib.mbt
new file mode 100644
index 00000000..d44873fc
--- /dev/null
+++ b/crates/moon/tests/test_cases/internal_package.in/lib/a/lib.mbt
@@ -0,0 +1,3 @@
+pub fn g() -> String {
+  ""
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/internal_package.in/lib/a/moon.pkg.json b/crates/moon/tests/test_cases/internal_package.in/lib/a/moon.pkg.json
new file mode 100644
index 00000000..7c91baba
--- /dev/null
+++ b/crates/moon/tests/test_cases/internal_package.in/lib/a/moon.pkg.json
@@ -0,0 +1,5 @@
+{
+    "import": [
+        "username/hello/lib/internal"
+    ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/internal_package.in/lib/hello.mbt b/crates/moon/tests/test_cases/internal_package.in/lib/hello.mbt
new file mode 100644
index 00000000..9012592a
--- /dev/null
+++ b/crates/moon/tests/test_cases/internal_package.in/lib/hello.mbt
@@ -0,0 +1,3 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
diff --git a/crates/moon/tests/test_cases/internal_package.in/lib/hello_wbtest.mbt b/crates/moon/tests/test_cases/internal_package.in/lib/hello_wbtest.mbt
new file mode 100644
index 00000000..64f26429
--- /dev/null
+++ b/crates/moon/tests/test_cases/internal_package.in/lib/hello_wbtest.mbt
@@ -0,0 +1,5 @@
+test "hello" {
+  if hello() != "Hello, world!" {
+    return Err("hello() != \"Hello, world!\"")
+  }
+}
diff --git a/crates/moon/tests/test_cases/internal_package.in/lib/internal/b/lib.mbt b/crates/moon/tests/test_cases/internal_package.in/lib/internal/b/lib.mbt
new file mode 100644
index 00000000..d44873fc
--- /dev/null
+++ b/crates/moon/tests/test_cases/internal_package.in/lib/internal/b/lib.mbt
@@ -0,0 +1,3 @@
+pub fn g() -> String {
+  ""
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/internal_package.in/lib/internal/b/moon.pkg.json b/crates/moon/tests/test_cases/internal_package.in/lib/internal/b/moon.pkg.json
new file mode 100644
index 00000000..7c91baba
--- /dev/null
+++ b/crates/moon/tests/test_cases/internal_package.in/lib/internal/b/moon.pkg.json
@@ -0,0 +1,5 @@
+{
+    "import": [
+        "username/hello/lib/internal"
+    ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/internal_package.in/lib/internal/lib.mbt b/crates/moon/tests/test_cases/internal_package.in/lib/internal/lib.mbt
new file mode 100644
index 00000000..d44873fc
--- /dev/null
+++ b/crates/moon/tests/test_cases/internal_package.in/lib/internal/lib.mbt
@@ -0,0 +1,3 @@
+pub fn g() -> String {
+  ""
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/internal_package.in/lib/internal/moon.pkg.json b/crates/moon/tests/test_cases/internal_package.in/lib/internal/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/internal_package.in/lib/internal/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/internal_package.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/internal_package.in/lib/moon.pkg.json
new file mode 100644
index 00000000..7c91baba
--- /dev/null
+++ b/crates/moon/tests/test_cases/internal_package.in/lib/moon.pkg.json
@@ -0,0 +1,5 @@
+{
+    "import": [
+        "username/hello/lib/internal"
+    ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/internal_package.in/lib2/lib.mbt b/crates/moon/tests/test_cases/internal_package.in/lib2/lib.mbt
new file mode 100644
index 00000000..e69de29b
diff --git a/crates/moon/tests/test_cases/internal_package.in/lib2/moon.pkg.json b/crates/moon/tests/test_cases/internal_package.in/lib2/moon.pkg.json
new file mode 100644
index 00000000..2af65622
--- /dev/null
+++ b/crates/moon/tests/test_cases/internal_package.in/lib2/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+    "import": [
+        "username/hello/lib/internal",
+        "username/hello/lib/internal/b"
+    ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/internal_package.in/main/main.mbt b/crates/moon/tests/test_cases/internal_package.in/main/main.mbt
new file mode 100644
index 00000000..d25cb935
--- /dev/null
+++ b/crates/moon/tests/test_cases/internal_package.in/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println(@lib.hello())
+}
diff --git a/crates/moon/tests/test_cases/internal_package.in/main/moon.pkg.json b/crates/moon/tests/test_cases/internal_package.in/main/moon.pkg.json
new file mode 100644
index 00000000..36b1d96a
--- /dev/null
+++ b/crates/moon/tests/test_cases/internal_package.in/main/moon.pkg.json
@@ -0,0 +1,7 @@
+{
+  "is-main": true,
+  "import": [
+    "username/hello/lib",
+    "username/hello/lib/internal"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/internal_package.in/moon.mod.json b/crates/moon/tests/test_cases/internal_package.in/moon.mod.json
new file mode 100644
index 00000000..07224d12
--- /dev/null
+++ b/crates/moon/tests/test_cases/internal_package.in/moon.mod.json
@@ -0,0 +1,10 @@
+{
+  "name": "username/hello",
+  "version": "0.1.0",
+  "deps": {},
+  "readme": "README.md",
+  "repository": "",
+  "license": "",
+  "keywords": [],
+  "description": ""
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/js_format.in/.gitignore b/crates/moon/tests/test_cases/js_format.in/.gitignore
new file mode 100644
index 00000000..b1283a74
--- /dev/null
+++ b/crates/moon/tests/test_cases/js_format.in/.gitignore
@@ -0,0 +1,2 @@
+target/
+.mooncakes/
diff --git a/crates/moon/tests/test_cases/js_format.in/README.md b/crates/moon/tests/test_cases/js_format.in/README.md
new file mode 100644
index 00000000..ae00983f
--- /dev/null
+++ b/crates/moon/tests/test_cases/js_format.in/README.md
@@ -0,0 +1 @@
+# username/hello
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/js_format.in/lib0/hello.mbt b/crates/moon/tests/test_cases/js_format.in/lib0/hello.mbt
new file mode 100644
index 00000000..9012592a
--- /dev/null
+++ b/crates/moon/tests/test_cases/js_format.in/lib0/hello.mbt
@@ -0,0 +1,3 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
diff --git a/crates/moon/tests/test_cases/js_format.in/lib0/hello_wbtest.mbt b/crates/moon/tests/test_cases/js_format.in/lib0/hello_wbtest.mbt
new file mode 100644
index 00000000..64f26429
--- /dev/null
+++ b/crates/moon/tests/test_cases/js_format.in/lib0/hello_wbtest.mbt
@@ -0,0 +1,5 @@
+test "hello" {
+  if hello() != "Hello, world!" {
+    return Err("hello() != \"Hello, world!\"")
+  }
+}
diff --git a/crates/moon/tests/test_cases/js_format.in/lib0/moon.pkg.json b/crates/moon/tests/test_cases/js_format.in/lib0/moon.pkg.json
new file mode 100644
index 00000000..d5988533
--- /dev/null
+++ b/crates/moon/tests/test_cases/js_format.in/lib0/moon.pkg.json
@@ -0,0 +1,9 @@
+{
+  "link": {
+    "js": {
+      "exports": [
+        "hello"
+      ]
+    }
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/js_format.in/lib1/hello.mbt b/crates/moon/tests/test_cases/js_format.in/lib1/hello.mbt
new file mode 100644
index 00000000..9012592a
--- /dev/null
+++ b/crates/moon/tests/test_cases/js_format.in/lib1/hello.mbt
@@ -0,0 +1,3 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
diff --git a/crates/moon/tests/test_cases/js_format.in/lib1/hello_wbtest.mbt b/crates/moon/tests/test_cases/js_format.in/lib1/hello_wbtest.mbt
new file mode 100644
index 00000000..64f26429
--- /dev/null
+++ b/crates/moon/tests/test_cases/js_format.in/lib1/hello_wbtest.mbt
@@ -0,0 +1,5 @@
+test "hello" {
+  if hello() != "Hello, world!" {
+    return Err("hello() != \"Hello, world!\"")
+  }
+}
diff --git a/crates/moon/tests/test_cases/js_format.in/lib1/moon.pkg.json b/crates/moon/tests/test_cases/js_format.in/lib1/moon.pkg.json
new file mode 100644
index 00000000..29ddeb9c
--- /dev/null
+++ b/crates/moon/tests/test_cases/js_format.in/lib1/moon.pkg.json
@@ -0,0 +1,10 @@
+{
+  "link": {
+    "js": {
+      "exports": [
+        "hello"
+      ],
+      "format": "esm"
+    }
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/js_format.in/lib2/hello.mbt b/crates/moon/tests/test_cases/js_format.in/lib2/hello.mbt
new file mode 100644
index 00000000..9012592a
--- /dev/null
+++ b/crates/moon/tests/test_cases/js_format.in/lib2/hello.mbt
@@ -0,0 +1,3 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
diff --git a/crates/moon/tests/test_cases/js_format.in/lib2/hello_wbtest.mbt b/crates/moon/tests/test_cases/js_format.in/lib2/hello_wbtest.mbt
new file mode 100644
index 00000000..64f26429
--- /dev/null
+++ b/crates/moon/tests/test_cases/js_format.in/lib2/hello_wbtest.mbt
@@ -0,0 +1,5 @@
+test "hello" {
+  if hello() != "Hello, world!" {
+    return Err("hello() != \"Hello, world!\"")
+  }
+}
diff --git a/crates/moon/tests/test_cases/js_format.in/lib2/moon.pkg.json b/crates/moon/tests/test_cases/js_format.in/lib2/moon.pkg.json
new file mode 100644
index 00000000..1dd40336
--- /dev/null
+++ b/crates/moon/tests/test_cases/js_format.in/lib2/moon.pkg.json
@@ -0,0 +1,10 @@
+{
+  "link": {
+    "js": {
+      "exports": [
+        "hello"
+      ],
+      "format": "cjs"
+    }
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/js_format.in/lib3/hello.mbt b/crates/moon/tests/test_cases/js_format.in/lib3/hello.mbt
new file mode 100644
index 00000000..9012592a
--- /dev/null
+++ b/crates/moon/tests/test_cases/js_format.in/lib3/hello.mbt
@@ -0,0 +1,3 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
diff --git a/crates/moon/tests/test_cases/js_format.in/lib3/hello_wbtest.mbt b/crates/moon/tests/test_cases/js_format.in/lib3/hello_wbtest.mbt
new file mode 100644
index 00000000..64f26429
--- /dev/null
+++ b/crates/moon/tests/test_cases/js_format.in/lib3/hello_wbtest.mbt
@@ -0,0 +1,5 @@
+test "hello" {
+  if hello() != "Hello, world!" {
+    return Err("hello() != \"Hello, world!\"")
+  }
+}
diff --git a/crates/moon/tests/test_cases/js_format.in/lib3/moon.pkg.json b/crates/moon/tests/test_cases/js_format.in/lib3/moon.pkg.json
new file mode 100644
index 00000000..316fcc99
--- /dev/null
+++ b/crates/moon/tests/test_cases/js_format.in/lib3/moon.pkg.json
@@ -0,0 +1,10 @@
+{
+  "link": {
+    "js": {
+      "exports": [
+        "hello"
+      ],
+      "format": "iife"
+    }
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/js_format.in/moon.mod.json b/crates/moon/tests/test_cases/js_format.in/moon.mod.json
new file mode 100644
index 00000000..80554ae2
--- /dev/null
+++ b/crates/moon/tests/test_cases/js_format.in/moon.mod.json
@@ -0,0 +1,9 @@
+{
+  "name": "username/hello",
+  "version": "0.1.0",
+  "readme": "README.md",
+  "repository": "",
+  "license": "",
+  "keywords": [],
+  "description": ""
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/mbti.in/.gitignore b/crates/moon/tests/test_cases/mbti.in/.gitignore
new file mode 100644
index 00000000..b1283a74
--- /dev/null
+++ b/crates/moon/tests/test_cases/mbti.in/.gitignore
@@ -0,0 +1,2 @@
+target/
+.mooncakes/
diff --git a/crates/moon/tests/test_cases/mbti.in/README.md b/crates/moon/tests/test_cases/mbti.in/README.md
new file mode 100644
index 00000000..ae00983f
--- /dev/null
+++ b/crates/moon/tests/test_cases/mbti.in/README.md
@@ -0,0 +1 @@
+# username/hello
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/mbti.in/lib/hello.mbt b/crates/moon/tests/test_cases/mbti.in/lib/hello.mbt
new file mode 100644
index 00000000..9012592a
--- /dev/null
+++ b/crates/moon/tests/test_cases/mbti.in/lib/hello.mbt
@@ -0,0 +1,3 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
diff --git a/crates/moon/tests/test_cases/mbti.in/lib/hello_wbtest.mbt b/crates/moon/tests/test_cases/mbti.in/lib/hello_wbtest.mbt
new file mode 100644
index 00000000..85944a2c
--- /dev/null
+++ b/crates/moon/tests/test_cases/mbti.in/lib/hello_wbtest.mbt
@@ -0,0 +1,5 @@
+test "hello" {
+  if hello() != "Hello, world!" {
+    raise "hello() != \"Hello, world!\""
+  }
+}
diff --git a/crates/moon/tests/test_cases/mbti.in/lib/lib.mbti b/crates/moon/tests/test_cases/mbti.in/lib/lib.mbti
new file mode 100644
index 00000000..64108267
--- /dev/null
+++ b/crates/moon/tests/test_cases/mbti.in/lib/lib.mbti
@@ -0,0 +1,11 @@
+package username/hello/lib
+
+// Values
+fn hello() -> String
+
+// Types and methods
+
+// Traits
+
+// Extension Methods
+
diff --git a/crates/moon/tests/test_cases/mbti.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/mbti.in/lib/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/mbti.in/lib/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/mbti.in/main/main.mbt b/crates/moon/tests/test_cases/mbti.in/main/main.mbt
new file mode 100644
index 00000000..d25cb935
--- /dev/null
+++ b/crates/moon/tests/test_cases/mbti.in/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println(@lib.hello())
+}
diff --git a/crates/moon/tests/test_cases/mbti.in/main/main.mbti b/crates/moon/tests/test_cases/mbti.in/main/main.mbti
new file mode 100644
index 00000000..5df9ccd7
--- /dev/null
+++ b/crates/moon/tests/test_cases/mbti.in/main/main.mbti
@@ -0,0 +1,10 @@
+package username/hello/main
+
+// Values
+
+// Types and methods
+
+// Traits
+
+// Extension Methods
+
diff --git a/crates/moon/tests/test_cases/mbti.in/main/moon.pkg.json b/crates/moon/tests/test_cases/mbti.in/main/moon.pkg.json
new file mode 100644
index 00000000..48783525
--- /dev/null
+++ b/crates/moon/tests/test_cases/mbti.in/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": [
+    "username/hello/lib"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/mbti.in/moon.mod.json b/crates/moon/tests/test_cases/mbti.in/moon.mod.json
new file mode 100644
index 00000000..80554ae2
--- /dev/null
+++ b/crates/moon/tests/test_cases/mbti.in/moon.mod.json
@@ -0,0 +1,9 @@
+{
+  "name": "username/hello",
+  "version": "0.1.0",
+  "readme": "README.md",
+  "repository": "",
+  "license": "",
+  "keywords": [],
+  "description": ""
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/mod.rs b/crates/moon/tests/test_cases/mod.rs
new file mode 100644
index 00000000..b2cff869
--- /dev/null
+++ b/crates/moon/tests/test_cases/mod.rs
@@ -0,0 +1,4969 @@
+use std::io::Write;
+
+use super::*;
+use expect_test::expect;
+use moonutil::common::{
+    get_cargo_pkg_version, CargoPathExt, TargetBackend, DEP_PATH, MOON_MOD_JSON,
+};
+use walkdir::WalkDir;
+
+#[test]
+fn test_design() {
+    let dir = TestDir::new("design.in");
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["check"])
+        .assert()
+        .success();
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["clean"])
+        .assert()
+        .success();
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["build"])
+        .assert()
+        .success();
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["clean"])
+        .assert()
+        .success();
+    check(
+        &get_stdout_with_args(&dir, ["run", "main1"]),
+        expect![[r#"
+            new_list
+            new_queue
+            new_list
+            new_stack
+            new_vector
+            main1
+        "#]],
+    );
+    check(
+        &get_stdout_with_args(&dir, ["run", "main2"]),
+        expect![[r#"
+            new_list
+            new_queue
+            main2
+        "#]],
+    );
+}
+
+#[test]
+fn test_diamond_pkg_001() {
+    let dir = TestDir::new("diamond-pkg-001.in");
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["check"])
+        .assert()
+        .success();
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["clean"])
+        .assert()
+        .success();
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["build"])
+        .assert()
+        .success();
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["clean"])
+        .assert()
+        .success();
+    check(
+        &get_stdout_with_args(&dir, ["run", "main"]),
+        expect![[r#"
+            A
+            B
+            A
+            C
+            main
+        "#]],
+    );
+}
+
+#[test]
+fn test_diamond_pkg_002() {
+    let dir = TestDir::new("diamond-pkg-002.in");
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["check"])
+        .assert()
+        .success();
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["clean"])
+        .assert()
+        .success();
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["build"])
+        .assert()
+        .success();
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["clean"])
+        .assert()
+        .success();
+    check(
+        &get_stdout_with_args(&dir, ["run", "main"]),
+        expect![[r#"
+            A0
+            A1
+            A2
+            A
+            B0
+            B1
+            B2
+            B
+            A0
+            A1
+            A2
+            A
+            C0
+            C1
+            C2
+            C
+            main
+        "#]],
+    );
+}
+
+#[test]
+fn test_diamond_pkg_003() {
+    let dir = TestDir::new("diamond-pkg-003.in");
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["check"])
+        .assert()
+        .success();
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["clean"])
+        .assert()
+        .success();
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["build"])
+        .assert()
+        .success();
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["clean"])
+        .assert()
+        .success();
+    check(
+        &get_stdout_with_args(&dir, ["run", "main"]),
+        expect![[r#"
+            A0
+            A1
+            A2
+            A
+            B0
+            B1
+            B2
+            B
+            A0
+            A1
+            A2
+            A
+            C0
+            C1
+            C2
+            C
+            main
+        "#]],
+    );
+}
+
+#[test]
+fn test_extra_flags() {
+    let dir = TestDir::new("extra_flags.in");
+    check(
+        &get_stdout_with_args(&dir, ["build", "--dry-run", "--nostd"]),
+        expect![[r#"
+            moonc build-package ./lib/hello.mbt -o ./target/wasm-gc/release/build/lib/lib.core -pkg hello/lib -pkg-sources hello/lib:./lib -target wasm-gc -g -no-builtin
+            moonc build-package ./main/main.mbt -o ./target/wasm-gc/release/build/main/main.core -pkg hello/main -is-main -i ./target/wasm-gc/release/build/lib/lib.mi:lib -pkg-sources hello/main:./main -target wasm-gc -g -no-builtin
+            moonc link-core ./target/wasm-gc/release/build/lib/lib.core ./target/wasm-gc/release/build/main/main.core -main hello/main -o ./target/wasm-gc/release/build/main/main.wasm -pkg-sources hello/lib:./lib -pkg-sources hello/main:./main -target wasm-gc -no-builtin
+        "#]],
+    );
+    check(
+        &get_stdout_with_args(&dir, ["build", "--dry-run", "--debug", "--nostd"]),
+        expect![[r#"
+            moonc build-package ./lib/hello.mbt -o ./target/wasm-gc/debug/build/lib/lib.core -pkg hello/lib -pkg-sources hello/lib:./lib -target wasm-gc -g -source-map -g -no-builtin
+            moonc build-package ./main/main.mbt -o ./target/wasm-gc/debug/build/main/main.core -pkg hello/main -is-main -i ./target/wasm-gc/debug/build/lib/lib.mi:lib -pkg-sources hello/main:./main -target wasm-gc -g -source-map -g -no-builtin
+            moonc link-core ./target/wasm-gc/debug/build/lib/lib.core ./target/wasm-gc/debug/build/main/main.core -main hello/main -o ./target/wasm-gc/debug/build/main/main.wasm -pkg-sources hello/lib:./lib -pkg-sources hello/main:./main -target wasm-gc -g -source-map -no-builtin
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args(&dir, ["run", "main", "--dry-run", "--nostd"]),
+        expect![[r#"
+            moonc build-package ./lib/hello.mbt -o ./target/wasm-gc/release/build/lib/lib.core -pkg hello/lib -pkg-sources hello/lib:./lib -target wasm-gc -g -no-builtin
+            moonc build-package ./main/main.mbt -o ./target/wasm-gc/release/build/main/main.core -pkg hello/main -is-main -i ./target/wasm-gc/release/build/lib/lib.mi:lib -pkg-sources hello/main:./main -target wasm-gc -g -no-builtin
+            moonc link-core ./target/wasm-gc/release/build/lib/lib.core ./target/wasm-gc/release/build/main/main.core -main hello/main -o ./target/wasm-gc/release/build/main/main.wasm -pkg-sources hello/lib:./lib -pkg-sources hello/main:./main -target wasm-gc -no-builtin
+            moonrun ./target/wasm-gc/release/build/main/main.wasm
+        "#]],
+    );
+    check(
+        &get_stdout_with_args(&dir, ["run", "main", "--dry-run", "--debug", "--nostd"]),
+        expect![[r#"
+            moonc build-package ./lib/hello.mbt -o ./target/wasm-gc/debug/build/lib/lib.core -pkg hello/lib -pkg-sources hello/lib:./lib -target wasm-gc -g -source-map -g -no-builtin
+            moonc build-package ./main/main.mbt -o ./target/wasm-gc/debug/build/main/main.core -pkg hello/main -is-main -i ./target/wasm-gc/debug/build/lib/lib.mi:lib -pkg-sources hello/main:./main -target wasm-gc -g -source-map -g -no-builtin
+            moonc link-core ./target/wasm-gc/debug/build/lib/lib.core ./target/wasm-gc/debug/build/main/main.core -main hello/main -o ./target/wasm-gc/debug/build/main/main.wasm -pkg-sources hello/lib:./lib -pkg-sources hello/main:./main -target wasm-gc -g -source-map -no-builtin
+            moonrun ./target/wasm-gc/debug/build/main/main.wasm
+        "#]],
+    );
+}
+
+#[test]
+fn test_fancy_import() {
+    let dir = TestDir::new("fancy_import.in/import001");
+    check(
+        &get_stdout_with_args(&dir, ["run", "main"]),
+        expect![[r#"
+            Hello, world!
+        "#]],
+    );
+
+    let dir = TestDir::new("fancy_import.in/import002");
+    check(
+        &get_stdout_with_args(&dir, ["run", "main"]),
+        expect![[r#"
+            Hello, world!
+        "#]],
+    );
+
+    let dir = TestDir::new("fancy_import.in/import003");
+    check(
+        &get_stdout_with_args(&dir, ["run", "main"]),
+        expect![[r#"
+            Hello, world!
+            Hello, world2!
+        "#]],
+    );
+
+    let dir = TestDir::new("fancy_import.in/import004");
+    check(
+        &get_stdout_with_args(&dir, ["run", "main"]),
+        expect![[r#"
+            f1
+            f2
+            f3
+            f4
+        "#]],
+    );
+}
+
+#[test]
+fn test_hello() {
+    let dir = TestDir::new("hello.in");
+    check(
+        &get_stdout_with_args(&dir, ["run", "main"]),
+        expect![[r#"
+            Hello, world!
+        "#]],
+    );
+}
+
+#[test]
+fn test_moon_commands() {
+    let dir = TestDir::new("moon_commands.in");
+    check(
+        &get_stdout_with_args(&dir, ["build", "--dry-run", "--nostd", "--sort-input"]),
+        expect![[r#"
+            moonc build-package ./lib/list/lib.mbt -o ./target/wasm-gc/release/build/lib/list/list.core -pkg design/lib/list -pkg-sources design/lib/list:./lib/list -target wasm-gc
+            moonc build-package ./lib/queue/lib.mbt -o ./target/wasm-gc/release/build/lib/queue/queue.core -pkg design/lib/queue -i ./target/wasm-gc/release/build/lib/list/list.mi:list -pkg-sources design/lib/queue:./lib/queue -target wasm-gc
+            moonc build-package ./main2/main.mbt -o ./target/wasm-gc/release/build/main2/main2.core -pkg design/main2 -is-main -i ./target/wasm-gc/release/build/lib/queue/queue.mi:queue -pkg-sources design/main2:./main2 -target wasm-gc
+            moonc link-core ./target/wasm-gc/release/build/lib/list/list.core ./target/wasm-gc/release/build/lib/queue/queue.core ./target/wasm-gc/release/build/main2/main2.core -main design/main2 -o ./target/wasm-gc/release/build/main2/main2.wasm -pkg-sources design/lib/list:./lib/list -pkg-sources design/lib/queue:./lib/queue -pkg-sources design/main2:./main2 -target wasm-gc
+            moonc build-package ./main1/main.mbt -o ./target/wasm-gc/release/build/main1/main1.core -pkg design/main1 -is-main -i ./target/wasm-gc/release/build/lib/queue/queue.mi:queue -pkg-sources design/main1:./main1 -target wasm-gc
+            moonc link-core ./target/wasm-gc/release/build/lib/list/list.core ./target/wasm-gc/release/build/lib/queue/queue.core ./target/wasm-gc/release/build/main1/main1.core -main design/main1 -o ./target/wasm-gc/release/build/main1/main1.wasm -pkg-sources design/lib/list:./lib/list -pkg-sources design/lib/queue:./lib/queue -pkg-sources design/main1:./main1 -target wasm-gc
+        "#]],
+    );
+}
+
+#[test]
+fn test_moon_run_main() {
+    let dir = TestDir::new("moon_new.in");
+    check(
+        &get_stdout_with_args(&dir, ["run", "main"]),
+        expect![[r#"
+            Hello, world!
+        "#]],
+    );
+}
+
+#[test]
+#[cfg(unix)]
+fn test_moon_new() {
+    let dir = TestDir::new_empty();
+    get_stdout_with_args(
+        &dir,
+        [
+            "new",
+            "--path",
+            "hello",
+            "--user",
+            "moonbitlang",
+            "--name",
+            "hello",
+        ],
+    );
+    check(
+        &get_stdout_with_args(
+            &dir,
+            [
+                "run",
+                "--source-dir",
+                "./hello",
+                "--target-dir",
+                "./hello/target",
+                "main",
+            ],
+        ),
+        expect![[r#"
+            Hello, world!
+        "#]],
+    );
+}
+
+#[test]
+fn test_moon_help() {
+    let dir = TestDir::new_empty();
+    check(
+        &get_stdout_with_args(&dir, ["help"]).replace("moon.exe", "moon"),
+        expect![[r#"
+            The build system and package manager for MoonBit.
+
+            Usage: moon [OPTIONS] <COMMAND>
+
+            Commands:
+              new                    Create a new moonbit package
+              build                  Build the current package
+              check                  Check the current package, but don't build object files
+              run                    Run WebAssembly module
+              test                   Test the current package
+              clean                  Clean the target directory
+              fmt                    Format moonbit source code
+              doc                    Generate documentation
+              info                   Generate public interface (`.mbti`) files for all packages in the module
+              add                    Add a dependency
+              remove                 Remove a dependency
+              install                Install dependencies
+              tree                   Display the dependency tree
+              login                  Log in to your account
+              register               Register an account at mooncakes.io
+              publish                Publish the current package
+              update                 Update the package registry index
+              coverage               Code coverage utilities
+              generate-build-matrix  Generate build matrix for benchmarking (legacy feature)
+              upgrade                Upgrade toolchains
+              version                Print version info and exit
+              help                   Print this message or the help of the given subcommand(s)
+
+            Options:
+                  --source-dir <SOURCE_DIR>  The source code directory. Defaults to the current directory
+                  --target-dir <TARGET_DIR>  The target directory. Defaults to `source_dir/target`
+              -q, --quiet                    Suppress output
+              -v, --verbose                  Increase verbosity
+                  --trace                    Trace the execution of the program
+                  --dry-run                  Do not actually run the command
+              -h, --help                     Print help
+        "#]],
+    );
+}
+
+#[test]
+#[cfg(unix)]
+fn test_bench4() {
+    let dir = TestDir::new_empty();
+    get_stdout_with_args(&dir, ["generate-build-matrix", "-n", "4", "-o", "bench4"]);
+    check(
+        &get_stdout_with_args(
+            &dir,
+            [
+                "run",
+                "--source-dir",
+                "./bench4",
+                "--target-dir",
+                "./bench4/target",
+                "main",
+            ],
+        ),
+        expect![[r#"
+            ok
+        "#]],
+    );
+
+    get_stdout_with_args(
+        &dir,
+        [
+            "run",
+            "--source-dir",
+            "./bench4",
+            "--target-dir",
+            "./bench4/target",
+            "--trace",
+            "main",
+        ],
+    );
+
+    let trace_file = dunce::canonicalize(dir.join("./trace.json")).unwrap();
+    let t = std::fs::read_to_string(trace_file).unwrap();
+    assert!(t.contains("moonbit::build::read"));
+    assert!(t.contains(r#""name":"work.run""#));
+    assert!(t.contains(r#""name":"run""#));
+    assert!(t.contains(r#""name":"main""#));
+}
+
+#[test]
+fn test_moon_version() {
+    let dir = TestDir::new_empty();
+    let output = get_stdout_with_args(&dir, ["version"]);
+    assert!(output.contains(&format!("moon {}", get_cargo_pkg_version())));
+}
+
+#[test]
+fn test_moon_version_json() -> anyhow::Result<()> {
+    let dir = TestDir::new_empty();
+
+    let output = get_stdout_with_args(&dir, ["version", "--json"]);
+    let items: moonutil::common::VersionItems = serde_json_lenient::from_str(&output)?;
+    assert_eq!(items.items.len(), 1);
+    assert_eq!(items.items[0].name, "moon");
+    assert!(items.items[0].version.contains(&get_cargo_pkg_version()));
+    assert!(items.items[0].path.is_some());
+
+    let output = get_stdout_with_args(&dir, ["version", "--all", "--json"]);
+    let items: moonutil::common::VersionItems = serde_json_lenient::from_str(&output)?;
+    assert_eq!(items.items.len(), 3);
+    assert_eq!(items.items[0].name, "moon");
+    assert!(items.items[0].version.contains(&get_cargo_pkg_version()));
+    assert_eq!(items.items[1].name, "moonc");
+
+    let output = get_stdout_with_args(&dir, ["version", "--all", "--json", "--no-path"]);
+    let items: moonutil::common::VersionItems = serde_json_lenient::from_str(&output)?;
+    assert!(items.items[0].path.is_none());
+
+    Ok(())
+}
+
+#[test]
+fn test_moon_new_exist() {
+    let dir = TestDir::new("moon_new_exist.in");
+    dir.join("hello").rm_rf();
+    let res = &get_stdout_with_args(
+        &dir,
+        [
+            "new",
+            "--path",
+            "hello",
+            "--user",
+            "moonbitlang",
+            "--name",
+            "hello",
+        ],
+    );
+
+    assert!(res.contains("Created hello"));
+    assert!(res.contains("Initialized empty Git repository"));
+
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(dir.join("hello"))
+        .args([
+            "new",
+            "--path",
+            ".",
+            "--user",
+            "moonbitlang",
+            "--name",
+            "hello",
+        ])
+        .assert()
+        .failure();
+
+    dir.join("hello").rm_rf();
+}
+
+#[test]
+fn test_moon_new_new() {
+    let dir = TestDir::new("moon_new_new.in");
+
+    let hello1 = dir.join("hello");
+    if hello1.exists() {
+        hello1.rm_rf()
+    }
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args([
+            "new",
+            "--path",
+            "hello",
+            "--user",
+            "moonbitlang",
+            "--name",
+            "hello",
+        ])
+        .assert()
+        .success();
+    check(
+        &get_stdout_with_args(&hello1, ["run", "main"]),
+        expect![[r#"
+            Hello, world!
+        "#]],
+    );
+    hello1.rm_rf();
+
+    let hello2 = dir.join("hello2");
+    std::fs::create_dir_all(&hello2).unwrap();
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&hello2)
+        .args([
+            "new",
+            "--path",
+            ".",
+            "--user",
+            "moonbitlang",
+            "--name",
+            "hello",
+        ])
+        .assert()
+        .success();
+    check(
+        &get_stdout_with_args(&hello2, ["run", "main"]),
+        expect![[r#"
+            Hello, world!
+        "#]],
+    );
+    hello2.rm_rf();
+
+    let hello3 = dir.join("hello3");
+    if hello3.exists() {
+        hello3.rm_rf();
+    }
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args([
+            "new",
+            "--lib",
+            "--path",
+            "hello3",
+            "--user",
+            "moonbitlang",
+            "--name",
+            "hello",
+        ])
+        .assert()
+        .success();
+    check(
+        &get_stdout_with_args(&hello3, ["test", "-v"]),
+        expect![[r#"
+            test moonbitlang/hello/lib/hello_wbtest.mbt::hello ok
+            Total tests: 1, passed: 1, failed: 0.
+        "#]],
+    );
+    check(
+        &get_stdout_with_args(&hello3, ["test"]),
+        expect![[r#"
+            Total tests: 1, passed: 1, failed: 0.
+        "#]],
+    );
+    hello3.rm_rf();
+
+    let hello4 = dir.join("hello4");
+    std::fs::create_dir_all(&hello4).unwrap();
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&hello4)
+        .args([
+            "new",
+            "--lib",
+            "--path",
+            ".",
+            "--user",
+            "moonbitlang",
+            "--name",
+            "hello",
+        ])
+        .assert()
+        .success();
+    check(
+        &std::fs::read_to_string(hello4.join("moon.pkg.json")).unwrap(),
+        expect![[r#"
+            {
+              "import": [
+                "moonbitlang/hello/lib"
+              ]
+            }
+        "#]],
+    );
+    check(
+        &get_stdout_with_args(&hello4, ["test", "-v"]),
+        expect![[r#"
+            test moonbitlang/hello/lib/hello_wbtest.mbt::hello ok
+            Total tests: 1, passed: 1, failed: 0.
+        "#]],
+    );
+    hello4.rm_rf();
+}
+
+#[test]
+#[ignore = "todo"]
+fn test_moon_new_interactive() {
+    let dir = TestDir::new("moon_new_new.in");
+
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["new"])
+        .stdin("hello5\nexec\nmoonbitlang\nhello5\n\n")
+        .assert()
+        .success();
+    check(
+        &std::fs::read_to_string(dir.join("hello5").join("moon.mod.json")).unwrap(),
+        expect![[r#"
+            {
+              "name": "moonbitlang/hello5",
+              "version": "0.1.0",
+              "readme": "README.md",
+              "repository": "",
+              "license": "",
+              "keywords": [],
+              "description": ""
+            }"#]],
+    );
+    dir.join("hello5").rm_rf();
+
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["new"])
+        .stdin("hello6\nlib\nmoonbitlang\nhello6\n")
+        .assert()
+        .success();
+    check(
+        &std::fs::read_to_string(dir.join("hello6").join("moon.pkg.json")).unwrap(),
+        expect![[r#"
+            {
+              "import": [
+                "moonbitlang/hello6/lib"
+              ]
+            }
+        "#]],
+    );
+    dir.join("hello6").rm_rf();
+}
+
+#[test]
+fn test_moon_new_snapshot() {
+    let dir = TestDir::new("moon_new_snapshot.in");
+
+    let hello = dir.join("hello");
+    if hello.exists() {
+        hello.rm_rf();
+    }
+
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["new", "hello", "--no-license"])
+        .assert()
+        .success();
+    check(
+        &std::fs::read_to_string(hello.join("lib").join("hello.mbt")).unwrap(),
+        expect![[r#"
+            pub fn hello() -> String {
+              "Hello, world!"
+            }
+        "#]],
+    );
+    assert!(!hello.join("LICENSE").exists());
+
+    if hello.exists() {
+        hello.rm_rf();
+    }
+
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args([
+            "new",
+            "--path",
+            "hello",
+            "--user",
+            "moonbitlang",
+            "--name",
+            "hello",
+        ])
+        .assert()
+        .success();
+    check(
+        &std::fs::read_to_string(hello.join("lib").join("hello.mbt")).unwrap(),
+        expect![[r#"
+            pub fn hello() -> String {
+              "Hello, world!"
+            }
+        "#]],
+    );
+    check(
+        &std::fs::read_to_string(hello.join("lib").join("hello_wbtest.mbt")).unwrap(),
+        expect![[r#"
+            test "hello" {
+              if hello() != "Hello, world!" {
+                raise "hello() != \"Hello, world!\""
+              }
+            }
+        "#]],
+    );
+    check(
+        &std::fs::read_to_string(hello.join("lib").join("moon.pkg.json")).unwrap(),
+        expect!["{}"],
+    );
+    check(
+        &std::fs::read_to_string(hello.join("main").join("main.mbt")).unwrap(),
+        expect![[r#"
+            fn main {
+              println(@lib.hello())
+            }
+        "#]],
+    );
+    check(
+        &std::fs::read_to_string(hello.join("main").join("moon.pkg.json")).unwrap(),
+        expect![[r#"
+            {
+              "is-main": true,
+              "import": [
+                "moonbitlang/hello/lib"
+              ]
+            }"#]],
+    );
+    check(
+        &std::fs::read_to_string(hello.join("moon.mod.json")).unwrap(),
+        expect![[r#"
+            {
+              "name": "moonbitlang/hello",
+              "version": "0.1.0",
+              "readme": "README.md",
+              "repository": "",
+              "license": "Apache-2.0",
+              "keywords": [],
+              "description": ""
+            }"#]],
+    );
+    let license_content = std::fs::read_to_string(hello.join("LICENSE")).unwrap();
+    assert!(license_content.contains("Apache License"));
+    assert!(license_content.contains("Version 2.0, January 2004"));
+    hello.rm_rf();
+}
+
+#[test]
+fn test_moon_new_snapshot_lib() {
+    let dir = TestDir::new("moon_new_snapshot.in");
+
+    let hello = dir.join("hello_lib");
+
+    if hello.exists() {
+        hello.rm_rf()
+    }
+
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["new", "--lib", "hello_lib", "--no-license"])
+        .assert()
+        .success();
+    check(
+        &std::fs::read_to_string(hello.join("lib").join("hello.mbt")).unwrap(),
+        expect![[r#"
+            pub fn hello() -> String {
+              "Hello, world!"
+            }
+        "#]],
+    );
+
+    if hello.exists() {
+        hello.rm_rf()
+    }
+
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args([
+            "new",
+            "--lib",
+            "--path",
+            "hello_lib",
+            "--user",
+            "moonbitlang",
+            "--name",
+            "hello",
+            "--no-license",
+        ])
+        .assert()
+        .success();
+    check(
+        &std::fs::read_to_string(hello.join("lib").join("hello.mbt")).unwrap(),
+        expect![[r#"
+            pub fn hello() -> String {
+              "Hello, world!"
+            }
+        "#]],
+    );
+    check(
+        &std::fs::read_to_string(hello.join("lib").join("hello_wbtest.mbt")).unwrap(),
+        expect![[r#"
+            test "hello" {
+              if hello() != "Hello, world!" {
+                raise "hello() != \"Hello, world!\""
+              }
+            }
+        "#]],
+    );
+    check(
+        &std::fs::read_to_string(hello.join("lib").join("moon.pkg.json")).unwrap(),
+        expect!["{}"],
+    );
+    check(
+        &std::fs::read_to_string(hello.join("moon.pkg.json")).unwrap(),
+        expect![[r#"
+            {
+              "import": [
+                "moonbitlang/hello/lib"
+              ]
+            }
+        "#]],
+    );
+    check(
+        &std::fs::read_to_string(hello.join("moon.mod.json")).unwrap(),
+        expect![[r#"
+            {
+              "name": "moonbitlang/hello",
+              "version": "0.1.0",
+              "readme": "README.md",
+              "repository": "",
+              "license": "",
+              "keywords": [],
+              "description": ""
+            }"#]],
+    );
+    check(
+        &std::fs::read_to_string(hello.join("top.mbt")).unwrap(),
+        expect![[r#"
+            pub fn greeting() -> Unit {
+              println(@lib.hello())
+            }
+        "#]],
+    );
+    check(
+        &std::fs::read_to_string(hello.join("README.md")).unwrap(),
+        expect!["# moonbitlang/hello"],
+    );
+    hello.rm_rf();
+}
+
+#[test]
+fn test_moon_test() {
+    let dir = TestDir::new("moon_test.in");
+
+    let out = snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["test", "--sort-input"])
+        .assert()
+        .failure()
+        .get_output()
+        .stdout
+        .to_owned();
+
+    let s = std::str::from_utf8(&out).unwrap().to_string();
+
+    check(
+        &s,
+        expect![[r#"
+            test moontest/lib2/hello_wbtest.mbt::0 failed: hello() != "Hello, World"
+            test moontest/lib2/nested/lib_wbtest.mbt::0 failed: add1(1) should be 2
+            Total tests: 10, passed: 8, failed: 2.
+        "#]],
+    );
+}
+
+#[test]
+fn test_moon_test_filter_package() {
+    let dir = TestDir::new("test_filter.in");
+
+    check(
+        &get_stdout_with_args(&dir, ["test", "-p", "username/hello/A", "--sort-input"]),
+        expect![[r#"
+            test A
+            test B
+            test C
+            test D
+            test hello_0
+            test hello_1
+            test hello_2
+            Total tests: 7, passed: 7, failed: 0.
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args(&dir, ["test", "-p", "username/hello/lib", "--sort-input"]),
+        expect![[r#"
+            test A
+            test hello_0
+            test hello_1
+            Total tests: 3, passed: 3, failed: 0.
+        "#]],
+    );
+}
+
+#[test]
+fn test_moon_test_filter_multi_package() {
+    let dir = TestDir::new("test_filter_pkg_with_test_imports.in");
+
+    check(
+        &get_stdout_with_args(
+            &dir,
+            [
+                "test",
+                "-p",
+                "username/hello/lib",
+                "username/hello/lib1",
+                "username/hello/lib2",
+                "--sort-input",
+            ],
+        ),
+        expect![[r#"
+            Hello from lib1
+
+            Hello from lib2
+
+            Hello from lib7
+            Hello from lib3
+
+            Hello from lib4
+            Total tests: 4, passed: 4, failed: 0.
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args(
+            &dir,
+            [
+                "test",
+                "-p",
+                "username/hello/lib",
+                "username/hello/lib1",
+                "username/hello/lib2",
+                "-p",
+                "username/hello/lib3",
+                "--sort-input",
+            ],
+        ),
+        expect![[r#"
+            Hello from lib1
+
+            Hello from lib2
+
+            Hello from lib7
+            Hello from lib3
+
+            Hello from lib4
+            Hello from lib3
+
+            Hello from lib7
+            Hello from lib6
+            Total tests: 7, passed: 7, failed: 0.
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args(
+            &dir,
+            [
+                "test",
+                "-p",
+                "username/hello/lib",
+                "username/hello/lib1",
+                "username/hello/lib2",
+                "-f",
+                "lib.mbt",
+                "-p",
+                "username/hello/lib3",
+                "--sort-input",
+            ],
+        ),
+        expect![[r#"
+            Hello from lib1
+
+            Hello from lib2
+
+            Hello from lib3
+
+            Hello from lib4
+            Hello from lib3
+
+            Hello from lib7
+            Total tests: 5, passed: 5, failed: 0.
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args(
+            &dir,
+            [
+                "test",
+                "-p",
+                "username/hello/lib",
+                "username/hello/lib1",
+                "username/hello/lib2",
+                "-f",
+                "lib.mbt",
+                "-p",
+                "username/hello/lib3",
+                "-i",
+                "0",
+                "--sort-input",
+            ],
+        ),
+        expect![[r#"
+            Hello from lib1
+
+            Hello from lib2
+
+            Hello from lib3
+
+            Hello from lib4
+            Hello from lib3
+
+            Total tests: 4, passed: 4, failed: 0.
+        "#]],
+    );
+}
+#[test]
+fn test_moon_test_filter_package_with_deps() {
+    let dir = TestDir::new("test_filter_pkg_with_deps.in");
+
+    check(
+        &get_stdout_with_args(&dir, ["test", "-p", "username/hello/lib"]),
+        expect![[r#"
+            Hello from lib1
+            Hello from lib2
+            Hello from lib4
+
+            Hello from lib3
+            Hello from lib4
+
+
+            Total tests: 1, passed: 1, failed: 0.
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args(&dir, ["test", "-p", "username/hello/lib2"]),
+        expect![[r#"
+            Hello from lib2
+            Hello from lib4
+
+            Total tests: 1, passed: 1, failed: 0.
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args(&dir, ["test", "-p", "username/hello/lib4"]),
+        expect![[r#"
+            Hello from lib4
+            Total tests: 1, passed: 1, failed: 0.
+        "#]],
+    );
+}
+
+#[test]
+fn test_moon_test_filter_package_with_test_imports() {
+    let dir = TestDir::new("test_filter_pkg_with_test_imports.in");
+
+    check(
+        &get_stdout_with_args(&dir, ["test", "-p", "username/hello/lib"]),
+        expect![[r#"
+            Hello from lib1
+
+            Hello from lib2
+
+            Hello from lib7
+            Total tests: 2, passed: 2, failed: 0.
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args(&dir, ["test", "-p", "username/hello/lib1"]),
+        expect![[r#"
+            Hello from lib3
+
+            Total tests: 1, passed: 1, failed: 0.
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args(&dir, ["test", "-p", "username/hello/lib2"]),
+        expect![[r#"
+            Hello from lib4
+            Total tests: 1, passed: 1, failed: 0.
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args(&dir, ["test", "-p", "username/hello/lib3"]),
+        expect![[r#"
+            Hello from lib3
+
+            Hello from lib7
+            Hello from lib6
+            Total tests: 3, passed: 3, failed: 0.
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args(&dir, ["test", "-p", "username/hello/lib4"]),
+        expect![[r#"
+            Hello from lib5
+            Hello from lib5
+            Hello from lib7
+            Total tests: 3, passed: 3, failed: 0.
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args(&dir, ["test", "-p", "username/hello/lib5"]),
+        expect![[r#"
+            Hello from lib5
+            Total tests: 1, passed: 1, failed: 0.
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args(&dir, ["test", "-p", "username/hello/lib6"]),
+        expect![[r#"
+            Hello from lib6
+            Total tests: 1, passed: 1, failed: 0.
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args(&dir, ["test", "-p", "username/hello/lib7"]),
+        expect![[r#"
+            Hello from lib7
+            Hello from lib6
+            Total tests: 2, passed: 2, failed: 0.
+        "#]],
+    );
+}
+
+#[test]
+fn test_moon_test_filter_package_dry_run() {
+    let dir = TestDir::new("test_filter.in");
+
+    check(
+        &get_stdout_with_args_and_replace_dir(
+            &dir,
+            [
+                "test",
+                "-p",
+                "username/hello/A",
+                "--dry-run",
+                "--sort-input",
+            ],
+        ),
+        expect![[r#"
+            moon generate-test-driver --source-dir . --target-dir ./target/wasm-gc/debug/test --package username/hello/A --sort-input --target wasm-gc
+            moonc build-package ./A/hello.mbt ./A/test.mbt ./A/hello_wbtest.mbt ./target/wasm-gc/debug/test/A/__generated_driver_for_underscore_test.mbt -o ./target/wasm-gc/debug/test/A/A.underscore_test.core -pkg username/hello/A -is-main -std-path $MOON_HOME/lib/core/target/wasm-gc/release/bundle -pkg-sources username/hello/A:./A -target wasm-gc -g
+            moonc link-core $MOON_HOME/lib/core/target/wasm-gc/release/bundle/core.core ./target/wasm-gc/debug/test/A/A.underscore_test.core -main username/hello/A -o ./target/wasm-gc/debug/test/A/A.underscore_test.wasm -test-mode -pkg-sources username/hello/A:./A -pkg-sources moonbitlang/core:$MOON_HOME/lib/core -target wasm-gc -g
+            moonc build-package ./A/hello.mbt ./A/test.mbt ./target/wasm-gc/debug/test/A/__generated_driver_for_internal_test.mbt -o ./target/wasm-gc/debug/test/A/A.internal_test.core -pkg username/hello/A -is-main -std-path $MOON_HOME/lib/core/target/wasm-gc/release/bundle -pkg-sources username/hello/A:./A -target wasm-gc -g
+            moonc link-core $MOON_HOME/lib/core/target/wasm-gc/release/bundle/core.core ./target/wasm-gc/debug/test/A/A.internal_test.core -main username/hello/A -o ./target/wasm-gc/debug/test/A/A.internal_test.wasm -test-mode -pkg-sources username/hello/A:./A -pkg-sources moonbitlang/core:$MOON_HOME/lib/core -target wasm-gc -g
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args_and_replace_dir(&dir, ["test", "--dry-run", "--sort-input"]),
+        expect![[r#"
+            moon generate-test-driver --source-dir . --target-dir ./target/wasm-gc/debug/test --sort-input --target wasm-gc
+            moonc build-package ./lib2/lib.mbt ./target/wasm-gc/debug/test/lib2/__generated_driver_for_internal_test.mbt -o ./target/wasm-gc/debug/test/lib2/lib2.internal_test.core -pkg username/hello/lib2 -is-main -std-path $MOON_HOME/lib/core/target/wasm-gc/release/bundle -pkg-sources username/hello/lib2:./lib2 -target wasm-gc -g
+            moonc link-core $MOON_HOME/lib/core/target/wasm-gc/release/bundle/core.core ./target/wasm-gc/debug/test/lib2/lib2.internal_test.core -main username/hello/lib2 -o ./target/wasm-gc/debug/test/lib2/lib2.internal_test.wasm -test-mode -pkg-sources username/hello/lib2:./lib2 -pkg-sources moonbitlang/core:$MOON_HOME/lib/core -target wasm-gc -g
+            moonc build-package ./lib/hello.mbt ./lib/hello_wbtest.mbt ./target/wasm-gc/debug/test/lib/__generated_driver_for_underscore_test.mbt -o ./target/wasm-gc/debug/test/lib/lib.underscore_test.core -pkg username/hello/lib -is-main -std-path $MOON_HOME/lib/core/target/wasm-gc/release/bundle -pkg-sources username/hello/lib:./lib -target wasm-gc -g
+            moonc link-core $MOON_HOME/lib/core/target/wasm-gc/release/bundle/core.core ./target/wasm-gc/debug/test/lib/lib.underscore_test.core -main username/hello/lib -o ./target/wasm-gc/debug/test/lib/lib.underscore_test.wasm -test-mode -pkg-sources username/hello/lib:./lib -pkg-sources moonbitlang/core:$MOON_HOME/lib/core -target wasm-gc -g
+            moonc build-package ./lib/hello.mbt ./target/wasm-gc/debug/test/lib/__generated_driver_for_internal_test.mbt -o ./target/wasm-gc/debug/test/lib/lib.internal_test.core -pkg username/hello/lib -is-main -std-path $MOON_HOME/lib/core/target/wasm-gc/release/bundle -pkg-sources username/hello/lib:./lib -target wasm-gc -g
+            moonc link-core $MOON_HOME/lib/core/target/wasm-gc/release/bundle/core.core ./target/wasm-gc/debug/test/lib/lib.internal_test.core -main username/hello/lib -o ./target/wasm-gc/debug/test/lib/lib.internal_test.wasm -test-mode -pkg-sources username/hello/lib:./lib -pkg-sources moonbitlang/core:$MOON_HOME/lib/core -target wasm-gc -g
+            moonc build-package ./A/hello.mbt ./A/test.mbt ./A/hello_wbtest.mbt ./target/wasm-gc/debug/test/A/__generated_driver_for_underscore_test.mbt -o ./target/wasm-gc/debug/test/A/A.underscore_test.core -pkg username/hello/A -is-main -std-path $MOON_HOME/lib/core/target/wasm-gc/release/bundle -pkg-sources username/hello/A:./A -target wasm-gc -g
+            moonc link-core $MOON_HOME/lib/core/target/wasm-gc/release/bundle/core.core ./target/wasm-gc/debug/test/A/A.underscore_test.core -main username/hello/A -o ./target/wasm-gc/debug/test/A/A.underscore_test.wasm -test-mode -pkg-sources username/hello/A:./A -pkg-sources moonbitlang/core:$MOON_HOME/lib/core -target wasm-gc -g
+            moonc build-package ./A/hello.mbt ./A/test.mbt ./target/wasm-gc/debug/test/A/__generated_driver_for_internal_test.mbt -o ./target/wasm-gc/debug/test/A/A.internal_test.core -pkg username/hello/A -is-main -std-path $MOON_HOME/lib/core/target/wasm-gc/release/bundle -pkg-sources username/hello/A:./A -target wasm-gc -g
+            moonc link-core $MOON_HOME/lib/core/target/wasm-gc/release/bundle/core.core ./target/wasm-gc/debug/test/A/A.internal_test.core -main username/hello/A -o ./target/wasm-gc/debug/test/A/A.internal_test.wasm -test-mode -pkg-sources username/hello/A:./A -pkg-sources moonbitlang/core:$MOON_HOME/lib/core -target wasm-gc -g
+        "#]],
+    );
+}
+
+#[test]
+fn test_moon_test_filter_file() {
+    let dir = TestDir::new("test_filter.in");
+
+    check(
+        &get_stdout_with_args(&dir, ["test", "-p", "username/hello/A", "-f", "hello.mbt"]),
+        expect![[r#"
+            test A
+            test B
+            Total tests: 2, passed: 2, failed: 0.
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args(
+            &dir,
+            ["test", "-p", "username/hello/lib", "-f", "hello_wbtest.mbt"],
+        ),
+        expect![[r#"
+            test hello_0
+            test hello_1
+            Total tests: 2, passed: 2, failed: 0.
+        "#]],
+    );
+}
+
+#[test]
+fn test_moon_test_filter_index() {
+    let dir = TestDir::new("test_filter.in");
+
+    check(
+        &get_stdout_with_args(
+            &dir,
+            [
+                "test",
+                "-p",
+                "username/hello/A",
+                "-f",
+                "hello.mbt",
+                "-i",
+                "1",
+            ],
+        ),
+        expect![[r#"
+            test B
+            Total tests: 1, passed: 1, failed: 0.
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args(
+            &dir,
+            [
+                "test",
+                "-p",
+                "username/hello/lib",
+                "-f",
+                "hello_wbtest.mbt",
+                "-i",
+                "0",
+            ],
+        ),
+        expect![[r#"
+            test hello_0
+            Total tests: 1, passed: 1, failed: 0.
+        "#]],
+    );
+}
+
+#[test]
+fn test_moon_test_filter_index_with_auto_update() {
+    let dir = TestDir::new("test_filter.in");
+
+    let _ = get_stdout_with_args(
+        &dir,
+        [
+            "test",
+            "-p",
+            "username/hello/lib2",
+            "-f",
+            "lib.mbt",
+            "-i",
+            "1",
+            "-u",
+        ],
+    );
+    check(
+        &replace_crlf_to_lf(&std::fs::read_to_string(dir.join("lib2").join("lib.mbt")).unwrap()),
+        expect![[r#"
+            test {
+              println(2)
+            }
+
+            test {
+              inspect(1, content="1")!
+              inspect(1 + 2, content="3")!
+              inspect("hello", content="hello")!
+              inspect([1, 2, 3], content="[1, 2, 3]")!
+            }
+
+            test {
+              inspect(2)!
+            }
+        "#]],
+    );
+
+    let dir = TestDir::new("test_filter.in");
+    let _ = get_stderr_with_args(
+        &dir,
+        [
+            "test",
+            "-p",
+            "username/hello/lib2",
+            "-f",
+            "lib.mbt",
+            "-i",
+            "1",
+            "-u",
+            "-l",
+            "2",
+        ],
+    );
+    check(
+        &replace_crlf_to_lf(&std::fs::read_to_string(dir.join("lib2").join("lib.mbt")).unwrap()),
+        expect![[r#"
+            test {
+              println(2)
+            }
+
+            test {
+              inspect(1, content="1")!
+              inspect(1 + 2, content="3")!
+              inspect("hello")!
+              inspect([1, 2, 3])!
+            }
+
+            test {
+              inspect(2)!
+            }
+        "#]],
+    );
+
+    let dir = TestDir::new("test_filter.in");
+    let _ = get_stderr_with_args(
+        &dir,
+        [
+            "test",
+            "-p",
+            "username/hello/lib2",
+            "-f",
+            "lib.mbt",
+            "-u",
+            "-l",
+            "1",
+        ],
+    );
+    check(
+        &replace_crlf_to_lf(&std::fs::read_to_string(dir.join("lib2").join("lib.mbt")).unwrap()),
+        expect![[r#"
+            test {
+              println(2)
+            }
+
+            test {
+              inspect(1, content="1")!
+              inspect(1 + 2)!
+              inspect("hello")!
+              inspect([1, 2, 3])!
+            }
+
+            test {
+              inspect(2, content="2")!
+            }
+        "#]],
+    );
+}
+
+#[test]
+fn test_moon_test_succ() {
+    std::env::set_var("NO_COLOR", "1");
+    let dir = TestDir::new("moon_test_succ.in");
+    check(
+        &get_stdout_with_args_and_replace_dir(&dir, ["test", "-v", "--sort-input"]),
+        expect![[r#"
+            [1001] Warning: Warning: Unused function 'add1'
+               ╭─[$ROOT/lib2/nested/lib.mbt:1:4]
+               │
+             1 │ fn add1(x : Int) -> Int {
+               │    ──┬─  
+               │      ╰─── Warning: Unused function 'add1'
+            ───╯
+            test moontest/lib/hello_wbtest.mbt::0 ok
+            test moontest/lib2/hello_wbtest.mbt::0 ok
+            test moontest/lib2/nested/lib_wbtest.mbt::1 ok
+            test moontest/lib2/nested/lib_wbtest.mbt::0 ok
+            test moontest/lib3/hello_wbtest.mbt::0 ok
+            test moontest/lib4/hello_wbtest.mbt::0 ok
+            Total tests: 6, passed: 6, failed: 0.
+        "#]],
+    );
+}
+
+#[test]
+fn test_moon_test_hello_exec() {
+    let dir = TestDir::new("moon_test_hello_exec.in");
+    check(
+        &get_stdout_with_args(&dir, ["run", "main"]),
+        expect![[r#"
+            Hello, world!
+        "#]],
+    );
+    check(
+        &get_stdout_with_args(&dir, ["test", "-v"]),
+        expect![[r#"
+            Warning: tests in the main package `moonbitlang/hello/main` will be ignored
+            this is lib test
+            test moonbitlang/hello/lib/hello_wbtest.mbt::0 ok
+            Total tests: 1, passed: 1, failed: 0.
+        "#]],
+    );
+    check(
+        &get_stdout_with_args_and_replace_dir(
+            &dir,
+            ["test", "--dry-run", "--debug", "--sort-input"],
+        ),
+        expect![[r#"
+            moon generate-test-driver --source-dir . --target-dir ./target/wasm-gc/debug/test --sort-input --target wasm-gc
+            moonc build-package ./lib/hello.mbt ./lib/hello_wbtest.mbt ./target/wasm-gc/debug/test/lib/__generated_driver_for_underscore_test.mbt -o ./target/wasm-gc/debug/test/lib/lib.underscore_test.core -pkg moonbitlang/hello/lib -is-main -std-path $MOON_HOME/lib/core/target/wasm-gc/release/bundle -pkg-sources moonbitlang/hello/lib:./lib -target wasm-gc -g
+            moonc link-core $MOON_HOME/lib/core/target/wasm-gc/release/bundle/core.core ./target/wasm-gc/debug/test/lib/lib.underscore_test.core -main moonbitlang/hello/lib -o ./target/wasm-gc/debug/test/lib/lib.underscore_test.wasm -test-mode -pkg-sources moonbitlang/hello/lib:./lib -pkg-sources moonbitlang/core:$MOON_HOME/lib/core -target wasm-gc -g
+            moonc build-package ./lib/hello.mbt ./target/wasm-gc/debug/test/lib/__generated_driver_for_internal_test.mbt -o ./target/wasm-gc/debug/test/lib/lib.internal_test.core -pkg moonbitlang/hello/lib -is-main -std-path $MOON_HOME/lib/core/target/wasm-gc/release/bundle -pkg-sources moonbitlang/hello/lib:./lib -target wasm-gc -g
+            moonc link-core $MOON_HOME/lib/core/target/wasm-gc/release/bundle/core.core ./target/wasm-gc/debug/test/lib/lib.internal_test.core -main moonbitlang/hello/lib -o ./target/wasm-gc/debug/test/lib/lib.internal_test.wasm -test-mode -pkg-sources moonbitlang/hello/lib:./lib -pkg-sources moonbitlang/core:$MOON_HOME/lib/core -target wasm-gc -g
+        "#]],
+    );
+}
+
+#[test]
+fn test_moon_test_hello_exec_fntest() {
+    let dir = TestDir::new("moon_test_hello_exec_fntest.in");
+    check(
+        &get_stdout_with_args(&dir, ["run", "main"]),
+        expect![[r#"
+            init in main/main.mbt
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args_and_replace_dir(&dir, ["test", "-v", "--dry-run", "--sort-input"]),
+        expect![[r#"
+            moon generate-test-driver --source-dir . --target-dir ./target/wasm-gc/debug/test --sort-input --target wasm-gc
+            moonc build-package ./lib/hello.mbt ./lib/hello_wbtest.mbt ./target/wasm-gc/debug/test/lib/__generated_driver_for_underscore_test.mbt -o ./target/wasm-gc/debug/test/lib/lib.underscore_test.core -pkg moonbitlang/hello/lib -is-main -std-path $MOON_HOME/lib/core/target/wasm-gc/release/bundle -pkg-sources moonbitlang/hello/lib:./lib -target wasm-gc -g
+            moonc link-core $MOON_HOME/lib/core/target/wasm-gc/release/bundle/core.core ./target/wasm-gc/debug/test/lib/lib.underscore_test.core -main moonbitlang/hello/lib -o ./target/wasm-gc/debug/test/lib/lib.underscore_test.wasm -test-mode -pkg-sources moonbitlang/hello/lib:./lib -pkg-sources moonbitlang/core:$MOON_HOME/lib/core -target wasm-gc -g
+            moonc build-package ./lib/hello.mbt ./target/wasm-gc/debug/test/lib/__generated_driver_for_internal_test.mbt -o ./target/wasm-gc/debug/test/lib/lib.internal_test.core -pkg moonbitlang/hello/lib -is-main -std-path $MOON_HOME/lib/core/target/wasm-gc/release/bundle -pkg-sources moonbitlang/hello/lib:./lib -target wasm-gc -g
+            moonc link-core $MOON_HOME/lib/core/target/wasm-gc/release/bundle/core.core ./target/wasm-gc/debug/test/lib/lib.internal_test.core -main moonbitlang/hello/lib -o ./target/wasm-gc/debug/test/lib/lib.internal_test.wasm -test-mode -pkg-sources moonbitlang/hello/lib:./lib -pkg-sources moonbitlang/core:$MOON_HOME/lib/core -target wasm-gc -g
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args(&dir, ["test", "-v", "--sort-input"]),
+        expect![[r#"
+            test in lib/hello.mbt
+            test moonbitlang/hello/lib/hello.mbt::0 ok
+            test in lib/hello_test.mbt
+            test moonbitlang/hello/lib/hello_wbtest.mbt::0 ok
+            Total tests: 2, passed: 2, failed: 0.
+        "#]],
+    );
+}
+
+#[test]
+fn test_moon_test_hello_lib() {
+    let dir = TestDir::new("moon_test_hello_lib.in");
+    check(
+        &get_stdout_with_args(&dir, ["test", "-v"]),
+        expect![[r#"
+            test moonbitlang/hello/lib/hello_wbtest.mbt::0 ok
+            Total tests: 1, passed: 1, failed: 0.
+        "#]],
+    );
+}
+
+#[test]
+fn test_moon_test_with_local_dep() {
+    let dir = TestDir::new("moon_test_with_local_dep.in");
+    check(
+        &get_stdout_with_args(&dir, ["test", "-v", "--frozen"]),
+        expect![[r#"
+            test hello31/lib/hello_wbtest.mbt::0 ok
+            Total tests: 1, passed: 1, failed: 0.
+        "#]],
+    );
+    check(
+        &get_stdout_with_args(&dir, ["run", "main", "--frozen"]),
+        expect![[r#"
+            Hello, world!
+        "#]],
+    );
+    // Run moon info
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["info", "--frozen"])
+        .assert()
+        .success();
+    // Check directory structure by listing all files
+    let root_dir = dir.as_ref().to_owned();
+    let dir = WalkDir::new(&dir)
+        .sort_by_file_name()
+        .into_iter()
+        .filter_map(|e| e.ok())
+        .map(|e| e.path().strip_prefix(&root_dir).unwrap().to_owned())
+        // Filter out target directory
+        .filter(|p| !p.starts_with("target"))
+        // Convert to string and join with newline
+        .map(|p| p.to_string_lossy().to_string())
+        .collect::<Vec<_>>();
+    let joined = dir.join("\n").replace('\\', "/"); // Normalize path separator
+    check(
+        &joined,
+        expect![[r#"
+
+            .gitignore
+            lib
+            lib/hello.mbt
+            lib/hello_wbtest.mbt
+            lib/lib.mbti
+            lib/moon.pkg.json
+            main
+            main/main.mbt
+            main/main.mbti
+            main/moon.pkg.json
+            mods
+            mods/lijunchen
+            mods/lijunchen/mooncake
+            mods/lijunchen/mooncake/lib
+            mods/lijunchen/mooncake/lib/hello.mbt
+            mods/lijunchen/mooncake/lib/hello_wbtest.mbt
+            mods/lijunchen/mooncake/lib/moon.pkg.json
+            mods/lijunchen/mooncake/moon.mod.json
+            mods/lijunchen/mooncake/moon.pkg.json
+            mods/lijunchen/mooncake/top.mbt
+            moon.mod.json"#]],
+    );
+}
+
+#[test]
+fn test_output_format() {
+    let dir = TestDir::new("output-format.in");
+
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["clean"])
+        .assert()
+        .success();
+
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["build", "-q"])
+        .assert()
+        .success();
+    assert!(dir
+        .join(format!(
+            "target/{}/release/build/main/main.wasm",
+            TargetBackend::default().to_backend_ext()
+        ))
+        .exists());
+    assert!(!dir
+        .join(format!(
+            "target/{}/release/build/main/main.wat",
+            TargetBackend::default().to_backend_ext()
+        ))
+        .exists());
+
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["clean"])
+        .assert()
+        .success();
+
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["build", "-q", "--output-wat"])
+        .assert()
+        .success();
+    assert!(dir
+        .join(format!(
+            "target/{}/release/build/main/main.wat",
+            TargetBackend::default().to_backend_ext()
+        ))
+        .exists());
+    assert!(!dir
+        .join(format!(
+            "target/{}/release/build/main/main.wasm",
+            TargetBackend::default().to_backend_ext()
+        ))
+        .exists());
+
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["clean"])
+        .assert()
+        .success();
+
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["run", "main"])
+        .assert()
+        .success();
+    assert!(!dir
+        .join(format!(
+            "target/{}/release/build/main/main.wat",
+            TargetBackend::default().to_backend_ext()
+        ))
+        .exists());
+    assert!(dir
+        .join(format!(
+            "target/{}/release/build/main/main.wasm",
+            TargetBackend::default().to_backend_ext()
+        ))
+        .exists());
+
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["clean"])
+        .assert()
+        .success();
+
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["run", "main", "--output-wat"])
+        .assert()
+        .failure();
+
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["clean"])
+        .assert()
+        .success();
+}
+
+#[test]
+fn test_simple_pkg() {
+    let dir = TestDir::new("simple-pkg-A-001.in");
+    check(
+        &get_stdout_with_args(&dir, ["run", "main"]),
+        expect![[r#"
+            A
+            main
+        "#]],
+    );
+
+    let dir = TestDir::new("simple-pkg-A-002.in");
+    check(
+        &get_stdout_with_args(&dir, ["run", "main"]),
+        expect![[r#"
+            A
+            main
+        "#]],
+    );
+
+    let dir = TestDir::new("simple-pkg-A-003.in");
+    check(
+        &get_stdout_with_args(&dir, ["run", "main"]),
+        expect![[r#"
+            A
+            main
+        "#]],
+    );
+
+    let dir = TestDir::new("simple-pkg-A-004.in");
+    check(
+        &get_stdout_with_args(&dir, ["run", "main"]),
+        expect![[r#"
+            A
+            main
+        "#]],
+    );
+
+    let dir = TestDir::new("simple-pkg-A-005.in");
+    check(
+        &get_stdout_with_args(&dir, ["run", "main"]),
+        expect![[r#"
+            A
+            main
+        "#]],
+    );
+
+    let dir = TestDir::new("simple-pkg-A-006.in");
+    check(
+        &get_stdout_with_args(&dir, ["run", "main"]),
+        expect![[r#"
+            main
+        "#]],
+    );
+
+    let dir = TestDir::new("simple-pkg-AB-001.in");
+    check(
+        &get_stdout_with_args(&dir, ["run", "main"]),
+        expect![[r#"
+            A
+            B
+            main
+        "#]],
+    );
+
+    let dir = TestDir::new("simple-pkg-AB-002.in");
+    check(
+        &get_stdout_with_args(&dir, ["run", "main"]),
+        expect![[r#"
+            A
+            B
+            main
+        "#]],
+    );
+
+    let dir = TestDir::new("simple-pkg-AB-003.in");
+    check(
+        &get_stdout_with_args(&dir, ["run", "main"]),
+        expect![[r#"
+            A
+            B
+            main
+        "#]],
+    );
+
+    let dir = TestDir::new("simple-pkg-AB-004.in");
+    check(
+        &get_stdout_with_args(&dir, ["run", "main"]),
+        expect![[r#"
+            A
+            B
+            main
+        "#]],
+    );
+}
+
+#[test]
+fn test_target_backend() {
+    let dir = TestDir::new("target-backend.in");
+    check(
+        &get_stdout_with_args(&dir, ["build", "--dry-run", "--nostd"]),
+        expect![[r#"
+            moonc build-package ./lib/hello.mbt -o ./target/wasm-gc/release/build/lib/lib.core -pkg hello/lib -pkg-sources hello/lib:./lib -target wasm-gc
+            moonc build-package ./main/main.mbt -o ./target/wasm-gc/release/build/main/main.core -pkg hello/main -is-main -i ./target/wasm-gc/release/build/lib/lib.mi:lib -pkg-sources hello/main:./main -target wasm-gc
+            moonc link-core ./target/wasm-gc/release/build/lib/lib.core ./target/wasm-gc/release/build/main/main.core -main hello/main -o ./target/wasm-gc/release/build/main/main.wasm -pkg-sources hello/lib:./lib -pkg-sources hello/main:./main -target wasm-gc
+        "#]],
+    );
+    check(
+        &get_stdout_with_args(
+            &dir,
+            ["build", "--dry-run", "--target", "wasm-gc", "--nostd"],
+        ),
+        expect![[r#"
+            moonc build-package ./lib/hello.mbt -o ./target/wasm-gc/release/build/lib/lib.core -pkg hello/lib -pkg-sources hello/lib:./lib -target wasm-gc
+            moonc build-package ./main/main.mbt -o ./target/wasm-gc/release/build/main/main.core -pkg hello/main -is-main -i ./target/wasm-gc/release/build/lib/lib.mi:lib -pkg-sources hello/main:./main -target wasm-gc
+            moonc link-core ./target/wasm-gc/release/build/lib/lib.core ./target/wasm-gc/release/build/main/main.core -main hello/main -o ./target/wasm-gc/release/build/main/main.wasm -pkg-sources hello/lib:./lib -pkg-sources hello/main:./main -target wasm-gc
+        "#]],
+    );
+    check(
+        &get_stdout_with_args(&dir, ["build", "--dry-run", "--target", "js", "--nostd"]),
+        expect![[r#"
+            moonc build-package ./lib/hello.mbt -o ./target/js/release/build/lib/lib.core -pkg hello/lib -pkg-sources hello/lib:./lib -target js
+            moonc build-package ./main/main.mbt -o ./target/js/release/build/main/main.core -pkg hello/main -is-main -i ./target/js/release/build/lib/lib.mi:lib -pkg-sources hello/main:./main -target js
+            moonc link-core ./target/js/release/build/lib/lib.core ./target/js/release/build/main/main.core -main hello/main -o ./target/js/release/build/main/main.js -pkg-sources hello/lib:./lib -pkg-sources hello/main:./main -target js
+        "#]],
+    );
+    check(
+        &get_stdout_with_args(&dir, ["build", "--dry-run", "--nostd"]),
+        expect![[r#"
+            moonc build-package ./lib/hello.mbt -o ./target/wasm-gc/release/build/lib/lib.core -pkg hello/lib -pkg-sources hello/lib:./lib -target wasm-gc
+            moonc build-package ./main/main.mbt -o ./target/wasm-gc/release/build/main/main.core -pkg hello/main -is-main -i ./target/wasm-gc/release/build/lib/lib.mi:lib -pkg-sources hello/main:./main -target wasm-gc
+            moonc link-core ./target/wasm-gc/release/build/lib/lib.core ./target/wasm-gc/release/build/main/main.core -main hello/main -o ./target/wasm-gc/release/build/main/main.wasm -pkg-sources hello/lib:./lib -pkg-sources hello/main:./main -target wasm-gc
+        "#]],
+    );
+    check(
+        &get_stdout_with_args(&dir, ["run", "main", "--dry-run", "--nostd"]),
+        expect![[r#"
+            moonc build-package ./lib/hello.mbt -o ./target/wasm-gc/release/build/lib/lib.core -pkg hello/lib -pkg-sources hello/lib:./lib -target wasm-gc
+            moonc build-package ./main/main.mbt -o ./target/wasm-gc/release/build/main/main.core -pkg hello/main -is-main -i ./target/wasm-gc/release/build/lib/lib.mi:lib -pkg-sources hello/main:./main -target wasm-gc
+            moonc link-core ./target/wasm-gc/release/build/lib/lib.core ./target/wasm-gc/release/build/main/main.core -main hello/main -o ./target/wasm-gc/release/build/main/main.wasm -pkg-sources hello/lib:./lib -pkg-sources hello/main:./main -target wasm-gc
+            moonrun ./target/wasm-gc/release/build/main/main.wasm
+        "#]],
+    );
+    check(
+        &get_stdout_with_args(
+            &dir,
+            ["run", "main", "--dry-run", "--target", "wasm-gc", "--nostd"],
+        ),
+        expect![[r#"
+            moonc build-package ./lib/hello.mbt -o ./target/wasm-gc/release/build/lib/lib.core -pkg hello/lib -pkg-sources hello/lib:./lib -target wasm-gc
+            moonc build-package ./main/main.mbt -o ./target/wasm-gc/release/build/main/main.core -pkg hello/main -is-main -i ./target/wasm-gc/release/build/lib/lib.mi:lib -pkg-sources hello/main:./main -target wasm-gc
+            moonc link-core ./target/wasm-gc/release/build/lib/lib.core ./target/wasm-gc/release/build/main/main.core -main hello/main -o ./target/wasm-gc/release/build/main/main.wasm -pkg-sources hello/lib:./lib -pkg-sources hello/main:./main -target wasm-gc
+            moonrun ./target/wasm-gc/release/build/main/main.wasm
+        "#]],
+    );
+    check(
+        &get_stdout_with_args(
+            &dir,
+            ["run", "main", "--dry-run", "--target", "js", "--nostd"],
+        ),
+        expect![[r#"
+            moonc build-package ./lib/hello.mbt -o ./target/js/release/build/lib/lib.core -pkg hello/lib -pkg-sources hello/lib:./lib -target js
+            moonc build-package ./main/main.mbt -o ./target/js/release/build/main/main.core -pkg hello/main -is-main -i ./target/js/release/build/lib/lib.mi:lib -pkg-sources hello/main:./main -target js
+            moonc link-core ./target/js/release/build/lib/lib.core ./target/js/release/build/main/main.core -main hello/main -o ./target/js/release/build/main/main.js -pkg-sources hello/lib:./lib -pkg-sources hello/main:./main -target js
+            node ./target/js/release/build/main/main.js
+        "#]],
+    );
+}
+
+#[test]
+fn test_test_error_report() {
+    let dir = TestDir::new("test_error_report.in");
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["test"])
+        .assert()
+        .failure();
+}
+
+#[test]
+fn test_moonbit_docs_example() {
+    let dir = TestDir::new("unicode_demo.in");
+    check(
+        &get_stdout_with_args(&dir, ["run", "main"]),
+        expect![[r#"
+            3
+        "#]],
+    );
+
+    let dir = TestDir::new("palindrome_string.in");
+    check(
+        &get_stdout_with_args(&dir, ["run", "main"]),
+        expect![[r#"
+        aba
+    "#]],
+    );
+
+    let dir = TestDir::new("avl_tree.in");
+    check(
+        &get_stdout_with_args(&dir, ["run", "main"]),
+        expect![[r#"
+            height of the tree: 6
+                    0
+                  1
+                    2
+                3
+                    4
+                  5
+                    6
+              7
+                    8
+                  9
+                    10
+                11
+                    12
+                  13
+                    14
+            15
+                    16
+                  17
+                    18
+                19
+                    20
+                  21
+                    22
+              23
+                  24
+                25
+                    26
+                  27
+                    28
+                      29
+            success
+        "#]],
+    );
+
+    let dir = TestDir::new("docstring-demo.in");
+    check(
+        &get_stdout_with_args(&dir, ["run", "main"]),
+        expect![[r#"
+            Hello, world!
+        "#]],
+    );
+
+    let dir = TestDir::new("multidimensional_arrays.in");
+    check(
+        &get_stdout_with_args(&dir, ["run", "main"]),
+        expect![[r#"
+        11
+    "#]],
+    );
+}
+
+#[test]
+fn test_moon_inline_test_001() {
+    let dir = TestDir::new("moon_inline_test_001.in");
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["test"])
+        .assert()
+        .success();
+
+    let dir = TestDir::new("moon_inline_test_002.in");
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["test"])
+        .assert()
+        .success();
+    let dir = TestDir::new("moon_inline_test_003.in");
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["test"])
+        .assert()
+        .failure();
+}
+
+#[test]
+fn test_moon_inline_test_004() {
+    let dir = TestDir::new("moon_inline_test_004.in");
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["test"])
+        .assert()
+        .failure();
+}
+
+#[test]
+fn test_moon_inline_test_order() {
+    let dir = TestDir::new("moon_inline_test_order.in");
+    check(
+        &get_stdout_with_args(&dir, ["test", "-v", "--sort-input"]),
+        expect![[r#"
+            executing A
+            executing A::hello.mbt::test_A
+            test username/hello/A/hello.mbt::1 ok
+            test username/hello/A/hello.mbt::0 ok
+            A_test.mbt::init
+            A_test.mbt::test_hello_A
+            test username/hello/A/A_wbtest.mbt::1 ok
+            test username/hello/A/A_wbtest.mbt::0 ok
+            executing B
+            executing B::hello.mbt::test_B
+            test username/hello/B/hello.mbt::1 ok
+            test username/hello/B/hello.mbt::0 ok
+            B_test.mbt::init
+            B_test.mbt::test_hello_B
+            test username/hello/B/B_wbtest.mbt::1 ok
+            test username/hello/B/B_wbtest.mbt::0 ok
+            Total tests: 8, passed: 8, failed: 0.
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args(&dir, ["run", "main", "--sort-input"]),
+        expect![[r#"
+            main.mbt::init
+        "#]],
+    );
+}
+
+#[test]
+fn test_error_duplicate_alias() {
+    let dir = TestDir::new("error_duplicate_alias.in");
+    let out = get_stderr_with_args(&dir, ["check"]);
+    assert!(out.contains("Duplicate alias `lib`"));
+}
+
+#[test]
+fn test_core_order() {
+    let dir = TestDir::new("core_order.in");
+    check(
+        &get_stdout_with_args(&dir, ["build", "--dry-run", "--nostd"]),
+        expect![[r#"
+            moonc build-package ./T/t.mbt -o ./target/wasm-gc/release/build/T/T.core -pkg lijunchen/hello/T -pkg-sources lijunchen/hello/T:./T -target wasm-gc
+            moonc build-package ./A/a.mbt -o ./target/wasm-gc/release/build/A/A.core -pkg lijunchen/hello/A -i ./target/wasm-gc/release/build/T/T.mi:T -pkg-sources lijunchen/hello/A:./A -target wasm-gc
+            moonc build-package ./B/b.mbt -o ./target/wasm-gc/release/build/B/B.core -pkg lijunchen/hello/B -i ./target/wasm-gc/release/build/T/T.mi:T -pkg-sources lijunchen/hello/B:./B -target wasm-gc
+            moonc build-package ./main/main.mbt -o ./target/wasm-gc/release/build/main/main.core -pkg lijunchen/hello/main -is-main -i ./target/wasm-gc/release/build/A/A.mi:A -i ./target/wasm-gc/release/build/B/B.mi:B -pkg-sources lijunchen/hello/main:./main -target wasm-gc
+            moonc link-core ./target/wasm-gc/release/build/T/T.core ./target/wasm-gc/release/build/A/A.core ./target/wasm-gc/release/build/B/B.core ./target/wasm-gc/release/build/main/main.core -main lijunchen/hello/main -o ./target/wasm-gc/release/build/main/main.wasm -pkg-sources lijunchen/hello/T:./T -pkg-sources lijunchen/hello/A:./A -pkg-sources lijunchen/hello/B:./B -pkg-sources lijunchen/hello/main:./main -target wasm-gc
+        "#]],
+    );
+}
+
+#[test]
+fn test_moon_bundle() {
+    let dir = TestDir::new("moon_bundle.in");
+    check(
+        &get_stdout_with_args(&dir, ["bundle", "--dry-run", "--sort-input"]),
+        expect![[r#"
+            moonc build-package ./A/lib.mbt -o ./target/wasm-gc/release/bundle/A/A.core -pkg moonbitlang/core/A -pkg-sources moonbitlang/core/A:./A -target wasm-gc
+            moonc build-package ./B/lib.mbt -o ./target/wasm-gc/release/bundle/B/B.core -pkg moonbitlang/core/B -i ./target/wasm-gc/release/bundle/A/A.mi:A -pkg-sources moonbitlang/core/B:./B -target wasm-gc
+            moonc build-package ./C/lib.mbt -o ./target/wasm-gc/release/bundle/C/C.core -pkg moonbitlang/core/C -i ./target/wasm-gc/release/bundle/A/A.mi:A -pkg-sources moonbitlang/core/C:./C -target wasm-gc
+            moonc build-package ./Orphan/lib.mbt -o ./target/wasm-gc/release/bundle/Orphan/Orphan.core -pkg moonbitlang/core/Orphan -pkg-sources moonbitlang/core/Orphan:./Orphan -target wasm-gc
+            moonc bundle-core ./target/wasm-gc/release/bundle/A/A.core ./target/wasm-gc/release/bundle/B/B.core ./target/wasm-gc/release/bundle/C/C.core ./target/wasm-gc/release/bundle/Orphan/Orphan.core -o ./target/wasm-gc/release/bundle/core.core
+        "#]],
+    );
+}
+
+#[cfg(unix)]
+#[test]
+fn test_expect_test() -> anyhow::Result<()> {
+    let tmp_dir_path = TestDir::new("expect_test.in");
+
+    let s = snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&tmp_dir_path)
+        .args(["test", "--update"])
+        .assert()
+        .success()
+        .get_output()
+        .stdout
+        .to_owned();
+    let out = std::str::from_utf8(&s).unwrap().to_string();
+
+    assert!(out.contains("Auto updating expect tests and retesting ..."));
+    assert!(out.contains("Total tests: 30, passed: 30, failed: 0."));
+    let updated =
+        std::fs::read_to_string(tmp_dir_path.as_ref().join("lib").join("hello.mbt")).unwrap();
+    assert!(updated.contains(r#"["a", "b", "c"]"#));
+
+    let s = snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&tmp_dir_path)
+        .args(["test", "--update"])
+        .assert()
+        .success()
+        .get_output()
+        .stdout
+        .to_owned();
+
+    let out = std::str::from_utf8(&s).unwrap().to_string();
+    assert!(out.contains("Total tests: 30, passed: 30, failed: 0."));
+    let out = std::fs::read_to_string(tmp_dir_path.as_ref().join("lib").join("hello_wbtest.mbt"))
+        .unwrap();
+    assert!(out.contains(r#"notbuf.expect(content="haha")!"#));
+    Ok(())
+}
+
+#[test]
+fn test_only_update_expect() {
+    let tmp_dir_path = TestDir::new("only_update_expect.in");
+
+    let _ = snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&tmp_dir_path)
+        .args([
+            "test",
+            "-p",
+            "username/hello/lib",
+            "-f",
+            "hello.mbt",
+            "-i",
+            "0",
+            "--update",
+        ])
+        .assert()
+        .failure()
+        .get_output()
+        .stdout
+        .to_owned();
+}
+
+#[test]
+fn test_need_link() {
+    let dir = TestDir::new("need_link.in");
+    check(
+        &get_stdout_with_args(&dir, ["build", "--dry-run", "--nostd", "--sort-input"]),
+        expect![[r#"
+            moonc build-package ./lib/hello.mbt -o ./target/wasm-gc/release/build/lib/lib.core -pkg username/hello/lib -pkg-sources username/hello/lib:./lib -target wasm-gc
+            moonc build-package ./main/main.mbt -o ./target/wasm-gc/release/build/main/main.core -pkg username/hello/main -is-main -i ./target/wasm-gc/release/build/lib/lib.mi:lib -pkg-sources username/hello/main:./main -target wasm-gc
+            moonc link-core ./target/wasm-gc/release/build/lib/lib.core ./target/wasm-gc/release/build/main/main.core -main username/hello/main -o ./target/wasm-gc/release/build/main/main.wasm -pkg-sources username/hello/lib:./lib -pkg-sources username/hello/main:./main -target wasm-gc
+            moonc link-core ./target/wasm-gc/release/build/lib/lib.core -main username/hello/lib -o ./target/wasm-gc/release/build/lib/lib.wasm -pkg-sources username/hello/lib:./lib -target wasm-gc
+        "#]],
+    );
+}
+
+#[test]
+fn test_backend_config() {
+    let dir = TestDir::new("backend_config.in");
+
+    let _ = get_stdout_with_args(&dir, ["build", "--output-wat"]);
+    let out = std::fs::read_to_string(dir.join(format!(
+        "target/{}/release/build/lib/lib.wat",
+        TargetBackend::default().to_backend_ext()
+    )))
+    .unwrap();
+    assert!(out.contains(&format!(
+        "(export \"hello_{}\")",
+        TargetBackend::default().to_backend_ext().replace('-', "_")
+    )));
+    check(
+        &get_stdout_with_args_and_replace_dir(&dir, ["build", "--dry-run", "--sort-input"]),
+        expect![[r#"
+            moonc build-package ./lib/hello.mbt -o ./target/wasm-gc/release/build/lib/lib.core -pkg username/hello/lib -std-path $MOON_HOME/lib/core/target/wasm-gc/release/bundle -pkg-sources username/hello/lib:./lib -target wasm-gc
+            moonc build-package ./main/main.mbt -o ./target/wasm-gc/release/build/main/main.core -pkg username/hello/main -is-main -std-path $MOON_HOME/lib/core/target/wasm-gc/release/bundle -i ./target/wasm-gc/release/build/lib/lib.mi:lib -pkg-sources username/hello/main:./main -target wasm-gc
+            moonc link-core $MOON_HOME/lib/core/target/wasm-gc/release/bundle/core.core ./target/wasm-gc/release/build/lib/lib.core ./target/wasm-gc/release/build/main/main.core -main username/hello/main -o ./target/wasm-gc/release/build/main/main.wasm -pkg-sources username/hello/lib:./lib -pkg-sources username/hello/main:./main -pkg-sources moonbitlang/core:$MOON_HOME/lib/core -target wasm-gc
+            moonc link-core $MOON_HOME/lib/core/target/wasm-gc/release/bundle/core.core ./target/wasm-gc/release/build/lib/lib.core -main username/hello/lib -o ./target/wasm-gc/release/build/lib/lib.wasm -pkg-sources username/hello/lib:./lib -pkg-sources moonbitlang/core:$MOON_HOME/lib/core -target wasm-gc -exported_functions=hello:hello_wasm_gc
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args(
+            &dir,
+            [
+                "build",
+                "--dry-run",
+                "--nostd",
+                "--target",
+                "wasm-gc",
+                "--sort-input",
+            ],
+        ),
+        expect![[r#"
+            moonc build-package ./lib/hello.mbt -o ./target/wasm-gc/release/build/lib/lib.core -pkg username/hello/lib -pkg-sources username/hello/lib:./lib -target wasm-gc
+            moonc build-package ./main/main.mbt -o ./target/wasm-gc/release/build/main/main.core -pkg username/hello/main -is-main -i ./target/wasm-gc/release/build/lib/lib.mi:lib -pkg-sources username/hello/main:./main -target wasm-gc
+            moonc link-core ./target/wasm-gc/release/build/lib/lib.core ./target/wasm-gc/release/build/main/main.core -main username/hello/main -o ./target/wasm-gc/release/build/main/main.wasm -pkg-sources username/hello/lib:./lib -pkg-sources username/hello/main:./main -target wasm-gc
+            moonc link-core ./target/wasm-gc/release/build/lib/lib.core -main username/hello/lib -o ./target/wasm-gc/release/build/lib/lib.wasm -pkg-sources username/hello/lib:./lib -target wasm-gc -exported_functions=hello:hello_wasm_gc
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args(
+            &dir,
+            [
+                "build",
+                "--dry-run",
+                "--nostd",
+                "--target",
+                "js",
+                "--sort-input",
+            ],
+        ),
+        expect![[r#"
+            moonc build-package ./lib/hello.mbt -o ./target/js/release/build/lib/lib.core -pkg username/hello/lib -pkg-sources username/hello/lib:./lib -target js
+            moonc build-package ./main/main.mbt -o ./target/js/release/build/main/main.core -pkg username/hello/main -is-main -i ./target/js/release/build/lib/lib.mi:lib -pkg-sources username/hello/main:./main -target js
+            moonc link-core ./target/js/release/build/lib/lib.core ./target/js/release/build/main/main.core -main username/hello/main -o ./target/js/release/build/main/main.js -pkg-sources username/hello/lib:./lib -pkg-sources username/hello/main:./main -target js
+            moonc link-core ./target/js/release/build/lib/lib.core -main username/hello/lib -o ./target/js/release/build/lib/lib.js -pkg-sources username/hello/lib:./lib -target js -exported_functions=hello:hello_js -js-format esm
+        "#]],
+    );
+}
+
+#[test]
+#[cfg(unix)]
+fn test_mbti() {
+    let dir = TestDir::new("mbti.in");
+    let _ = get_stdout_with_args(&dir, ["info"]);
+    let lib_mi_out = &std::fs::read_to_string(dir.join("lib").join("lib.mbti")).unwrap();
+    expect![[r#"
+        package username/hello/lib
+
+        // Values
+        fn hello() -> String
+
+        // Types and methods
+
+        // Traits
+
+        // Extension Methods
+
+    "#]]
+    .assert_eq(lib_mi_out);
+
+    let main_mi_out = &std::fs::read_to_string(dir.join("main").join("main.mbti")).unwrap();
+    expect![[r#"
+        package username/hello/main
+
+        // Values
+
+        // Types and methods
+
+        // Traits
+
+        // Extension Methods
+
+    "#]]
+    .assert_eq(main_mi_out);
+}
+
+#[test]
+fn test_dummy_core() {
+    let test_dir = TestDir::new("dummy-core.in");
+    let dir = test_dir.as_ref().canonicalize().unwrap();
+
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["check", "--sort-input"])
+        .assert()
+        .success();
+
+    #[cfg(unix)]
+    {
+        let p = dir.join(format!(
+            "target/{}/release/check/packages.json",
+            TargetBackend::default().to_backend_ext()
+        ));
+        check(
+            &replace_dir(&std::fs::read_to_string(p).unwrap(), &dir),
+            expect![[r#"
+                {
+                  "source_dir": "$ROOT",
+                  "name": "moonbitlang/core",
+                  "packages": [
+                    {
+                      "is-main": false,
+                      "is-third-party": false,
+                      "root": "moonbitlang/core",
+                      "rel": "0",
+                      "files": [
+                        "$ROOT/0/lib.mbt",
+                        "$ROOT/0/y.js.mbt",
+                        "$ROOT/0/y.wasm-gc.mbt",
+                        "$ROOT/0/y.wasm.mbt"
+                      ],
+                      "wbtest-files": [
+                        "$ROOT/0/y_wbtest.js.mbt",
+                        "$ROOT/0/y_wbtest.mbt",
+                        "$ROOT/0/y_wbtest.wasm-gc.mbt",
+                        "$ROOT/0/y_wbtest.wasm.mbt"
+                      ],
+                      "test-files": [],
+                      "deps": [],
+                      "wbtest-deps": [],
+                      "test-deps": [],
+                      "artifact": "$ROOT/target/wasm-gc/release/check/0/0.mi"
+                    },
+                    {
+                      "is-main": false,
+                      "is-third-party": false,
+                      "root": "moonbitlang/core",
+                      "rel": "1",
+                      "files": [
+                        "$ROOT/1/lib.mbt",
+                        "$ROOT/1/x.js.mbt",
+                        "$ROOT/1/x.wasm-gc.mbt",
+                        "$ROOT/1/x.wasm.mbt"
+                      ],
+                      "wbtest-files": [
+                        "$ROOT/1/x_wbtest.wasm-gc.mbt"
+                      ],
+                      "test-files": [],
+                      "deps": [],
+                      "wbtest-deps": [],
+                      "test-deps": [],
+                      "artifact": "$ROOT/target/wasm-gc/release/check/1/1.mi"
+                    },
+                    {
+                      "is-main": false,
+                      "is-third-party": false,
+                      "root": "moonbitlang/core",
+                      "rel": "2",
+                      "files": [
+                        "$ROOT/2/lib.mbt"
+                      ],
+                      "wbtest-files": [],
+                      "test-files": [],
+                      "deps": [
+                        {
+                          "path": "moonbitlang/core/1",
+                          "alias": "1"
+                        }
+                      ],
+                      "wbtest-deps": [],
+                      "test-deps": [],
+                      "artifact": "$ROOT/target/wasm-gc/release/check/2/2.mi"
+                    },
+                    {
+                      "is-main": false,
+                      "is-third-party": false,
+                      "root": "moonbitlang/core",
+                      "rel": "char",
+                      "files": [],
+                      "wbtest-files": [],
+                      "test-files": [],
+                      "deps": [
+                        {
+                          "path": "moonbitlang/core/coverage",
+                          "alias": "coverage"
+                        }
+                      ],
+                      "wbtest-deps": [],
+                      "test-deps": [],
+                      "artifact": "$ROOT/target/wasm-gc/release/check/char/char.mi"
+                    },
+                    {
+                      "is-main": false,
+                      "is-third-party": false,
+                      "root": "moonbitlang/core",
+                      "rel": "coverage",
+                      "files": [],
+                      "wbtest-files": [],
+                      "test-files": [],
+                      "deps": [],
+                      "wbtest-deps": [],
+                      "test-deps": [],
+                      "artifact": "$ROOT/target/wasm-gc/release/check/coverage/coverage.mi"
+                    },
+                    {
+                      "is-main": false,
+                      "is-third-party": false,
+                      "root": "moonbitlang/core",
+                      "rel": "iter",
+                      "files": [],
+                      "wbtest-files": [],
+                      "test-files": [],
+                      "deps": [
+                        {
+                          "path": "moonbitlang/core/coverage",
+                          "alias": "coverage"
+                        }
+                      ],
+                      "wbtest-deps": [
+                        {
+                          "path": "moonbitlang/core/char",
+                          "alias": "char"
+                        }
+                      ],
+                      "test-deps": [],
+                      "artifact": "$ROOT/target/wasm-gc/release/check/iter/iter.mi"
+                    }
+                  ],
+                  "deps": [],
+                  "backend": "wasm-gc"
+                }"#]],
+        );
+    }
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["check", "--target", "js", "--sort-input"])
+        .assert()
+        .success();
+
+    #[cfg(unix)]
+    {
+        let p = dir.join("target/js/release/check/packages.json");
+        check(
+            &replace_dir(&std::fs::read_to_string(p).unwrap(), &dir),
+            expect![[r#"
+                {
+                  "source_dir": "$ROOT",
+                  "name": "moonbitlang/core",
+                  "packages": [
+                    {
+                      "is-main": false,
+                      "is-third-party": false,
+                      "root": "moonbitlang/core",
+                      "rel": "0",
+                      "files": [
+                        "$ROOT/0/lib.mbt",
+                        "$ROOT/0/y.js.mbt",
+                        "$ROOT/0/y.wasm-gc.mbt",
+                        "$ROOT/0/y.wasm.mbt"
+                      ],
+                      "wbtest-files": [
+                        "$ROOT/0/y_wbtest.js.mbt",
+                        "$ROOT/0/y_wbtest.mbt",
+                        "$ROOT/0/y_wbtest.wasm-gc.mbt",
+                        "$ROOT/0/y_wbtest.wasm.mbt"
+                      ],
+                      "test-files": [],
+                      "deps": [],
+                      "wbtest-deps": [],
+                      "test-deps": [],
+                      "artifact": "$ROOT/target/js/release/check/0/0.mi"
+                    },
+                    {
+                      "is-main": false,
+                      "is-third-party": false,
+                      "root": "moonbitlang/core",
+                      "rel": "1",
+                      "files": [
+                        "$ROOT/1/lib.mbt",
+                        "$ROOT/1/x.js.mbt",
+                        "$ROOT/1/x.wasm-gc.mbt",
+                        "$ROOT/1/x.wasm.mbt"
+                      ],
+                      "wbtest-files": [
+                        "$ROOT/1/x_wbtest.wasm-gc.mbt"
+                      ],
+                      "test-files": [],
+                      "deps": [],
+                      "wbtest-deps": [],
+                      "test-deps": [],
+                      "artifact": "$ROOT/target/js/release/check/1/1.mi"
+                    },
+                    {
+                      "is-main": false,
+                      "is-third-party": false,
+                      "root": "moonbitlang/core",
+                      "rel": "2",
+                      "files": [
+                        "$ROOT/2/lib.mbt"
+                      ],
+                      "wbtest-files": [],
+                      "test-files": [],
+                      "deps": [
+                        {
+                          "path": "moonbitlang/core/1",
+                          "alias": "1"
+                        }
+                      ],
+                      "wbtest-deps": [],
+                      "test-deps": [],
+                      "artifact": "$ROOT/target/js/release/check/2/2.mi"
+                    },
+                    {
+                      "is-main": false,
+                      "is-third-party": false,
+                      "root": "moonbitlang/core",
+                      "rel": "char",
+                      "files": [],
+                      "wbtest-files": [],
+                      "test-files": [],
+                      "deps": [
+                        {
+                          "path": "moonbitlang/core/coverage",
+                          "alias": "coverage"
+                        }
+                      ],
+                      "wbtest-deps": [],
+                      "test-deps": [],
+                      "artifact": "$ROOT/target/js/release/check/char/char.mi"
+                    },
+                    {
+                      "is-main": false,
+                      "is-third-party": false,
+                      "root": "moonbitlang/core",
+                      "rel": "coverage",
+                      "files": [],
+                      "wbtest-files": [],
+                      "test-files": [],
+                      "deps": [],
+                      "wbtest-deps": [],
+                      "test-deps": [],
+                      "artifact": "$ROOT/target/js/release/check/coverage/coverage.mi"
+                    },
+                    {
+                      "is-main": false,
+                      "is-third-party": false,
+                      "root": "moonbitlang/core",
+                      "rel": "iter",
+                      "files": [],
+                      "wbtest-files": [],
+                      "test-files": [],
+                      "deps": [
+                        {
+                          "path": "moonbitlang/core/coverage",
+                          "alias": "coverage"
+                        }
+                      ],
+                      "wbtest-deps": [
+                        {
+                          "path": "moonbitlang/core/char",
+                          "alias": "char"
+                        }
+                      ],
+                      "test-deps": [],
+                      "artifact": "$ROOT/target/js/release/check/iter/iter.mi"
+                    }
+                  ],
+                  "deps": [],
+                  "backend": "js"
+                }"#]],
+        );
+    };
+
+    check(
+        &get_stdout_with_args_and_replace_dir(&dir, ["check", "--dry-run", "--sort-input"]),
+        expect![[r#"
+            moonc check -o ./target/wasm-gc/release/check/coverage/coverage.mi -pkg moonbitlang/core/coverage -pkg-sources moonbitlang/core/coverage:./coverage -target wasm-gc
+            moonc check -o ./target/wasm-gc/release/check/iter/iter.mi -pkg moonbitlang/core/iter -i ./target/wasm-gc/release/check/coverage/coverage.mi:coverage -pkg-sources moonbitlang/core/iter:./iter -target wasm-gc
+            moonc check -o ./target/wasm-gc/release/check/char/char.mi -pkg moonbitlang/core/char -i ./target/wasm-gc/release/check/coverage/coverage.mi:coverage -pkg-sources moonbitlang/core/char:./char -target wasm-gc
+            moonc check ./1/lib.mbt ./1/x.wasm-gc.mbt -o ./target/wasm-gc/release/check/1/1.mi -pkg moonbitlang/core/1 -pkg-sources moonbitlang/core/1:./1 -target wasm-gc
+            moonc check ./2/lib.mbt -o ./target/wasm-gc/release/check/2/2.mi -pkg moonbitlang/core/2 -i ./target/wasm-gc/release/check/1/1.mi:1 -pkg-sources moonbitlang/core/2:./2 -target wasm-gc
+            moonc check ./1/lib.mbt ./1/x.wasm-gc.mbt ./1/x_wbtest.wasm-gc.mbt -o ./target/wasm-gc/release/check/1/1.underscore_test.mi -pkg moonbitlang/core/1 -pkg-sources moonbitlang/core/1:./1 -target wasm-gc
+            moonc check ./0/lib.mbt ./0/y.wasm-gc.mbt ./0/y_wbtest.mbt ./0/y_wbtest.wasm-gc.mbt -o ./target/wasm-gc/release/check/0/0.underscore_test.mi -pkg moonbitlang/core/0 -pkg-sources moonbitlang/core/0:./0 -target wasm-gc
+            moonc check ./0/lib.mbt ./0/y.wasm-gc.mbt -o ./target/wasm-gc/release/check/0/0.mi -pkg moonbitlang/core/0 -pkg-sources moonbitlang/core/0:./0 -target wasm-gc
+        "#]],
+    );
+    check(
+        &get_stdout_with_args_and_replace_dir(
+            &dir,
+            ["check", "--dry-run", "--target", "wasm", "--sort-input"],
+        ),
+        expect![[r#"
+            moonc check -o ./target/wasm/release/check/coverage/coverage.mi -pkg moonbitlang/core/coverage -pkg-sources moonbitlang/core/coverage:./coverage -target wasm
+            moonc check -o ./target/wasm/release/check/iter/iter.mi -pkg moonbitlang/core/iter -i ./target/wasm/release/check/coverage/coverage.mi:coverage -pkg-sources moonbitlang/core/iter:./iter -target wasm
+            moonc check -o ./target/wasm/release/check/char/char.mi -pkg moonbitlang/core/char -i ./target/wasm/release/check/coverage/coverage.mi:coverage -pkg-sources moonbitlang/core/char:./char -target wasm
+            moonc check ./1/lib.mbt ./1/x.wasm.mbt -o ./target/wasm/release/check/1/1.mi -pkg moonbitlang/core/1 -pkg-sources moonbitlang/core/1:./1 -target wasm
+            moonc check ./2/lib.mbt -o ./target/wasm/release/check/2/2.mi -pkg moonbitlang/core/2 -i ./target/wasm/release/check/1/1.mi:1 -pkg-sources moonbitlang/core/2:./2 -target wasm
+            moonc check ./1/lib.mbt ./1/x.wasm.mbt -o ./target/wasm/release/check/1/1.underscore_test.mi -pkg moonbitlang/core/1 -pkg-sources moonbitlang/core/1:./1 -target wasm
+            moonc check ./0/lib.mbt ./0/y.wasm.mbt ./0/y_wbtest.mbt ./0/y_wbtest.wasm.mbt -o ./target/wasm/release/check/0/0.underscore_test.mi -pkg moonbitlang/core/0 -pkg-sources moonbitlang/core/0:./0 -target wasm
+            moonc check ./0/lib.mbt ./0/y.wasm.mbt -o ./target/wasm/release/check/0/0.mi -pkg moonbitlang/core/0 -pkg-sources moonbitlang/core/0:./0 -target wasm
+        "#]],
+    );
+    check(
+        &get_stdout_with_args_and_replace_dir(
+            &dir,
+            ["check", "--dry-run", "--target", "wasm-gc", "--sort-input"],
+        ),
+        expect![[r#"
+            moonc check -o ./target/wasm-gc/release/check/coverage/coverage.mi -pkg moonbitlang/core/coverage -pkg-sources moonbitlang/core/coverage:./coverage -target wasm-gc
+            moonc check -o ./target/wasm-gc/release/check/iter/iter.mi -pkg moonbitlang/core/iter -i ./target/wasm-gc/release/check/coverage/coverage.mi:coverage -pkg-sources moonbitlang/core/iter:./iter -target wasm-gc
+            moonc check -o ./target/wasm-gc/release/check/char/char.mi -pkg moonbitlang/core/char -i ./target/wasm-gc/release/check/coverage/coverage.mi:coverage -pkg-sources moonbitlang/core/char:./char -target wasm-gc
+            moonc check ./1/lib.mbt ./1/x.wasm-gc.mbt -o ./target/wasm-gc/release/check/1/1.mi -pkg moonbitlang/core/1 -pkg-sources moonbitlang/core/1:./1 -target wasm-gc
+            moonc check ./2/lib.mbt -o ./target/wasm-gc/release/check/2/2.mi -pkg moonbitlang/core/2 -i ./target/wasm-gc/release/check/1/1.mi:1 -pkg-sources moonbitlang/core/2:./2 -target wasm-gc
+            moonc check ./1/lib.mbt ./1/x.wasm-gc.mbt ./1/x_wbtest.wasm-gc.mbt -o ./target/wasm-gc/release/check/1/1.underscore_test.mi -pkg moonbitlang/core/1 -pkg-sources moonbitlang/core/1:./1 -target wasm-gc
+            moonc check ./0/lib.mbt ./0/y.wasm-gc.mbt ./0/y_wbtest.mbt ./0/y_wbtest.wasm-gc.mbt -o ./target/wasm-gc/release/check/0/0.underscore_test.mi -pkg moonbitlang/core/0 -pkg-sources moonbitlang/core/0:./0 -target wasm-gc
+            moonc check ./0/lib.mbt ./0/y.wasm-gc.mbt -o ./target/wasm-gc/release/check/0/0.mi -pkg moonbitlang/core/0 -pkg-sources moonbitlang/core/0:./0 -target wasm-gc
+        "#]],
+    );
+    check(
+        &get_stdout_with_args_and_replace_dir(
+            &dir,
+            ["check", "--dry-run", "--target", "js", "--sort-input"],
+        ),
+        expect![[r#"
+            moonc check -o ./target/js/release/check/coverage/coverage.mi -pkg moonbitlang/core/coverage -pkg-sources moonbitlang/core/coverage:./coverage -target js
+            moonc check -o ./target/js/release/check/iter/iter.mi -pkg moonbitlang/core/iter -i ./target/js/release/check/coverage/coverage.mi:coverage -pkg-sources moonbitlang/core/iter:./iter -target js
+            moonc check -o ./target/js/release/check/char/char.mi -pkg moonbitlang/core/char -i ./target/js/release/check/coverage/coverage.mi:coverage -pkg-sources moonbitlang/core/char:./char -target js
+            moonc check ./1/lib.mbt ./1/x.js.mbt -o ./target/js/release/check/1/1.mi -pkg moonbitlang/core/1 -pkg-sources moonbitlang/core/1:./1 -target js
+            moonc check ./2/lib.mbt -o ./target/js/release/check/2/2.mi -pkg moonbitlang/core/2 -i ./target/js/release/check/1/1.mi:1 -pkg-sources moonbitlang/core/2:./2 -target js
+            moonc check ./1/lib.mbt ./1/x.js.mbt -o ./target/js/release/check/1/1.underscore_test.mi -pkg moonbitlang/core/1 -pkg-sources moonbitlang/core/1:./1 -target js
+            moonc check ./0/lib.mbt ./0/y.js.mbt ./0/y_wbtest.js.mbt ./0/y_wbtest.mbt -o ./target/js/release/check/0/0.underscore_test.mi -pkg moonbitlang/core/0 -pkg-sources moonbitlang/core/0:./0 -target js
+            moonc check ./0/lib.mbt ./0/y.js.mbt -o ./target/js/release/check/0/0.mi -pkg moonbitlang/core/0 -pkg-sources moonbitlang/core/0:./0 -target js
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args_and_replace_dir(&dir, ["build", "--dry-run", "--sort-input"]),
+        expect![[r#"
+            moonc build-package ./1/lib.mbt ./1/x.wasm-gc.mbt -o ./target/wasm-gc/release/build/1/1.core -pkg moonbitlang/core/1 -pkg-sources moonbitlang/core/1:./1 -target wasm-gc
+            moonc build-package ./2/lib.mbt -o ./target/wasm-gc/release/build/2/2.core -pkg moonbitlang/core/2 -i ./target/wasm-gc/release/build/1/1.mi:1 -pkg-sources moonbitlang/core/2:./2 -target wasm-gc
+            moonc link-core ./target/wasm-gc/release/build/1/1.core ./target/wasm-gc/release/build/2/2.core -main moonbitlang/core/2 -o ./target/wasm-gc/release/build/2/2.wasm -pkg-sources moonbitlang/core/1:./1 -pkg-sources moonbitlang/core/2:./2 -target wasm-gc
+            moonc link-core ./target/wasm-gc/release/build/1/1.core -main moonbitlang/core/1 -o ./target/wasm-gc/release/build/1/1.wasm -pkg-sources moonbitlang/core/1:./1 -target wasm-gc
+            moonc build-package ./0/lib.mbt ./0/y.wasm-gc.mbt -o ./target/wasm-gc/release/build/0/0.core -pkg moonbitlang/core/0 -pkg-sources moonbitlang/core/0:./0 -target wasm-gc
+            moonc link-core ./target/wasm-gc/release/build/0/0.core -main moonbitlang/core/0 -o ./target/wasm-gc/release/build/0/0.wasm -pkg-sources moonbitlang/core/0:./0 -target wasm-gc
+        "#]],
+    );
+    check(
+        &get_stdout_with_args_and_replace_dir(
+            &dir,
+            ["build", "--dry-run", "--target", "wasm", "--sort-input"],
+        ),
+        expect![[r#"
+            moonc build-package ./1/lib.mbt ./1/x.wasm.mbt -o ./target/wasm/release/build/1/1.core -pkg moonbitlang/core/1 -pkg-sources moonbitlang/core/1:./1 -target wasm
+            moonc build-package ./2/lib.mbt -o ./target/wasm/release/build/2/2.core -pkg moonbitlang/core/2 -i ./target/wasm/release/build/1/1.mi:1 -pkg-sources moonbitlang/core/2:./2 -target wasm
+            moonc link-core ./target/wasm/release/build/1/1.core ./target/wasm/release/build/2/2.core -main moonbitlang/core/2 -o ./target/wasm/release/build/2/2.wasm -pkg-sources moonbitlang/core/1:./1 -pkg-sources moonbitlang/core/2:./2 -target wasm
+            moonc link-core ./target/wasm/release/build/1/1.core -main moonbitlang/core/1 -o ./target/wasm/release/build/1/1.wasm -pkg-sources moonbitlang/core/1:./1 -target wasm
+            moonc build-package ./0/lib.mbt ./0/y.wasm.mbt -o ./target/wasm/release/build/0/0.core -pkg moonbitlang/core/0 -pkg-sources moonbitlang/core/0:./0 -target wasm
+            moonc link-core ./target/wasm/release/build/0/0.core -main moonbitlang/core/0 -o ./target/wasm/release/build/0/0.wasm -pkg-sources moonbitlang/core/0:./0 -target wasm
+        "#]],
+    );
+    check(
+        &get_stdout_with_args_and_replace_dir(
+            &dir,
+            ["build", "--dry-run", "--target", "wasm-gc", "--sort-input"],
+        ),
+        expect![[r#"
+            moonc build-package ./1/lib.mbt ./1/x.wasm-gc.mbt -o ./target/wasm-gc/release/build/1/1.core -pkg moonbitlang/core/1 -pkg-sources moonbitlang/core/1:./1 -target wasm-gc
+            moonc build-package ./2/lib.mbt -o ./target/wasm-gc/release/build/2/2.core -pkg moonbitlang/core/2 -i ./target/wasm-gc/release/build/1/1.mi:1 -pkg-sources moonbitlang/core/2:./2 -target wasm-gc
+            moonc link-core ./target/wasm-gc/release/build/1/1.core ./target/wasm-gc/release/build/2/2.core -main moonbitlang/core/2 -o ./target/wasm-gc/release/build/2/2.wasm -pkg-sources moonbitlang/core/1:./1 -pkg-sources moonbitlang/core/2:./2 -target wasm-gc
+            moonc link-core ./target/wasm-gc/release/build/1/1.core -main moonbitlang/core/1 -o ./target/wasm-gc/release/build/1/1.wasm -pkg-sources moonbitlang/core/1:./1 -target wasm-gc
+            moonc build-package ./0/lib.mbt ./0/y.wasm-gc.mbt -o ./target/wasm-gc/release/build/0/0.core -pkg moonbitlang/core/0 -pkg-sources moonbitlang/core/0:./0 -target wasm-gc
+            moonc link-core ./target/wasm-gc/release/build/0/0.core -main moonbitlang/core/0 -o ./target/wasm-gc/release/build/0/0.wasm -pkg-sources moonbitlang/core/0:./0 -target wasm-gc
+        "#]],
+    );
+    check(
+        &get_stdout_with_args_and_replace_dir(
+            &dir,
+            ["build", "--dry-run", "--target", "js", "--sort-input"],
+        ),
+        expect![[r#"
+            moonc build-package ./1/lib.mbt ./1/x.js.mbt -o ./target/js/release/build/1/1.core -pkg moonbitlang/core/1 -pkg-sources moonbitlang/core/1:./1 -target js
+            moonc build-package ./2/lib.mbt -o ./target/js/release/build/2/2.core -pkg moonbitlang/core/2 -i ./target/js/release/build/1/1.mi:1 -pkg-sources moonbitlang/core/2:./2 -target js
+            moonc link-core ./target/js/release/build/1/1.core ./target/js/release/build/2/2.core -main moonbitlang/core/2 -o ./target/js/release/build/2/2.js -pkg-sources moonbitlang/core/1:./1 -pkg-sources moonbitlang/core/2:./2 -target js
+            moonc link-core ./target/js/release/build/1/1.core -main moonbitlang/core/1 -o ./target/js/release/build/1/1.js -pkg-sources moonbitlang/core/1:./1 -target js
+            moonc build-package ./0/lib.mbt ./0/y.js.mbt -o ./target/js/release/build/0/0.core -pkg moonbitlang/core/0 -pkg-sources moonbitlang/core/0:./0 -target js
+            moonc link-core ./target/js/release/build/0/0.core -main moonbitlang/core/0 -o ./target/js/release/build/0/0.js -pkg-sources moonbitlang/core/0:./0 -target js
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args_and_replace_dir(&dir, ["test", "--dry-run", "--sort-input"]),
+        expect![[r#"
+            moon generate-test-driver --source-dir . --target-dir ./target/wasm-gc/debug/test --sort-input --target wasm-gc
+            moonc build-package -o ./target/wasm-gc/debug/test/coverage/coverage.core -pkg moonbitlang/core/coverage -pkg-sources moonbitlang/core/coverage:./coverage -target wasm-gc -g
+            moonc build-package ./target/wasm-gc/debug/test/iter/__generated_driver_for_internal_test.mbt -o ./target/wasm-gc/debug/test/iter/iter.internal_test.core -pkg moonbitlang/core/iter -is-main -i ./target/wasm-gc/debug/test/coverage/coverage.mi:coverage -pkg-sources moonbitlang/core/iter:./iter -target wasm-gc -g
+            moonc link-core ./target/wasm-gc/debug/test/coverage/coverage.core ./target/wasm-gc/debug/test/iter/iter.internal_test.core -main moonbitlang/core/iter -o ./target/wasm-gc/debug/test/iter/iter.internal_test.wasm -test-mode -pkg-sources moonbitlang/core/coverage:./coverage -pkg-sources moonbitlang/core/iter:./iter -target wasm-gc -g
+            moonc build-package ./target/wasm-gc/debug/test/coverage/__generated_driver_for_internal_test.mbt -o ./target/wasm-gc/debug/test/coverage/coverage.internal_test.core -pkg moonbitlang/core/coverage -is-main -pkg-sources moonbitlang/core/coverage:./coverage -target wasm-gc -g
+            moonc link-core ./target/wasm-gc/debug/test/coverage/coverage.internal_test.core -main moonbitlang/core/coverage -o ./target/wasm-gc/debug/test/coverage/coverage.internal_test.wasm -test-mode -pkg-sources moonbitlang/core/coverage:./coverage -target wasm-gc -g
+            moonc build-package ./target/wasm-gc/debug/test/char/__generated_driver_for_internal_test.mbt -o ./target/wasm-gc/debug/test/char/char.internal_test.core -pkg moonbitlang/core/char -is-main -i ./target/wasm-gc/debug/test/coverage/coverage.mi:coverage -pkg-sources moonbitlang/core/char:./char -target wasm-gc -g
+            moonc link-core ./target/wasm-gc/debug/test/coverage/coverage.core ./target/wasm-gc/debug/test/char/char.internal_test.core -main moonbitlang/core/char -o ./target/wasm-gc/debug/test/char/char.internal_test.wasm -test-mode -pkg-sources moonbitlang/core/coverage:./coverage -pkg-sources moonbitlang/core/char:./char -target wasm-gc -g
+            moonc build-package ./1/lib.mbt ./1/x.wasm-gc.mbt -o ./target/wasm-gc/debug/test/1/1.core -pkg moonbitlang/core/1 -pkg-sources moonbitlang/core/1:./1 -target wasm-gc -g
+            moonc build-package ./2/lib.mbt ./target/wasm-gc/debug/test/2/__generated_driver_for_internal_test.mbt -o ./target/wasm-gc/debug/test/2/2.internal_test.core -pkg moonbitlang/core/2 -is-main -i ./target/wasm-gc/debug/test/1/1.mi:1 -pkg-sources moonbitlang/core/2:./2 -target wasm-gc -g
+            moonc link-core ./target/wasm-gc/debug/test/1/1.core ./target/wasm-gc/debug/test/2/2.internal_test.core -main moonbitlang/core/2 -o ./target/wasm-gc/debug/test/2/2.internal_test.wasm -test-mode -pkg-sources moonbitlang/core/1:./1 -pkg-sources moonbitlang/core/2:./2 -target wasm-gc -g
+            moonc build-package ./1/lib.mbt ./1/x.wasm-gc.mbt ./1/x_wbtest.wasm-gc.mbt ./target/wasm-gc/debug/test/1/__generated_driver_for_underscore_test.mbt -o ./target/wasm-gc/debug/test/1/1.underscore_test.core -pkg moonbitlang/core/1 -is-main -pkg-sources moonbitlang/core/1:./1 -target wasm-gc -g
+            moonc link-core ./target/wasm-gc/debug/test/1/1.underscore_test.core -main moonbitlang/core/1 -o ./target/wasm-gc/debug/test/1/1.underscore_test.wasm -test-mode -pkg-sources moonbitlang/core/1:./1 -target wasm-gc -g
+            moonc build-package ./1/lib.mbt ./1/x.wasm-gc.mbt ./target/wasm-gc/debug/test/1/__generated_driver_for_internal_test.mbt -o ./target/wasm-gc/debug/test/1/1.internal_test.core -pkg moonbitlang/core/1 -is-main -pkg-sources moonbitlang/core/1:./1 -target wasm-gc -g
+            moonc link-core ./target/wasm-gc/debug/test/1/1.internal_test.core -main moonbitlang/core/1 -o ./target/wasm-gc/debug/test/1/1.internal_test.wasm -test-mode -pkg-sources moonbitlang/core/1:./1 -target wasm-gc -g
+            moonc build-package ./0/lib.mbt ./0/y.wasm-gc.mbt ./0/y_wbtest.js.mbt ./0/y_wbtest.mbt ./0/y_wbtest.wasm-gc.mbt ./0/y_wbtest.wasm.mbt ./target/wasm-gc/debug/test/0/__generated_driver_for_underscore_test.mbt -o ./target/wasm-gc/debug/test/0/0.underscore_test.core -pkg moonbitlang/core/0 -is-main -pkg-sources moonbitlang/core/0:./0 -target wasm-gc -g
+            moonc link-core ./target/wasm-gc/debug/test/0/0.underscore_test.core -main moonbitlang/core/0 -o ./target/wasm-gc/debug/test/0/0.underscore_test.wasm -test-mode -pkg-sources moonbitlang/core/0:./0 -target wasm-gc -g
+            moonc build-package ./0/lib.mbt ./0/y.wasm-gc.mbt ./target/wasm-gc/debug/test/0/__generated_driver_for_internal_test.mbt -o ./target/wasm-gc/debug/test/0/0.internal_test.core -pkg moonbitlang/core/0 -is-main -pkg-sources moonbitlang/core/0:./0 -target wasm-gc -g
+            moonc link-core ./target/wasm-gc/debug/test/0/0.internal_test.core -main moonbitlang/core/0 -o ./target/wasm-gc/debug/test/0/0.internal_test.wasm -test-mode -pkg-sources moonbitlang/core/0:./0 -target wasm-gc -g
+        "#]],
+    );
+    check(
+        &get_stdout_with_args_and_replace_dir(
+            &dir,
+            ["test", "--dry-run", "--target", "wasm", "--sort-input"],
+        ),
+        expect![[r#"
+            moon generate-test-driver --source-dir . --target-dir ./target/wasm/debug/test --sort-input --target wasm
+            moonc build-package -o ./target/wasm/debug/test/coverage/coverage.core -pkg moonbitlang/core/coverage -pkg-sources moonbitlang/core/coverage:./coverage -target wasm -g
+            moonc build-package ./target/wasm/debug/test/iter/__generated_driver_for_internal_test.mbt -o ./target/wasm/debug/test/iter/iter.internal_test.core -pkg moonbitlang/core/iter -is-main -i ./target/wasm/debug/test/coverage/coverage.mi:coverage -pkg-sources moonbitlang/core/iter:./iter -target wasm -g
+            moonc link-core ./target/wasm/debug/test/coverage/coverage.core ./target/wasm/debug/test/iter/iter.internal_test.core -main moonbitlang/core/iter -o ./target/wasm/debug/test/iter/iter.internal_test.wasm -test-mode -pkg-sources moonbitlang/core/coverage:./coverage -pkg-sources moonbitlang/core/iter:./iter -target wasm -g
+            moonc build-package ./target/wasm/debug/test/coverage/__generated_driver_for_internal_test.mbt -o ./target/wasm/debug/test/coverage/coverage.internal_test.core -pkg moonbitlang/core/coverage -is-main -pkg-sources moonbitlang/core/coverage:./coverage -target wasm -g
+            moonc link-core ./target/wasm/debug/test/coverage/coverage.internal_test.core -main moonbitlang/core/coverage -o ./target/wasm/debug/test/coverage/coverage.internal_test.wasm -test-mode -pkg-sources moonbitlang/core/coverage:./coverage -target wasm -g
+            moonc build-package ./target/wasm/debug/test/char/__generated_driver_for_internal_test.mbt -o ./target/wasm/debug/test/char/char.internal_test.core -pkg moonbitlang/core/char -is-main -i ./target/wasm/debug/test/coverage/coverage.mi:coverage -pkg-sources moonbitlang/core/char:./char -target wasm -g
+            moonc link-core ./target/wasm/debug/test/coverage/coverage.core ./target/wasm/debug/test/char/char.internal_test.core -main moonbitlang/core/char -o ./target/wasm/debug/test/char/char.internal_test.wasm -test-mode -pkg-sources moonbitlang/core/coverage:./coverage -pkg-sources moonbitlang/core/char:./char -target wasm -g
+            moonc build-package ./1/lib.mbt ./1/x.wasm.mbt -o ./target/wasm/debug/test/1/1.core -pkg moonbitlang/core/1 -pkg-sources moonbitlang/core/1:./1 -target wasm -g
+            moonc build-package ./2/lib.mbt ./target/wasm/debug/test/2/__generated_driver_for_internal_test.mbt -o ./target/wasm/debug/test/2/2.internal_test.core -pkg moonbitlang/core/2 -is-main -i ./target/wasm/debug/test/1/1.mi:1 -pkg-sources moonbitlang/core/2:./2 -target wasm -g
+            moonc link-core ./target/wasm/debug/test/1/1.core ./target/wasm/debug/test/2/2.internal_test.core -main moonbitlang/core/2 -o ./target/wasm/debug/test/2/2.internal_test.wasm -test-mode -pkg-sources moonbitlang/core/1:./1 -pkg-sources moonbitlang/core/2:./2 -target wasm -g
+            moonc build-package ./1/lib.mbt ./1/x.wasm.mbt ./1/x_wbtest.wasm-gc.mbt ./target/wasm/debug/test/1/__generated_driver_for_underscore_test.mbt -o ./target/wasm/debug/test/1/1.underscore_test.core -pkg moonbitlang/core/1 -is-main -pkg-sources moonbitlang/core/1:./1 -target wasm -g
+            moonc link-core ./target/wasm/debug/test/1/1.underscore_test.core -main moonbitlang/core/1 -o ./target/wasm/debug/test/1/1.underscore_test.wasm -test-mode -pkg-sources moonbitlang/core/1:./1 -target wasm -g
+            moonc build-package ./1/lib.mbt ./1/x.wasm.mbt ./target/wasm/debug/test/1/__generated_driver_for_internal_test.mbt -o ./target/wasm/debug/test/1/1.internal_test.core -pkg moonbitlang/core/1 -is-main -pkg-sources moonbitlang/core/1:./1 -target wasm -g
+            moonc link-core ./target/wasm/debug/test/1/1.internal_test.core -main moonbitlang/core/1 -o ./target/wasm/debug/test/1/1.internal_test.wasm -test-mode -pkg-sources moonbitlang/core/1:./1 -target wasm -g
+            moonc build-package ./0/lib.mbt ./0/y.wasm.mbt ./0/y_wbtest.js.mbt ./0/y_wbtest.mbt ./0/y_wbtest.wasm-gc.mbt ./0/y_wbtest.wasm.mbt ./target/wasm/debug/test/0/__generated_driver_for_underscore_test.mbt -o ./target/wasm/debug/test/0/0.underscore_test.core -pkg moonbitlang/core/0 -is-main -pkg-sources moonbitlang/core/0:./0 -target wasm -g
+            moonc link-core ./target/wasm/debug/test/0/0.underscore_test.core -main moonbitlang/core/0 -o ./target/wasm/debug/test/0/0.underscore_test.wasm -test-mode -pkg-sources moonbitlang/core/0:./0 -target wasm -g
+            moonc build-package ./0/lib.mbt ./0/y.wasm.mbt ./target/wasm/debug/test/0/__generated_driver_for_internal_test.mbt -o ./target/wasm/debug/test/0/0.internal_test.core -pkg moonbitlang/core/0 -is-main -pkg-sources moonbitlang/core/0:./0 -target wasm -g
+            moonc link-core ./target/wasm/debug/test/0/0.internal_test.core -main moonbitlang/core/0 -o ./target/wasm/debug/test/0/0.internal_test.wasm -test-mode -pkg-sources moonbitlang/core/0:./0 -target wasm -g
+        "#]],
+    );
+    check(
+        &get_stdout_with_args_and_replace_dir(
+            &dir,
+            ["test", "--dry-run", "--target", "wasm-gc", "--sort-input"],
+        ),
+        expect![[r#"
+            moon generate-test-driver --source-dir . --target-dir ./target/wasm-gc/debug/test --sort-input --target wasm-gc
+            moonc build-package -o ./target/wasm-gc/debug/test/coverage/coverage.core -pkg moonbitlang/core/coverage -pkg-sources moonbitlang/core/coverage:./coverage -target wasm-gc -g
+            moonc build-package ./target/wasm-gc/debug/test/iter/__generated_driver_for_internal_test.mbt -o ./target/wasm-gc/debug/test/iter/iter.internal_test.core -pkg moonbitlang/core/iter -is-main -i ./target/wasm-gc/debug/test/coverage/coverage.mi:coverage -pkg-sources moonbitlang/core/iter:./iter -target wasm-gc -g
+            moonc link-core ./target/wasm-gc/debug/test/coverage/coverage.core ./target/wasm-gc/debug/test/iter/iter.internal_test.core -main moonbitlang/core/iter -o ./target/wasm-gc/debug/test/iter/iter.internal_test.wasm -test-mode -pkg-sources moonbitlang/core/coverage:./coverage -pkg-sources moonbitlang/core/iter:./iter -target wasm-gc -g
+            moonc build-package ./target/wasm-gc/debug/test/coverage/__generated_driver_for_internal_test.mbt -o ./target/wasm-gc/debug/test/coverage/coverage.internal_test.core -pkg moonbitlang/core/coverage -is-main -pkg-sources moonbitlang/core/coverage:./coverage -target wasm-gc -g
+            moonc link-core ./target/wasm-gc/debug/test/coverage/coverage.internal_test.core -main moonbitlang/core/coverage -o ./target/wasm-gc/debug/test/coverage/coverage.internal_test.wasm -test-mode -pkg-sources moonbitlang/core/coverage:./coverage -target wasm-gc -g
+            moonc build-package ./target/wasm-gc/debug/test/char/__generated_driver_for_internal_test.mbt -o ./target/wasm-gc/debug/test/char/char.internal_test.core -pkg moonbitlang/core/char -is-main -i ./target/wasm-gc/debug/test/coverage/coverage.mi:coverage -pkg-sources moonbitlang/core/char:./char -target wasm-gc -g
+            moonc link-core ./target/wasm-gc/debug/test/coverage/coverage.core ./target/wasm-gc/debug/test/char/char.internal_test.core -main moonbitlang/core/char -o ./target/wasm-gc/debug/test/char/char.internal_test.wasm -test-mode -pkg-sources moonbitlang/core/coverage:./coverage -pkg-sources moonbitlang/core/char:./char -target wasm-gc -g
+            moonc build-package ./1/lib.mbt ./1/x.wasm-gc.mbt -o ./target/wasm-gc/debug/test/1/1.core -pkg moonbitlang/core/1 -pkg-sources moonbitlang/core/1:./1 -target wasm-gc -g
+            moonc build-package ./2/lib.mbt ./target/wasm-gc/debug/test/2/__generated_driver_for_internal_test.mbt -o ./target/wasm-gc/debug/test/2/2.internal_test.core -pkg moonbitlang/core/2 -is-main -i ./target/wasm-gc/debug/test/1/1.mi:1 -pkg-sources moonbitlang/core/2:./2 -target wasm-gc -g
+            moonc link-core ./target/wasm-gc/debug/test/1/1.core ./target/wasm-gc/debug/test/2/2.internal_test.core -main moonbitlang/core/2 -o ./target/wasm-gc/debug/test/2/2.internal_test.wasm -test-mode -pkg-sources moonbitlang/core/1:./1 -pkg-sources moonbitlang/core/2:./2 -target wasm-gc -g
+            moonc build-package ./1/lib.mbt ./1/x.wasm-gc.mbt ./1/x_wbtest.wasm-gc.mbt ./target/wasm-gc/debug/test/1/__generated_driver_for_underscore_test.mbt -o ./target/wasm-gc/debug/test/1/1.underscore_test.core -pkg moonbitlang/core/1 -is-main -pkg-sources moonbitlang/core/1:./1 -target wasm-gc -g
+            moonc link-core ./target/wasm-gc/debug/test/1/1.underscore_test.core -main moonbitlang/core/1 -o ./target/wasm-gc/debug/test/1/1.underscore_test.wasm -test-mode -pkg-sources moonbitlang/core/1:./1 -target wasm-gc -g
+            moonc build-package ./1/lib.mbt ./1/x.wasm-gc.mbt ./target/wasm-gc/debug/test/1/__generated_driver_for_internal_test.mbt -o ./target/wasm-gc/debug/test/1/1.internal_test.core -pkg moonbitlang/core/1 -is-main -pkg-sources moonbitlang/core/1:./1 -target wasm-gc -g
+            moonc link-core ./target/wasm-gc/debug/test/1/1.internal_test.core -main moonbitlang/core/1 -o ./target/wasm-gc/debug/test/1/1.internal_test.wasm -test-mode -pkg-sources moonbitlang/core/1:./1 -target wasm-gc -g
+            moonc build-package ./0/lib.mbt ./0/y.wasm-gc.mbt ./0/y_wbtest.js.mbt ./0/y_wbtest.mbt ./0/y_wbtest.wasm-gc.mbt ./0/y_wbtest.wasm.mbt ./target/wasm-gc/debug/test/0/__generated_driver_for_underscore_test.mbt -o ./target/wasm-gc/debug/test/0/0.underscore_test.core -pkg moonbitlang/core/0 -is-main -pkg-sources moonbitlang/core/0:./0 -target wasm-gc -g
+            moonc link-core ./target/wasm-gc/debug/test/0/0.underscore_test.core -main moonbitlang/core/0 -o ./target/wasm-gc/debug/test/0/0.underscore_test.wasm -test-mode -pkg-sources moonbitlang/core/0:./0 -target wasm-gc -g
+            moonc build-package ./0/lib.mbt ./0/y.wasm-gc.mbt ./target/wasm-gc/debug/test/0/__generated_driver_for_internal_test.mbt -o ./target/wasm-gc/debug/test/0/0.internal_test.core -pkg moonbitlang/core/0 -is-main -pkg-sources moonbitlang/core/0:./0 -target wasm-gc -g
+            moonc link-core ./target/wasm-gc/debug/test/0/0.internal_test.core -main moonbitlang/core/0 -o ./target/wasm-gc/debug/test/0/0.internal_test.wasm -test-mode -pkg-sources moonbitlang/core/0:./0 -target wasm-gc -g
+        "#]],
+    );
+    check(
+        &get_stdout_with_args_and_replace_dir(
+            &dir,
+            ["test", "--dry-run", "--target", "js", "--sort-input"],
+        ),
+        expect![[r#"
+            moon generate-test-driver --source-dir . --target-dir ./target/js/debug/test --sort-input --target js
+            moonc build-package -o ./target/js/debug/test/coverage/coverage.core -pkg moonbitlang/core/coverage -pkg-sources moonbitlang/core/coverage:./coverage -target js -g -ryu
+            moonc build-package ./target/js/debug/test/iter/__generated_driver_for_internal_test.mbt -o ./target/js/debug/test/iter/iter.internal_test.core -pkg moonbitlang/core/iter -is-main -i ./target/js/debug/test/coverage/coverage.mi:coverage -pkg-sources moonbitlang/core/iter:./iter -target js -g -ryu
+            moonc link-core ./target/js/debug/test/coverage/coverage.core ./target/js/debug/test/iter/iter.internal_test.core -main moonbitlang/core/iter -o ./target/js/debug/test/iter/iter.internal_test.js -test-mode -pkg-sources moonbitlang/core/coverage:./coverage -pkg-sources moonbitlang/core/iter:./iter -target js -g -ryu
+            moonc build-package ./target/js/debug/test/coverage/__generated_driver_for_internal_test.mbt -o ./target/js/debug/test/coverage/coverage.internal_test.core -pkg moonbitlang/core/coverage -is-main -pkg-sources moonbitlang/core/coverage:./coverage -target js -g -ryu
+            moonc link-core ./target/js/debug/test/coverage/coverage.internal_test.core -main moonbitlang/core/coverage -o ./target/js/debug/test/coverage/coverage.internal_test.js -test-mode -pkg-sources moonbitlang/core/coverage:./coverage -target js -g -ryu
+            moonc build-package ./target/js/debug/test/char/__generated_driver_for_internal_test.mbt -o ./target/js/debug/test/char/char.internal_test.core -pkg moonbitlang/core/char -is-main -i ./target/js/debug/test/coverage/coverage.mi:coverage -pkg-sources moonbitlang/core/char:./char -target js -g -ryu
+            moonc link-core ./target/js/debug/test/coverage/coverage.core ./target/js/debug/test/char/char.internal_test.core -main moonbitlang/core/char -o ./target/js/debug/test/char/char.internal_test.js -test-mode -pkg-sources moonbitlang/core/coverage:./coverage -pkg-sources moonbitlang/core/char:./char -target js -g -ryu
+            moonc build-package ./1/lib.mbt ./1/x.js.mbt -o ./target/js/debug/test/1/1.core -pkg moonbitlang/core/1 -pkg-sources moonbitlang/core/1:./1 -target js -g -ryu
+            moonc build-package ./2/lib.mbt ./target/js/debug/test/2/__generated_driver_for_internal_test.mbt -o ./target/js/debug/test/2/2.internal_test.core -pkg moonbitlang/core/2 -is-main -i ./target/js/debug/test/1/1.mi:1 -pkg-sources moonbitlang/core/2:./2 -target js -g -ryu
+            moonc link-core ./target/js/debug/test/1/1.core ./target/js/debug/test/2/2.internal_test.core -main moonbitlang/core/2 -o ./target/js/debug/test/2/2.internal_test.js -test-mode -pkg-sources moonbitlang/core/1:./1 -pkg-sources moonbitlang/core/2:./2 -target js -g -ryu
+            moonc build-package ./1/lib.mbt ./1/x.js.mbt ./1/x_wbtest.wasm-gc.mbt ./target/js/debug/test/1/__generated_driver_for_underscore_test.mbt -o ./target/js/debug/test/1/1.underscore_test.core -pkg moonbitlang/core/1 -is-main -pkg-sources moonbitlang/core/1:./1 -target js -g -ryu
+            moonc link-core ./target/js/debug/test/1/1.underscore_test.core -main moonbitlang/core/1 -o ./target/js/debug/test/1/1.underscore_test.js -test-mode -pkg-sources moonbitlang/core/1:./1 -target js -g -ryu
+            moonc build-package ./1/lib.mbt ./1/x.js.mbt ./target/js/debug/test/1/__generated_driver_for_internal_test.mbt -o ./target/js/debug/test/1/1.internal_test.core -pkg moonbitlang/core/1 -is-main -pkg-sources moonbitlang/core/1:./1 -target js -g -ryu
+            moonc link-core ./target/js/debug/test/1/1.internal_test.core -main moonbitlang/core/1 -o ./target/js/debug/test/1/1.internal_test.js -test-mode -pkg-sources moonbitlang/core/1:./1 -target js -g -ryu
+            moonc build-package ./0/lib.mbt ./0/y.js.mbt ./0/y_wbtest.js.mbt ./0/y_wbtest.mbt ./0/y_wbtest.wasm-gc.mbt ./0/y_wbtest.wasm.mbt ./target/js/debug/test/0/__generated_driver_for_underscore_test.mbt -o ./target/js/debug/test/0/0.underscore_test.core -pkg moonbitlang/core/0 -is-main -pkg-sources moonbitlang/core/0:./0 -target js -g -ryu
+            moonc link-core ./target/js/debug/test/0/0.underscore_test.core -main moonbitlang/core/0 -o ./target/js/debug/test/0/0.underscore_test.js -test-mode -pkg-sources moonbitlang/core/0:./0 -target js -g -ryu
+            moonc build-package ./0/lib.mbt ./0/y.js.mbt ./target/js/debug/test/0/__generated_driver_for_internal_test.mbt -o ./target/js/debug/test/0/0.internal_test.core -pkg moonbitlang/core/0 -is-main -pkg-sources moonbitlang/core/0:./0 -target js -g -ryu
+            moonc link-core ./target/js/debug/test/0/0.internal_test.core -main moonbitlang/core/0 -o ./target/js/debug/test/0/0.internal_test.js -test-mode -pkg-sources moonbitlang/core/0:./0 -target js -g -ryu
+        "#]],
+    );
+    check(
+        &get_stdout_with_args_and_replace_dir(
+            &dir,
+            ["test", "--dry-run", "--enable-coverage", "--sort-input"],
+        ),
+        expect![[r#"
+            moon generate-test-driver --source-dir . --target-dir ./target/wasm-gc/debug/test --sort-input --target wasm-gc
+            moonc build-package -o ./target/wasm-gc/debug/test/coverage/coverage.core -pkg moonbitlang/core/coverage -pkg-sources moonbitlang/core/coverage:./coverage -target wasm-gc -g -enable-coverage -coverage-package-override=@self
+            moonc build-package ./target/wasm-gc/debug/test/iter/__generated_driver_for_internal_test.mbt -o ./target/wasm-gc/debug/test/iter/iter.internal_test.core -pkg moonbitlang/core/iter -is-main -i ./target/wasm-gc/debug/test/coverage/coverage.mi:coverage -pkg-sources moonbitlang/core/iter:./iter -target wasm-gc -g -enable-coverage
+            moonc link-core ./target/wasm-gc/debug/test/coverage/coverage.core ./target/wasm-gc/debug/test/iter/iter.internal_test.core -main moonbitlang/core/iter -o ./target/wasm-gc/debug/test/iter/iter.internal_test.wasm -test-mode -pkg-sources moonbitlang/core/coverage:./coverage -pkg-sources moonbitlang/core/iter:./iter -target wasm-gc -g
+            moonc build-package ./target/wasm-gc/debug/test/coverage/__generated_driver_for_internal_test.mbt -o ./target/wasm-gc/debug/test/coverage/coverage.internal_test.core -pkg moonbitlang/core/coverage -is-main -pkg-sources moonbitlang/core/coverage:./coverage -target wasm-gc -g -enable-coverage -coverage-package-override=@self
+            moonc link-core ./target/wasm-gc/debug/test/coverage/coverage.internal_test.core -main moonbitlang/core/coverage -o ./target/wasm-gc/debug/test/coverage/coverage.internal_test.wasm -test-mode -pkg-sources moonbitlang/core/coverage:./coverage -target wasm-gc -g
+            moonc build-package ./target/wasm-gc/debug/test/char/__generated_driver_for_internal_test.mbt -o ./target/wasm-gc/debug/test/char/char.internal_test.core -pkg moonbitlang/core/char -is-main -i ./target/wasm-gc/debug/test/coverage/coverage.mi:coverage -pkg-sources moonbitlang/core/char:./char -target wasm-gc -g -enable-coverage
+            moonc link-core ./target/wasm-gc/debug/test/coverage/coverage.core ./target/wasm-gc/debug/test/char/char.internal_test.core -main moonbitlang/core/char -o ./target/wasm-gc/debug/test/char/char.internal_test.wasm -test-mode -pkg-sources moonbitlang/core/coverage:./coverage -pkg-sources moonbitlang/core/char:./char -target wasm-gc -g
+            moonc build-package ./1/lib.mbt ./1/x.wasm-gc.mbt -o ./target/wasm-gc/debug/test/1/1.core -pkg moonbitlang/core/1 -pkg-sources moonbitlang/core/1:./1 -target wasm-gc -g -enable-coverage
+            moonc build-package ./2/lib.mbt ./target/wasm-gc/debug/test/2/__generated_driver_for_internal_test.mbt -o ./target/wasm-gc/debug/test/2/2.internal_test.core -pkg moonbitlang/core/2 -is-main -i ./target/wasm-gc/debug/test/1/1.mi:1 -pkg-sources moonbitlang/core/2:./2 -target wasm-gc -g -enable-coverage
+            moonc link-core ./target/wasm-gc/debug/test/1/1.core ./target/wasm-gc/debug/test/2/2.internal_test.core -main moonbitlang/core/2 -o ./target/wasm-gc/debug/test/2/2.internal_test.wasm -test-mode -pkg-sources moonbitlang/core/1:./1 -pkg-sources moonbitlang/core/2:./2 -target wasm-gc -g
+            moonc build-package ./1/lib.mbt ./1/x.wasm-gc.mbt ./1/x_wbtest.wasm-gc.mbt ./target/wasm-gc/debug/test/1/__generated_driver_for_underscore_test.mbt -o ./target/wasm-gc/debug/test/1/1.underscore_test.core -pkg moonbitlang/core/1 -is-main -pkg-sources moonbitlang/core/1:./1 -target wasm-gc -g -enable-coverage
+            moonc link-core ./target/wasm-gc/debug/test/1/1.underscore_test.core -main moonbitlang/core/1 -o ./target/wasm-gc/debug/test/1/1.underscore_test.wasm -test-mode -pkg-sources moonbitlang/core/1:./1 -target wasm-gc -g
+            moonc build-package ./1/lib.mbt ./1/x.wasm-gc.mbt ./target/wasm-gc/debug/test/1/__generated_driver_for_internal_test.mbt -o ./target/wasm-gc/debug/test/1/1.internal_test.core -pkg moonbitlang/core/1 -is-main -pkg-sources moonbitlang/core/1:./1 -target wasm-gc -g -enable-coverage
+            moonc link-core ./target/wasm-gc/debug/test/1/1.internal_test.core -main moonbitlang/core/1 -o ./target/wasm-gc/debug/test/1/1.internal_test.wasm -test-mode -pkg-sources moonbitlang/core/1:./1 -target wasm-gc -g
+            moonc build-package ./0/lib.mbt ./0/y.wasm-gc.mbt ./0/y_wbtest.js.mbt ./0/y_wbtest.mbt ./0/y_wbtest.wasm-gc.mbt ./0/y_wbtest.wasm.mbt ./target/wasm-gc/debug/test/0/__generated_driver_for_underscore_test.mbt -o ./target/wasm-gc/debug/test/0/0.underscore_test.core -pkg moonbitlang/core/0 -is-main -pkg-sources moonbitlang/core/0:./0 -target wasm-gc -g -enable-coverage
+            moonc link-core ./target/wasm-gc/debug/test/0/0.underscore_test.core -main moonbitlang/core/0 -o ./target/wasm-gc/debug/test/0/0.underscore_test.wasm -test-mode -pkg-sources moonbitlang/core/0:./0 -target wasm-gc -g
+            moonc build-package ./0/lib.mbt ./0/y.wasm-gc.mbt ./target/wasm-gc/debug/test/0/__generated_driver_for_internal_test.mbt -o ./target/wasm-gc/debug/test/0/0.internal_test.core -pkg moonbitlang/core/0 -is-main -pkg-sources moonbitlang/core/0:./0 -target wasm-gc -g -enable-coverage
+            moonc link-core ./target/wasm-gc/debug/test/0/0.internal_test.core -main moonbitlang/core/0 -o ./target/wasm-gc/debug/test/0/0.internal_test.wasm -test-mode -pkg-sources moonbitlang/core/0:./0 -target wasm-gc -g
+        "#]],
+    );
+    check(
+        &get_stdout_with_args_and_replace_dir(&dir, ["bundle", "--dry-run", "--sort-input"]),
+        expect![[r#"
+            moonc build-package ./1/lib.mbt ./1/x.wasm-gc.mbt -o ./target/wasm-gc/release/bundle/1/1.core -pkg moonbitlang/core/1 -pkg-sources moonbitlang/core/1:./1 -target wasm-gc
+            moonc build-package -o ./target/wasm-gc/release/bundle/coverage/coverage.core -pkg moonbitlang/core/coverage -pkg-sources moonbitlang/core/coverage:./coverage -target wasm-gc
+            moonc build-package ./0/lib.mbt ./0/y.wasm-gc.mbt -o ./target/wasm-gc/release/bundle/0/0.core -pkg moonbitlang/core/0 -pkg-sources moonbitlang/core/0:./0 -target wasm-gc
+            moonc build-package ./2/lib.mbt -o ./target/wasm-gc/release/bundle/2/2.core -pkg moonbitlang/core/2 -i ./target/wasm-gc/release/bundle/1/1.mi:1 -pkg-sources moonbitlang/core/2:./2 -target wasm-gc
+            moonc build-package -o ./target/wasm-gc/release/bundle/char/char.core -pkg moonbitlang/core/char -i ./target/wasm-gc/release/bundle/coverage/coverage.mi:coverage -pkg-sources moonbitlang/core/char:./char -target wasm-gc
+            moonc build-package -o ./target/wasm-gc/release/bundle/iter/iter.core -pkg moonbitlang/core/iter -i ./target/wasm-gc/release/bundle/coverage/coverage.mi:coverage -pkg-sources moonbitlang/core/iter:./iter -target wasm-gc
+            moonc bundle-core ./target/wasm-gc/release/bundle/0/0.core ./target/wasm-gc/release/bundle/1/1.core ./target/wasm-gc/release/bundle/2/2.core ./target/wasm-gc/release/bundle/coverage/coverage.core ./target/wasm-gc/release/bundle/char/char.core ./target/wasm-gc/release/bundle/iter/iter.core -o ./target/wasm-gc/release/bundle/core.core
+        "#]],
+    );
+    check(
+        &get_stdout_with_args_and_replace_dir(
+            &dir,
+            ["bundle", "--dry-run", "--target", "wasm", "--sort-input"],
+        ),
+        expect![[r#"
+            moonc build-package ./1/lib.mbt ./1/x.wasm.mbt -o ./target/wasm/release/bundle/1/1.core -pkg moonbitlang/core/1 -pkg-sources moonbitlang/core/1:./1 -target wasm
+            moonc build-package -o ./target/wasm/release/bundle/coverage/coverage.core -pkg moonbitlang/core/coverage -pkg-sources moonbitlang/core/coverage:./coverage -target wasm
+            moonc build-package ./0/lib.mbt ./0/y.wasm.mbt -o ./target/wasm/release/bundle/0/0.core -pkg moonbitlang/core/0 -pkg-sources moonbitlang/core/0:./0 -target wasm
+            moonc build-package ./2/lib.mbt -o ./target/wasm/release/bundle/2/2.core -pkg moonbitlang/core/2 -i ./target/wasm/release/bundle/1/1.mi:1 -pkg-sources moonbitlang/core/2:./2 -target wasm
+            moonc build-package -o ./target/wasm/release/bundle/char/char.core -pkg moonbitlang/core/char -i ./target/wasm/release/bundle/coverage/coverage.mi:coverage -pkg-sources moonbitlang/core/char:./char -target wasm
+            moonc build-package -o ./target/wasm/release/bundle/iter/iter.core -pkg moonbitlang/core/iter -i ./target/wasm/release/bundle/coverage/coverage.mi:coverage -pkg-sources moonbitlang/core/iter:./iter -target wasm
+            moonc bundle-core ./target/wasm/release/bundle/0/0.core ./target/wasm/release/bundle/1/1.core ./target/wasm/release/bundle/2/2.core ./target/wasm/release/bundle/coverage/coverage.core ./target/wasm/release/bundle/char/char.core ./target/wasm/release/bundle/iter/iter.core -o ./target/wasm/release/bundle/core.core
+        "#]],
+    );
+    check(
+        &get_stdout_with_args_and_replace_dir(
+            &dir,
+            ["bundle", "--dry-run", "--target", "wasm-gc", "--sort-input"],
+        ),
+        expect![[r#"
+            moonc build-package ./1/lib.mbt ./1/x.wasm-gc.mbt -o ./target/wasm-gc/release/bundle/1/1.core -pkg moonbitlang/core/1 -pkg-sources moonbitlang/core/1:./1 -target wasm-gc
+            moonc build-package -o ./target/wasm-gc/release/bundle/coverage/coverage.core -pkg moonbitlang/core/coverage -pkg-sources moonbitlang/core/coverage:./coverage -target wasm-gc
+            moonc build-package ./0/lib.mbt ./0/y.wasm-gc.mbt -o ./target/wasm-gc/release/bundle/0/0.core -pkg moonbitlang/core/0 -pkg-sources moonbitlang/core/0:./0 -target wasm-gc
+            moonc build-package ./2/lib.mbt -o ./target/wasm-gc/release/bundle/2/2.core -pkg moonbitlang/core/2 -i ./target/wasm-gc/release/bundle/1/1.mi:1 -pkg-sources moonbitlang/core/2:./2 -target wasm-gc
+            moonc build-package -o ./target/wasm-gc/release/bundle/char/char.core -pkg moonbitlang/core/char -i ./target/wasm-gc/release/bundle/coverage/coverage.mi:coverage -pkg-sources moonbitlang/core/char:./char -target wasm-gc
+            moonc build-package -o ./target/wasm-gc/release/bundle/iter/iter.core -pkg moonbitlang/core/iter -i ./target/wasm-gc/release/bundle/coverage/coverage.mi:coverage -pkg-sources moonbitlang/core/iter:./iter -target wasm-gc
+            moonc bundle-core ./target/wasm-gc/release/bundle/0/0.core ./target/wasm-gc/release/bundle/1/1.core ./target/wasm-gc/release/bundle/2/2.core ./target/wasm-gc/release/bundle/coverage/coverage.core ./target/wasm-gc/release/bundle/char/char.core ./target/wasm-gc/release/bundle/iter/iter.core -o ./target/wasm-gc/release/bundle/core.core
+        "#]],
+    );
+    check(
+        &get_stdout_with_args_and_replace_dir(
+            &dir,
+            ["bundle", "--dry-run", "--target", "js", "--sort-input"],
+        ),
+        expect![[r#"
+            moonc build-package ./1/lib.mbt ./1/x.js.mbt -o ./target/js/release/bundle/1/1.core -pkg moonbitlang/core/1 -pkg-sources moonbitlang/core/1:./1 -target js
+            moonc build-package -o ./target/js/release/bundle/coverage/coverage.core -pkg moonbitlang/core/coverage -pkg-sources moonbitlang/core/coverage:./coverage -target js
+            moonc build-package ./0/lib.mbt ./0/y.js.mbt -o ./target/js/release/bundle/0/0.core -pkg moonbitlang/core/0 -pkg-sources moonbitlang/core/0:./0 -target js
+            moonc build-package ./2/lib.mbt -o ./target/js/release/bundle/2/2.core -pkg moonbitlang/core/2 -i ./target/js/release/bundle/1/1.mi:1 -pkg-sources moonbitlang/core/2:./2 -target js
+            moonc build-package -o ./target/js/release/bundle/char/char.core -pkg moonbitlang/core/char -i ./target/js/release/bundle/coverage/coverage.mi:coverage -pkg-sources moonbitlang/core/char:./char -target js
+            moonc build-package -o ./target/js/release/bundle/iter/iter.core -pkg moonbitlang/core/iter -i ./target/js/release/bundle/coverage/coverage.mi:coverage -pkg-sources moonbitlang/core/iter:./iter -target js
+            moonc bundle-core ./target/js/release/bundle/0/0.core ./target/js/release/bundle/1/1.core ./target/js/release/bundle/2/2.core ./target/js/release/bundle/coverage/coverage.core ./target/js/release/bundle/char/char.core ./target/js/release/bundle/iter/iter.core -o ./target/js/release/bundle/core.core
+        "#]],
+    );
+    check(
+        &get_stdout_with_args_and_replace_dir(
+            &dir,
+            [
+                "bundle",
+                "--target",
+                "all",
+                "--dry-run",
+                "--sort-input",
+                "--serial",
+            ],
+        ),
+        expect![[r#"
+            moonc build-package ./1/lib.mbt ./1/x.wasm.mbt -o ./target/wasm/release/bundle/1/1.core -pkg moonbitlang/core/1 -pkg-sources moonbitlang/core/1:./1 -target wasm
+            moonc build-package -o ./target/wasm/release/bundle/coverage/coverage.core -pkg moonbitlang/core/coverage -pkg-sources moonbitlang/core/coverage:./coverage -target wasm
+            moonc build-package ./0/lib.mbt ./0/y.wasm.mbt -o ./target/wasm/release/bundle/0/0.core -pkg moonbitlang/core/0 -pkg-sources moonbitlang/core/0:./0 -target wasm
+            moonc build-package ./2/lib.mbt -o ./target/wasm/release/bundle/2/2.core -pkg moonbitlang/core/2 -i ./target/wasm/release/bundle/1/1.mi:1 -pkg-sources moonbitlang/core/2:./2 -target wasm
+            moonc build-package -o ./target/wasm/release/bundle/char/char.core -pkg moonbitlang/core/char -i ./target/wasm/release/bundle/coverage/coverage.mi:coverage -pkg-sources moonbitlang/core/char:./char -target wasm
+            moonc build-package -o ./target/wasm/release/bundle/iter/iter.core -pkg moonbitlang/core/iter -i ./target/wasm/release/bundle/coverage/coverage.mi:coverage -pkg-sources moonbitlang/core/iter:./iter -target wasm
+            moonc bundle-core ./target/wasm/release/bundle/0/0.core ./target/wasm/release/bundle/1/1.core ./target/wasm/release/bundle/2/2.core ./target/wasm/release/bundle/coverage/coverage.core ./target/wasm/release/bundle/char/char.core ./target/wasm/release/bundle/iter/iter.core -o ./target/wasm/release/bundle/core.core
+            moonc build-package ./1/lib.mbt ./1/x.wasm-gc.mbt -o ./target/wasm-gc/release/bundle/1/1.core -pkg moonbitlang/core/1 -pkg-sources moonbitlang/core/1:./1 -target wasm-gc
+            moonc build-package -o ./target/wasm-gc/release/bundle/coverage/coverage.core -pkg moonbitlang/core/coverage -pkg-sources moonbitlang/core/coverage:./coverage -target wasm-gc
+            moonc build-package ./0/lib.mbt ./0/y.wasm-gc.mbt -o ./target/wasm-gc/release/bundle/0/0.core -pkg moonbitlang/core/0 -pkg-sources moonbitlang/core/0:./0 -target wasm-gc
+            moonc build-package ./2/lib.mbt -o ./target/wasm-gc/release/bundle/2/2.core -pkg moonbitlang/core/2 -i ./target/wasm-gc/release/bundle/1/1.mi:1 -pkg-sources moonbitlang/core/2:./2 -target wasm-gc
+            moonc build-package -o ./target/wasm-gc/release/bundle/char/char.core -pkg moonbitlang/core/char -i ./target/wasm-gc/release/bundle/coverage/coverage.mi:coverage -pkg-sources moonbitlang/core/char:./char -target wasm-gc
+            moonc build-package -o ./target/wasm-gc/release/bundle/iter/iter.core -pkg moonbitlang/core/iter -i ./target/wasm-gc/release/bundle/coverage/coverage.mi:coverage -pkg-sources moonbitlang/core/iter:./iter -target wasm-gc
+            moonc bundle-core ./target/wasm-gc/release/bundle/0/0.core ./target/wasm-gc/release/bundle/1/1.core ./target/wasm-gc/release/bundle/2/2.core ./target/wasm-gc/release/bundle/coverage/coverage.core ./target/wasm-gc/release/bundle/char/char.core ./target/wasm-gc/release/bundle/iter/iter.core -o ./target/wasm-gc/release/bundle/core.core
+            moonc build-package ./1/lib.mbt ./1/x.js.mbt -o ./target/js/release/bundle/1/1.core -pkg moonbitlang/core/1 -pkg-sources moonbitlang/core/1:./1 -target js
+            moonc build-package -o ./target/js/release/bundle/coverage/coverage.core -pkg moonbitlang/core/coverage -pkg-sources moonbitlang/core/coverage:./coverage -target js
+            moonc build-package ./0/lib.mbt ./0/y.js.mbt -o ./target/js/release/bundle/0/0.core -pkg moonbitlang/core/0 -pkg-sources moonbitlang/core/0:./0 -target js
+            moonc build-package ./2/lib.mbt -o ./target/js/release/bundle/2/2.core -pkg moonbitlang/core/2 -i ./target/js/release/bundle/1/1.mi:1 -pkg-sources moonbitlang/core/2:./2 -target js
+            moonc build-package -o ./target/js/release/bundle/char/char.core -pkg moonbitlang/core/char -i ./target/js/release/bundle/coverage/coverage.mi:coverage -pkg-sources moonbitlang/core/char:./char -target js
+            moonc build-package -o ./target/js/release/bundle/iter/iter.core -pkg moonbitlang/core/iter -i ./target/js/release/bundle/coverage/coverage.mi:coverage -pkg-sources moonbitlang/core/iter:./iter -target js
+            moonc bundle-core ./target/js/release/bundle/0/0.core ./target/js/release/bundle/1/1.core ./target/js/release/bundle/2/2.core ./target/js/release/bundle/coverage/coverage.core ./target/js/release/bundle/char/char.core ./target/js/release/bundle/iter/iter.core -o ./target/js/release/bundle/core.core
+        "#]],
+    );
+}
+
+#[test]
+#[ignore = "not implemented"]
+fn test_backend_flag() {
+    let dir = TestDir::new("backend-flag.in");
+
+    check(
+        &get_stdout_with_args_and_replace_dir(&dir, ["check", "--dry-run", "--sort-input"]),
+        expect![[r#"
+            moonc check ./lib/hello.mbt -o ./target/js/release/check/lib/lib.mi -pkg username/hello/lib -std-path $MOON_HOME/lib/core/target/js/release/bundle -pkg-sources username/hello/lib:./lib
+            moonc check ./main/main.mbt -o ./target/js/release/check/main/main.mi -pkg username/hello/main -is-main -std-path $MOON_HOME/lib/core/target/js/release/bundle -i ./target/js/release/check/lib/lib.mi:lib -pkg-sources username/hello/main:./main
+            moonc check ./lib/hello.mbt ./lib/hello_test.mbt -o ./target/js/release/check/lib/lib.underscore_test.mi -pkg username/hello/lib -std-path $MOON_HOME/lib/core/target/js/release/bundle -pkg-sources username/hello/lib:./lib
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args_and_replace_dir(&dir, ["build", "--dry-run", "--sort-input"]),
+        expect![[r#"
+            moonc build-package ./lib/hello.mbt -o ./target/js/release/build/lib/lib.core -pkg username/hello/lib -std-path $MOON_HOME/lib/core/target/js/release/bundle -pkg-sources username/hello/lib:./lib
+            moonc build-package ./main/main.mbt -o ./target/js/release/build/main/main.core -pkg username/hello/main -is-main -std-path $MOON_HOME/lib/core/target/js/release/bundle -i ./target/js/release/build/lib/lib.mi:lib -pkg-sources username/hello/main:./main
+            moonc link-core $MOON_HOME/lib/core/target/js/release/bundle/core.core ./target/js/release/build/lib/lib.core ./target/js/release/build/main/main.core -main username/hello/main -o ./target/js/release/build/main/main.js -pkg-sources username/hello/lib:./lib -pkg-sources username/hello/main:./main -target js
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args_and_replace_dir(&dir, ["test", "--dry-run", "--sort-input"]),
+        expect![[r#"
+            moon generate-test-driver --source-dir . --target-dir ./target/js/debug/test
+            moonc build-package ./lib/hello.mbt ./lib/hello_test.mbt ./target/js/debug/test/lib/__generated_driver_for_underscore_test.mbt -o ./target/js/debug/test/lib/lib.underscore_test.core -pkg username/hello/lib -is-main -std-path $MOON_HOME/lib/core/target/js/release/bundle -pkg-sources username/hello/lib:./lib -g -ryu
+            moonc link-core $MOON_HOME/lib/core/target/js/release/bundle/core.core ./target/js/debug/test/lib/lib.underscore_test.core -main username/hello/lib -o ./target/js/debug/test/lib/lib.underscore_test.js -test-mode -pkg-sources username/hello/lib:./lib -target js -ryu
+            moonc build-package ./lib/hello.mbt ./target/js/debug/test/lib/__generated_driver_for_internal_test.mbt -o ./target/js/debug/test/lib/lib.internal_test.core -pkg username/hello/lib -is-main -std-path $MOON_HOME/lib/core/target/js/release/bundle -pkg-sources username/hello/lib:./lib -g -ryu
+            moonc link-core $MOON_HOME/lib/core/target/js/release/bundle/core.core ./target/js/debug/test/lib/lib.internal_test.core -main username/hello/lib -o ./target/js/debug/test/lib/lib.internal_test.js -test-mode -pkg-sources username/hello/lib:./lib -target js -ryu
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args_and_replace_dir(&dir, ["bundle", "--dry-run", "--sort-input"]),
+        expect![[r#"
+            moonc build-package ./lib/hello.mbt -o ./target/js/release/bundle/lib/lib.core -pkg username/hello/lib -pkg-sources username/hello/lib:./lib
+            moonc build-package ./main/main.mbt -o ./target/js/release/bundle/main/main.core -pkg username/hello/main -is-main -i ./target/js/release/bundle/lib/lib.mi:lib -pkg-sources username/hello/main:./main
+            moonc bundle-core ./target/js/release/bundle/lib/lib.core ./target/js/release/bundle/main/main.core -o ./target/js/release/bundle/hello.core
+        "#]],
+    );
+}
+
+#[test]
+fn test_source_map() {
+    let dir = TestDir::new("hello.in");
+
+    // no -source-map in wasm backend
+    check(
+        &get_stdout_with_args_and_replace_dir(
+            &dir,
+            [
+                "build",
+                "--target",
+                "wasm",
+                "--debug",
+                "--dry-run",
+                "--sort-input",
+            ],
+        ),
+        expect![[r#"
+            moonc build-package ./main/main.mbt -o ./target/wasm/debug/build/main/main.core -pkg hello/main -is-main -std-path $MOON_HOME/lib/core/target/wasm/release/bundle -pkg-sources hello/main:./main -target wasm -g
+            moonc link-core $MOON_HOME/lib/core/target/wasm/release/bundle/core.core ./target/wasm/debug/build/main/main.core -main hello/main -o ./target/wasm/debug/build/main/main.wasm -pkg-sources hello/main:./main -pkg-sources moonbitlang/core:$MOON_HOME/lib/core -target wasm -g
+        "#]],
+    );
+    check(
+        &get_stdout_with_args_and_replace_dir(
+            &dir,
+            [
+                "build",
+                "--target",
+                "wasm-gc",
+                "--debug",
+                "--dry-run",
+                "--sort-input",
+            ],
+        ),
+        expect![[r#"
+            moonc build-package ./main/main.mbt -o ./target/wasm-gc/debug/build/main/main.core -pkg hello/main -is-main -std-path $MOON_HOME/lib/core/target/wasm-gc/release/bundle -pkg-sources hello/main:./main -target wasm-gc -g -source-map
+            moonc link-core $MOON_HOME/lib/core/target/wasm-gc/release/bundle/core.core ./target/wasm-gc/debug/build/main/main.core -main hello/main -o ./target/wasm-gc/debug/build/main/main.wasm -pkg-sources hello/main:./main -pkg-sources moonbitlang/core:$MOON_HOME/lib/core -target wasm-gc -g -source-map
+        "#]],
+    );
+    check(
+        &get_stdout_with_args_and_replace_dir(
+            &dir,
+            [
+                "build",
+                "--target",
+                "js",
+                "--debug",
+                "--dry-run",
+                "--sort-input",
+            ],
+        ),
+        expect![[r#"
+            moonc build-package ./main/main.mbt -o ./target/js/debug/build/main/main.core -pkg hello/main -is-main -std-path $MOON_HOME/lib/core/target/js/release/bundle -pkg-sources hello/main:./main -target js -g -source-map
+            moonc link-core $MOON_HOME/lib/core/target/js/release/bundle/core.core ./target/js/debug/build/main/main.core -main hello/main -o ./target/js/debug/build/main/main.js -pkg-sources hello/main:./main -pkg-sources moonbitlang/core:$MOON_HOME/lib/core -target js -g -source-map
+        "#]],
+    );
+}
+
+#[test]
+fn test_find_ancestor_with_mod() {
+    let dir = TestDir::new("hello.in");
+
+    check(
+        &get_stdout_with_args_and_replace_dir(&dir, ["run", "main"]),
+        expect![[r#"
+            Hello, world!
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args_and_replace_dir(&dir, ["run", "main"]),
+        expect![[r#"
+            Hello, world!
+        "#]],
+    );
+}
+
+#[test]
+fn test_js_format() {
+    let dir = TestDir::new("js_format.in");
+    check(
+        &get_stdout_with_args_and_replace_dir(
+            &dir,
+            [
+                "build",
+                "--target",
+                "js",
+                "--sort-input",
+                "--dry-run",
+                "--nostd",
+            ],
+        ),
+        expect![[r#"
+            moonc build-package ./lib3/hello.mbt -o ./target/js/release/build/lib3/lib3.core -pkg username/hello/lib3 -pkg-sources username/hello/lib3:./lib3 -target js
+            moonc link-core ./target/js/release/build/lib3/lib3.core -main username/hello/lib3 -o ./target/js/release/build/lib3/lib3.js -pkg-sources username/hello/lib3:./lib3 -target js -exported_functions=hello -js-format iife
+            moonc build-package ./lib2/hello.mbt -o ./target/js/release/build/lib2/lib2.core -pkg username/hello/lib2 -pkg-sources username/hello/lib2:./lib2 -target js
+            moonc link-core ./target/js/release/build/lib2/lib2.core -main username/hello/lib2 -o ./target/js/release/build/lib2/lib2.js -pkg-sources username/hello/lib2:./lib2 -target js -exported_functions=hello -js-format cjs
+            moonc build-package ./lib1/hello.mbt -o ./target/js/release/build/lib1/lib1.core -pkg username/hello/lib1 -pkg-sources username/hello/lib1:./lib1 -target js
+            moonc link-core ./target/js/release/build/lib1/lib1.core -main username/hello/lib1 -o ./target/js/release/build/lib1/lib1.js -pkg-sources username/hello/lib1:./lib1 -target js -exported_functions=hello -js-format esm
+            moonc build-package ./lib0/hello.mbt -o ./target/js/release/build/lib0/lib0.core -pkg username/hello/lib0 -pkg-sources username/hello/lib0:./lib0 -target js
+            moonc link-core ./target/js/release/build/lib0/lib0.core -main username/hello/lib0 -o ./target/js/release/build/lib0/lib0.js -pkg-sources username/hello/lib0:./lib0 -target js -exported_functions=hello -js-format esm
+        "#]],
+    );
+    let _ = get_stdout_with_args_and_replace_dir(&dir, ["build", "--target", "js", "--nostd"]);
+    let t = dir.join("target").join("js").join("release").join("build");
+    check(
+        &std::fs::read_to_string(t.join("lib0").join("lib0.js"))
+            .unwrap()
+            .replace("\r\n", "\n"),
+        expect![[r#"
+            function username$hello$lib0$$hello() {
+              return "Hello, world!";
+            }
+            export { username$hello$lib0$$hello as hello }
+        "#]],
+    );
+    check(
+        &std::fs::read_to_string(t.join("lib1").join("lib1.js"))
+            .unwrap()
+            .replace("\r\n", "\n"),
+        expect![[r#"
+            function username$hello$lib1$$hello() {
+              return "Hello, world!";
+            }
+            export { username$hello$lib1$$hello as hello }
+        "#]],
+    );
+    check(
+        &std::fs::read_to_string(t.join("lib2").join("lib2.js"))
+            .unwrap()
+            .replace("\r\n", "\n"),
+        expect![[r#"
+            function username$hello$lib2$$hello() {
+              return "Hello, world!";
+            }
+            exports.hello = username$hello$lib2$$hello;
+        "#]],
+    );
+    check(
+        &std::fs::read_to_string(t.join("lib3").join("lib3.js"))
+            .unwrap()
+            .replace("\r\n", "\n"),
+        expect![[r#"
+            (() => {
+              function username$hello$lib3$$hello() {
+                return "Hello, world!";
+              }
+              globalThis.hello = username$hello$lib3$$hello;
+            })();
+        "#]],
+    );
+}
+
+#[test]
+fn test_warn_list_dry_run() {
+    let dir = TestDir::new("warn_list.in");
+
+    check(
+        &get_stdout_with_args_and_replace_dir(
+            &dir,
+            ["build", "--sort-input", "--no-render", "--dry-run"],
+        ),
+        expect![[r#"
+            moonc build-package ./lib/hello.mbt -w -2 -o ./target/wasm-gc/release/build/lib/lib.core -pkg username/hello/lib -std-path $MOON_HOME/lib/core/target/wasm-gc/release/bundle -pkg-sources username/hello/lib:./lib -target wasm-gc
+            moonc build-package ./lib1/hello.mbt -w -1 -o ./target/wasm-gc/release/build/lib1/lib1.core -pkg username/hello/lib1 -std-path $MOON_HOME/lib/core/target/wasm-gc/release/bundle -pkg-sources username/hello/lib1:./lib1 -target wasm-gc
+            moonc build-package ./main/main.mbt -w -1-2 -o ./target/wasm-gc/release/build/main/main.core -pkg username/hello/main -is-main -std-path $MOON_HOME/lib/core/target/wasm-gc/release/bundle -i ./target/wasm-gc/release/build/lib/lib.mi:lib -i ./target/wasm-gc/release/build/lib1/lib1.mi:lib1 -pkg-sources username/hello/main:./main -target wasm-gc
+            moonc link-core $MOON_HOME/lib/core/target/wasm-gc/release/bundle/core.core ./target/wasm-gc/release/build/lib/lib.core ./target/wasm-gc/release/build/lib1/lib1.core ./target/wasm-gc/release/build/main/main.core -main username/hello/main -o ./target/wasm-gc/release/build/main/main.wasm -pkg-sources username/hello/lib:./lib -pkg-sources username/hello/lib1:./lib1 -pkg-sources username/hello/main:./main -pkg-sources moonbitlang/core:$MOON_HOME/lib/core -target wasm-gc
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args_and_replace_dir(&dir, ["test", "--sort-input"]),
+        expect![[r#"
+            Total tests: 0, passed: 0, failed: 0.
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args_and_replace_dir(
+            &dir,
+            ["bundle", "--sort-input", "--no-render", "--dry-run"],
+        ),
+        expect![[r#"
+            moonc build-package ./lib/hello.mbt -w -2 -o ./target/wasm-gc/release/bundle/lib/lib.core -pkg username/hello/lib -pkg-sources username/hello/lib:./lib -target wasm-gc
+            moonc build-package ./lib1/hello.mbt -w -1 -o ./target/wasm-gc/release/bundle/lib1/lib1.core -pkg username/hello/lib1 -pkg-sources username/hello/lib1:./lib1 -target wasm-gc
+            moonc build-package ./main/main.mbt -w -1-2 -o ./target/wasm-gc/release/bundle/main/main.core -pkg username/hello/main -is-main -i ./target/wasm-gc/release/bundle/lib/lib.mi:lib -i ./target/wasm-gc/release/bundle/lib1/lib1.mi:lib1 -pkg-sources username/hello/main:./main -target wasm-gc
+            moonc bundle-core ./target/wasm-gc/release/bundle/lib/lib.core ./target/wasm-gc/release/bundle/lib1/lib1.core ./target/wasm-gc/release/bundle/main/main.core -o ./target/wasm-gc/release/bundle/hello.core
+        "#]],
+    );
+
+    // to cover `moon bundle` no work to do
+    get_stdout_with_args_and_replace_dir(&dir, ["bundle", "--sort-input"]);
+
+    check(
+        &get_stdout_with_args_and_replace_dir(
+            &dir,
+            ["check", "--sort-input", "--no-render", "--dry-run"],
+        ),
+        expect![[r#"
+            moonc check ./lib/hello.mbt -w -2 -o ./target/wasm-gc/release/check/lib/lib.mi -pkg username/hello/lib -std-path $MOON_HOME/lib/core/target/wasm-gc/release/bundle -pkg-sources username/hello/lib:./lib -target wasm-gc
+            moonc check ./lib1/hello.mbt -w -1 -o ./target/wasm-gc/release/check/lib1/lib1.mi -pkg username/hello/lib1 -std-path $MOON_HOME/lib/core/target/wasm-gc/release/bundle -pkg-sources username/hello/lib1:./lib1 -target wasm-gc
+            moonc check ./main/main.mbt -w -1-2 -o ./target/wasm-gc/release/check/main/main.mi -pkg username/hello/main -is-main -std-path $MOON_HOME/lib/core/target/wasm-gc/release/bundle -i ./target/wasm-gc/release/check/lib/lib.mi:lib -i ./target/wasm-gc/release/check/lib1/lib1.mi:lib1 -pkg-sources username/hello/main:./main -target wasm-gc
+        "#]],
+    );
+}
+
+#[test]
+fn test_warn_list_real_run() {
+    let dir = TestDir::new("warn_list.in");
+
+    check(
+        &get_stdout_with_args_and_replace_dir(&dir, ["build", "--sort-input", "--no-render"]),
+        expect![[r#"
+            Finished. moon: ran 4 tasks, now up to date
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args_and_replace_dir(&dir, ["test", "--sort-input"]),
+        expect![[r#"
+            Total tests: 0, passed: 0, failed: 0.
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args_and_replace_dir(&dir, ["bundle", "--sort-input", "--no-render"]),
+        expect![[r#"
+            Finished. moon: ran 4 tasks, now up to date
+        "#]],
+    );
+
+    // to cover `moon bundle` no work to do
+    get_stdout_with_args_and_replace_dir(&dir, ["bundle", "--sort-input"]);
+
+    check(
+        &get_stdout_with_args_and_replace_dir(&dir, ["check", "--sort-input", "--no-render"]),
+        expect![[r#"
+            Finished. moon: ran 3 tasks, now up to date
+        "#]],
+    );
+}
+
+#[test]
+fn test_alert_list() {
+    std::env::set_var("NO_COLOR", "1");
+    let dir = TestDir::new("alert_list.in");
+
+    check(
+        &get_stdout_with_args_and_replace_dir(&dir, ["build", "--sort-input"]),
+        expect![[r#"
+            [2000] Warning: Warning (Alert alert_2): alert_2
+               ╭─[$ROOT/main/main.mbt:3:3]
+               │
+             3 │   alert_2();
+               │   ───┬───  
+               │      ╰───── Warning (Alert alert_2): alert_2
+            ───╯
+            Finished. moon: ran 3 tasks, now up to date
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args_and_replace_dir(&dir, ["test", "--sort-input"]),
+        expect![[r#"
+            Total tests: 1, passed: 1, failed: 0.
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args_and_replace_dir(&dir, ["bundle", "--sort-input"]),
+        expect![[r#"
+            [2000] Warning: Warning (Alert alert_2): alert_2
+               ╭─[$ROOT/main/main.mbt:3:3]
+               │
+             3 │   alert_2();
+               │   ───┬───  
+               │      ╰───── Warning (Alert alert_2): alert_2
+            ───╯
+            Finished. moon: ran 3 tasks, now up to date
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args_and_replace_dir(&dir, ["check", "--sort-input"]),
+        expect![[r#"
+            [2000] Warning: Warning (Alert alert_2): alert_2
+               ╭─[$ROOT/main/main.mbt:3:3]
+               │
+             3 │   alert_2();
+               │   ───┬───  
+               │      ╰───── Warning (Alert alert_2): alert_2
+            ───╯
+            Finished. moon: ran 2 tasks, now up to date
+        "#]],
+    );
+}
+
+#[test]
+fn test_no_work_to_do() {
+    let dir = TestDir::new("moon_new.in");
+    let out = get_stdout_with_args_and_replace_dir(&dir, ["check"]);
+    assert!(out.contains("now up to date"));
+
+    let out = get_stdout_with_args_and_replace_dir(&dir, ["check"]);
+    assert!(out.contains("moon: no work to do"));
+
+    let out = get_stdout_with_args_and_replace_dir(&dir, ["build"]);
+    assert!(out.contains("now up to date"));
+    let out = get_stdout_with_args_and_replace_dir(&dir, ["build"]);
+    assert!(out.contains("moon: no work to do"));
+}
+
+#[test]
+fn test_moon_test_release() {
+    let dir = TestDir::new("test_release.in");
+
+    check(
+        &get_stdout_with_args_and_replace_dir(&dir, ["test", "--dry-run", "--sort-input"]),
+        expect![[r#"
+            moon generate-test-driver --source-dir . --target-dir ./target/wasm-gc/debug/test --sort-input --target wasm-gc
+            moonc build-package ./lib/hello.mbt ./lib/hello_wbtest.mbt ./target/wasm-gc/debug/test/lib/__generated_driver_for_underscore_test.mbt -o ./target/wasm-gc/debug/test/lib/lib.underscore_test.core -pkg username/hello/lib -is-main -std-path $MOON_HOME/lib/core/target/wasm-gc/release/bundle -pkg-sources username/hello/lib:./lib -target wasm-gc -g
+            moonc link-core $MOON_HOME/lib/core/target/wasm-gc/release/bundle/core.core ./target/wasm-gc/debug/test/lib/lib.underscore_test.core -main username/hello/lib -o ./target/wasm-gc/debug/test/lib/lib.underscore_test.wasm -test-mode -pkg-sources username/hello/lib:./lib -pkg-sources moonbitlang/core:$MOON_HOME/lib/core -target wasm-gc -g
+            moonc build-package ./lib/hello.mbt ./target/wasm-gc/debug/test/lib/__generated_driver_for_internal_test.mbt -o ./target/wasm-gc/debug/test/lib/lib.internal_test.core -pkg username/hello/lib -is-main -std-path $MOON_HOME/lib/core/target/wasm-gc/release/bundle -pkg-sources username/hello/lib:./lib -target wasm-gc -g
+            moonc link-core $MOON_HOME/lib/core/target/wasm-gc/release/bundle/core.core ./target/wasm-gc/debug/test/lib/lib.internal_test.core -main username/hello/lib -o ./target/wasm-gc/debug/test/lib/lib.internal_test.wasm -test-mode -pkg-sources username/hello/lib:./lib -pkg-sources moonbitlang/core:$MOON_HOME/lib/core -target wasm-gc -g
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args_and_replace_dir(
+            &dir,
+            ["test", "--release", "--dry-run", "--sort-input"],
+        ),
+        expect![[r#"
+            moon generate-test-driver --source-dir . --target-dir ./target/wasm-gc/release/test --sort-input --target wasm-gc
+            moonc build-package ./lib/hello.mbt ./lib/hello_wbtest.mbt ./target/wasm-gc/release/test/lib/__generated_driver_for_underscore_test.mbt -o ./target/wasm-gc/release/test/lib/lib.underscore_test.core -pkg username/hello/lib -is-main -std-path $MOON_HOME/lib/core/target/wasm-gc/release/bundle -pkg-sources username/hello/lib:./lib -target wasm-gc
+            moonc link-core $MOON_HOME/lib/core/target/wasm-gc/release/bundle/core.core ./target/wasm-gc/release/test/lib/lib.underscore_test.core -main username/hello/lib -o ./target/wasm-gc/release/test/lib/lib.underscore_test.wasm -test-mode -pkg-sources username/hello/lib:./lib -pkg-sources moonbitlang/core:$MOON_HOME/lib/core -target wasm-gc
+            moonc build-package ./lib/hello.mbt ./target/wasm-gc/release/test/lib/__generated_driver_for_internal_test.mbt -o ./target/wasm-gc/release/test/lib/lib.internal_test.core -pkg username/hello/lib -is-main -std-path $MOON_HOME/lib/core/target/wasm-gc/release/bundle -pkg-sources username/hello/lib:./lib -target wasm-gc
+            moonc link-core $MOON_HOME/lib/core/target/wasm-gc/release/bundle/core.core ./target/wasm-gc/release/test/lib/lib.internal_test.core -main username/hello/lib -o ./target/wasm-gc/release/test/lib/lib.internal_test.wasm -test-mode -pkg-sources username/hello/lib:./lib -pkg-sources moonbitlang/core:$MOON_HOME/lib/core -target wasm-gc
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args_and_replace_dir(&dir, ["test", "--release", "--sort-input"]),
+        expect![[r#"
+            test A
+            test hello_0
+            test hello_1
+            Total tests: 3, passed: 3, failed: 0.
+        "#]],
+    );
+}
+
+#[test]
+fn test_backtrace() {
+    let dir = TestDir::new("backtrace.in");
+
+    let out = get_stderr_with_args(&dir, ["run", "main"]);
+    assert!(!out.contains("main.foo.fn"));
+    assert!(!out.contains("main.bar.fn"));
+
+    let out = get_stderr_with_args(&dir, ["run", "main", "--debug"]);
+    assert!(out.contains("main.foo.fn"));
+    assert!(out.contains("main.bar.fn"));
+}
+
+#[test]
+fn test_deny_warn() {
+    std::env::set_var("NO_COLOR", "1");
+    let dir = TestDir::new("test_deny_warn.in");
+
+    check(
+        &get_stdout_with_args_and_replace_dir(&dir, ["check", "--sort-input"]),
+        expect![[r#"
+            [2000] Warning: Warning (Alert alert_2): alert_2
+                ╭─[$ROOT/lib/hello.mbt:14:3]
+                │
+             14 │   alert_2();
+                │   ───┬───  
+                │      ╰───── Warning (Alert alert_2): alert_2
+            ────╯
+            [2000] Warning: Warning (Alert alert_1): alert_1
+                ╭─[$ROOT/lib/hello.mbt:13:3]
+                │
+             13 │   alert_1();
+                │   ───┬───  
+                │      ╰───── Warning (Alert alert_1): alert_1
+            ────╯
+            [1002] Warning: Warning: Unused variable 'a'
+               ╭─[$ROOT/lib/hello.mbt:4:7]
+               │
+             4 │   let a = 1;
+               │       ┬  
+               │       ╰── Warning: Unused variable 'a'
+            ───╯
+            [1002] Warning: Warning: Unused variable '中文'
+                ╭─[$ROOT/lib/hello.mbt:11:7]
+                │
+             11 │   let 中文 = 2
+                │       ──┬─  
+                │         ╰─── Warning: Unused variable '中文'
+            ────╯
+            [1002] Warning: Warning: Unused variable '🤣😭🤣😭🤣'
+                ╭─[$ROOT/lib/hello.mbt:12:7]
+                │
+             12 │   let 🤣😭🤣😭🤣 = 2
+                │       ────┬─────  
+                │           ╰─────── Warning: Unused variable '🤣😭🤣😭🤣'
+            ────╯
+            [1002] Warning: Warning: Unused variable 'a'
+               ╭─[$ROOT/main/main.mbt:2:7]
+               │
+             2 │   let a = 0
+               │       ┬  
+               │       ╰── Warning: Unused variable 'a'
+            ───╯
+            Finished. moon: ran 2 tasks, now up to date
+        "#]],
+    );
+
+    let out = snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["check", "--deny-warn", "--sort-input"])
+        .assert()
+        .failure()
+        .get_output()
+        .stdout
+        .to_owned();
+
+    let s = std::str::from_utf8(&out).unwrap().to_string();
+
+    assert!(s.contains(
+        "failed: moonc check -error-format json -w @a -alert @all-raise-throw-unsafe+deprecated"
+    ));
+
+    check(
+        &get_stdout_with_args_and_replace_dir(&dir, ["build", "--sort-input"]),
+        expect![[r#"
+            [2000] Warning: Warning (Alert alert_2): alert_2
+                ╭─[$ROOT/lib/hello.mbt:14:3]
+                │
+             14 │   alert_2();
+                │   ───┬───  
+                │      ╰───── Warning (Alert alert_2): alert_2
+            ────╯
+            [2000] Warning: Warning (Alert alert_1): alert_1
+                ╭─[$ROOT/lib/hello.mbt:13:3]
+                │
+             13 │   alert_1();
+                │   ───┬───  
+                │      ╰───── Warning (Alert alert_1): alert_1
+            ────╯
+            [1002] Warning: Warning: Unused variable 'a'
+               ╭─[$ROOT/lib/hello.mbt:4:7]
+               │
+             4 │   let a = 1;
+               │       ┬  
+               │       ╰── Warning: Unused variable 'a'
+            ───╯
+            [1002] Warning: Warning: Unused variable '中文'
+                ╭─[$ROOT/lib/hello.mbt:11:7]
+                │
+             11 │   let 中文 = 2
+                │       ──┬─  
+                │         ╰─── Warning: Unused variable '中文'
+            ────╯
+            [1002] Warning: Warning: Unused variable '🤣😭🤣😭🤣'
+                ╭─[$ROOT/lib/hello.mbt:12:7]
+                │
+             12 │   let 🤣😭🤣😭🤣 = 2
+                │       ────┬─────  
+                │           ╰─────── Warning: Unused variable '🤣😭🤣😭🤣'
+            ────╯
+            [1002] Warning: Warning: Unused variable 'a'
+               ╭─[$ROOT/main/main.mbt:2:7]
+               │
+             2 │   let a = 0
+               │       ┬  
+               │       ╰── Warning: Unused variable 'a'
+            ───╯
+            Finished. moon: ran 3 tasks, now up to date
+        "#]],
+    );
+
+    let out = snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["build", "--deny-warn", "--sort-input"])
+        .assert()
+        .failure()
+        .get_output()
+        .stdout
+        .to_owned();
+
+    let s = std::str::from_utf8(&out).unwrap().to_string();
+
+    assert!(
+        s.contains("failed: moonc build-package -error-format json -w @a -alert @all-raise-throw-unsafe+deprecated")
+    );
+}
+
+#[test]
+fn test_moon_test_no_entry_warning() {
+    let dir = TestDir::new("moon_test_no_entry_warning.in");
+
+    let out = snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["test"])
+        .assert()
+        .success()
+        .get_output()
+        .stderr
+        .to_owned();
+
+    check(
+        std::str::from_utf8(&out).unwrap(),
+        expect![[r#"
+            Warning: no test entry found
+        "#]],
+    );
+}
+
+#[test]
+fn test_moon_fmt() {
+    fn read(p: &Path) -> String {
+        std::fs::read_to_string(p).unwrap().replace('\r', "")
+    }
+
+    {
+        let dir = TestDir::new("moon_fmt.in");
+        check(
+            &read(&dir.join("lib").join("hello.mbt")),
+            expect![[r#"
+                pub fn hello() -> String { "Hello, world!" }
+            "#]],
+        );
+        check(
+            &read(&dir.join("main").join("main.mbt")),
+            expect![[r#"
+                fn main { println(@lib.hello()) }"#]],
+        );
+        let _ = get_stdout_with_args_and_replace_dir(&dir, ["fmt"]);
+        check(
+            &read(&dir.join("lib").join("hello.mbt")),
+            expect![[r#"
+                pub fn hello() -> String {
+                  "Hello, world!"
+                }
+            "#]],
+        );
+        check(
+            &read(&dir.join("main").join("main.mbt")),
+            expect![[r#"
+                fn main {
+                  println(@lib.hello())
+                }
+            "#]],
+        );
+    }
+
+    {
+        let dir = TestDir::new("moon_fmt.in");
+        let _ = snapbox::cmd::Command::new(moon_bin())
+            .current_dir(&dir)
+            .args(["fmt", "--check"])
+            .assert()
+            .failure()
+            .get_output()
+            .stdout
+            .to_owned();
+        check(
+            &read(&dir.join("lib").join("hello.mbt")),
+            expect![[r#"
+                pub fn hello() -> String { "Hello, world!" }
+            "#]],
+        );
+        check(
+            &read(&dir.join("main").join("main.mbt")),
+            expect![[r#"
+                fn main { println(@lib.hello()) }"#]],
+        );
+        check(
+            &read(
+                &dir.join("target")
+                    .join(TargetBackend::default().to_dir_name())
+                    .join("release")
+                    .join("format")
+                    .join("lib")
+                    .join("hello.mbt"),
+            ),
+            expect![[r#"
+                pub fn hello() -> String {
+                  "Hello, world!"
+                }
+            "#]],
+        );
+        check(
+            &read(
+                &dir.join("target")
+                    .join(TargetBackend::default().to_dir_name())
+                    .join("release")
+                    .join("format")
+                    .join("main")
+                    .join("main.mbt"),
+            ),
+            expect![[r#"
+                fn main {
+                  println(@lib.hello())
+                }
+            "#]],
+        );
+    }
+}
+
+#[test]
+fn test_export_memory_name() {
+    let dir = TestDir::new("export_memory.in");
+    let _ = get_stdout_with_args_and_replace_dir(
+        &dir,
+        ["build", "--target", "wasm-gc", "--output-wat"],
+    );
+    let content = std::fs::read_to_string(
+        dir.join("target")
+            .join("wasm-gc")
+            .join("release")
+            .join("build")
+            .join("main")
+            .join("main.wat"),
+    )
+    .unwrap();
+    assert!(content.contains("awesome_memory"));
+
+    check(
+        &get_stdout_with_args_and_replace_dir(&dir, ["build", "--dry-run", "--sort-input"]),
+        expect![[r#"
+            moonc build-package ./lib/hello.mbt -o ./target/wasm-gc/release/build/lib/lib.core -pkg username/hello/lib -std-path $MOON_HOME/lib/core/target/wasm-gc/release/bundle -pkg-sources username/hello/lib:./lib -target wasm-gc
+            moonc build-package ./main/main.mbt -o ./target/wasm-gc/release/build/main/main.core -pkg username/hello/main -is-main -std-path $MOON_HOME/lib/core/target/wasm-gc/release/bundle -i ./target/wasm-gc/release/build/lib/lib.mi:lib -pkg-sources username/hello/main:./main -target wasm-gc
+            moonc link-core $MOON_HOME/lib/core/target/wasm-gc/release/bundle/core.core ./target/wasm-gc/release/build/lib/lib.core ./target/wasm-gc/release/build/main/main.core -main username/hello/main -o ./target/wasm-gc/release/build/main/main.wasm -pkg-sources username/hello/lib:./lib -pkg-sources username/hello/main:./main -pkg-sources moonbitlang/core:$MOON_HOME/lib/core -target wasm-gc -export-memory-name awesome_memory
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args_and_replace_dir(
+            &dir,
+            ["build", "--dry-run", "--sort-input", "--target", "wasm"],
+        ),
+        expect![[r#"
+            moonc build-package ./lib/hello.mbt -o ./target/wasm/release/build/lib/lib.core -pkg username/hello/lib -std-path $MOON_HOME/lib/core/target/wasm/release/bundle -pkg-sources username/hello/lib:./lib -target wasm
+            moonc build-package ./main/main.mbt -o ./target/wasm/release/build/main/main.core -pkg username/hello/main -is-main -std-path $MOON_HOME/lib/core/target/wasm/release/bundle -i ./target/wasm/release/build/lib/lib.mi:lib -pkg-sources username/hello/main:./main -target wasm
+            moonc link-core $MOON_HOME/lib/core/target/wasm/release/bundle/core.core ./target/wasm/release/build/lib/lib.core ./target/wasm/release/build/main/main.core -main username/hello/main -o ./target/wasm/release/build/main/main.wasm -pkg-sources username/hello/lib:./lib -pkg-sources username/hello/main:./main -pkg-sources moonbitlang/core:$MOON_HOME/lib/core -target wasm -export-memory-name awesome_memory
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args_and_replace_dir(
+            &dir,
+            ["build", "--dry-run", "--sort-input", "--target", "js"],
+        ),
+        expect![[r#"
+            moonc build-package ./lib/hello.mbt -o ./target/js/release/build/lib/lib.core -pkg username/hello/lib -std-path $MOON_HOME/lib/core/target/js/release/bundle -pkg-sources username/hello/lib:./lib -target js
+            moonc build-package ./main/main.mbt -o ./target/js/release/build/main/main.core -pkg username/hello/main -is-main -std-path $MOON_HOME/lib/core/target/js/release/bundle -i ./target/js/release/build/lib/lib.mi:lib -pkg-sources username/hello/main:./main -target js
+            moonc link-core $MOON_HOME/lib/core/target/js/release/bundle/core.core ./target/js/release/build/lib/lib.core ./target/js/release/build/main/main.core -main username/hello/main -o ./target/js/release/build/main/main.js -pkg-sources username/hello/lib:./lib -pkg-sources username/hello/main:./main -pkg-sources moonbitlang/core:$MOON_HOME/lib/core -target js
+        "#]],
+    );
+}
+
+#[test]
+fn test_no_block_params() {
+    let dir = TestDir::new("no_block_params.in");
+    check(
+        &get_stdout_with_args_and_replace_dir(&dir, ["build", "--dry-run", "--sort-input"]),
+        expect![[r#"
+            moonc build-package ./lib/hello.mbt -o ./target/wasm-gc/release/build/lib/lib.core -pkg username/hello/lib -std-path $MOON_HOME/lib/core/target/wasm-gc/release/bundle -pkg-sources username/hello/lib:./lib -target wasm-gc
+            moonc build-package ./main/main.mbt -o ./target/wasm-gc/release/build/main/main.core -pkg username/hello/main -is-main -std-path $MOON_HOME/lib/core/target/wasm-gc/release/bundle -i ./target/wasm-gc/release/build/lib/lib.mi:lib -pkg-sources username/hello/main:./main -target wasm-gc
+            moonc link-core $MOON_HOME/lib/core/target/wasm-gc/release/bundle/core.core ./target/wasm-gc/release/build/lib/lib.core ./target/wasm-gc/release/build/main/main.core -main username/hello/main -o ./target/wasm-gc/release/build/main/main.wasm -pkg-sources username/hello/lib:./lib -pkg-sources username/hello/main:./main -pkg-sources moonbitlang/core:$MOON_HOME/lib/core -target wasm-gc -no-block-params
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args_and_replace_dir(
+            &dir,
+            ["build", "--dry-run", "--sort-input", "--target", "wasm"],
+        ),
+        expect![[r#"
+            moonc build-package ./lib/hello.mbt -o ./target/wasm/release/build/lib/lib.core -pkg username/hello/lib -std-path $MOON_HOME/lib/core/target/wasm/release/bundle -pkg-sources username/hello/lib:./lib -target wasm
+            moonc build-package ./main/main.mbt -o ./target/wasm/release/build/main/main.core -pkg username/hello/main -is-main -std-path $MOON_HOME/lib/core/target/wasm/release/bundle -i ./target/wasm/release/build/lib/lib.mi:lib -pkg-sources username/hello/main:./main -target wasm
+            moonc link-core $MOON_HOME/lib/core/target/wasm/release/bundle/core.core ./target/wasm/release/build/lib/lib.core ./target/wasm/release/build/main/main.core -main username/hello/main -o ./target/wasm/release/build/main/main.wasm -pkg-sources username/hello/lib:./lib -pkg-sources username/hello/main:./main -pkg-sources moonbitlang/core:$MOON_HOME/lib/core -target wasm -no-block-params
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args_and_replace_dir(
+            &dir,
+            ["build", "--dry-run", "--sort-input", "--target", "js"],
+        ),
+        expect![[r#"
+            moonc build-package ./lib/hello.mbt -o ./target/js/release/build/lib/lib.core -pkg username/hello/lib -std-path $MOON_HOME/lib/core/target/js/release/bundle -pkg-sources username/hello/lib:./lib -target js
+            moonc build-package ./main/main.mbt -o ./target/js/release/build/main/main.core -pkg username/hello/main -is-main -std-path $MOON_HOME/lib/core/target/js/release/bundle -i ./target/js/release/build/lib/lib.mi:lib -pkg-sources username/hello/main:./main -target js
+            moonc link-core $MOON_HOME/lib/core/target/js/release/bundle/core.core ./target/js/release/build/lib/lib.core ./target/js/release/build/main/main.core -main username/hello/main -o ./target/js/release/build/main/main.js -pkg-sources username/hello/lib:./lib -pkg-sources username/hello/main:./main -pkg-sources moonbitlang/core:$MOON_HOME/lib/core -target js
+        "#]],
+    );
+}
+
+#[test]
+fn test_panic() {
+    let dir = TestDir::new("panic.in");
+    let data = snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["test"])
+        .assert()
+        .failure()
+        .get_output()
+        .stdout
+        .to_owned();
+    let out = String::from_utf8_lossy(&data).to_string();
+    check(
+        &out,
+        expect![[r#"
+            test username/hello/lib/hello_wbtest.mbt::panic failed: panic is expected
+            Total tests: 2, passed: 1, failed: 1.
+        "#]],
+    );
+}
+
+#[test]
+fn test_validate_import() {
+    let dir = TestDir::new("validate_import.in");
+    check(
+        &get_stderr_with_args_and_replace_dir(&dir, ["check"]),
+        expect![[r#"
+            error: failed to read import path in "$ROOT/main/moon.pkg.json"
+
+            Caused by:
+                No matching module was found for mbt/core/set
+        "#]],
+    );
+    check(
+        &get_stderr_with_args_and_replace_dir(&dir, ["build"]),
+        expect![[r#"
+            error: failed to read import path in "$ROOT/main/moon.pkg.json"
+
+            Caused by:
+                No matching module was found for mbt/core/set
+        "#]],
+    );
+    check(
+        &get_stderr_with_args_and_replace_dir(&dir, ["test"]),
+        expect![[r#"
+            error: failed to read import path in "$ROOT/main/moon.pkg.json"
+
+            Caused by:
+                No matching module was found for mbt/core/set
+        "#]],
+    );
+    check(
+        &get_stderr_with_args_and_replace_dir(&dir, ["bundle"]),
+        expect![[r#"
+            error: failed to read import path in "$ROOT/main/moon.pkg.json"
+
+            Caused by:
+                No matching module was found for mbt/core/set
+        "#]],
+    );
+}
+
+#[test]
+fn test_multi_process() {
+    use std::process::Command;
+    use std::thread;
+
+    let dir = TestDir::new("test_multi_process");
+    let path: PathBuf = dir.as_ref().into();
+
+    let (num_threads, inner_loop) = (16, 10);
+    let mut container = vec![];
+
+    let success = std::sync::Arc::new(std::sync::atomic::AtomicI32::new(0));
+
+    for _ in 0..num_threads {
+        let path = path.clone();
+        let success = success.clone();
+        let work = thread::spawn(move || {
+            for _ in 0..inner_loop {
+                let _ = std::fs::OpenOptions::new()
+                    .append(true)
+                    .open(path.join("lib/hello.mbt"))
+                    .unwrap()
+                    .write(b"\n")
+                    .unwrap();
+
+                let output = Command::new(moon_bin())
+                    .arg("check")
+                    .current_dir(path.clone())
+                    .output()
+                    .expect("Failed to execute command");
+
+                if output.status.success() {
+                    success.fetch_add(1, std::sync::atomic::Ordering::SeqCst);
+                    let out = String::from_utf8(output.stdout).unwrap();
+                    assert!(out.contains("no work to do") || out.contains("now up to date"));
+                } else {
+                    println!("moon output: {:?}", String::from_utf8(output.stdout));
+                    let error_message = String::from_utf8_lossy(&output.stderr);
+                    println!("{}", error_message);
+                }
+            }
+        });
+        container.push(work);
+    }
+
+    for i in container {
+        i.join().unwrap();
+    }
+
+    assert_eq!(
+        success.load(std::sync::atomic::Ordering::SeqCst),
+        num_threads * inner_loop
+    );
+}
+
+#[test]
+fn test_internal_package() {
+    let dir = TestDir::new("internal_package.in");
+    check(
+        &get_stderr_with_args_and_replace_dir(&dir, ["check", "--sort-input"]),
+        expect![[r#"
+            error: $ROOT/lib2/moon.pkg.json: cannot import internal package `username/hello/lib/internal` in `username/hello/lib2`
+            $ROOT/lib2/moon.pkg.json: cannot import internal package `username/hello/lib/internal/b` in `username/hello/lib2`
+            $ROOT/main/moon.pkg.json: cannot import internal package `username/hello/lib/internal` in `username/hello/main`
+        "#]],
+    );
+}
+
+#[test]
+fn mooncakes_io_smoke_test() {
+    let dir = TestDir::new("hello.in");
+    let _ = get_stdout_with_args(&dir, ["update"]);
+    let _ = get_stdout_with_args(&dir, ["add", "lijunchen/hello2@0.1.0"]);
+    check(
+        &std::fs::read_to_string(dir.join("moon.mod.json")).unwrap(),
+        expect![[r#"
+            {
+              "name": "hello",
+              "deps": {
+                "lijunchen/hello2": "0.1.0"
+              }
+            }"#]],
+    );
+    let _ = get_stdout_with_args(&dir, ["remove", "lijunchen/hello2"]);
+    check(
+        &std::fs::read_to_string(dir.join("moon.mod.json")).unwrap(),
+        expect![[r#"
+            {
+              "name": "hello",
+              "deps": {}
+            }"#]],
+    );
+    let _ = get_stdout_with_args(&dir, ["add", "lijunchen/hello2@0.1.0"]);
+    std::fs::write(
+        dir.join("main/main.mbt"),
+        r#"fn main {
+  println(@lib.hello2())
+}
+"#,
+    )
+    .unwrap();
+
+    assert!(dir
+        .join(DEP_PATH)
+        .join("lijunchen")
+        .join("hello")
+        .join(MOON_MOD_JSON)
+        .exists());
+
+    std::fs::remove_dir_all(dir.join(DEP_PATH)).unwrap();
+    let out = get_stdout_with_args(&dir, ["install"]);
+    let mut lines = out.lines().collect::<Vec<_>>();
+    lines.sort();
+    check(
+        &lines.join("\n"),
+        expect![[r#"
+            Using cached lijunchen/hello2@0.1.0
+            Using cached lijunchen/hello@0.1.0"#]],
+    );
+
+    std::fs::write(
+        dir.join("main/moon.pkg.json"),
+        r#"{
+          "is-main": true,
+          "import": [
+            "lijunchen/hello2/lib"
+          ]
+        }
+    "#,
+    )
+    .unwrap();
+
+    check(
+        &get_stdout_with_args(&dir, ["run", "main"]),
+        expect![[r#"
+            Hello, world!Hello, world2!
+        "#]],
+    );
+}
+
+#[test]
+#[ignore = "where to download mooncake?"]
+fn mooncake_cli_smoke_test() {
+    let dir = TestDir::new("hello.in");
+    let out = std::process::Command::new(moon_bin())
+        .env("RUST_BACKTRACE", "0")
+        .current_dir(&dir)
+        .args(["publish"])
+        .output()
+        .unwrap();
+    let s = std::str::from_utf8(&out.stderr).unwrap().to_string();
+    assert!(s.contains("failed to open credentials file"));
+}
+
+#[test]
+fn bench2_test() {
+    let dir = TestDir::new("bench2_test.in");
+    snapbox::cmd::Command::new(snapbox::cmd::cargo_bin("moon"))
+        .current_dir(&dir)
+        .args(["run", "main"])
+        .assert()
+        .success()
+        .stdout_matches("ok[..]");
+}
+
+#[test]
+fn cakenew_test() {
+    let dir = TestDir::new("cakenew_test.in");
+    snapbox::cmd::Command::new(snapbox::cmd::cargo_bin("moon"))
+        .current_dir(&dir)
+        .args(["run", "main"])
+        .assert()
+        .success()
+        .stdout_matches("Hello,[..]");
+}
+
+#[test]
+fn capture_abort_test() {
+    let dir = super::TestDir::new("capture_abort_test.in");
+    snapbox::cmd::Command::new(snapbox::cmd::cargo_bin("moon"))
+        .current_dir(&dir)
+        .args(["run", "main", "--nostd"])
+        .assert()
+        .failure();
+}
+
+#[test]
+fn whitespace_test() {
+    let dir = TestDir::new("whitespace_test.in");
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["clean"])
+        .assert()
+        .success();
+
+    // unstable test
+    // check(
+    //     &get_stdout_with_args(&dir, ["check", "--dry-run", "--nostd"]),
+    //     expect![[r#"
+    //         moonc check './main lib/hello.mbt' './main lib/hello_test.mbt' -o './target/check/main lib/main lib.underscore_test.mi' -pkg 'username/hello/main lib' -pkg-sources 'username/hello/main lib:./main lib'
+    //         moonc check './main lib/hello.mbt' -o './target/check/main lib/main lib.mi' -pkg 'username/hello/main lib' -pkg-sources 'username/hello/main lib:./main lib'
+    //         moonc check './main exe/main.mbt' -o './target/check/main exe/main exe.mi' -pkg 'username/hello/main exe' -is-main -i './target/check/main lib/main lib.mi:lib' -pkg-sources 'username/hello/main exe:./main exe'
+    //     "#]],
+    // );
+
+    check(
+        &get_stdout_with_args(&dir, ["build", "--dry-run", "--nostd"]),
+        expect![[r#"
+            moonc build-package "./main lib/hello.mbt" -o "./target/wasm-gc/release/build/main lib/main lib.core" -pkg "username/hello/main lib" -pkg-sources "username/hello/main lib:./main lib" -target wasm-gc
+            moonc build-package "./main exe/main.mbt" -o "./target/wasm-gc/release/build/main exe/main exe.core" -pkg "username/hello/main exe" -is-main -i "./target/wasm-gc/release/build/main lib/main lib.mi:lib" -pkg-sources "username/hello/main exe:./main exe" -target wasm-gc
+            moonc link-core "./target/wasm-gc/release/build/main lib/main lib.core" "./target/wasm-gc/release/build/main exe/main exe.core" -main "username/hello/main exe" -o "./target/wasm-gc/release/build/main exe/main exe.wasm" -pkg-sources "username/hello/main lib:./main lib" -pkg-sources "username/hello/main exe:./main exe" -target wasm-gc
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args(&dir, ["build", "--dry-run", "--debug", "--nostd"]),
+        expect![[r#"
+            moonc build-package "./main lib/hello.mbt" -o "./target/wasm-gc/debug/build/main lib/main lib.core" -pkg "username/hello/main lib" -pkg-sources "username/hello/main lib:./main lib" -target wasm-gc -g -source-map
+            moonc build-package "./main exe/main.mbt" -o "./target/wasm-gc/debug/build/main exe/main exe.core" -pkg "username/hello/main exe" -is-main -i "./target/wasm-gc/debug/build/main lib/main lib.mi:lib" -pkg-sources "username/hello/main exe:./main exe" -target wasm-gc -g -source-map
+            moonc link-core "./target/wasm-gc/debug/build/main lib/main lib.core" "./target/wasm-gc/debug/build/main exe/main exe.core" -main "username/hello/main exe" -o "./target/wasm-gc/debug/build/main exe/main exe.wasm" -pkg-sources "username/hello/main lib:./main lib" -pkg-sources "username/hello/main exe:./main exe" -target wasm-gc -g -source-map
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args(&dir, ["run", "main exe", "--dry-run", "--nostd"]),
+        expect![[r#"
+            moonc build-package "./main lib/hello.mbt" -o "./target/wasm-gc/release/build/main lib/main lib.core" -pkg "username/hello/main lib" -pkg-sources "username/hello/main lib:./main lib" -target wasm-gc
+            moonc build-package "./main exe/main.mbt" -o "./target/wasm-gc/release/build/main exe/main exe.core" -pkg "username/hello/main exe" -is-main -i "./target/wasm-gc/release/build/main lib/main lib.mi:lib" -pkg-sources "username/hello/main exe:./main exe" -target wasm-gc
+            moonc link-core "./target/wasm-gc/release/build/main lib/main lib.core" "./target/wasm-gc/release/build/main exe/main exe.core" -main "username/hello/main exe" -o "./target/wasm-gc/release/build/main exe/main exe.wasm" -pkg-sources "username/hello/main lib:./main lib" -pkg-sources "username/hello/main exe:./main exe" -target wasm-gc
+            moonrun ./target/wasm-gc/release/build/main exe/main exe.wasm
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args(&dir, ["run", "main exe", "--dry-run", "--debug", "--nostd"]),
+        expect![[r#"
+            moonc build-package "./main lib/hello.mbt" -o "./target/wasm-gc/debug/build/main lib/main lib.core" -pkg "username/hello/main lib" -pkg-sources "username/hello/main lib:./main lib" -target wasm-gc -g -source-map
+            moonc build-package "./main exe/main.mbt" -o "./target/wasm-gc/debug/build/main exe/main exe.core" -pkg "username/hello/main exe" -is-main -i "./target/wasm-gc/debug/build/main lib/main lib.mi:lib" -pkg-sources "username/hello/main exe:./main exe" -target wasm-gc -g -source-map
+            moonc link-core "./target/wasm-gc/debug/build/main lib/main lib.core" "./target/wasm-gc/debug/build/main exe/main exe.core" -main "username/hello/main exe" -o "./target/wasm-gc/debug/build/main exe/main exe.wasm" -pkg-sources "username/hello/main lib:./main lib" -pkg-sources "username/hello/main exe:./main exe" -target wasm-gc -g -source-map
+            moonrun ./target/wasm-gc/debug/build/main exe/main exe.wasm
+        "#]],
+    );
+    check(
+        &get_stdout_with_args(
+            &dir,
+            ["build", "--target", "wasm-gc", "--dry-run", "--nostd"],
+        ),
+        expect![[r#"
+            moonc build-package "./main lib/hello.mbt" -o "./target/wasm-gc/release/build/main lib/main lib.core" -pkg "username/hello/main lib" -pkg-sources "username/hello/main lib:./main lib" -target wasm-gc
+            moonc build-package "./main exe/main.mbt" -o "./target/wasm-gc/release/build/main exe/main exe.core" -pkg "username/hello/main exe" -is-main -i "./target/wasm-gc/release/build/main lib/main lib.mi:lib" -pkg-sources "username/hello/main exe:./main exe" -target wasm-gc
+            moonc link-core "./target/wasm-gc/release/build/main lib/main lib.core" "./target/wasm-gc/release/build/main exe/main exe.core" -main "username/hello/main exe" -o "./target/wasm-gc/release/build/main exe/main exe.wasm" -pkg-sources "username/hello/main lib:./main lib" -pkg-sources "username/hello/main exe:./main exe" -target wasm-gc
+        "#]],
+    );
+    check(
+        &get_stdout_with_args(
+            &dir,
+            [
+                "build",
+                "--dry-run",
+                "--target",
+                "wasm-gc",
+                "--debug",
+                "--nostd",
+            ],
+        ),
+        expect![[r#"
+            moonc build-package "./main lib/hello.mbt" -o "./target/wasm-gc/debug/build/main lib/main lib.core" -pkg "username/hello/main lib" -pkg-sources "username/hello/main lib:./main lib" -target wasm-gc -g -source-map
+            moonc build-package "./main exe/main.mbt" -o "./target/wasm-gc/debug/build/main exe/main exe.core" -pkg "username/hello/main exe" -is-main -i "./target/wasm-gc/debug/build/main lib/main lib.mi:lib" -pkg-sources "username/hello/main exe:./main exe" -target wasm-gc -g -source-map
+            moonc link-core "./target/wasm-gc/debug/build/main lib/main lib.core" "./target/wasm-gc/debug/build/main exe/main exe.core" -main "username/hello/main exe" -o "./target/wasm-gc/debug/build/main exe/main exe.wasm" -pkg-sources "username/hello/main lib:./main lib" -pkg-sources "username/hello/main exe:./main exe" -target wasm-gc -g -source-map
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args(
+            &dir,
+            [
+                "run",
+                "main exe",
+                "--target",
+                "wasm-gc",
+                "--dry-run",
+                "--nostd",
+            ],
+        ),
+        expect![[r#"
+            moonc build-package "./main lib/hello.mbt" -o "./target/wasm-gc/release/build/main lib/main lib.core" -pkg "username/hello/main lib" -pkg-sources "username/hello/main lib:./main lib" -target wasm-gc
+            moonc build-package "./main exe/main.mbt" -o "./target/wasm-gc/release/build/main exe/main exe.core" -pkg "username/hello/main exe" -is-main -i "./target/wasm-gc/release/build/main lib/main lib.mi:lib" -pkg-sources "username/hello/main exe:./main exe" -target wasm-gc
+            moonc link-core "./target/wasm-gc/release/build/main lib/main lib.core" "./target/wasm-gc/release/build/main exe/main exe.core" -main "username/hello/main exe" -o "./target/wasm-gc/release/build/main exe/main exe.wasm" -pkg-sources "username/hello/main lib:./main lib" -pkg-sources "username/hello/main exe:./main exe" -target wasm-gc
+            moonrun ./target/wasm-gc/release/build/main exe/main exe.wasm
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args(
+            &dir,
+            [
+                "run",
+                "main exe",
+                "--target",
+                "wasm-gc",
+                "--dry-run",
+                "--debug",
+                "--nostd",
+            ],
+        ),
+        expect![[r#"
+            moonc build-package "./main lib/hello.mbt" -o "./target/wasm-gc/debug/build/main lib/main lib.core" -pkg "username/hello/main lib" -pkg-sources "username/hello/main lib:./main lib" -target wasm-gc -g -source-map
+            moonc build-package "./main exe/main.mbt" -o "./target/wasm-gc/debug/build/main exe/main exe.core" -pkg "username/hello/main exe" -is-main -i "./target/wasm-gc/debug/build/main lib/main lib.mi:lib" -pkg-sources "username/hello/main exe:./main exe" -target wasm-gc -g -source-map
+            moonc link-core "./target/wasm-gc/debug/build/main lib/main lib.core" "./target/wasm-gc/debug/build/main exe/main exe.core" -main "username/hello/main exe" -o "./target/wasm-gc/debug/build/main exe/main exe.wasm" -pkg-sources "username/hello/main lib:./main lib" -pkg-sources "username/hello/main exe:./main exe" -target wasm-gc -g -source-map
+            moonrun ./target/wasm-gc/debug/build/main exe/main exe.wasm
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args(&dir, ["run", "main exe"]),
+        expect![[r#"
+            Hello, world!
+        "#]],
+    );
+
+    let out = get_stdout_with_args(&dir, ["check"]);
+    assert!(out.contains("moon: ran 3 tasks, now up to date"));
+}
+
+#[test]
+fn test_whitespace_parent_space() -> anyhow::Result<()> {
+    let tmp_dir = tempfile::TempDir::new()?;
+    let path_with_space = tmp_dir.path().join("with space");
+    std::fs::create_dir_all(&path_with_space)?;
+    let dir = PathBuf::from(env!("CARGO_MANIFEST_DIR"))
+        .join("tests/test_cases")
+        .join("whitespace_test.in");
+    copy(&dir, &path_with_space)?;
+
+    let canon = dunce::canonicalize(tmp_dir.path())?;
+    let prefix = canon.as_path().display().to_string().replace('\\', "/");
+
+    let out = get_stdout_with_args(
+        &path_with_space,
+        ["build", "--no-render", "--sort-input", "--dry-run"],
+    );
+    let out = out.replace(&prefix, ".");
+    let out = out.replace(
+        &moonutil::moon_dir::home()
+            .to_str()
+            .unwrap()
+            .replace('\\', "/"),
+        "$MOON_HOME",
+    );
+
+    copy(&dir, &path_with_space)?;
+    check(
+        &out,
+        expect![[r#"
+            moonc build-package "./main lib/hello.mbt" -o "./target/wasm-gc/release/build/main lib/main lib.core" -pkg "username/hello/main lib" -std-path $MOON_HOME/lib/core/target/wasm-gc/release/bundle -pkg-sources "username/hello/main lib:./main lib" -target wasm-gc
+            moonc build-package "./main exe/main.mbt" -o "./target/wasm-gc/release/build/main exe/main exe.core" -pkg "username/hello/main exe" -is-main -std-path $MOON_HOME/lib/core/target/wasm-gc/release/bundle -i "./target/wasm-gc/release/build/main lib/main lib.mi:lib" -pkg-sources "username/hello/main exe:./main exe" -target wasm-gc
+            moonc link-core $MOON_HOME/lib/core/target/wasm-gc/release/bundle/core.core "./target/wasm-gc/release/build/main lib/main lib.core" "./target/wasm-gc/release/build/main exe/main exe.core" -main "username/hello/main exe" -o "./target/wasm-gc/release/build/main exe/main exe.wasm" -pkg-sources "username/hello/main lib:./main lib" -pkg-sources "username/hello/main exe:./main exe" -pkg-sources moonbitlang/core:$MOON_HOME/lib/core -target wasm-gc
+        "#]],
+    );
+
+    let out = get_stdout_with_args(&path_with_space, ["build", "--no-render"]);
+    let out = out.replace(&prefix, ".");
+    let out = out.replace(
+        &moonutil::moon_dir::home()
+            .to_str()
+            .unwrap()
+            .replace('\\', "/"),
+        "$MOON_HOME",
+    );
+
+    copy(&dir, &path_with_space)?;
+    check(
+        &out,
+        expect![[r#"
+            Finished. moon: ran 3 tasks, now up to date
+        "#]],
+    );
+    Ok(())
+}
+
+#[test]
+fn circle_pkg_test() {
+    let dir = TestDir::new("circle_pkg_AB_001_test.in");
+    let stderr = get_stderr_with_args(&dir, ["run", "main", "--nostd"]);
+    assert!(stderr.contains("cyclic dependency"), "stderr: {}", stderr);
+}
+
+#[test]
+fn debug_flag_test() {
+    let dir = TestDir::new("debug_flag_test.in");
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["clean"])
+        .assert()
+        .success();
+
+    check(
+        &get_stdout_with_args(&dir, ["check", "--dry-run", "--nostd"]),
+        expect![[r#"
+            moonc check ./lib/hello.mbt -o ./target/wasm-gc/release/check/lib/lib.mi -pkg hello/lib -pkg-sources hello/lib:./lib -target wasm-gc
+            moonc check ./main/main.mbt -o ./target/wasm-gc/release/check/main/main.mi -pkg hello/main -is-main -i ./target/wasm-gc/release/check/lib/lib.mi:lib -pkg-sources hello/main:./main -target wasm-gc
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args(&dir, ["build", "--dry-run", "--nostd"]),
+        expect![[r#"
+            moonc build-package ./lib/hello.mbt -o ./target/wasm-gc/release/build/lib/lib.core -pkg hello/lib -pkg-sources hello/lib:./lib -target wasm-gc
+            moonc build-package ./main/main.mbt -o ./target/wasm-gc/release/build/main/main.core -pkg hello/main -is-main -i ./target/wasm-gc/release/build/lib/lib.mi:lib -pkg-sources hello/main:./main -target wasm-gc
+            moonc link-core ./target/wasm-gc/release/build/lib/lib.core ./target/wasm-gc/release/build/main/main.core -main hello/main -o ./target/wasm-gc/release/build/main/main.wasm -pkg-sources hello/lib:./lib -pkg-sources hello/main:./main -target wasm-gc
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args(&dir, ["build", "--dry-run", "--debug", "--nostd"]),
+        expect![[r#"
+            moonc build-package ./lib/hello.mbt -o ./target/wasm-gc/debug/build/lib/lib.core -pkg hello/lib -pkg-sources hello/lib:./lib -target wasm-gc -g -source-map
+            moonc build-package ./main/main.mbt -o ./target/wasm-gc/debug/build/main/main.core -pkg hello/main -is-main -i ./target/wasm-gc/debug/build/lib/lib.mi:lib -pkg-sources hello/main:./main -target wasm-gc -g -source-map
+            moonc link-core ./target/wasm-gc/debug/build/lib/lib.core ./target/wasm-gc/debug/build/main/main.core -main hello/main -o ./target/wasm-gc/debug/build/main/main.wasm -pkg-sources hello/lib:./lib -pkg-sources hello/main:./main -target wasm-gc -g -source-map
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args(&dir, ["run", "main", "--dry-run", "--nostd"]),
+        expect![[r#"
+            moonc build-package ./lib/hello.mbt -o ./target/wasm-gc/release/build/lib/lib.core -pkg hello/lib -pkg-sources hello/lib:./lib -target wasm-gc
+            moonc build-package ./main/main.mbt -o ./target/wasm-gc/release/build/main/main.core -pkg hello/main -is-main -i ./target/wasm-gc/release/build/lib/lib.mi:lib -pkg-sources hello/main:./main -target wasm-gc
+            moonc link-core ./target/wasm-gc/release/build/lib/lib.core ./target/wasm-gc/release/build/main/main.core -main hello/main -o ./target/wasm-gc/release/build/main/main.wasm -pkg-sources hello/lib:./lib -pkg-sources hello/main:./main -target wasm-gc
+            moonrun ./target/wasm-gc/release/build/main/main.wasm
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args(&dir, ["run", "main", "--dry-run", "--debug", "--nostd"]),
+        expect![[r#"
+            moonc build-package ./lib/hello.mbt -o ./target/wasm-gc/debug/build/lib/lib.core -pkg hello/lib -pkg-sources hello/lib:./lib -target wasm-gc -g -source-map
+            moonc build-package ./main/main.mbt -o ./target/wasm-gc/debug/build/main/main.core -pkg hello/main -is-main -i ./target/wasm-gc/debug/build/lib/lib.mi:lib -pkg-sources hello/main:./main -target wasm-gc -g -source-map
+            moonc link-core ./target/wasm-gc/debug/build/lib/lib.core ./target/wasm-gc/debug/build/main/main.core -main hello/main -o ./target/wasm-gc/debug/build/main/main.wasm -pkg-sources hello/lib:./lib -pkg-sources hello/main:./main -target wasm-gc -g -source-map
+            moonrun ./target/wasm-gc/debug/build/main/main.wasm
+        "#]],
+    );
+    check(
+        &get_stdout_with_args(
+            &dir,
+            ["build", "--target", "wasm-gc", "--dry-run", "--nostd"],
+        ),
+        expect![[r#"
+            moonc build-package ./lib/hello.mbt -o ./target/wasm-gc/release/build/lib/lib.core -pkg hello/lib -pkg-sources hello/lib:./lib -target wasm-gc
+            moonc build-package ./main/main.mbt -o ./target/wasm-gc/release/build/main/main.core -pkg hello/main -is-main -i ./target/wasm-gc/release/build/lib/lib.mi:lib -pkg-sources hello/main:./main -target wasm-gc
+            moonc link-core ./target/wasm-gc/release/build/lib/lib.core ./target/wasm-gc/release/build/main/main.core -main hello/main -o ./target/wasm-gc/release/build/main/main.wasm -pkg-sources hello/lib:./lib -pkg-sources hello/main:./main -target wasm-gc
+        "#]],
+    );
+    check(
+        &get_stdout_with_args(
+            &dir,
+            [
+                "build",
+                "--dry-run",
+                "--target",
+                "wasm-gc",
+                "--debug",
+                "--nostd",
+            ],
+        ),
+        expect![[r#"
+            moonc build-package ./lib/hello.mbt -o ./target/wasm-gc/debug/build/lib/lib.core -pkg hello/lib -pkg-sources hello/lib:./lib -target wasm-gc -g -source-map
+            moonc build-package ./main/main.mbt -o ./target/wasm-gc/debug/build/main/main.core -pkg hello/main -is-main -i ./target/wasm-gc/debug/build/lib/lib.mi:lib -pkg-sources hello/main:./main -target wasm-gc -g -source-map
+            moonc link-core ./target/wasm-gc/debug/build/lib/lib.core ./target/wasm-gc/debug/build/main/main.core -main hello/main -o ./target/wasm-gc/debug/build/main/main.wasm -pkg-sources hello/lib:./lib -pkg-sources hello/main:./main -target wasm-gc -g -source-map
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args(
+            &dir,
+            ["run", "main", "--target", "wasm-gc", "--dry-run", "--nostd"],
+        ),
+        expect![[r#"
+            moonc build-package ./lib/hello.mbt -o ./target/wasm-gc/release/build/lib/lib.core -pkg hello/lib -pkg-sources hello/lib:./lib -target wasm-gc
+            moonc build-package ./main/main.mbt -o ./target/wasm-gc/release/build/main/main.core -pkg hello/main -is-main -i ./target/wasm-gc/release/build/lib/lib.mi:lib -pkg-sources hello/main:./main -target wasm-gc
+            moonc link-core ./target/wasm-gc/release/build/lib/lib.core ./target/wasm-gc/release/build/main/main.core -main hello/main -o ./target/wasm-gc/release/build/main/main.wasm -pkg-sources hello/lib:./lib -pkg-sources hello/main:./main -target wasm-gc
+            moonrun ./target/wasm-gc/release/build/main/main.wasm
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args(
+            &dir,
+            [
+                "run",
+                "main",
+                "--target",
+                "wasm-gc",
+                "--dry-run",
+                "--debug",
+                "--nostd",
+            ],
+        ),
+        expect![[r#"
+            moonc build-package ./lib/hello.mbt -o ./target/wasm-gc/debug/build/lib/lib.core -pkg hello/lib -pkg-sources hello/lib:./lib -target wasm-gc -g -source-map
+            moonc build-package ./main/main.mbt -o ./target/wasm-gc/debug/build/main/main.core -pkg hello/main -is-main -i ./target/wasm-gc/debug/build/lib/lib.mi:lib -pkg-sources hello/main:./main -target wasm-gc -g -source-map
+            moonc link-core ./target/wasm-gc/debug/build/lib/lib.core ./target/wasm-gc/debug/build/main/main.core -main hello/main -o ./target/wasm-gc/debug/build/main/main.wasm -pkg-sources hello/lib:./lib -pkg-sources hello/main:./main -target wasm-gc -g -source-map
+            moonrun ./target/wasm-gc/debug/build/main/main.wasm
+        "#]],
+    );
+}
+
+#[test]
+fn test_check_failed_should_write_pkg_json() {
+    let dir = TestDir::new("check_failed_should_write_pkg_json.in");
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["check"])
+        .assert()
+        .failure();
+
+    let pkg_json = dir.join("target/wasm-gc/release/check/packages.json");
+    assert!(pkg_json.exists());
+}
+
+#[test]
+fn test_render_no_location() {
+    std::env::set_var("NO_COLOR", "1");
+    let dir = TestDir::new("render_no_location.in");
+
+    let output = snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .arg("check")
+        .assert()
+        .failure()
+        .get_output()
+        .stdout
+        .to_owned();
+
+    let output = String::from_utf8_lossy(&output);
+    assert!(output.contains("[4067] Error: Missing main function in the main package."));
+}
+
+#[test]
+fn test_moon_run_with_cli_args() {
+    let dir = TestDir::new("moo_run_with_cli_args.in");
+
+    check(
+        &get_stdout_with_args_and_replace_dir(&dir, ["run", "main", "--dry-run"]),
+        expect![[r#"
+            moonc build-package ./main/main.mbt -o ./target/wasm-gc/release/build/main/main.core -pkg username/hello/main -is-main -std-path $MOON_HOME/lib/core/target/wasm-gc/release/bundle -pkg-sources username/hello/main:./main -target wasm-gc
+            moonc link-core $MOON_HOME/lib/core/target/wasm-gc/release/bundle/core.core ./target/wasm-gc/release/build/main/main.core -main username/hello/main -o ./target/wasm-gc/release/build/main/main.wasm -pkg-sources username/hello/main:./main -pkg-sources moonbitlang/core:$MOON_HOME/lib/core -target wasm-gc
+            moonrun ./target/wasm-gc/release/build/main/main.wasm
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args_and_replace_dir(
+            &dir,
+            [
+                "run",
+                "main",
+                "--dry-run",
+                "--",
+                "中文",
+                "😄👍",
+                "hello",
+                "1242",
+            ],
+        ),
+        expect![[r#"
+            moonc build-package ./main/main.mbt -o ./target/wasm-gc/release/build/main/main.core -pkg username/hello/main -is-main -std-path $MOON_HOME/lib/core/target/wasm-gc/release/bundle -pkg-sources username/hello/main:./main -target wasm-gc
+            moonc link-core $MOON_HOME/lib/core/target/wasm-gc/release/bundle/core.core ./target/wasm-gc/release/build/main/main.core -main username/hello/main -o ./target/wasm-gc/release/build/main/main.wasm -pkg-sources username/hello/main:./main -pkg-sources moonbitlang/core:$MOON_HOME/lib/core -target wasm-gc
+            moonrun ./target/wasm-gc/release/build/main/main.wasm -- 中文 😄👍 hello 1242
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args_and_replace_dir(
+            &dir,
+            ["run", "main", "--", "中文", "😄👍", "hello", "1242"],
+        ),
+        expect![[r#"
+            ["中文", "😄👍", "hello", "1242"]
+        "#]],
+    );
+}
+
+#[test]
+fn test_third_party() {
+    if std::env::var("CI").is_err() {
+        return;
+    }
+    let dir = TestDir::new("third_party.in");
+    get_stdout_with_args_and_replace_dir(&dir, ["update"]);
+    get_stdout_with_args_and_replace_dir(&dir, ["build"]);
+    get_stdout_with_args_and_replace_dir(&dir, ["clean"]);
+
+    let actual = &get_stdout_with_args_and_replace_dir(&dir, ["check"]);
+    assert!(actual.contains("moon: ran 4 tasks, now up to date"));
+
+    check(
+        &get_stdout_with_args_and_replace_dir(&dir, ["test", "--dry-run", "--sort-input"]),
+        expect![[r#"
+            moon generate-test-driver --source-dir . --target-dir ./target/wasm-gc/debug/test --sort-input --target wasm-gc
+            moonc build-package ./.mooncakes/lijunchen/hello18/lib/hello.mbt -o ./target/wasm-gc/debug/test/.mooncakes/lijunchen/hello18/lib/lib.core -pkg lijunchen/hello18/lib -std-path $MOON_HOME/lib/core/target/wasm-gc/release/bundle -pkg-sources lijunchen/hello18/lib:./.mooncakes/lijunchen/hello18/lib -target wasm-gc -g
+            moonc build-package ./lib/test.mbt ./target/wasm-gc/debug/test/lib/__generated_driver_for_internal_test.mbt -o ./target/wasm-gc/debug/test/lib/lib.internal_test.core -pkg username/hello/lib -is-main -std-path $MOON_HOME/lib/core/target/wasm-gc/release/bundle -i ./target/wasm-gc/debug/test/.mooncakes/lijunchen/hello18/lib/lib.mi:lib -pkg-sources username/hello/lib:./lib -target wasm-gc -g
+            moonc link-core $MOON_HOME/lib/core/target/wasm-gc/release/bundle/core.core ./target/wasm-gc/debug/test/.mooncakes/lijunchen/hello18/lib/lib.core ./target/wasm-gc/debug/test/lib/lib.internal_test.core -main username/hello/lib -o ./target/wasm-gc/debug/test/lib/lib.internal_test.wasm -test-mode -pkg-sources lijunchen/hello18/lib:./lib -pkg-sources username/hello/lib:./lib -pkg-sources moonbitlang/core:$MOON_HOME/lib/core -target wasm-gc -g
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args_and_replace_dir(&dir, ["test", "--sort-input"]),
+        expect![[r#"
+            Hello, world!
+            Hello, world!
+            Total tests: 2, passed: 2, failed: 0.
+        "#]],
+    );
+
+    let actual = &get_stdout_with_args_and_replace_dir(&dir, ["build"]);
+    assert!(actual.contains("moon: ran 5 tasks, now up to date"));
+
+    let actual = &get_stdout_with_args_and_replace_dir(&dir, ["run", "main"]);
+    assert!(actual.contains("Hello, world!"));
+}
+
+#[test]
+fn test_blackbox_success() {
+    let dir = TestDir::new("blackbox_success_test.in");
+
+    check(
+        &get_stdout_with_args_and_replace_dir(
+            &dir,
+            [
+                "test",
+                "-p",
+                "username/hello/A",
+                "-f",
+                "hello_test.mbt",
+                "-i",
+                "0",
+                "--nostd",
+                "--sort-input",
+                "--dry-run",
+            ],
+        ),
+        expect![[r#"
+            moonc build-package ./D/hello.mbt -o ./target/wasm-gc/debug/test/D/D.core -pkg username/hello/D -pkg-sources username/hello/D:./D -target wasm-gc -g
+            moon generate-test-driver --source-dir . --target-dir ./target/wasm-gc/debug/test --package username/hello/A --file hello_test.mbt --index 0 --sort-input --target wasm-gc
+            moonc build-package ./A/hello.mbt -o ./target/wasm-gc/debug/test/A/A.core -pkg username/hello/A -i ./target/wasm-gc/debug/test/D/D.mi:D -pkg-sources username/hello/A:./A -target wasm-gc -g
+            moonc build-package ./C/hello.mbt -o ./target/wasm-gc/debug/test/C/C.core -pkg username/hello/C -pkg-sources username/hello/C:./C -target wasm-gc -g
+            moonc build-package ./A/hello_test.mbt ./target/wasm-gc/debug/test/A/__generated_driver_for_blackbox_test.mbt -o ./target/wasm-gc/debug/test/A/A.blackbox_test.core -pkg username/hello/A_blackbox_test -is-main -i ./target/wasm-gc/debug/test/A/A.mi:A -i ./target/wasm-gc/debug/test/D/D.mi:D -i ./target/wasm-gc/debug/test/C/C.mi:C -pkg-sources username/hello/A_blackbox_test:./A -target wasm-gc -g
+            moonc link-core ./target/wasm-gc/debug/test/D/D.core ./target/wasm-gc/debug/test/C/C.core ./target/wasm-gc/debug/test/A/A.core ./target/wasm-gc/debug/test/A/A.blackbox_test.core -main username/hello/A -o ./target/wasm-gc/debug/test/A/A.blackbox_test.wasm -test-mode -pkg-sources username/hello/D:./D -pkg-sources username/hello/C:./C -pkg-sources username/hello/A:./A -target wasm-gc -g
+            moonc build-package ./B/hello.mbt -o ./target/wasm-gc/debug/test/B/B.core -pkg username/hello/B -pkg-sources username/hello/B:./B -target wasm-gc -g
+            moonc build-package ./A/hello.mbt ./A/hello_wbtest.mbt ./target/wasm-gc/debug/test/A/__generated_driver_for_underscore_test.mbt -o ./target/wasm-gc/debug/test/A/A.underscore_test.core -pkg username/hello/A -is-main -i ./target/wasm-gc/debug/test/D/D.mi:D -i ./target/wasm-gc/debug/test/B/B.mi:B -pkg-sources username/hello/A:./A -target wasm-gc -g
+            moonc link-core ./target/wasm-gc/debug/test/D/D.core ./target/wasm-gc/debug/test/B/B.core ./target/wasm-gc/debug/test/A/A.underscore_test.core -main username/hello/A -o ./target/wasm-gc/debug/test/A/A.underscore_test.wasm -test-mode -pkg-sources username/hello/D:./D -pkg-sources username/hello/B:./B -pkg-sources username/hello/A:./A -target wasm-gc -g
+            moonc build-package ./A/hello.mbt ./target/wasm-gc/debug/test/A/__generated_driver_for_internal_test.mbt -o ./target/wasm-gc/debug/test/A/A.internal_test.core -pkg username/hello/A -is-main -i ./target/wasm-gc/debug/test/D/D.mi:D -pkg-sources username/hello/A:./A -target wasm-gc -g
+            moonc link-core ./target/wasm-gc/debug/test/D/D.core ./target/wasm-gc/debug/test/A/A.internal_test.core -main username/hello/A -o ./target/wasm-gc/debug/test/A/A.internal_test.wasm -test-mode -pkg-sources username/hello/D:./D -pkg-sources username/hello/A:./A -target wasm-gc -g
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args_and_replace_dir(
+            &dir,
+            [
+                "test",
+                "-p",
+                "username/hello/A",
+                "-f",
+                "hello_test.mbt",
+                "-i",
+                "0",
+            ],
+        ),
+        expect![[r#"
+            output from A/hello.mbt!
+            output from C/hello.mbt!
+            output from D/hello.mbt!
+            Total tests: 1, passed: 1, failed: 0.
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args_and_replace_dir(&dir, ["test"]),
+        expect![[r#"
+            output from A/hello.mbt!
+            output from C/hello.mbt!
+            output from D/hello.mbt!
+            self.a: 33
+            Total tests: 2, passed: 2, failed: 0.
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args_and_replace_dir(&dir, ["check", "--sort-input", "--dry-run"]),
+        expect![[r#"
+            moonc check ./main/main.mbt -o ./target/wasm-gc/release/check/main/main.mi -pkg username/hello/main -is-main -std-path $MOON_HOME/lib/core/target/wasm-gc/release/bundle -pkg-sources username/hello/main:./main -target wasm-gc
+            moonc check ./D/hello.mbt -o ./target/wasm-gc/release/check/D/D.mi -pkg username/hello/D -std-path $MOON_HOME/lib/core/target/wasm-gc/release/bundle -pkg-sources username/hello/D:./D -target wasm-gc
+            moonc check ./A/hello.mbt -o ./target/wasm-gc/release/check/A/A.mi -pkg username/hello/A -std-path $MOON_HOME/lib/core/target/wasm-gc/release/bundle -i ./target/wasm-gc/release/check/D/D.mi:D -pkg-sources username/hello/A:./A -target wasm-gc
+            moonc check ./C/hello.mbt -o ./target/wasm-gc/release/check/C/C.mi -pkg username/hello/C -std-path $MOON_HOME/lib/core/target/wasm-gc/release/bundle -pkg-sources username/hello/C:./C -target wasm-gc
+            moonc check ./A/hello_test.mbt -o ./target/wasm-gc/release/check/A/A.blackbox_test.mi -pkg username/hello/A_blackbox_test -std-path $MOON_HOME/lib/core/target/wasm-gc/release/bundle -i ./target/wasm-gc/release/check/A/A.mi:A -i ./target/wasm-gc/release/check/D/D.mi:D -i ./target/wasm-gc/release/check/C/C.mi:C -pkg-sources username/hello/A_blackbox_test:./A -target wasm-gc
+            moonc check ./B/hello.mbt -o ./target/wasm-gc/release/check/B/B.mi -pkg username/hello/B -std-path $MOON_HOME/lib/core/target/wasm-gc/release/bundle -pkg-sources username/hello/B:./B -target wasm-gc
+            moonc check ./A/hello.mbt ./A/hello_wbtest.mbt -o ./target/wasm-gc/release/check/A/A.underscore_test.mi -pkg username/hello/A -std-path $MOON_HOME/lib/core/target/wasm-gc/release/bundle -i ./target/wasm-gc/release/check/D/D.mi:D -i ./target/wasm-gc/release/check/B/B.mi:B -pkg-sources username/hello/A:./A -target wasm-gc
+        "#]],
+    );
+
+    snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["check", "--sort-input"])
+        .assert()
+        .success();
+
+    #[cfg(unix)]
+    {
+        let p = dir.join(format!(
+            "target/{}/release/check/packages.json",
+            TargetBackend::default().to_backend_ext()
+        ));
+        check(
+            &replace_dir(&std::fs::read_to_string(p).unwrap(), &dir),
+            expect![[r#"
+                {
+                  "source_dir": "$ROOT",
+                  "name": "username/hello",
+                  "packages": [
+                    {
+                      "is-main": false,
+                      "is-third-party": false,
+                      "root": "username/hello",
+                      "rel": "A",
+                      "files": [
+                        "$ROOT/A/hello.mbt"
+                      ],
+                      "wbtest-files": [
+                        "$ROOT/A/hello_wbtest.mbt"
+                      ],
+                      "test-files": [
+                        "$ROOT/A/hello_test.mbt"
+                      ],
+                      "deps": [
+                        {
+                          "path": "username/hello/D",
+                          "alias": "D"
+                        }
+                      ],
+                      "wbtest-deps": [
+                        {
+                          "path": "username/hello/B",
+                          "alias": "B"
+                        }
+                      ],
+                      "test-deps": [
+                        {
+                          "path": "username/hello/C",
+                          "alias": "C"
+                        }
+                      ],
+                      "artifact": "$ROOT/target/wasm-gc/release/check/A/A.mi"
+                    },
+                    {
+                      "is-main": false,
+                      "is-third-party": false,
+                      "root": "username/hello",
+                      "rel": "B",
+                      "files": [
+                        "$ROOT/B/hello.mbt"
+                      ],
+                      "wbtest-files": [],
+                      "test-files": [],
+                      "deps": [],
+                      "wbtest-deps": [],
+                      "test-deps": [],
+                      "artifact": "$ROOT/target/wasm-gc/release/check/B/B.mi"
+                    },
+                    {
+                      "is-main": false,
+                      "is-third-party": false,
+                      "root": "username/hello",
+                      "rel": "C",
+                      "files": [
+                        "$ROOT/C/hello.mbt"
+                      ],
+                      "wbtest-files": [],
+                      "test-files": [],
+                      "deps": [],
+                      "wbtest-deps": [],
+                      "test-deps": [],
+                      "artifact": "$ROOT/target/wasm-gc/release/check/C/C.mi"
+                    },
+                    {
+                      "is-main": false,
+                      "is-third-party": false,
+                      "root": "username/hello",
+                      "rel": "D",
+                      "files": [
+                        "$ROOT/D/hello.mbt"
+                      ],
+                      "wbtest-files": [],
+                      "test-files": [],
+                      "deps": [],
+                      "wbtest-deps": [],
+                      "test-deps": [],
+                      "artifact": "$ROOT/target/wasm-gc/release/check/D/D.mi"
+                    },
+                    {
+                      "is-main": true,
+                      "is-third-party": false,
+                      "root": "username/hello",
+                      "rel": "main",
+                      "files": [
+                        "$ROOT/main/main.mbt"
+                      ],
+                      "wbtest-files": [],
+                      "test-files": [],
+                      "deps": [],
+                      "wbtest-deps": [],
+                      "test-deps": [],
+                      "artifact": "$ROOT/target/wasm-gc/release/check/main/main.mi"
+                    }
+                  ],
+                  "deps": [],
+                  "backend": "wasm-gc"
+                }"#]],
+        );
+    }
+}
+
+#[test]
+fn test_blackbox_failed() {
+    let dir = TestDir::new("blackbox_failed_test.in");
+
+    let output = snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .arg("test")
+        .assert()
+        .failure()
+        .get_output()
+        .stdout
+        .to_owned();
+
+    let output = String::from_utf8_lossy(&output);
+    // bbtest can not use private function in bbtest_import
+    assert!(output.contains("Value _private_hello not found in package \"A\""));
+    // bbtest_import could no be used in _wbtest.mbt
+    assert!(output.contains("Package \"C\" not found in the loaded packages."));
+
+    let output = snapbox::cmd::Command::new(moon_bin())
+        .current_dir(&dir)
+        .args(["check"])
+        .assert()
+        .failure()
+        .get_output()
+        .stdout
+        .to_owned();
+
+    let output = String::from_utf8_lossy(&output);
+    assert!(output.contains("Warning: Unused variable 'a'"));
+    assert!(output.contains("Error: Error (warning): The mutability of 'b' is never used"));
+    assert!(output.contains("Value _private_hello not found in package \"A\""));
+    assert!(output.contains("Package \"C\" not found in the loaded packages."));
+}
+
+#[test]
+fn test_import_memory_and_heap_start() {
+    let dir = TestDir::new("import_memory.in");
+    check(
+        &get_stdout_with_args_and_replace_dir(
+            &dir,
+            [
+                "build",
+                "--target",
+                "wasm",
+                "--dry-run",
+                "--sort-input",
+                "--nostd",
+            ],
+        ),
+        expect![[r#"
+            moonc build-package ./lib/hello.mbt -o ./target/wasm/release/build/lib/lib.core -pkg username/hello/lib -pkg-sources username/hello/lib:./lib -target wasm
+            moonc build-package ./main/main.mbt -o ./target/wasm/release/build/main/main.core -pkg username/hello/main -is-main -i ./target/wasm/release/build/lib/lib.mi:lib -pkg-sources username/hello/main:./main -target wasm
+            moonc link-core ./target/wasm/release/build/lib/lib.core ./target/wasm/release/build/main/main.core -main username/hello/main -o ./target/wasm/release/build/main/main.wasm -pkg-sources username/hello/lib:./lib -pkg-sources username/hello/main:./main -target wasm -import-memory-module xxx -import-memory-name yyy -heap-start-address 65536
+        "#]],
+    );
+
+    let dir = TestDir::new("import_memory.in");
+    check(
+        &get_stdout_with_args_and_replace_dir(
+            &dir,
+            [
+                "build",
+                "--target",
+                "wasm-gc",
+                "--dry-run",
+                "--sort-input",
+                "--nostd",
+            ],
+        ),
+        expect![[r#"
+            moonc build-package ./lib/hello.mbt -o ./target/wasm-gc/release/build/lib/lib.core -pkg username/hello/lib -pkg-sources username/hello/lib:./lib -target wasm-gc
+            moonc build-package ./main/main.mbt -o ./target/wasm-gc/release/build/main/main.core -pkg username/hello/main -is-main -i ./target/wasm-gc/release/build/lib/lib.mi:lib -pkg-sources username/hello/main:./main -target wasm-gc
+            moonc link-core ./target/wasm-gc/release/build/lib/lib.core ./target/wasm-gc/release/build/main/main.core -main username/hello/main -o ./target/wasm-gc/release/build/main/main.wasm -pkg-sources username/hello/lib:./lib -pkg-sources username/hello/main:./main -target wasm-gc -import-memory-module xxx -import-memory-name yyy
+        "#]],
+    );
+}
+
+#[test]
+fn test_many_targets() {
+    let dir = TestDir::new("test_many_targets.in");
+    check(
+        &get_stdout_with_args_and_replace_dir(&dir, ["test", "--target", "all"]),
+        expect![[r#"
+            Total tests: 0, passed: 0, failed: 0.
+            Total tests: 0, passed: 0, failed: 0.
+            Total tests: 0, passed: 0, failed: 0.
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args_and_replace_dir(
+            &dir,
+            [
+                "check",
+                "--target",
+                "js,wasm",
+                "--dry-run",
+                "--serial",
+                "--nostd",
+                "--sort-input",
+            ],
+        ),
+        expect![[r#"
+            moonc check ./link/hello.mbt -o ./target/wasm/release/check/link/link.mi -pkg username/hello/link -pkg-sources username/hello/link:./link -target wasm
+            moonc check ./lib/hello.mbt -o ./target/wasm/release/check/lib/lib.mi -pkg username/hello/lib -pkg-sources username/hello/lib:./lib -target wasm
+            moonc check ./link/hello.mbt -o ./target/js/release/check/link/link.mi -pkg username/hello/link -pkg-sources username/hello/link:./link -target js
+            moonc check ./lib/hello.mbt -o ./target/js/release/check/lib/lib.mi -pkg username/hello/lib -pkg-sources username/hello/lib:./lib -target js
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args_and_replace_dir(
+            &dir,
+            [
+                "build",
+                "--target",
+                "js,wasm",
+                "--dry-run",
+                "--serial",
+                "--nostd",
+                "--sort-input",
+            ],
+        ),
+        expect![[r#"
+            moonc build-package ./link/hello.mbt -o ./target/wasm/release/build/link/link.core -pkg username/hello/link -pkg-sources username/hello/link:./link -target wasm
+            moonc link-core ./target/wasm/release/build/link/link.core -main username/hello/link -o ./target/wasm/release/build/link/link.wasm -pkg-sources username/hello/link:./link -target wasm
+            moonc build-package ./link/hello.mbt -o ./target/js/release/build/link/link.core -pkg username/hello/link -pkg-sources username/hello/link:./link -target js
+            moonc link-core ./target/js/release/build/link/link.core -main username/hello/link -o ./target/js/release/build/link/link.js -pkg-sources username/hello/link:./link -target js
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args_and_replace_dir(
+            &dir,
+            [
+                "bundle",
+                "--target",
+                "js,wasm",
+                "--dry-run",
+                "--serial",
+                "--nostd",
+                "--sort-input",
+            ],
+        ),
+        expect![[r#"
+            moonc build-package ./lib/hello.mbt -o ./target/wasm/release/bundle/lib/lib.core -pkg username/hello/lib -pkg-sources username/hello/lib:./lib -target wasm
+            moonc build-package ./link/hello.mbt -o ./target/wasm/release/bundle/link/link.core -pkg username/hello/link -pkg-sources username/hello/link:./link -target wasm
+            moonc bundle-core ./target/wasm/release/bundle/lib/lib.core ./target/wasm/release/bundle/link/link.core -o ./target/wasm/release/bundle/hello.core
+            moonc build-package ./lib/hello.mbt -o ./target/js/release/bundle/lib/lib.core -pkg username/hello/lib -pkg-sources username/hello/lib:./lib -target js
+            moonc build-package ./link/hello.mbt -o ./target/js/release/bundle/link/link.core -pkg username/hello/link -pkg-sources username/hello/link:./link -target js
+            moonc bundle-core ./target/js/release/bundle/lib/lib.core ./target/js/release/bundle/link/link.core -o ./target/js/release/bundle/hello.core
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args_and_replace_dir(
+            &dir,
+            [
+                "test",
+                "--target",
+                "js,wasm",
+                "--dry-run",
+                "--serial",
+                "--nostd",
+                "--sort-input",
+            ],
+        ),
+        expect![[r#"
+            moon generate-test-driver --source-dir . --target-dir ./target/wasm/debug/test --sort-input --target wasm
+            moonc build-package ./link/hello.mbt ./target/wasm/debug/test/link/__generated_driver_for_internal_test.mbt -o ./target/wasm/debug/test/link/link.internal_test.core -pkg username/hello/link -is-main -pkg-sources username/hello/link:./link -target wasm -g
+            moonc link-core ./target/wasm/debug/test/link/link.internal_test.core -main username/hello/link -o ./target/wasm/debug/test/link/link.internal_test.wasm -test-mode -pkg-sources username/hello/link:./link -target wasm -g
+            moonc build-package ./lib/hello.mbt ./target/wasm/debug/test/lib/__generated_driver_for_internal_test.mbt -o ./target/wasm/debug/test/lib/lib.internal_test.core -pkg username/hello/lib -is-main -pkg-sources username/hello/lib:./lib -target wasm -g
+            moonc link-core ./target/wasm/debug/test/lib/lib.internal_test.core -main username/hello/lib -o ./target/wasm/debug/test/lib/lib.internal_test.wasm -test-mode -pkg-sources username/hello/lib:./lib -target wasm -g
+            moon generate-test-driver --source-dir . --target-dir ./target/js/debug/test --sort-input --target js
+            moonc build-package ./link/hello.mbt ./target/js/debug/test/link/__generated_driver_for_internal_test.mbt -o ./target/js/debug/test/link/link.internal_test.core -pkg username/hello/link -is-main -pkg-sources username/hello/link:./link -target js -g -ryu
+            moonc link-core ./target/js/debug/test/link/link.internal_test.core -main username/hello/link -o ./target/js/debug/test/link/link.internal_test.js -test-mode -pkg-sources username/hello/link:./link -target js -g -ryu
+            moonc build-package ./lib/hello.mbt ./target/js/debug/test/lib/__generated_driver_for_internal_test.mbt -o ./target/js/debug/test/lib/lib.internal_test.core -pkg username/hello/lib -is-main -pkg-sources username/hello/lib:./lib -target js -g -ryu
+            moonc link-core ./target/js/debug/test/lib/lib.internal_test.core -main username/hello/lib -o ./target/js/debug/test/lib/lib.internal_test.js -test-mode -pkg-sources username/hello/lib:./lib -target js -g -ryu
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args_and_replace_dir(
+            &dir,
+            [
+                "test",
+                "--target",
+                "js,wasm",
+                "--dry-run",
+                "--serial",
+                "--nostd",
+                "--sort-input",
+                "-p",
+                "username/hello/lib",
+                "-f",
+                "hello.mbt",
+                "-i",
+                "0",
+            ],
+        ),
+        expect![[r#"
+            moon generate-test-driver --source-dir . --target-dir ./target/wasm/debug/test --package username/hello/lib --file hello.mbt --index 0 --sort-input --target wasm
+            moonc build-package ./lib/hello.mbt ./target/wasm/debug/test/lib/__generated_driver_for_internal_test.mbt -o ./target/wasm/debug/test/lib/lib.internal_test.core -pkg username/hello/lib -is-main -pkg-sources username/hello/lib:./lib -target wasm -g
+            moonc link-core ./target/wasm/debug/test/lib/lib.internal_test.core -main username/hello/lib -o ./target/wasm/debug/test/lib/lib.internal_test.wasm -test-mode -pkg-sources username/hello/lib:./lib -target wasm -g
+            moon generate-test-driver --source-dir . --target-dir ./target/js/debug/test --package username/hello/lib --file hello.mbt --index 0 --sort-input --target js
+            moonc build-package ./lib/hello.mbt ./target/js/debug/test/lib/__generated_driver_for_internal_test.mbt -o ./target/js/debug/test/lib/lib.internal_test.core -pkg username/hello/lib -is-main -pkg-sources username/hello/lib:./lib -target js -g -ryu
+            moonc link-core ./target/js/debug/test/lib/lib.internal_test.core -main username/hello/lib -o ./target/js/debug/test/lib/lib.internal_test.js -test-mode -pkg-sources username/hello/lib:./lib -target js -g -ryu
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args_and_replace_dir(
+            &dir,
+            [
+                "test",
+                "--target",
+                "js,wasm,all",
+                "--dry-run",
+                "--serial",
+                "--nostd",
+                "--sort-input",
+            ],
+        ),
+        expect![[r#"
+            moon generate-test-driver --source-dir . --target-dir ./target/wasm/debug/test --sort-input --target wasm
+            moonc build-package ./link/hello.mbt ./target/wasm/debug/test/link/__generated_driver_for_internal_test.mbt -o ./target/wasm/debug/test/link/link.internal_test.core -pkg username/hello/link -is-main -pkg-sources username/hello/link:./link -target wasm -g
+            moonc link-core ./target/wasm/debug/test/link/link.internal_test.core -main username/hello/link -o ./target/wasm/debug/test/link/link.internal_test.wasm -test-mode -pkg-sources username/hello/link:./link -target wasm -g
+            moonc build-package ./lib/hello.mbt ./target/wasm/debug/test/lib/__generated_driver_for_internal_test.mbt -o ./target/wasm/debug/test/lib/lib.internal_test.core -pkg username/hello/lib -is-main -pkg-sources username/hello/lib:./lib -target wasm -g
+            moonc link-core ./target/wasm/debug/test/lib/lib.internal_test.core -main username/hello/lib -o ./target/wasm/debug/test/lib/lib.internal_test.wasm -test-mode -pkg-sources username/hello/lib:./lib -target wasm -g
+            moon generate-test-driver --source-dir . --target-dir ./target/wasm-gc/debug/test --sort-input --target wasm-gc
+            moonc build-package ./link/hello.mbt ./target/wasm-gc/debug/test/link/__generated_driver_for_internal_test.mbt -o ./target/wasm-gc/debug/test/link/link.internal_test.core -pkg username/hello/link -is-main -pkg-sources username/hello/link:./link -target wasm-gc -g
+            moonc link-core ./target/wasm-gc/debug/test/link/link.internal_test.core -main username/hello/link -o ./target/wasm-gc/debug/test/link/link.internal_test.wasm -test-mode -pkg-sources username/hello/link:./link -target wasm-gc -g
+            moonc build-package ./lib/hello.mbt ./target/wasm-gc/debug/test/lib/__generated_driver_for_internal_test.mbt -o ./target/wasm-gc/debug/test/lib/lib.internal_test.core -pkg username/hello/lib -is-main -pkg-sources username/hello/lib:./lib -target wasm-gc -g
+            moonc link-core ./target/wasm-gc/debug/test/lib/lib.internal_test.core -main username/hello/lib -o ./target/wasm-gc/debug/test/lib/lib.internal_test.wasm -test-mode -pkg-sources username/hello/lib:./lib -target wasm-gc -g
+            moon generate-test-driver --source-dir . --target-dir ./target/js/debug/test --sort-input --target js
+            moonc build-package ./link/hello.mbt ./target/js/debug/test/link/__generated_driver_for_internal_test.mbt -o ./target/js/debug/test/link/link.internal_test.core -pkg username/hello/link -is-main -pkg-sources username/hello/link:./link -target js -g -ryu
+            moonc link-core ./target/js/debug/test/link/link.internal_test.core -main username/hello/link -o ./target/js/debug/test/link/link.internal_test.js -test-mode -pkg-sources username/hello/link:./link -target js -g -ryu
+            moonc build-package ./lib/hello.mbt ./target/js/debug/test/lib/__generated_driver_for_internal_test.mbt -o ./target/js/debug/test/lib/lib.internal_test.core -pkg username/hello/lib -is-main -pkg-sources username/hello/lib:./lib -target js -g -ryu
+            moonc link-core ./target/js/debug/test/lib/lib.internal_test.core -main username/hello/lib -o ./target/js/debug/test/lib/lib.internal_test.js -test-mode -pkg-sources username/hello/lib:./lib -target js -g -ryu
+        "#]],
+    );
+
+    check(
+        &get_stdout_with_args_and_replace_dir(
+            &dir,
+            [
+                "test",
+                "--target",
+                "all",
+                "--dry-run",
+                "--serial",
+                "--nostd",
+                "--sort-input",
+            ],
+        ),
+        expect![[r#"
+            moon generate-test-driver --source-dir . --target-dir ./target/wasm/debug/test --sort-input --target wasm
+            moonc build-package ./link/hello.mbt ./target/wasm/debug/test/link/__generated_driver_for_internal_test.mbt -o ./target/wasm/debug/test/link/link.internal_test.core -pkg username/hello/link -is-main -pkg-sources username/hello/link:./link -target wasm -g
+            moonc link-core ./target/wasm/debug/test/link/link.internal_test.core -main username/hello/link -o ./target/wasm/debug/test/link/link.internal_test.wasm -test-mode -pkg-sources username/hello/link:./link -target wasm -g
+            moonc build-package ./lib/hello.mbt ./target/wasm/debug/test/lib/__generated_driver_for_internal_test.mbt -o ./target/wasm/debug/test/lib/lib.internal_test.core -pkg username/hello/lib -is-main -pkg-sources username/hello/lib:./lib -target wasm -g
+            moonc link-core ./target/wasm/debug/test/lib/lib.internal_test.core -main username/hello/lib -o ./target/wasm/debug/test/lib/lib.internal_test.wasm -test-mode -pkg-sources username/hello/lib:./lib -target wasm -g
+            moon generate-test-driver --source-dir . --target-dir ./target/wasm-gc/debug/test --sort-input --target wasm-gc
+            moonc build-package ./link/hello.mbt ./target/wasm-gc/debug/test/link/__generated_driver_for_internal_test.mbt -o ./target/wasm-gc/debug/test/link/link.internal_test.core -pkg username/hello/link -is-main -pkg-sources username/hello/link:./link -target wasm-gc -g
+            moonc link-core ./target/wasm-gc/debug/test/link/link.internal_test.core -main username/hello/link -o ./target/wasm-gc/debug/test/link/link.internal_test.wasm -test-mode -pkg-sources username/hello/link:./link -target wasm-gc -g
+            moonc build-package ./lib/hello.mbt ./target/wasm-gc/debug/test/lib/__generated_driver_for_internal_test.mbt -o ./target/wasm-gc/debug/test/lib/lib.internal_test.core -pkg username/hello/lib -is-main -pkg-sources username/hello/lib:./lib -target wasm-gc -g
+            moonc link-core ./target/wasm-gc/debug/test/lib/lib.internal_test.core -main username/hello/lib -o ./target/wasm-gc/debug/test/lib/lib.internal_test.wasm -test-mode -pkg-sources username/hello/lib:./lib -target wasm-gc -g
+            moon generate-test-driver --source-dir . --target-dir ./target/js/debug/test --sort-input --target js
+            moonc build-package ./link/hello.mbt ./target/js/debug/test/link/__generated_driver_for_internal_test.mbt -o ./target/js/debug/test/link/link.internal_test.core -pkg username/hello/link -is-main -pkg-sources username/hello/link:./link -target js -g -ryu
+            moonc link-core ./target/js/debug/test/link/link.internal_test.core -main username/hello/link -o ./target/js/debug/test/link/link.internal_test.js -test-mode -pkg-sources username/hello/link:./link -target js -g -ryu
+            moonc build-package ./lib/hello.mbt ./target/js/debug/test/lib/__generated_driver_for_internal_test.mbt -o ./target/js/debug/test/lib/lib.internal_test.core -pkg username/hello/lib -is-main -pkg-sources username/hello/lib:./lib -target js -g -ryu
+            moonc link-core ./target/js/debug/test/lib/lib.internal_test.core -main username/hello/lib -o ./target/js/debug/test/lib/lib.internal_test.js -test-mode -pkg-sources username/hello/lib:./lib -target js -g -ryu
+        "#]],
+    );
+}
+
+#[test]
+fn test_many_targets_auto_update_001() {
+    let dir = TestDir::new("test_many_targets_auto_update.in");
+    let _ = get_stdout_with_args_and_replace_dir(&dir, ["test", "-u"]);
+    check(
+        &replace_crlf_to_lf(&std::fs::read_to_string(dir.join("lib").join("x.wasm.mbt")).unwrap()),
+        expect![[r#"
+            test {
+              inspect!("wasm")
+            }
+        "#]],
+    );
+    check(
+        &replace_crlf_to_lf(
+            &std::fs::read_to_string(dir.join("lib").join("x.wasm-gc.mbt")).unwrap(),
+        ),
+        expect![[r#"
+            test {
+              inspect!("wasm-gc", content="wasm-gc")
+            }
+        "#]],
+    );
+    check(
+        &replace_crlf_to_lf(&std::fs::read_to_string(dir.join("lib").join("x.js.mbt")).unwrap()),
+        expect![[r#"
+            test {
+              inspect!("js")
+            }
+        "#]],
+    );
+}
+
+#[test]
+fn test_many_targets_auto_update_002() {
+    let dir = TestDir::new("test_many_targets_auto_update.in");
+    let _ = get_stdout_with_args_and_replace_dir(&dir, ["test", "--target", "js", "-u"]);
+    check(
+        &replace_crlf_to_lf(&std::fs::read_to_string(dir.join("lib").join("x.wasm.mbt")).unwrap()),
+        expect![[r#"
+            test {
+              inspect!("wasm")
+            }
+        "#]],
+    );
+    check(
+        &replace_crlf_to_lf(
+            &std::fs::read_to_string(dir.join("lib").join("x.wasm-gc.mbt")).unwrap(),
+        ),
+        expect![[r#"
+            test {
+              inspect!("wasm-gc")
+            }
+        "#]],
+    );
+    check(
+        &replace_crlf_to_lf(&std::fs::read_to_string(dir.join("lib").join("x.js.mbt")).unwrap()),
+        expect![[r#"
+            test {
+              inspect!("js", content="js")
+            }
+        "#]],
+    );
+}
+
+#[test]
+fn test_many_targets_auto_update_003() {
+    let dir = TestDir::new("test_many_targets_auto_update.in");
+    let _ = get_stdout_with_args_and_replace_dir(&dir, ["test", "--target", "js,wasm", "-u"]);
+    check(
+        &replace_crlf_to_lf(&std::fs::read_to_string(dir.join("lib").join("x.wasm.mbt")).unwrap()),
+        expect![[r#"
+            test {
+              inspect!("wasm", content="wasm")
+            }
+        "#]],
+    );
+    check(
+        &replace_crlf_to_lf(
+            &std::fs::read_to_string(dir.join("lib").join("x.wasm-gc.mbt")).unwrap(),
+        ),
+        expect![[r#"
+            test {
+              inspect!("wasm-gc")
+            }
+        "#]],
+    );
+    check(
+        &replace_crlf_to_lf(&std::fs::read_to_string(dir.join("lib").join("x.js.mbt")).unwrap()),
+        expect![[r#"
+            test {
+              inspect!("js", content="js")
+            }
+        "#]],
+    );
+}
+
+#[test]
+fn test_many_targets_auto_update_004() {
+    let dir = TestDir::new("test_many_targets_auto_update.in");
+    let _ = get_stdout_with_args_and_replace_dir(&dir, ["test", "--target", "all", "-u"]);
+    check(
+        &replace_crlf_to_lf(&std::fs::read_to_string(dir.join("lib").join("x.wasm.mbt")).unwrap()),
+        expect![[r#"
+            test {
+              inspect!("wasm", content="wasm")
+            }
+        "#]],
+    );
+    check(
+        &replace_crlf_to_lf(
+            &std::fs::read_to_string(dir.join("lib").join("x.wasm-gc.mbt")).unwrap(),
+        ),
+        expect![[r#"
+            test {
+              inspect!("wasm-gc", content="wasm-gc")
+            }
+        "#]],
+    );
+    check(
+        &replace_crlf_to_lf(&std::fs::read_to_string(dir.join("lib").join("x.js.mbt")).unwrap()),
+        expect![[r#"
+            test {
+              inspect!("js", content="js")
+            }
+        "#]],
+    );
+}
+
+#[test]
+fn test_many_targets_expect_failed() {
+    let dir = TestDir::new("test_many_targets_expect_failed.in");
+    check(
+        &get_err_stdout_with_args_and_replace_dir(
+            &dir,
+            ["test", "--target", "all", "--serial", "--sort-input"],
+        ),
+        expect![[r#"
+            test username/hello/lib/x.wasm.mbt::0 failed
+            expect test failed at $ROOT/lib/x.wasm.mbt:2:3-2:32
+            Diff:
+            ----
+            0wasm
+            ----
+
+            Total tests: 1, passed: 0, failed: 1.
+            test username/hello/lib/x.wasm-gc.mbt::0 failed
+            expect test failed at $ROOT/lib/x.wasm-gc.mbt:2:3-2:35
+            Diff:
+            ----
+            1wasm-gc
+            ----
+
+            Total tests: 1, passed: 0, failed: 1.
+            test username/hello/lib/x.js.mbt::0 failed
+            expect test failed at $ROOT/lib/x.js.mbt:2:3-2:30
+            Diff:
+            ----
+            2js
+            ----
+
+            Total tests: 1, passed: 0, failed: 1.
+        "#]],
+    );
+    check(
+        &get_err_stdout_with_args_and_replace_dir(
+            &dir,
+            ["test", "--target", "js,wasm", "--sort-input", "--serial"],
+        ),
+        expect![[r#"
+            test username/hello/lib/x.wasm.mbt::0 failed
+            expect test failed at $ROOT/lib/x.wasm.mbt:2:3-2:32
+            Diff:
+            ----
+            0wasm
+            ----
+
+            Total tests: 1, passed: 0, failed: 1.
+            test username/hello/lib/x.js.mbt::0 failed
+            expect test failed at $ROOT/lib/x.js.mbt:2:3-2:30
+            Diff:
+            ----
+            2js
+            ----
+
+            Total tests: 1, passed: 0, failed: 1.
+        "#]],
+    );
+}
+
+#[test]
+fn test_moon_run_single_mbt_file() {
+    let dir = TestDir::new("run_single_mbt_file.in");
+
+    #[cfg(unix)]
+    {
+        let output =
+            get_stdout_with_args_and_replace_dir(&dir, ["run", "a/b/single.mbt", "--dry-run"]);
+        check(
+            &output,
+            expect![[r#"
+            moonc build-package $ROOT/a/b/single.mbt -o $ROOT/a/b/single.core -std-path $MOON_HOME/lib/core/target/wasm-gc/release/bundle -is-main -target wasm-gc
+            moonc link-core $MOON_HOME/lib/core/target/wasm-gc/release/bundle/core.core $ROOT/a/b/single.core -o $ROOT/a/b/single.wasm -target wasm-gc
+            moonrun $ROOT/a/b/single.wasm
+        "#]],
+        );
+
+        let output = get_stdout_with_args_and_replace_dir(
+            &dir,
+            ["run", "a/b/single.mbt", "--target", "js", "--dry-run"],
+        );
+        check(
+            &output,
+            expect![[r#"
+            moonc build-package $ROOT/a/b/single.mbt -o $ROOT/a/b/single.core -std-path $MOON_HOME/lib/core/target/js/release/bundle -is-main -target js
+            moonc link-core $MOON_HOME/lib/core/target/js/release/bundle/core.core $ROOT/a/b/single.core -o $ROOT/a/b/single.js -target js
+            node $ROOT/a/b/single.js
+        "#]],
+        );
+    }
+
+    let output = get_stdout_with_args_and_replace_dir(&dir, ["run", "a/b/single.mbt"]);
+    check(
+        &output,
+        expect![[r#"
+        I am OK
+    "#]],
+    );
+    let core_output_path = dir.join("a").join("b").join("single.core");
+    assert!(core_output_path.exists());
+    assert!(!dir.join("single.core").exists());
+
+    core_output_path.rm_rf();
+    assert!(!core_output_path.exists());
+
+    let output = get_stdout_with_args_and_replace_dir(
+        &dir.join("a").join("b").join("c"),
+        ["run", "../single.mbt"],
+    );
+    check(
+        &output,
+        expect![[r#"
+            I am OK
+            "#]],
+    );
+    let core_output_path = dir.join("a").join("b").join("single.core");
+    assert!(core_output_path.exists());
+    assert!(!dir
+        .join("a")
+        .join("b")
+        .join("c")
+        .join("single.core")
+        .exists());
+
+    let output = get_stdout_with_args_and_replace_dir(
+        &dir.join("a").join("b"),
+        ["run", "single.mbt", "--target", "js"],
+    );
+    check(
+        &output,
+        expect![[r#"
+        I am OK
+        "#]],
+    );
+    assert!(dir.join("a").join("b").join("single.js").exists());
+}
diff --git a/crates/moon/tests/test_cases/moo_run_with_cli_args.in/.gitignore b/crates/moon/tests/test_cases/moo_run_with_cli_args.in/.gitignore
new file mode 100644
index 00000000..b1283a74
--- /dev/null
+++ b/crates/moon/tests/test_cases/moo_run_with_cli_args.in/.gitignore
@@ -0,0 +1,2 @@
+target/
+.mooncakes/
diff --git a/crates/moon/tests/test_cases/moo_run_with_cli_args.in/README.md b/crates/moon/tests/test_cases/moo_run_with_cli_args.in/README.md
new file mode 100644
index 00000000..ae00983f
--- /dev/null
+++ b/crates/moon/tests/test_cases/moo_run_with_cli_args.in/README.md
@@ -0,0 +1 @@
+# username/hello
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moo_run_with_cli_args.in/main/main.mbt b/crates/moon/tests/test_cases/moo_run_with_cli_args.in/main/main.mbt
new file mode 100644
index 00000000..c02d3958
--- /dev/null
+++ b/crates/moon/tests/test_cases/moo_run_with_cli_args.in/main/main.mbt
@@ -0,0 +1,89 @@
+fn main {
+  let args = get_args()
+  println(args)
+}
+
+fn env_get_var(s : ExternString) -> ExternString = "__moonbit_fs_unstable" "env_get_var"
+
+fn args_get() -> JSArray = "__moonbit_fs_unstable" "args_get"
+
+pub fn get_env_var(name : String) -> String? {
+  let res = env_get_var(string_to_extern(name))
+  let mbt_string = string_from_extern(res)
+  if mbt_string == "" {
+    None
+  } else {
+    Some(mbt_string)
+  }
+}
+
+pub fn get_args() -> Array[String] {
+  let arr = args_get()
+  let len = array_len(arr)
+  let res = []
+  for i = 0; i < len; i = i + 1 {
+    let val = arr[i]
+    if jsvalue_is_string(val).not() {
+      abort("Expected all strings in array")
+    }
+    res.push(string_from_extern(jsvalue_get_string(val)))
+  }
+  res
+}
+
+type JSValue
+
+pub fn jsvalue_is_string(v : JSValue) -> Bool = "__moonbit_fs_unstable" "jsvalue_is_string"
+
+pub fn jsvalue_get_string(v : JSValue) -> ExternString = "%identity"
+
+pub type JSArray
+
+pub fn array_len(arr : JSArray) -> Int = "__moonbit_fs_unstable" "array_len"
+
+pub fn array_get(arr : JSArray, idx : Int) -> JSValue = "__moonbit_fs_unstable" "array_get"
+
+pub fn JSArray::op_get(self : JSArray, idx : Int) -> JSValue {
+  return array_get(self, idx)
+}
+
+type StringCreateHandle
+
+type StringReadHandle
+
+pub type ExternString
+
+fn begin_create_string() -> StringCreateHandle = "__moonbit_fs_unstable" "begin_create_string"
+
+fn string_append_char(handle : StringCreateHandle, ch : Char) = "__moonbit_fs_unstable" "string_append_char"
+
+fn finish_create_string(handle : StringCreateHandle) -> ExternString = "__moonbit_fs_unstable" "finish_create_string"
+
+pub fn string_to_extern(s : String) -> ExternString {
+  let handle = begin_create_string()
+  s.iter().each(fn(ch) { string_append_char(handle, ch) })
+  finish_create_string(handle)
+}
+
+fn begin_read_string(s : ExternString) -> StringReadHandle = "__moonbit_fs_unstable" "begin_read_string"
+
+/// Read one char from the string, returns -1 if the end of the string is reached.
+/// The number returned is the unicode codepoint of the character.
+fn string_read_char(handle : StringReadHandle) -> Int = "__moonbit_fs_unstable" "string_read_char"
+
+fn finish_read_string(handle : StringReadHandle) = "__moonbit_fs_unstable" "finish_read_string"
+
+pub fn string_from_extern(e : ExternString) -> String {
+  let buf = Buffer::new()
+  let handle = begin_read_string(e)
+  while true {
+    let ch = string_read_char(handle)
+    if ch == -1 {
+      break
+    } else {
+      buf.write_char(Char::from_int(ch))
+    }
+  }
+  finish_read_string(handle)
+  buf.to_string()
+}
diff --git a/crates/moon/tests/test_cases/moo_run_with_cli_args.in/main/moon.pkg.json b/crates/moon/tests/test_cases/moo_run_with_cli_args.in/main/moon.pkg.json
new file mode 100644
index 00000000..fcc86bad
--- /dev/null
+++ b/crates/moon/tests/test_cases/moo_run_with_cli_args.in/main/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "is-main": true
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moo_run_with_cli_args.in/moon.mod.json b/crates/moon/tests/test_cases/moo_run_with_cli_args.in/moon.mod.json
new file mode 100644
index 00000000..80554ae2
--- /dev/null
+++ b/crates/moon/tests/test_cases/moo_run_with_cli_args.in/moon.mod.json
@@ -0,0 +1,9 @@
+{
+  "name": "username/hello",
+  "version": "0.1.0",
+  "readme": "README.md",
+  "repository": "",
+  "license": "",
+  "keywords": [],
+  "description": ""
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_bundle.in/A/lib.mbt b/crates/moon/tests/test_cases/moon_bundle.in/A/lib.mbt
new file mode 100644
index 00000000..0c8ba57d
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_bundle.in/A/lib.mbt
@@ -0,0 +1,3 @@
+pub fn f() -> Unit {
+  println("A")
+}
diff --git a/crates/moon/tests/test_cases/moon_bundle.in/A/moon.pkg.json b/crates/moon/tests/test_cases/moon_bundle.in/A/moon.pkg.json
new file mode 100644
index 00000000..0ca2f124
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_bundle.in/A/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+    "import": {}
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_bundle.in/B/lib.mbt b/crates/moon/tests/test_cases/moon_bundle.in/B/lib.mbt
new file mode 100644
index 00000000..98f4a947
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_bundle.in/B/lib.mbt
@@ -0,0 +1,4 @@
+pub fn f() -> Unit {
+  @A.f()
+  println("B")
+}
diff --git a/crates/moon/tests/test_cases/moon_bundle.in/B/moon.pkg.json b/crates/moon/tests/test_cases/moon_bundle.in/B/moon.pkg.json
new file mode 100644
index 00000000..9a3516fa
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_bundle.in/B/moon.pkg.json
@@ -0,0 +1,5 @@
+{
+    "import": {
+        "moonbitlang/core/A": ""
+    }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_bundle.in/C/lib.mbt b/crates/moon/tests/test_cases/moon_bundle.in/C/lib.mbt
new file mode 100644
index 00000000..8695ab4c
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_bundle.in/C/lib.mbt
@@ -0,0 +1,4 @@
+pub fn f() -> Unit {
+  @A.f()
+  println("C")
+}
diff --git a/crates/moon/tests/test_cases/moon_bundle.in/C/moon.pkg.json b/crates/moon/tests/test_cases/moon_bundle.in/C/moon.pkg.json
new file mode 100644
index 00000000..9a3516fa
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_bundle.in/C/moon.pkg.json
@@ -0,0 +1,5 @@
+{
+    "import": {
+        "moonbitlang/core/A": ""
+    }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_bundle.in/Orphan/lib.mbt b/crates/moon/tests/test_cases/moon_bundle.in/Orphan/lib.mbt
new file mode 100644
index 00000000..d4bbc21a
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_bundle.in/Orphan/lib.mbt
@@ -0,0 +1,3 @@
+pub fn f() -> Unit {
+  println("Orphan")
+}
diff --git a/crates/moon/tests/test_cases/moon_bundle.in/Orphan/moon.pkg.json b/crates/moon/tests/test_cases/moon_bundle.in/Orphan/moon.pkg.json
new file mode 100644
index 00000000..0ca2f124
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_bundle.in/Orphan/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+    "import": {}
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_bundle.in/moon.mod.json b/crates/moon/tests/test_cases/moon_bundle.in/moon.mod.json
new file mode 100644
index 00000000..8a6e1f35
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_bundle.in/moon.mod.json
@@ -0,0 +1,3 @@
+{
+    "name": "moonbitlang/core"
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_commands.in/lib/list/lib.mbt b/crates/moon/tests/test_cases/moon_commands.in/lib/list/lib.mbt
new file mode 100644
index 00000000..ae9f6590
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_commands.in/lib/list/lib.mbt
@@ -0,0 +1,3 @@
+pub fn new_list() -> Unit {
+  println("new_list")
+}
diff --git a/crates/moon/tests/test_cases/moon_commands.in/lib/list/moon.pkg.json b/crates/moon/tests/test_cases/moon_commands.in/lib/list/moon.pkg.json
new file mode 100644
index 00000000..72eb22fe
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_commands.in/lib/list/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_commands.in/lib/queue/lib.mbt b/crates/moon/tests/test_cases/moon_commands.in/lib/queue/lib.mbt
new file mode 100644
index 00000000..1c9b2665
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_commands.in/lib/queue/lib.mbt
@@ -0,0 +1,3 @@
+pub fn new_queue() -> Unit {
+  println("new_queue")
+}
diff --git a/crates/moon/tests/test_cases/moon_commands.in/lib/queue/moon.pkg.json b/crates/moon/tests/test_cases/moon_commands.in/lib/queue/moon.pkg.json
new file mode 100644
index 00000000..ebb8ec26
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_commands.in/lib/queue/moon.pkg.json
@@ -0,0 +1,5 @@
+{
+  "import": {
+    "design/lib/list": ""
+  }
+}
diff --git a/crates/moon/tests/test_cases/moon_commands.in/lib/stack/lib.mbt b/crates/moon/tests/test_cases/moon_commands.in/lib/stack/lib.mbt
new file mode 100644
index 00000000..24535f2b
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_commands.in/lib/stack/lib.mbt
@@ -0,0 +1,3 @@
+pub fn new_stack() -> Unit {
+  println("new_stack")
+}
diff --git a/crates/moon/tests/test_cases/moon_commands.in/lib/stack/moon.pkg.json b/crates/moon/tests/test_cases/moon_commands.in/lib/stack/moon.pkg.json
new file mode 100644
index 00000000..6a134137
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_commands.in/lib/stack/moon.pkg.json
@@ -0,0 +1,5 @@
+{
+  "import": {
+    "design/lib/list": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_commands.in/lib/vec/lib.mbt b/crates/moon/tests/test_cases/moon_commands.in/lib/vec/lib.mbt
new file mode 100644
index 00000000..e3f9a5b2
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_commands.in/lib/vec/lib.mbt
@@ -0,0 +1,3 @@
+pub fn new_vec() -> Unit {
+  println("new_vec")
+}
diff --git a/crates/moon/tests/test_cases/moon_commands.in/lib/vec/moon.pkg.json b/crates/moon/tests/test_cases/moon_commands.in/lib/vec/moon.pkg.json
new file mode 100644
index 00000000..9585a087
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_commands.in/lib/vec/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
diff --git a/crates/moon/tests/test_cases/moon_commands.in/main1/main.mbt b/crates/moon/tests/test_cases/moon_commands.in/main1/main.mbt
new file mode 100644
index 00000000..b38b25de
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_commands.in/main1/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+
+}
diff --git a/crates/moon/tests/test_cases/moon_commands.in/main1/moon.pkg.json b/crates/moon/tests/test_cases/moon_commands.in/main1/moon.pkg.json
new file mode 100644
index 00000000..3573ae96
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_commands.in/main1/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": {
+    "design/lib/queue": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_commands.in/main2/main.mbt b/crates/moon/tests/test_cases/moon_commands.in/main2/main.mbt
new file mode 100644
index 00000000..72777741
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_commands.in/main2/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println("main2")
+}
diff --git a/crates/moon/tests/test_cases/moon_commands.in/main2/moon.pkg.json b/crates/moon/tests/test_cases/moon_commands.in/main2/moon.pkg.json
new file mode 100644
index 00000000..3573ae96
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_commands.in/main2/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": {
+    "design/lib/queue": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_commands.in/moon.mod.json b/crates/moon/tests/test_cases/moon_commands.in/moon.mod.json
new file mode 100644
index 00000000..d3f9d801
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_commands.in/moon.mod.json
@@ -0,0 +1,3 @@
+{
+  "name": "design"
+}
diff --git a/crates/moon/tests/test_cases/moon_fmt.in/.gitignore b/crates/moon/tests/test_cases/moon_fmt.in/.gitignore
new file mode 100644
index 00000000..b1283a74
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_fmt.in/.gitignore
@@ -0,0 +1,2 @@
+target/
+.mooncakes/
diff --git a/crates/moon/tests/test_cases/moon_fmt.in/README.md b/crates/moon/tests/test_cases/moon_fmt.in/README.md
new file mode 100644
index 00000000..ae00983f
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_fmt.in/README.md
@@ -0,0 +1 @@
+# username/hello
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_fmt.in/lib/hello.mbt b/crates/moon/tests/test_cases/moon_fmt.in/lib/hello.mbt
new file mode 100644
index 00000000..36574a79
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_fmt.in/lib/hello.mbt
@@ -0,0 +1 @@
+pub fn hello() -> String { "Hello, world!" }
diff --git a/crates/moon/tests/test_cases/moon_fmt.in/lib/hello_wbtest.mbt b/crates/moon/tests/test_cases/moon_fmt.in/lib/hello_wbtest.mbt
new file mode 100644
index 00000000..64f26429
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_fmt.in/lib/hello_wbtest.mbt
@@ -0,0 +1,5 @@
+test "hello" {
+  if hello() != "Hello, world!" {
+    return Err("hello() != \"Hello, world!\"")
+  }
+}
diff --git a/crates/moon/tests/test_cases/moon_fmt.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/moon_fmt.in/lib/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_fmt.in/lib/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_fmt.in/main/main.mbt b/crates/moon/tests/test_cases/moon_fmt.in/main/main.mbt
new file mode 100644
index 00000000..b7eb1b8a
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_fmt.in/main/main.mbt
@@ -0,0 +1 @@
+fn main { println(@lib.hello()) }
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_fmt.in/main/moon.pkg.json b/crates/moon/tests/test_cases/moon_fmt.in/main/moon.pkg.json
new file mode 100644
index 00000000..99dc8491
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_fmt.in/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is_main": true,
+  "import": [
+    "username/hello/lib"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_fmt.in/moon.mod.json b/crates/moon/tests/test_cases/moon_fmt.in/moon.mod.json
new file mode 100644
index 00000000..80554ae2
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_fmt.in/moon.mod.json
@@ -0,0 +1,9 @@
+{
+  "name": "username/hello",
+  "version": "0.1.0",
+  "readme": "README.md",
+  "repository": "",
+  "license": "",
+  "keywords": [],
+  "description": ""
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_inline_test_001.in/.gitignore b/crates/moon/tests/test_cases/moon_inline_test_001.in/.gitignore
new file mode 100644
index 00000000..b1283a74
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_inline_test_001.in/.gitignore
@@ -0,0 +1,2 @@
+target/
+.mooncakes/
diff --git a/crates/moon/tests/test_cases/moon_inline_test_001.in/README.md b/crates/moon/tests/test_cases/moon_inline_test_001.in/README.md
new file mode 100644
index 00000000..ae00983f
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_inline_test_001.in/README.md
@@ -0,0 +1 @@
+# username/hello
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_inline_test_001.in/lib/hello.mbt b/crates/moon/tests/test_cases/moon_inline_test_001.in/lib/hello.mbt
new file mode 100644
index 00000000..9012592a
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_inline_test_001.in/lib/hello.mbt
@@ -0,0 +1,3 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
diff --git a/crates/moon/tests/test_cases/moon_inline_test_001.in/lib/hello_wbtest.mbt b/crates/moon/tests/test_cases/moon_inline_test_001.in/lib/hello_wbtest.mbt
new file mode 100644
index 00000000..427f5685
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_inline_test_001.in/lib/hello_wbtest.mbt
@@ -0,0 +1,3 @@
+test {
+
+}
diff --git a/crates/moon/tests/test_cases/moon_inline_test_001.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/moon_inline_test_001.in/lib/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_inline_test_001.in/lib/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_inline_test_001.in/main/main.mbt b/crates/moon/tests/test_cases/moon_inline_test_001.in/main/main.mbt
new file mode 100644
index 00000000..d25cb935
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_inline_test_001.in/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println(@lib.hello())
+}
diff --git a/crates/moon/tests/test_cases/moon_inline_test_001.in/main/moon.pkg.json b/crates/moon/tests/test_cases/moon_inline_test_001.in/main/moon.pkg.json
new file mode 100644
index 00000000..48783525
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_inline_test_001.in/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": [
+    "username/hello/lib"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_inline_test_001.in/moon.mod.json b/crates/moon/tests/test_cases/moon_inline_test_001.in/moon.mod.json
new file mode 100644
index 00000000..da06d445
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_inline_test_001.in/moon.mod.json
@@ -0,0 +1,8 @@
+{
+  "name": "username/hello",
+  "version": "0.1.0",
+  "readme": "README.md",
+  "repository": "",
+  "license": "",
+  "keywords": []
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_inline_test_002.in/.gitignore b/crates/moon/tests/test_cases/moon_inline_test_002.in/.gitignore
new file mode 100644
index 00000000..b1283a74
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_inline_test_002.in/.gitignore
@@ -0,0 +1,2 @@
+target/
+.mooncakes/
diff --git a/crates/moon/tests/test_cases/moon_inline_test_002.in/README.md b/crates/moon/tests/test_cases/moon_inline_test_002.in/README.md
new file mode 100644
index 00000000..ae00983f
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_inline_test_002.in/README.md
@@ -0,0 +1 @@
+# username/hello
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_inline_test_002.in/lib/hello.mbt b/crates/moon/tests/test_cases/moon_inline_test_002.in/lib/hello.mbt
new file mode 100644
index 00000000..9012592a
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_inline_test_002.in/lib/hello.mbt
@@ -0,0 +1,3 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
diff --git a/crates/moon/tests/test_cases/moon_inline_test_002.in/lib/hello_wbtest.mbt b/crates/moon/tests/test_cases/moon_inline_test_002.in/lib/hello_wbtest.mbt
new file mode 100644
index 00000000..3aab0e0c
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_inline_test_002.in/lib/hello_wbtest.mbt
@@ -0,0 +1,5 @@
+test {
+  if hello() != "Hello, world!" {
+    raise "some error messages"
+  }
+}
diff --git a/crates/moon/tests/test_cases/moon_inline_test_002.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/moon_inline_test_002.in/lib/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_inline_test_002.in/lib/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_inline_test_002.in/main/main.mbt b/crates/moon/tests/test_cases/moon_inline_test_002.in/main/main.mbt
new file mode 100644
index 00000000..d25cb935
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_inline_test_002.in/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println(@lib.hello())
+}
diff --git a/crates/moon/tests/test_cases/moon_inline_test_002.in/main/moon.pkg.json b/crates/moon/tests/test_cases/moon_inline_test_002.in/main/moon.pkg.json
new file mode 100644
index 00000000..48783525
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_inline_test_002.in/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": [
+    "username/hello/lib"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_inline_test_002.in/moon.mod.json b/crates/moon/tests/test_cases/moon_inline_test_002.in/moon.mod.json
new file mode 100644
index 00000000..da06d445
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_inline_test_002.in/moon.mod.json
@@ -0,0 +1,8 @@
+{
+  "name": "username/hello",
+  "version": "0.1.0",
+  "readme": "README.md",
+  "repository": "",
+  "license": "",
+  "keywords": []
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_inline_test_003.in/.gitignore b/crates/moon/tests/test_cases/moon_inline_test_003.in/.gitignore
new file mode 100644
index 00000000..b1283a74
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_inline_test_003.in/.gitignore
@@ -0,0 +1,2 @@
+target/
+.mooncakes/
diff --git a/crates/moon/tests/test_cases/moon_inline_test_003.in/README.md b/crates/moon/tests/test_cases/moon_inline_test_003.in/README.md
new file mode 100644
index 00000000..ae00983f
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_inline_test_003.in/README.md
@@ -0,0 +1 @@
+# username/hello
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_inline_test_003.in/lib/hello.mbt b/crates/moon/tests/test_cases/moon_inline_test_003.in/lib/hello.mbt
new file mode 100644
index 00000000..9012592a
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_inline_test_003.in/lib/hello.mbt
@@ -0,0 +1,3 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
diff --git a/crates/moon/tests/test_cases/moon_inline_test_003.in/lib/hello_wbtest.mbt b/crates/moon/tests/test_cases/moon_inline_test_003.in/lib/hello_wbtest.mbt
new file mode 100644
index 00000000..e82261e2
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_inline_test_003.in/lib/hello_wbtest.mbt
@@ -0,0 +1,3 @@
+test {
+  raise "some msg"
+}
diff --git a/crates/moon/tests/test_cases/moon_inline_test_003.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/moon_inline_test_003.in/lib/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_inline_test_003.in/lib/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_inline_test_003.in/main/main.mbt b/crates/moon/tests/test_cases/moon_inline_test_003.in/main/main.mbt
new file mode 100644
index 00000000..d25cb935
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_inline_test_003.in/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println(@lib.hello())
+}
diff --git a/crates/moon/tests/test_cases/moon_inline_test_003.in/main/moon.pkg.json b/crates/moon/tests/test_cases/moon_inline_test_003.in/main/moon.pkg.json
new file mode 100644
index 00000000..48783525
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_inline_test_003.in/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": [
+    "username/hello/lib"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_inline_test_003.in/moon.mod.json b/crates/moon/tests/test_cases/moon_inline_test_003.in/moon.mod.json
new file mode 100644
index 00000000..da06d445
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_inline_test_003.in/moon.mod.json
@@ -0,0 +1,8 @@
+{
+  "name": "username/hello",
+  "version": "0.1.0",
+  "readme": "README.md",
+  "repository": "",
+  "license": "",
+  "keywords": []
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_inline_test_004.in/.gitignore b/crates/moon/tests/test_cases/moon_inline_test_004.in/.gitignore
new file mode 100644
index 00000000..b1283a74
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_inline_test_004.in/.gitignore
@@ -0,0 +1,2 @@
+target/
+.mooncakes/
diff --git a/crates/moon/tests/test_cases/moon_inline_test_004.in/README.md b/crates/moon/tests/test_cases/moon_inline_test_004.in/README.md
new file mode 100644
index 00000000..ae00983f
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_inline_test_004.in/README.md
@@ -0,0 +1 @@
+# username/hello
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_inline_test_004.in/lib/hello.mbt b/crates/moon/tests/test_cases/moon_inline_test_004.in/lib/hello.mbt
new file mode 100644
index 00000000..13e8bc60
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_inline_test_004.in/lib/hello.mbt
@@ -0,0 +1,7 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
+
+test {
+  return Err("some msg")
+}
diff --git a/crates/moon/tests/test_cases/moon_inline_test_004.in/lib/hello_wbtest.mbt b/crates/moon/tests/test_cases/moon_inline_test_004.in/lib/hello_wbtest.mbt
new file mode 100644
index 00000000..bad4cb75
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_inline_test_004.in/lib/hello_wbtest.mbt
@@ -0,0 +1,5 @@
+test {
+  if hello() != "Hello, world!" {
+    return Err("hello != world")
+  }
+}
diff --git a/crates/moon/tests/test_cases/moon_inline_test_004.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/moon_inline_test_004.in/lib/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_inline_test_004.in/lib/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_inline_test_004.in/main/main.mbt b/crates/moon/tests/test_cases/moon_inline_test_004.in/main/main.mbt
new file mode 100644
index 00000000..d25cb935
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_inline_test_004.in/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println(@lib.hello())
+}
diff --git a/crates/moon/tests/test_cases/moon_inline_test_004.in/main/moon.pkg.json b/crates/moon/tests/test_cases/moon_inline_test_004.in/main/moon.pkg.json
new file mode 100644
index 00000000..48783525
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_inline_test_004.in/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": [
+    "username/hello/lib"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_inline_test_004.in/moon.mod.json b/crates/moon/tests/test_cases/moon_inline_test_004.in/moon.mod.json
new file mode 100644
index 00000000..da06d445
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_inline_test_004.in/moon.mod.json
@@ -0,0 +1,8 @@
+{
+  "name": "username/hello",
+  "version": "0.1.0",
+  "readme": "README.md",
+  "repository": "",
+  "license": "",
+  "keywords": []
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_inline_test_order.in/.gitignore b/crates/moon/tests/test_cases/moon_inline_test_order.in/.gitignore
new file mode 100644
index 00000000..b1283a74
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_inline_test_order.in/.gitignore
@@ -0,0 +1,2 @@
+target/
+.mooncakes/
diff --git a/crates/moon/tests/test_cases/moon_inline_test_order.in/A/A_wbtest.mbt b/crates/moon/tests/test_cases/moon_inline_test_order.in/A/A_wbtest.mbt
new file mode 100644
index 00000000..7006c4bc
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_inline_test_order.in/A/A_wbtest.mbt
@@ -0,0 +1,7 @@
+test {
+  println("A_test.mbt::init")
+}
+
+test {
+  println("A_test.mbt::test_hello_A")
+}
diff --git a/crates/moon/tests/test_cases/moon_inline_test_order.in/A/hello.mbt b/crates/moon/tests/test_cases/moon_inline_test_order.in/A/hello.mbt
new file mode 100644
index 00000000..9bb00ff7
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_inline_test_order.in/A/hello.mbt
@@ -0,0 +1,7 @@
+test {
+  println("executing A")
+}
+
+test {
+  println("executing A::hello.mbt::test_A")
+}
diff --git a/crates/moon/tests/test_cases/moon_inline_test_order.in/A/moon.pkg.json b/crates/moon/tests/test_cases/moon_inline_test_order.in/A/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_inline_test_order.in/A/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_inline_test_order.in/B/B_wbtest.mbt b/crates/moon/tests/test_cases/moon_inline_test_order.in/B/B_wbtest.mbt
new file mode 100644
index 00000000..d8231741
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_inline_test_order.in/B/B_wbtest.mbt
@@ -0,0 +1,7 @@
+test {
+  println("B_test.mbt::init")
+}
+
+test {
+  println("B_test.mbt::test_hello_B")
+}
diff --git a/crates/moon/tests/test_cases/moon_inline_test_order.in/B/hello.mbt b/crates/moon/tests/test_cases/moon_inline_test_order.in/B/hello.mbt
new file mode 100644
index 00000000..f56880b4
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_inline_test_order.in/B/hello.mbt
@@ -0,0 +1,7 @@
+test {
+  println("executing B")
+}
+
+test {
+  println("executing B::hello.mbt::test_B")
+}
diff --git a/crates/moon/tests/test_cases/moon_inline_test_order.in/B/moon.pkg.json b/crates/moon/tests/test_cases/moon_inline_test_order.in/B/moon.pkg.json
new file mode 100644
index 00000000..15cf122d
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_inline_test_order.in/B/moon.pkg.json
@@ -0,0 +1,5 @@
+{
+    "import": [
+        "username/hello/A"
+    ]
+}
diff --git a/crates/moon/tests/test_cases/moon_inline_test_order.in/README.md b/crates/moon/tests/test_cases/moon_inline_test_order.in/README.md
new file mode 100644
index 00000000..ae00983f
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_inline_test_order.in/README.md
@@ -0,0 +1 @@
+# username/hello
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_inline_test_order.in/main/main.mbt b/crates/moon/tests/test_cases/moon_inline_test_order.in/main/main.mbt
new file mode 100644
index 00000000..61de731e
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_inline_test_order.in/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println("main.mbt::init")
+}
diff --git a/crates/moon/tests/test_cases/moon_inline_test_order.in/main/moon.pkg.json b/crates/moon/tests/test_cases/moon_inline_test_order.in/main/moon.pkg.json
new file mode 100644
index 00000000..255bfc6c
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_inline_test_order.in/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": [
+    "username/hello/B"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_inline_test_order.in/moon.mod.json b/crates/moon/tests/test_cases/moon_inline_test_order.in/moon.mod.json
new file mode 100644
index 00000000..d26fe667
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_inline_test_order.in/moon.mod.json
@@ -0,0 +1,9 @@
+{
+  "name": "username/hello",
+  "version": "0.1.0",
+  "deps": {},
+  "readme": "README.md",
+  "repository": "",
+  "license": "",
+  "keywords": []
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_new.in/lib/hello.mbt b/crates/moon/tests/test_cases/moon_new.in/lib/hello.mbt
new file mode 100644
index 00000000..a7ac2bee
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_new.in/lib/hello.mbt
@@ -0,0 +1,4 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
+
diff --git a/crates/moon/tests/test_cases/moon_new.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/moon_new.in/lib/moon.pkg.json
new file mode 100644
index 00000000..9585a087
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_new.in/lib/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
diff --git a/crates/moon/tests/test_cases/moon_new.in/main/main.mbt b/crates/moon/tests/test_cases/moon_new.in/main/main.mbt
new file mode 100644
index 00000000..d25cb935
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_new.in/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println(@lib.hello())
+}
diff --git a/crates/moon/tests/test_cases/moon_new.in/main/moon.pkg.json b/crates/moon/tests/test_cases/moon_new.in/main/moon.pkg.json
new file mode 100644
index 00000000..4343a4ef
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_new.in/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": {
+    "moon_new/lib": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_new.in/moon.mod.json b/crates/moon/tests/test_cases/moon_new.in/moon.mod.json
new file mode 100644
index 00000000..b5d8b346
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_new.in/moon.mod.json
@@ -0,0 +1,3 @@
+{
+  "name": "moon_new"
+}
diff --git a/crates/moon/tests/test_cases/moon_new_and_watch/lib/hello.mbt b/crates/moon/tests/test_cases/moon_new_and_watch/lib/hello.mbt
new file mode 100644
index 00000000..a7ac2bee
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_new_and_watch/lib/hello.mbt
@@ -0,0 +1,4 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
+
diff --git a/crates/moon/tests/test_cases/moon_new_and_watch/lib/moon.pkg.json b/crates/moon/tests/test_cases/moon_new_and_watch/lib/moon.pkg.json
new file mode 100644
index 00000000..9585a087
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_new_and_watch/lib/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
diff --git a/crates/moon/tests/test_cases/moon_new_and_watch/main/main.mbt b/crates/moon/tests/test_cases/moon_new_and_watch/main/main.mbt
new file mode 100644
index 00000000..d25cb935
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_new_and_watch/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println(@lib.hello())
+}
diff --git a/crates/moon/tests/test_cases/moon_new_and_watch/main/moon.pkg.json b/crates/moon/tests/test_cases/moon_new_and_watch/main/moon.pkg.json
new file mode 100644
index 00000000..4343a4ef
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_new_and_watch/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": {
+    "moon_new/lib": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_new_and_watch/moon.mod.json b/crates/moon/tests/test_cases/moon_new_and_watch/moon.mod.json
new file mode 100644
index 00000000..ab3f2156
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_new_and_watch/moon.mod.json
@@ -0,0 +1,3 @@
+{
+  "name": "moon_new"
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_new_exist.in/.gitkeep b/crates/moon/tests/test_cases/moon_new_exist.in/.gitkeep
new file mode 100644
index 00000000..e69de29b
diff --git a/crates/moon/tests/test_cases/moon_new_new.in/.gitkeep b/crates/moon/tests/test_cases/moon_new_new.in/.gitkeep
new file mode 100644
index 00000000..e69de29b
diff --git a/crates/moon/tests/test_cases/moon_new_snapshot.in/.gitkeep b/crates/moon/tests/test_cases/moon_new_snapshot.in/.gitkeep
new file mode 100644
index 00000000..e69de29b
diff --git a/crates/moon/tests/test_cases/moon_run_with_cli_args.in/main/main.mbt b/crates/moon/tests/test_cases/moon_run_with_cli_args.in/main/main.mbt
new file mode 100644
index 00000000..c02d3958
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_run_with_cli_args.in/main/main.mbt
@@ -0,0 +1,89 @@
+fn main {
+  let args = get_args()
+  println(args)
+}
+
+fn env_get_var(s : ExternString) -> ExternString = "__moonbit_fs_unstable" "env_get_var"
+
+fn args_get() -> JSArray = "__moonbit_fs_unstable" "args_get"
+
+pub fn get_env_var(name : String) -> String? {
+  let res = env_get_var(string_to_extern(name))
+  let mbt_string = string_from_extern(res)
+  if mbt_string == "" {
+    None
+  } else {
+    Some(mbt_string)
+  }
+}
+
+pub fn get_args() -> Array[String] {
+  let arr = args_get()
+  let len = array_len(arr)
+  let res = []
+  for i = 0; i < len; i = i + 1 {
+    let val = arr[i]
+    if jsvalue_is_string(val).not() {
+      abort("Expected all strings in array")
+    }
+    res.push(string_from_extern(jsvalue_get_string(val)))
+  }
+  res
+}
+
+type JSValue
+
+pub fn jsvalue_is_string(v : JSValue) -> Bool = "__moonbit_fs_unstable" "jsvalue_is_string"
+
+pub fn jsvalue_get_string(v : JSValue) -> ExternString = "%identity"
+
+pub type JSArray
+
+pub fn array_len(arr : JSArray) -> Int = "__moonbit_fs_unstable" "array_len"
+
+pub fn array_get(arr : JSArray, idx : Int) -> JSValue = "__moonbit_fs_unstable" "array_get"
+
+pub fn JSArray::op_get(self : JSArray, idx : Int) -> JSValue {
+  return array_get(self, idx)
+}
+
+type StringCreateHandle
+
+type StringReadHandle
+
+pub type ExternString
+
+fn begin_create_string() -> StringCreateHandle = "__moonbit_fs_unstable" "begin_create_string"
+
+fn string_append_char(handle : StringCreateHandle, ch : Char) = "__moonbit_fs_unstable" "string_append_char"
+
+fn finish_create_string(handle : StringCreateHandle) -> ExternString = "__moonbit_fs_unstable" "finish_create_string"
+
+pub fn string_to_extern(s : String) -> ExternString {
+  let handle = begin_create_string()
+  s.iter().each(fn(ch) { string_append_char(handle, ch) })
+  finish_create_string(handle)
+}
+
+fn begin_read_string(s : ExternString) -> StringReadHandle = "__moonbit_fs_unstable" "begin_read_string"
+
+/// Read one char from the string, returns -1 if the end of the string is reached.
+/// The number returned is the unicode codepoint of the character.
+fn string_read_char(handle : StringReadHandle) -> Int = "__moonbit_fs_unstable" "string_read_char"
+
+fn finish_read_string(handle : StringReadHandle) = "__moonbit_fs_unstable" "finish_read_string"
+
+pub fn string_from_extern(e : ExternString) -> String {
+  let buf = Buffer::new()
+  let handle = begin_read_string(e)
+  while true {
+    let ch = string_read_char(handle)
+    if ch == -1 {
+      break
+    } else {
+      buf.write_char(Char::from_int(ch))
+    }
+  }
+  finish_read_string(handle)
+  buf.to_string()
+}
diff --git a/crates/moon/tests/test_cases/moon_test.in/lib/hello.mbt b/crates/moon/tests/test_cases/moon_test.in/lib/hello.mbt
new file mode 100644
index 00000000..a7ac2bee
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test.in/lib/hello.mbt
@@ -0,0 +1,4 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
+
diff --git a/crates/moon/tests/test_cases/moon_test.in/lib/hello_wbtest.mbt b/crates/moon/tests/test_cases/moon_test.in/lib/hello_wbtest.mbt
new file mode 100644
index 00000000..328a3a20
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test.in/lib/hello_wbtest.mbt
@@ -0,0 +1,5 @@
+test {
+  if hello() != "Hello, world!" {
+    raise "not ok"
+  }
+}
diff --git a/crates/moon/tests/test_cases/moon_test.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/moon_test.in/lib/moon.pkg.json
new file mode 100644
index 00000000..9585a087
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test.in/lib/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
diff --git a/crates/moon/tests/test_cases/moon_test.in/lib2/hello.mbt b/crates/moon/tests/test_cases/moon_test.in/lib2/hello.mbt
new file mode 100644
index 00000000..4f92d312
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test.in/lib2/hello.mbt
@@ -0,0 +1,4 @@
+pub fn hello() -> String {
+  "hello"
+}
+
diff --git a/crates/moon/tests/test_cases/moon_test.in/lib2/hello_wbtest.mbt b/crates/moon/tests/test_cases/moon_test.in/lib2/hello_wbtest.mbt
new file mode 100644
index 00000000..c5c0506e
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test.in/lib2/hello_wbtest.mbt
@@ -0,0 +1,5 @@
+test {
+  if hello() != "Hello, world!" {
+    raise "hello() != \"Hello, World\""
+  }
+}
diff --git a/crates/moon/tests/test_cases/moon_test.in/lib2/moon.pkg.json b/crates/moon/tests/test_cases/moon_test.in/lib2/moon.pkg.json
new file mode 100644
index 00000000..9585a087
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test.in/lib2/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
diff --git a/crates/moon/tests/test_cases/moon_test.in/lib2/nested/lib.mbt b/crates/moon/tests/test_cases/moon_test.in/lib2/nested/lib.mbt
new file mode 100644
index 00000000..83035f21
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test.in/lib2/nested/lib.mbt
@@ -0,0 +1,3 @@
+pub fn add1(x : Int) -> Int {
+  x + 2
+}
diff --git a/crates/moon/tests/test_cases/moon_test.in/lib2/nested/lib_wbtest.mbt b/crates/moon/tests/test_cases/moon_test.in/lib2/nested/lib_wbtest.mbt
new file mode 100644
index 00000000..cb7506fe
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test.in/lib2/nested/lib_wbtest.mbt
@@ -0,0 +1,11 @@
+test {
+  if add1(1) != 2 {
+    raise "add1(1) should be 2"
+  }
+}
+
+test {
+  if @lib2.hello() != "hello" {
+    raise "@lib2.hello() should be `hello`"
+  }
+}
diff --git a/crates/moon/tests/test_cases/moon_test.in/lib2/nested/moon.pkg.json b/crates/moon/tests/test_cases/moon_test.in/lib2/nested/moon.pkg.json
new file mode 100644
index 00000000..b302fe77
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test.in/lib2/nested/moon.pkg.json
@@ -0,0 +1,8 @@
+{
+  "import": {
+    "moontest/lib2": ""
+  },
+  "wbtest-import": [
+    "moontest/lib2"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_test.in/lib3/hello.mbt b/crates/moon/tests/test_cases/moon_test.in/lib3/hello.mbt
new file mode 100644
index 00000000..a7ac2bee
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test.in/lib3/hello.mbt
@@ -0,0 +1,4 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
+
diff --git a/crates/moon/tests/test_cases/moon_test.in/lib3/hello_wbtest.mbt b/crates/moon/tests/test_cases/moon_test.in/lib3/hello_wbtest.mbt
new file mode 100644
index 00000000..328a3a20
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test.in/lib3/hello_wbtest.mbt
@@ -0,0 +1,5 @@
+test {
+  if hello() != "Hello, world!" {
+    raise "not ok"
+  }
+}
diff --git a/crates/moon/tests/test_cases/moon_test.in/lib3/moon.pkg.json b/crates/moon/tests/test_cases/moon_test.in/lib3/moon.pkg.json
new file mode 100644
index 00000000..9585a087
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test.in/lib3/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
diff --git a/crates/moon/tests/test_cases/moon_test.in/lib4/hello.mbt b/crates/moon/tests/test_cases/moon_test.in/lib4/hello.mbt
new file mode 100644
index 00000000..a7ac2bee
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test.in/lib4/hello.mbt
@@ -0,0 +1,4 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
+
diff --git a/crates/moon/tests/test_cases/moon_test.in/lib4/hello_wbtest.mbt b/crates/moon/tests/test_cases/moon_test.in/lib4/hello_wbtest.mbt
new file mode 100644
index 00000000..328a3a20
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test.in/lib4/hello_wbtest.mbt
@@ -0,0 +1,5 @@
+test {
+  if hello() != "Hello, world!" {
+    raise "not ok"
+  }
+}
diff --git a/crates/moon/tests/test_cases/moon_test.in/lib4/moon.pkg.json b/crates/moon/tests/test_cases/moon_test.in/lib4/moon.pkg.json
new file mode 100644
index 00000000..9585a087
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test.in/lib4/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
diff --git a/crates/moon/tests/test_cases/moon_test.in/lib5/hello_wbtest.mbt b/crates/moon/tests/test_cases/moon_test.in/lib5/hello_wbtest.mbt
new file mode 100644
index 00000000..2d15337e
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test.in/lib5/hello_wbtest.mbt
@@ -0,0 +1,29 @@
+test {
+  ()
+}
+
+test "" {
+
+}
+
+test "without_space" {
+  ()
+}
+
+test "with space" {
+  ()
+}
+
+// TODO:
+// the output of debug("with space and \" and \\") is not correct
+
+// test "with space and \"" {
+//   return Ok(())
+// }
+// test "with space and \" and \\" {
+//   return Ok(())
+// }
+// test "with space and \" and \\ and one line" {
+//   let _ = "\" \" \\"
+//   return Ok(())
+// }
diff --git a/crates/moon/tests/test_cases/moon_test.in/lib5/moon.pkg.json b/crates/moon/tests/test_cases/moon_test.in/lib5/moon.pkg.json
new file mode 100644
index 00000000..9585a087
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test.in/lib5/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
diff --git a/crates/moon/tests/test_cases/moon_test.in/main/main.mbt b/crates/moon/tests/test_cases/moon_test.in/main/main.mbt
new file mode 100644
index 00000000..d25cb935
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test.in/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println(@lib.hello())
+}
diff --git a/crates/moon/tests/test_cases/moon_test.in/main/moon.pkg.json b/crates/moon/tests/test_cases/moon_test.in/main/moon.pkg.json
new file mode 100644
index 00000000..66e2dc7d
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test.in/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": {
+    "moontest/lib": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_test.in/moon.mod.json b/crates/moon/tests/test_cases/moon_test.in/moon.mod.json
new file mode 100644
index 00000000..365fb995
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test.in/moon.mod.json
@@ -0,0 +1,3 @@
+{
+  "name": "moontest"
+}
diff --git a/crates/moon/tests/test_cases/moon_test_hello_exec.in/.gitignore b/crates/moon/tests/test_cases/moon_test_hello_exec.in/.gitignore
new file mode 100644
index 00000000..b1283a74
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_hello_exec.in/.gitignore
@@ -0,0 +1,2 @@
+target/
+.mooncakes/
diff --git a/crates/moon/tests/test_cases/moon_test_hello_exec.in/lib/hello.mbt b/crates/moon/tests/test_cases/moon_test_hello_exec.in/lib/hello.mbt
new file mode 100644
index 00000000..9012592a
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_hello_exec.in/lib/hello.mbt
@@ -0,0 +1,3 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
diff --git a/crates/moon/tests/test_cases/moon_test_hello_exec.in/lib/hello_wbtest.mbt b/crates/moon/tests/test_cases/moon_test_hello_exec.in/lib/hello_wbtest.mbt
new file mode 100644
index 00000000..5478ec1d
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_hello_exec.in/lib/hello_wbtest.mbt
@@ -0,0 +1,6 @@
+test {
+  println("this is lib test")
+  if hello() != "Hello, world!" {
+    abort("")
+  }
+}
diff --git a/crates/moon/tests/test_cases/moon_test_hello_exec.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/moon_test_hello_exec.in/lib/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_hello_exec.in/lib/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_test_hello_exec.in/main/main.mbt b/crates/moon/tests/test_cases/moon_test_hello_exec.in/main/main.mbt
new file mode 100644
index 00000000..d25cb935
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_hello_exec.in/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println(@lib.hello())
+}
diff --git a/crates/moon/tests/test_cases/moon_test_hello_exec.in/main/main_wbtest.mbt b/crates/moon/tests/test_cases/moon_test_hello_exec.in/main/main_wbtest.mbt
new file mode 100644
index 00000000..92ead011
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_hello_exec.in/main/main_wbtest.mbt
@@ -0,0 +1,3 @@
+test {
+  println("this is main test")
+}
diff --git a/crates/moon/tests/test_cases/moon_test_hello_exec.in/main/moon.pkg.json b/crates/moon/tests/test_cases/moon_test_hello_exec.in/main/moon.pkg.json
new file mode 100644
index 00000000..02016c81
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_hello_exec.in/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": [
+    "moonbitlang/hello/lib"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_test_hello_exec.in/moon.mod.json b/crates/moon/tests/test_cases/moon_test_hello_exec.in/moon.mod.json
new file mode 100644
index 00000000..c5d41246
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_hello_exec.in/moon.mod.json
@@ -0,0 +1,4 @@
+{
+  "name": "moonbitlang/hello",
+  "version": "0.1.0"
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_test_hello_exec_fntest.in/.gitignore b/crates/moon/tests/test_cases/moon_test_hello_exec_fntest.in/.gitignore
new file mode 100644
index 00000000..b1283a74
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_hello_exec_fntest.in/.gitignore
@@ -0,0 +1,2 @@
+target/
+.mooncakes/
diff --git a/crates/moon/tests/test_cases/moon_test_hello_exec_fntest.in/lib/hello.mbt b/crates/moon/tests/test_cases/moon_test_hello_exec_fntest.in/lib/hello.mbt
new file mode 100644
index 00000000..b7bd4648
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_hello_exec_fntest.in/lib/hello.mbt
@@ -0,0 +1,7 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
+
+test {
+  println("test in lib/hello.mbt")
+}
diff --git a/crates/moon/tests/test_cases/moon_test_hello_exec_fntest.in/lib/hello_wbtest.mbt b/crates/moon/tests/test_cases/moon_test_hello_exec_fntest.in/lib/hello_wbtest.mbt
new file mode 100644
index 00000000..0f0a481a
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_hello_exec_fntest.in/lib/hello_wbtest.mbt
@@ -0,0 +1,3 @@
+test {
+  println("test in lib/hello_test.mbt")
+}
diff --git a/crates/moon/tests/test_cases/moon_test_hello_exec_fntest.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/moon_test_hello_exec_fntest.in/lib/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_hello_exec_fntest.in/lib/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_test_hello_exec_fntest.in/main/main.mbt b/crates/moon/tests/test_cases/moon_test_hello_exec_fntest.in/main/main.mbt
new file mode 100644
index 00000000..3cd805d6
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_hello_exec_fntest.in/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println("init in main/main.mbt")
+}
diff --git a/crates/moon/tests/test_cases/moon_test_hello_exec_fntest.in/main/moon.pkg.json b/crates/moon/tests/test_cases/moon_test_hello_exec_fntest.in/main/moon.pkg.json
new file mode 100644
index 00000000..02016c81
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_hello_exec_fntest.in/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": [
+    "moonbitlang/hello/lib"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_test_hello_exec_fntest.in/moon.mod.json b/crates/moon/tests/test_cases/moon_test_hello_exec_fntest.in/moon.mod.json
new file mode 100644
index 00000000..c5d41246
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_hello_exec_fntest.in/moon.mod.json
@@ -0,0 +1,4 @@
+{
+  "name": "moonbitlang/hello",
+  "version": "0.1.0"
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_test_hello_lib.in/.gitignore b/crates/moon/tests/test_cases/moon_test_hello_lib.in/.gitignore
new file mode 100644
index 00000000..b1283a74
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_hello_lib.in/.gitignore
@@ -0,0 +1,2 @@
+target/
+.mooncakes/
diff --git a/crates/moon/tests/test_cases/moon_test_hello_lib.in/lib/hello.mbt b/crates/moon/tests/test_cases/moon_test_hello_lib.in/lib/hello.mbt
new file mode 100644
index 00000000..9012592a
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_hello_lib.in/lib/hello.mbt
@@ -0,0 +1,3 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
diff --git a/crates/moon/tests/test_cases/moon_test_hello_lib.in/lib/hello_wbtest.mbt b/crates/moon/tests/test_cases/moon_test_hello_lib.in/lib/hello_wbtest.mbt
new file mode 100644
index 00000000..c9a46222
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_hello_lib.in/lib/hello_wbtest.mbt
@@ -0,0 +1,5 @@
+test {
+  if hello() != "Hello, world!" {
+    abort("")
+  }
+}
diff --git a/crates/moon/tests/test_cases/moon_test_hello_lib.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/moon_test_hello_lib.in/lib/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_hello_lib.in/lib/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_test_hello_lib.in/moon.mod.json b/crates/moon/tests/test_cases/moon_test_hello_lib.in/moon.mod.json
new file mode 100644
index 00000000..c5d41246
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_hello_lib.in/moon.mod.json
@@ -0,0 +1,4 @@
+{
+  "name": "moonbitlang/hello",
+  "version": "0.1.0"
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_test_hello_lib.in/moon.pkg.json b/crates/moon/tests/test_cases/moon_test_hello_lib.in/moon.pkg.json
new file mode 100644
index 00000000..321cad47
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_hello_lib.in/moon.pkg.json
@@ -0,0 +1,5 @@
+{
+    "import": [
+        "moonbitlang/hello/lib"
+    ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_test_hello_lib.in/top.mbt b/crates/moon/tests/test_cases/moon_test_hello_lib.in/top.mbt
new file mode 100644
index 00000000..7a554d06
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_hello_lib.in/top.mbt
@@ -0,0 +1,3 @@
+pub fn greeting() -> Unit {
+  println(@lib.hello())
+}
diff --git a/crates/moon/tests/test_cases/moon_test_no_entry_warning.in/main/main.mbt b/crates/moon/tests/test_cases/moon_test_no_entry_warning.in/main/main.mbt
new file mode 100644
index 00000000..d25cb935
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_no_entry_warning.in/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println(@lib.hello())
+}
diff --git a/crates/moon/tests/test_cases/moon_test_no_entry_warning.in/main/moon.pkg.json b/crates/moon/tests/test_cases/moon_test_no_entry_warning.in/main/moon.pkg.json
new file mode 100644
index 00000000..d6a16d9e
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_no_entry_warning.in/main/moon.pkg.json
@@ -0,0 +1,4 @@
+{
+  "is-main": true,
+  "import": []
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_test_no_entry_warning.in/moon.mod.json b/crates/moon/tests/test_cases/moon_test_no_entry_warning.in/moon.mod.json
new file mode 100644
index 00000000..b5d8b346
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_no_entry_warning.in/moon.mod.json
@@ -0,0 +1,3 @@
+{
+  "name": "moon_new"
+}
diff --git a/crates/moon/tests/test_cases/moon_test_succ.in/lib/hello.mbt b/crates/moon/tests/test_cases/moon_test_succ.in/lib/hello.mbt
new file mode 100644
index 00000000..a7ac2bee
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_succ.in/lib/hello.mbt
@@ -0,0 +1,4 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
+
diff --git a/crates/moon/tests/test_cases/moon_test_succ.in/lib/hello_wbtest.mbt b/crates/moon/tests/test_cases/moon_test_succ.in/lib/hello_wbtest.mbt
new file mode 100644
index 00000000..328a3a20
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_succ.in/lib/hello_wbtest.mbt
@@ -0,0 +1,5 @@
+test {
+  if hello() != "Hello, world!" {
+    raise "not ok"
+  }
+}
diff --git a/crates/moon/tests/test_cases/moon_test_succ.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/moon_test_succ.in/lib/moon.pkg.json
new file mode 100644
index 00000000..9585a087
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_succ.in/lib/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
diff --git a/crates/moon/tests/test_cases/moon_test_succ.in/lib2/hello.mbt b/crates/moon/tests/test_cases/moon_test_succ.in/lib2/hello.mbt
new file mode 100644
index 00000000..4f92d312
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_succ.in/lib2/hello.mbt
@@ -0,0 +1,4 @@
+pub fn hello() -> String {
+  "hello"
+}
+
diff --git a/crates/moon/tests/test_cases/moon_test_succ.in/lib2/hello_wbtest.mbt b/crates/moon/tests/test_cases/moon_test_succ.in/lib2/hello_wbtest.mbt
new file mode 100644
index 00000000..54492bb8
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_succ.in/lib2/hello_wbtest.mbt
@@ -0,0 +1,5 @@
+test {
+  if hello() != "hello" {
+    raise "failed"
+  }
+}
diff --git a/crates/moon/tests/test_cases/moon_test_succ.in/lib2/moon.pkg.json b/crates/moon/tests/test_cases/moon_test_succ.in/lib2/moon.pkg.json
new file mode 100644
index 00000000..9585a087
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_succ.in/lib2/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
diff --git a/crates/moon/tests/test_cases/moon_test_succ.in/lib2/nested/lib.mbt b/crates/moon/tests/test_cases/moon_test_succ.in/lib2/nested/lib.mbt
new file mode 100644
index 00000000..f9852707
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_succ.in/lib2/nested/lib.mbt
@@ -0,0 +1,4 @@
+fn add1(x : Int) -> Int {
+  x + 1
+}
+
diff --git a/crates/moon/tests/test_cases/moon_test_succ.in/lib2/nested/lib_wbtest.mbt b/crates/moon/tests/test_cases/moon_test_succ.in/lib2/nested/lib_wbtest.mbt
new file mode 100644
index 00000000..cb7506fe
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_succ.in/lib2/nested/lib_wbtest.mbt
@@ -0,0 +1,11 @@
+test {
+  if add1(1) != 2 {
+    raise "add1(1) should be 2"
+  }
+}
+
+test {
+  if @lib2.hello() != "hello" {
+    raise "@lib2.hello() should be `hello`"
+  }
+}
diff --git a/crates/moon/tests/test_cases/moon_test_succ.in/lib2/nested/moon.pkg.json b/crates/moon/tests/test_cases/moon_test_succ.in/lib2/nested/moon.pkg.json
new file mode 100644
index 00000000..4bc5e296
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_succ.in/lib2/nested/moon.pkg.json
@@ -0,0 +1,5 @@
+{
+  "import": {
+    "moontest/lib2": ""
+  }
+}
diff --git a/crates/moon/tests/test_cases/moon_test_succ.in/lib3/hello.mbt b/crates/moon/tests/test_cases/moon_test_succ.in/lib3/hello.mbt
new file mode 100644
index 00000000..a7ac2bee
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_succ.in/lib3/hello.mbt
@@ -0,0 +1,4 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
+
diff --git a/crates/moon/tests/test_cases/moon_test_succ.in/lib3/hello_wbtest.mbt b/crates/moon/tests/test_cases/moon_test_succ.in/lib3/hello_wbtest.mbt
new file mode 100644
index 00000000..328a3a20
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_succ.in/lib3/hello_wbtest.mbt
@@ -0,0 +1,5 @@
+test {
+  if hello() != "Hello, world!" {
+    raise "not ok"
+  }
+}
diff --git a/crates/moon/tests/test_cases/moon_test_succ.in/lib3/moon.pkg.json b/crates/moon/tests/test_cases/moon_test_succ.in/lib3/moon.pkg.json
new file mode 100644
index 00000000..9585a087
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_succ.in/lib3/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
diff --git a/crates/moon/tests/test_cases/moon_test_succ.in/lib4/hello.mbt b/crates/moon/tests/test_cases/moon_test_succ.in/lib4/hello.mbt
new file mode 100644
index 00000000..a7ac2bee
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_succ.in/lib4/hello.mbt
@@ -0,0 +1,4 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
+
diff --git a/crates/moon/tests/test_cases/moon_test_succ.in/lib4/hello_wbtest.mbt b/crates/moon/tests/test_cases/moon_test_succ.in/lib4/hello_wbtest.mbt
new file mode 100644
index 00000000..328a3a20
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_succ.in/lib4/hello_wbtest.mbt
@@ -0,0 +1,5 @@
+test {
+  if hello() != "Hello, world!" {
+    raise "not ok"
+  }
+}
diff --git a/crates/moon/tests/test_cases/moon_test_succ.in/lib4/moon.pkg.json b/crates/moon/tests/test_cases/moon_test_succ.in/lib4/moon.pkg.json
new file mode 100644
index 00000000..9585a087
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_succ.in/lib4/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
diff --git a/crates/moon/tests/test_cases/moon_test_succ.in/main/main.mbt b/crates/moon/tests/test_cases/moon_test_succ.in/main/main.mbt
new file mode 100644
index 00000000..d25cb935
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_succ.in/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println(@lib.hello())
+}
diff --git a/crates/moon/tests/test_cases/moon_test_succ.in/main/moon.pkg.json b/crates/moon/tests/test_cases/moon_test_succ.in/main/moon.pkg.json
new file mode 100644
index 00000000..66e2dc7d
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_succ.in/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": {
+    "moontest/lib": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_test_succ.in/moon.mod.json b/crates/moon/tests/test_cases/moon_test_succ.in/moon.mod.json
new file mode 100644
index 00000000..365fb995
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_succ.in/moon.mod.json
@@ -0,0 +1,3 @@
+{
+  "name": "moontest"
+}
diff --git a/crates/moon/tests/test_cases/moon_test_with_local_dep.in/.gitignore b/crates/moon/tests/test_cases/moon_test_with_local_dep.in/.gitignore
new file mode 100644
index 00000000..8bc612e2
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_with_local_dep.in/.gitignore
@@ -0,0 +1,2 @@
+target/
+!.mooncakes/
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_test_with_local_dep.in/lib/hello.mbt b/crates/moon/tests/test_cases/moon_test_with_local_dep.in/lib/hello.mbt
new file mode 100644
index 00000000..9012592a
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_with_local_dep.in/lib/hello.mbt
@@ -0,0 +1,3 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
diff --git a/crates/moon/tests/test_cases/moon_test_with_local_dep.in/lib/hello_wbtest.mbt b/crates/moon/tests/test_cases/moon_test_with_local_dep.in/lib/hello_wbtest.mbt
new file mode 100644
index 00000000..d997755d
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_with_local_dep.in/lib/hello_wbtest.mbt
@@ -0,0 +1 @@
+test {}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_test_with_local_dep.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/moon_test_with_local_dep.in/lib/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_with_local_dep.in/lib/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_test_with_local_dep.in/main/main.mbt b/crates/moon/tests/test_cases/moon_test_with_local_dep.in/main/main.mbt
new file mode 100644
index 00000000..e3171d7f
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_with_local_dep.in/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  @mooncake.greeting()
+}
diff --git a/crates/moon/tests/test_cases/moon_test_with_local_dep.in/main/moon.pkg.json b/crates/moon/tests/test_cases/moon_test_with_local_dep.in/main/moon.pkg.json
new file mode 100644
index 00000000..93af9a1c
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_with_local_dep.in/main/moon.pkg.json
@@ -0,0 +1,7 @@
+{
+  "is-main": true,
+  "import": {
+    "hello31/lib": "",
+    "lijunchen/mooncake": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_test_with_local_dep.in/mods/lijunchen/mooncake/lib/hello.mbt b/crates/moon/tests/test_cases/moon_test_with_local_dep.in/mods/lijunchen/mooncake/lib/hello.mbt
new file mode 100644
index 00000000..9012592a
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_with_local_dep.in/mods/lijunchen/mooncake/lib/hello.mbt
@@ -0,0 +1,3 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
diff --git a/crates/moon/tests/test_cases/moon_test_with_local_dep.in/mods/lijunchen/mooncake/lib/hello_wbtest.mbt b/crates/moon/tests/test_cases/moon_test_with_local_dep.in/mods/lijunchen/mooncake/lib/hello_wbtest.mbt
new file mode 100644
index 00000000..c9a46222
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_with_local_dep.in/mods/lijunchen/mooncake/lib/hello_wbtest.mbt
@@ -0,0 +1,5 @@
+test {
+  if hello() != "Hello, world!" {
+    abort("")
+  }
+}
diff --git a/crates/moon/tests/test_cases/moon_test_with_local_dep.in/mods/lijunchen/mooncake/lib/moon.pkg.json b/crates/moon/tests/test_cases/moon_test_with_local_dep.in/mods/lijunchen/mooncake/lib/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_with_local_dep.in/mods/lijunchen/mooncake/lib/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_test_with_local_dep.in/mods/lijunchen/mooncake/moon.mod.json b/crates/moon/tests/test_cases/moon_test_with_local_dep.in/mods/lijunchen/mooncake/moon.mod.json
new file mode 100644
index 00000000..2b1b9ddf
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_with_local_dep.in/mods/lijunchen/mooncake/moon.mod.json
@@ -0,0 +1,4 @@
+{
+  "name": "lijunchen/mooncake",
+  "version": "0.1.0"
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_test_with_local_dep.in/mods/lijunchen/mooncake/moon.pkg.json b/crates/moon/tests/test_cases/moon_test_with_local_dep.in/mods/lijunchen/mooncake/moon.pkg.json
new file mode 100644
index 00000000..031728e6
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_with_local_dep.in/mods/lijunchen/mooncake/moon.pkg.json
@@ -0,0 +1,5 @@
+{
+  "import": [
+    "lijunchen/mooncake/lib"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/moon_test_with_local_dep.in/mods/lijunchen/mooncake/top.mbt b/crates/moon/tests/test_cases/moon_test_with_local_dep.in/mods/lijunchen/mooncake/top.mbt
new file mode 100644
index 00000000..7a554d06
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_with_local_dep.in/mods/lijunchen/mooncake/top.mbt
@@ -0,0 +1,3 @@
+pub fn greeting() -> Unit {
+  println(@lib.hello())
+}
diff --git a/crates/moon/tests/test_cases/moon_test_with_local_dep.in/moon.mod.json b/crates/moon/tests/test_cases/moon_test_with_local_dep.in/moon.mod.json
new file mode 100644
index 00000000..bf0773ce
--- /dev/null
+++ b/crates/moon/tests/test_cases/moon_test_with_local_dep.in/moon.mod.json
@@ -0,0 +1,8 @@
+{
+  "name": "hello31",
+  "deps": {
+    "lijunchen/mooncake": {
+      "path": "./mods/lijunchen/mooncake"
+    }
+  }
+}
diff --git a/crates/moon/tests/test_cases/multidimensional_arrays.in/README.md b/crates/moon/tests/test_cases/multidimensional_arrays.in/README.md
new file mode 100644
index 00000000..f64e85ce
--- /dev/null
+++ b/crates/moon/tests/test_cases/multidimensional_arrays.in/README.md
@@ -0,0 +1,3 @@
+## Multidimensional Arrays
+
+Use the [triangle problem](https://leetcode.com/problems/triangle/) to demonstrate how to use Moonbit's multidimensional arrays.
diff --git a/crates/moon/tests/test_cases/multidimensional_arrays.in/lib/arrays.mbt b/crates/moon/tests/test_cases/multidimensional_arrays.in/lib/arrays.mbt
new file mode 100644
index 00000000..1747c80e
--- /dev/null
+++ b/crates/moon/tests/test_cases/multidimensional_arrays.in/lib/arrays.mbt
@@ -0,0 +1,40 @@
+fn min(a : Int, b : Int) -> Int {
+  if a > b {
+    return b
+  } else {
+    return a
+  }
+}
+
+/// Calculate the minimum path sum through a triangle of integers.
+///
+/// Given a triangle represented as a list of lists of integers, where each list
+/// corresponds to a row of the triangle, this function calculates the minimum
+/// path sum from the top to the bottom of the triangle by moving only to adjacent
+/// numbers on the row below.
+///
+/// @param {Array[Array[Int]]} triangle - A 2D array representing the triangle of integers.
+/// @return {Int} - The minimum path sum through the triangle.
+///
+/// The function uses a recursive approach with dynamic programming to calculate
+/// the minimum path sum. It starts from the top of the triangle and recursively
+/// calculates the minimum path sum for each possible path from the current position
+/// to the bottom row. The `helper` function is used for the recursive calculation.
+pub fn minPathSum(triangle : Array[Array[Int]]) -> Int {
+  fn helper(row : Int, col : Int) -> Int {
+    if row == triangle.length() {
+      return 0
+    }
+    let next1 = helper(row + 1, col)
+    let next2 = if col < row {
+      helper(row + 1, col + 1)
+    } else {
+      2147483647
+    }
+    let cur = triangle[row][col]
+    return cur + min(next1, next2)
+  }
+
+  helper(0, 0)
+}
+
diff --git a/crates/moon/tests/test_cases/multidimensional_arrays.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/multidimensional_arrays.in/lib/moon.pkg.json
new file mode 100644
index 00000000..9585a087
--- /dev/null
+++ b/crates/moon/tests/test_cases/multidimensional_arrays.in/lib/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
diff --git a/crates/moon/tests/test_cases/multidimensional_arrays.in/main/main.mbt b/crates/moon/tests/test_cases/multidimensional_arrays.in/main/main.mbt
new file mode 100644
index 00000000..0797b550
--- /dev/null
+++ b/crates/moon/tests/test_cases/multidimensional_arrays.in/main/main.mbt
@@ -0,0 +1,5 @@
+fn main {
+  let triangle : Array[Array[Int]] = [[2], [3, 4], [6, 5, 7], [4, 1, 8, 3]]
+  let result = @lib.minPathSum(triangle)
+  println(result) // prints 11
+}
diff --git a/crates/moon/tests/test_cases/multidimensional_arrays.in/main/moon.pkg.json b/crates/moon/tests/test_cases/multidimensional_arrays.in/main/moon.pkg.json
new file mode 100644
index 00000000..94d52132
--- /dev/null
+++ b/crates/moon/tests/test_cases/multidimensional_arrays.in/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": {
+    "multidimensional_arrays/lib": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/multidimensional_arrays.in/moon.mod.json b/crates/moon/tests/test_cases/multidimensional_arrays.in/moon.mod.json
new file mode 100644
index 00000000..7cc613ed
--- /dev/null
+++ b/crates/moon/tests/test_cases/multidimensional_arrays.in/moon.mod.json
@@ -0,0 +1,3 @@
+{
+  "name": "multidimensional_arrays"
+}
diff --git a/crates/moon/tests/test_cases/need_link.in/.gitignore b/crates/moon/tests/test_cases/need_link.in/.gitignore
new file mode 100644
index 00000000..b1283a74
--- /dev/null
+++ b/crates/moon/tests/test_cases/need_link.in/.gitignore
@@ -0,0 +1,2 @@
+target/
+.mooncakes/
diff --git a/crates/moon/tests/test_cases/need_link.in/README.md b/crates/moon/tests/test_cases/need_link.in/README.md
new file mode 100644
index 00000000..ae00983f
--- /dev/null
+++ b/crates/moon/tests/test_cases/need_link.in/README.md
@@ -0,0 +1 @@
+# username/hello
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/need_link.in/lib/hello.mbt b/crates/moon/tests/test_cases/need_link.in/lib/hello.mbt
new file mode 100644
index 00000000..9012592a
--- /dev/null
+++ b/crates/moon/tests/test_cases/need_link.in/lib/hello.mbt
@@ -0,0 +1,3 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
diff --git a/crates/moon/tests/test_cases/need_link.in/lib/hello_wbtest.mbt b/crates/moon/tests/test_cases/need_link.in/lib/hello_wbtest.mbt
new file mode 100644
index 00000000..64f26429
--- /dev/null
+++ b/crates/moon/tests/test_cases/need_link.in/lib/hello_wbtest.mbt
@@ -0,0 +1,5 @@
+test "hello" {
+  if hello() != "Hello, world!" {
+    return Err("hello() != \"Hello, world!\"")
+  }
+}
diff --git a/crates/moon/tests/test_cases/need_link.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/need_link.in/lib/moon.pkg.json
new file mode 100644
index 00000000..280af610
--- /dev/null
+++ b/crates/moon/tests/test_cases/need_link.in/lib/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "link": true
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/need_link.in/main/main.mbt b/crates/moon/tests/test_cases/need_link.in/main/main.mbt
new file mode 100644
index 00000000..d25cb935
--- /dev/null
+++ b/crates/moon/tests/test_cases/need_link.in/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println(@lib.hello())
+}
diff --git a/crates/moon/tests/test_cases/need_link.in/main/moon.pkg.json b/crates/moon/tests/test_cases/need_link.in/main/moon.pkg.json
new file mode 100644
index 00000000..48783525
--- /dev/null
+++ b/crates/moon/tests/test_cases/need_link.in/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": [
+    "username/hello/lib"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/need_link.in/moon.mod.json b/crates/moon/tests/test_cases/need_link.in/moon.mod.json
new file mode 100644
index 00000000..80554ae2
--- /dev/null
+++ b/crates/moon/tests/test_cases/need_link.in/moon.mod.json
@@ -0,0 +1,9 @@
+{
+  "name": "username/hello",
+  "version": "0.1.0",
+  "readme": "README.md",
+  "repository": "",
+  "license": "",
+  "keywords": [],
+  "description": ""
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/no_block_params.in/.gitignore b/crates/moon/tests/test_cases/no_block_params.in/.gitignore
new file mode 100644
index 00000000..b1283a74
--- /dev/null
+++ b/crates/moon/tests/test_cases/no_block_params.in/.gitignore
@@ -0,0 +1,2 @@
+target/
+.mooncakes/
diff --git a/crates/moon/tests/test_cases/no_block_params.in/README.md b/crates/moon/tests/test_cases/no_block_params.in/README.md
new file mode 100644
index 00000000..ae00983f
--- /dev/null
+++ b/crates/moon/tests/test_cases/no_block_params.in/README.md
@@ -0,0 +1 @@
+# username/hello
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/no_block_params.in/lib/hello.mbt b/crates/moon/tests/test_cases/no_block_params.in/lib/hello.mbt
new file mode 100644
index 00000000..9012592a
--- /dev/null
+++ b/crates/moon/tests/test_cases/no_block_params.in/lib/hello.mbt
@@ -0,0 +1,3 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
diff --git a/crates/moon/tests/test_cases/no_block_params.in/lib/hello_wbtest.mbt b/crates/moon/tests/test_cases/no_block_params.in/lib/hello_wbtest.mbt
new file mode 100644
index 00000000..64f26429
--- /dev/null
+++ b/crates/moon/tests/test_cases/no_block_params.in/lib/hello_wbtest.mbt
@@ -0,0 +1,5 @@
+test "hello" {
+  if hello() != "Hello, world!" {
+    return Err("hello() != \"Hello, world!\"")
+  }
+}
diff --git a/crates/moon/tests/test_cases/no_block_params.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/no_block_params.in/lib/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/no_block_params.in/lib/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/no_block_params.in/main/main.mbt b/crates/moon/tests/test_cases/no_block_params.in/main/main.mbt
new file mode 100644
index 00000000..d25cb935
--- /dev/null
+++ b/crates/moon/tests/test_cases/no_block_params.in/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println(@lib.hello())
+}
diff --git a/crates/moon/tests/test_cases/no_block_params.in/main/moon.pkg.json b/crates/moon/tests/test_cases/no_block_params.in/main/moon.pkg.json
new file mode 100644
index 00000000..a96f0f3a
--- /dev/null
+++ b/crates/moon/tests/test_cases/no_block_params.in/main/moon.pkg.json
@@ -0,0 +1,18 @@
+{
+  "is-main": true,
+  "import": [
+    "username/hello/lib"
+  ],
+  "link": {
+    "wasm": {
+      "flags": [
+        "-no-block-params"
+      ]
+    },
+    "wasm-gc": {
+      "flags": [
+        "-no-block-params"
+      ]
+    }
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/no_block_params.in/moon.mod.json b/crates/moon/tests/test_cases/no_block_params.in/moon.mod.json
new file mode 100644
index 00000000..80554ae2
--- /dev/null
+++ b/crates/moon/tests/test_cases/no_block_params.in/moon.mod.json
@@ -0,0 +1,9 @@
+{
+  "name": "username/hello",
+  "version": "0.1.0",
+  "readme": "README.md",
+  "repository": "",
+  "license": "",
+  "keywords": [],
+  "description": ""
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/only_update_expect.in/.gitignore b/crates/moon/tests/test_cases/only_update_expect.in/.gitignore
new file mode 100644
index 00000000..b1283a74
--- /dev/null
+++ b/crates/moon/tests/test_cases/only_update_expect.in/.gitignore
@@ -0,0 +1,2 @@
+target/
+.mooncakes/
diff --git a/crates/moon/tests/test_cases/only_update_expect.in/README.md b/crates/moon/tests/test_cases/only_update_expect.in/README.md
new file mode 100644
index 00000000..ae00983f
--- /dev/null
+++ b/crates/moon/tests/test_cases/only_update_expect.in/README.md
@@ -0,0 +1 @@
+# username/hello
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/only_update_expect.in/lib/hello.mbt b/crates/moon/tests/test_cases/only_update_expect.in/lib/hello.mbt
new file mode 100644
index 00000000..f649d11b
--- /dev/null
+++ b/crates/moon/tests/test_cases/only_update_expect.in/lib/hello.mbt
@@ -0,0 +1,3 @@
+test {
+  abort("")
+}
diff --git a/crates/moon/tests/test_cases/only_update_expect.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/only_update_expect.in/lib/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/only_update_expect.in/lib/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/only_update_expect.in/main/main.mbt b/crates/moon/tests/test_cases/only_update_expect.in/main/main.mbt
new file mode 100644
index 00000000..2442723f
--- /dev/null
+++ b/crates/moon/tests/test_cases/only_update_expect.in/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println("main")
+}
diff --git a/crates/moon/tests/test_cases/only_update_expect.in/main/moon.pkg.json b/crates/moon/tests/test_cases/only_update_expect.in/main/moon.pkg.json
new file mode 100644
index 00000000..48783525
--- /dev/null
+++ b/crates/moon/tests/test_cases/only_update_expect.in/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": [
+    "username/hello/lib"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/only_update_expect.in/moon.mod.json b/crates/moon/tests/test_cases/only_update_expect.in/moon.mod.json
new file mode 100644
index 00000000..80554ae2
--- /dev/null
+++ b/crates/moon/tests/test_cases/only_update_expect.in/moon.mod.json
@@ -0,0 +1,9 @@
+{
+  "name": "username/hello",
+  "version": "0.1.0",
+  "readme": "README.md",
+  "repository": "",
+  "license": "",
+  "keywords": [],
+  "description": ""
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/output-format.in/lib/hello.mbt b/crates/moon/tests/test_cases/output-format.in/lib/hello.mbt
new file mode 100644
index 00000000..a7ac2bee
--- /dev/null
+++ b/crates/moon/tests/test_cases/output-format.in/lib/hello.mbt
@@ -0,0 +1,4 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
+
diff --git a/crates/moon/tests/test_cases/output-format.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/output-format.in/lib/moon.pkg.json
new file mode 100644
index 00000000..0967ef42
--- /dev/null
+++ b/crates/moon/tests/test_cases/output-format.in/lib/moon.pkg.json
@@ -0,0 +1 @@
+{}
diff --git a/crates/moon/tests/test_cases/output-format.in/main/main.mbt b/crates/moon/tests/test_cases/output-format.in/main/main.mbt
new file mode 100644
index 00000000..d25cb935
--- /dev/null
+++ b/crates/moon/tests/test_cases/output-format.in/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println(@lib.hello())
+}
diff --git a/crates/moon/tests/test_cases/output-format.in/main/moon.pkg.json b/crates/moon/tests/test_cases/output-format.in/main/moon.pkg.json
new file mode 100644
index 00000000..0dccc0db
--- /dev/null
+++ b/crates/moon/tests/test_cases/output-format.in/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": {
+    "hello/lib": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/output-format.in/moon.mod.json b/crates/moon/tests/test_cases/output-format.in/moon.mod.json
new file mode 100644
index 00000000..61113747
--- /dev/null
+++ b/crates/moon/tests/test_cases/output-format.in/moon.mod.json
@@ -0,0 +1,3 @@
+{
+  "name": "hello"
+}
diff --git a/crates/moon/tests/test_cases/palindrome_string.in/README.md b/crates/moon/tests/test_cases/palindrome_string.in/README.md
new file mode 100644
index 00000000..4c3d39ee
--- /dev/null
+++ b/crates/moon/tests/test_cases/palindrome_string.in/README.md
@@ -0,0 +1,3 @@
+## Palindrome string
+
+Use the palindrome question to demonstrate Moonbit's string iteration.
diff --git a/crates/moon/tests/test_cases/palindrome_string.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/palindrome_string.in/lib/moon.pkg.json
new file mode 100644
index 00000000..9585a087
--- /dev/null
+++ b/crates/moon/tests/test_cases/palindrome_string.in/lib/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
diff --git a/crates/moon/tests/test_cases/palindrome_string.in/lib/str_iter.mbt b/crates/moon/tests/test_cases/palindrome_string.in/lib/str_iter.mbt
new file mode 100644
index 00000000..f5ad2577
--- /dev/null
+++ b/crates/moon/tests/test_cases/palindrome_string.in/lib/str_iter.mbt
@@ -0,0 +1,18 @@
+/// Check if a given string is a palindrome.
+///
+/// This function takes a string as input and checks whether it is a palindrome or not.
+/// A palindrome is a string that reads the same forwards and backwards.
+///
+/// @param {String} chars - The input string to be checked for palindrome.
+/// @return {Bool} Returns `true` if the input string is a palindrome, otherwise `false`.
+pub fn is_palindrome(chars : String) -> Bool {
+  let n = chars.length()
+  let mut i = 0
+  while i < n / 2 {
+    if chars[i] != chars[n - i - 1] {
+      return false
+    }
+    i = i + 1
+  }
+  return true
+}
diff --git a/crates/moon/tests/test_cases/palindrome_string.in/main/main.mbt b/crates/moon/tests/test_cases/palindrome_string.in/main/main.mbt
new file mode 100644
index 00000000..4785d042
--- /dev/null
+++ b/crates/moon/tests/test_cases/palindrome_string.in/main/main.mbt
@@ -0,0 +1,12 @@
+fn main {
+  let test1 = "abc"
+  let test2 = "aba"
+  let a = @lib.is_palindrome(test1)
+  let b = @lib.is_palindrome(test2)
+  if a {
+    println(test1) // not print
+  }
+  if b {
+    println(test2) // print "aba"
+  }
+}
diff --git a/crates/moon/tests/test_cases/palindrome_string.in/main/moon.pkg.json b/crates/moon/tests/test_cases/palindrome_string.in/main/moon.pkg.json
new file mode 100644
index 00000000..6852a912
--- /dev/null
+++ b/crates/moon/tests/test_cases/palindrome_string.in/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": {
+    "palindrome_string/lib": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/palindrome_string.in/moon.mod.json b/crates/moon/tests/test_cases/palindrome_string.in/moon.mod.json
new file mode 100644
index 00000000..84c360fa
--- /dev/null
+++ b/crates/moon/tests/test_cases/palindrome_string.in/moon.mod.json
@@ -0,0 +1,3 @@
+{
+  "name": "palindrome_string"
+}
diff --git a/crates/moon/tests/test_cases/panic.in/.gitignore b/crates/moon/tests/test_cases/panic.in/.gitignore
new file mode 100644
index 00000000..b1283a74
--- /dev/null
+++ b/crates/moon/tests/test_cases/panic.in/.gitignore
@@ -0,0 +1,2 @@
+target/
+.mooncakes/
diff --git a/crates/moon/tests/test_cases/panic.in/README.md b/crates/moon/tests/test_cases/panic.in/README.md
new file mode 100644
index 00000000..ae00983f
--- /dev/null
+++ b/crates/moon/tests/test_cases/panic.in/README.md
@@ -0,0 +1 @@
+# username/hello
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/panic.in/lib/hello.mbt b/crates/moon/tests/test_cases/panic.in/lib/hello.mbt
new file mode 100644
index 00000000..9012592a
--- /dev/null
+++ b/crates/moon/tests/test_cases/panic.in/lib/hello.mbt
@@ -0,0 +1,3 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
diff --git a/crates/moon/tests/test_cases/panic.in/lib/hello_wbtest.mbt b/crates/moon/tests/test_cases/panic.in/lib/hello_wbtest.mbt
new file mode 100644
index 00000000..a3ca2b95
--- /dev/null
+++ b/crates/moon/tests/test_cases/panic.in/lib/hello_wbtest.mbt
@@ -0,0 +1,9 @@
+fn panic() -> Unit = "%panic"
+
+test "panic" {
+  ()
+}
+
+test "panic_xxx" {
+  panic()
+}
diff --git a/crates/moon/tests/test_cases/panic.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/panic.in/lib/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/panic.in/lib/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/panic.in/main/main.mbt b/crates/moon/tests/test_cases/panic.in/main/main.mbt
new file mode 100644
index 00000000..d25cb935
--- /dev/null
+++ b/crates/moon/tests/test_cases/panic.in/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println(@lib.hello())
+}
diff --git a/crates/moon/tests/test_cases/panic.in/main/moon.pkg.json b/crates/moon/tests/test_cases/panic.in/main/moon.pkg.json
new file mode 100644
index 00000000..48783525
--- /dev/null
+++ b/crates/moon/tests/test_cases/panic.in/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": [
+    "username/hello/lib"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/panic.in/moon.mod.json b/crates/moon/tests/test_cases/panic.in/moon.mod.json
new file mode 100644
index 00000000..80554ae2
--- /dev/null
+++ b/crates/moon/tests/test_cases/panic.in/moon.mod.json
@@ -0,0 +1,9 @@
+{
+  "name": "username/hello",
+  "version": "0.1.0",
+  "readme": "README.md",
+  "repository": "",
+  "license": "",
+  "keywords": [],
+  "description": ""
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/render_no_location.in/lib/hello.mbt b/crates/moon/tests/test_cases/render_no_location.in/lib/hello.mbt
new file mode 100644
index 00000000..a7ac2bee
--- /dev/null
+++ b/crates/moon/tests/test_cases/render_no_location.in/lib/hello.mbt
@@ -0,0 +1,4 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
+
diff --git a/crates/moon/tests/test_cases/render_no_location.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/render_no_location.in/lib/moon.pkg.json
new file mode 100644
index 00000000..9585a087
--- /dev/null
+++ b/crates/moon/tests/test_cases/render_no_location.in/lib/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
diff --git a/crates/moon/tests/test_cases/render_no_location.in/main/main.mbt b/crates/moon/tests/test_cases/render_no_location.in/main/main.mbt
new file mode 100644
index 00000000..e69de29b
diff --git a/crates/moon/tests/test_cases/render_no_location.in/main/moon.pkg.json b/crates/moon/tests/test_cases/render_no_location.in/main/moon.pkg.json
new file mode 100644
index 00000000..4343a4ef
--- /dev/null
+++ b/crates/moon/tests/test_cases/render_no_location.in/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": {
+    "moon_new/lib": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/render_no_location.in/moon.mod.json b/crates/moon/tests/test_cases/render_no_location.in/moon.mod.json
new file mode 100644
index 00000000..b5d8b346
--- /dev/null
+++ b/crates/moon/tests/test_cases/render_no_location.in/moon.mod.json
@@ -0,0 +1,3 @@
+{
+  "name": "moon_new"
+}
diff --git a/crates/moon/tests/test_cases/run_single_mbt_file.in/a/b/c/.gitkeep b/crates/moon/tests/test_cases/run_single_mbt_file.in/a/b/c/.gitkeep
new file mode 100644
index 00000000..e69de29b
diff --git a/crates/moon/tests/test_cases/run_single_mbt_file.in/a/b/single.mbt b/crates/moon/tests/test_cases/run_single_mbt_file.in/a/b/single.mbt
new file mode 100644
index 00000000..f55f3f18
--- /dev/null
+++ b/crates/moon/tests/test_cases/run_single_mbt_file.in/a/b/single.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println("I am OK")
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/simple-pkg-A-001.in/A/lib.mbt b/crates/moon/tests/test_cases/simple-pkg-A-001.in/A/lib.mbt
new file mode 100644
index 00000000..0c8ba57d
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-A-001.in/A/lib.mbt
@@ -0,0 +1,3 @@
+pub fn f() -> Unit {
+  println("A")
+}
diff --git a/crates/moon/tests/test_cases/simple-pkg-A-001.in/A/moon.pkg.json b/crates/moon/tests/test_cases/simple-pkg-A-001.in/A/moon.pkg.json
new file mode 100644
index 00000000..72eb22fe
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-A-001.in/A/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/simple-pkg-A-001.in/main/main.mbt b/crates/moon/tests/test_cases/simple-pkg-A-001.in/main/main.mbt
new file mode 100644
index 00000000..d45bceaf
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-A-001.in/main/main.mbt
@@ -0,0 +1,4 @@
+fn main {
+  @A.f()
+  println("main")
+}
diff --git a/crates/moon/tests/test_cases/simple-pkg-A-001.in/main/moon.pkg.json b/crates/moon/tests/test_cases/simple-pkg-A-001.in/main/moon.pkg.json
new file mode 100644
index 00000000..f6aaa8fe
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-A-001.in/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": {
+    "hello/A": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/simple-pkg-A-001.in/moon.mod.json b/crates/moon/tests/test_cases/simple-pkg-A-001.in/moon.mod.json
new file mode 100644
index 00000000..61113747
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-A-001.in/moon.mod.json
@@ -0,0 +1,3 @@
+{
+  "name": "hello"
+}
diff --git a/crates/moon/tests/test_cases/simple-pkg-A-002.in/A/lib.mbt b/crates/moon/tests/test_cases/simple-pkg-A-002.in/A/lib.mbt
new file mode 100644
index 00000000..0c8ba57d
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-A-002.in/A/lib.mbt
@@ -0,0 +1,3 @@
+pub fn f() -> Unit {
+  println("A")
+}
diff --git a/crates/moon/tests/test_cases/simple-pkg-A-002.in/A/moon.pkg.json b/crates/moon/tests/test_cases/simple-pkg-A-002.in/A/moon.pkg.json
new file mode 100644
index 00000000..9585a087
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-A-002.in/A/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
diff --git a/crates/moon/tests/test_cases/simple-pkg-A-002.in/main/main.mbt b/crates/moon/tests/test_cases/simple-pkg-A-002.in/main/main.mbt
new file mode 100644
index 00000000..d45bceaf
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-A-002.in/main/main.mbt
@@ -0,0 +1,4 @@
+fn main {
+  @A.f()
+  println("main")
+}
diff --git a/crates/moon/tests/test_cases/simple-pkg-A-002.in/main/moon.pkg.json b/crates/moon/tests/test_cases/simple-pkg-A-002.in/main/moon.pkg.json
new file mode 100644
index 00000000..f6aaa8fe
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-A-002.in/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": {
+    "hello/A": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/simple-pkg-A-002.in/moon.mod.json b/crates/moon/tests/test_cases/simple-pkg-A-002.in/moon.mod.json
new file mode 100644
index 00000000..61113747
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-A-002.in/moon.mod.json
@@ -0,0 +1,3 @@
+{
+  "name": "hello"
+}
diff --git a/crates/moon/tests/test_cases/simple-pkg-A-003.in/A/lib.mbt b/crates/moon/tests/test_cases/simple-pkg-A-003.in/A/lib.mbt
new file mode 100644
index 00000000..0c8ba57d
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-A-003.in/A/lib.mbt
@@ -0,0 +1,3 @@
+pub fn f() -> Unit {
+  println("A")
+}
diff --git a/crates/moon/tests/test_cases/simple-pkg-A-003.in/A/moon.pkg.json b/crates/moon/tests/test_cases/simple-pkg-A-003.in/A/moon.pkg.json
new file mode 100644
index 00000000..9585a087
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-A-003.in/A/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
diff --git a/crates/moon/tests/test_cases/simple-pkg-A-003.in/main/main.mbt b/crates/moon/tests/test_cases/simple-pkg-A-003.in/main/main.mbt
new file mode 100644
index 00000000..cd80519f
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-A-003.in/main/main.mbt
@@ -0,0 +1,4 @@
+fn main {
+  @B.f()
+  println("main")
+}
diff --git a/crates/moon/tests/test_cases/simple-pkg-A-003.in/main/moon.pkg.json b/crates/moon/tests/test_cases/simple-pkg-A-003.in/main/moon.pkg.json
new file mode 100644
index 00000000..0c5a0512
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-A-003.in/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": {
+    "hello/A": "B"
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/simple-pkg-A-003.in/moon.mod.json b/crates/moon/tests/test_cases/simple-pkg-A-003.in/moon.mod.json
new file mode 100644
index 00000000..61113747
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-A-003.in/moon.mod.json
@@ -0,0 +1,3 @@
+{
+  "name": "hello"
+}
diff --git a/crates/moon/tests/test_cases/simple-pkg-A-004.in/lib/A/lib.mbt b/crates/moon/tests/test_cases/simple-pkg-A-004.in/lib/A/lib.mbt
new file mode 100644
index 00000000..0c8ba57d
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-A-004.in/lib/A/lib.mbt
@@ -0,0 +1,3 @@
+pub fn f() -> Unit {
+  println("A")
+}
diff --git a/crates/moon/tests/test_cases/simple-pkg-A-004.in/lib/A/moon.pkg.json b/crates/moon/tests/test_cases/simple-pkg-A-004.in/lib/A/moon.pkg.json
new file mode 100644
index 00000000..72eb22fe
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-A-004.in/lib/A/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/simple-pkg-A-004.in/main/main.mbt b/crates/moon/tests/test_cases/simple-pkg-A-004.in/main/main.mbt
new file mode 100644
index 00000000..d45bceaf
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-A-004.in/main/main.mbt
@@ -0,0 +1,4 @@
+fn main {
+  @A.f()
+  println("main")
+}
diff --git a/crates/moon/tests/test_cases/simple-pkg-A-004.in/main/moon.pkg.json b/crates/moon/tests/test_cases/simple-pkg-A-004.in/main/moon.pkg.json
new file mode 100644
index 00000000..30bde418
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-A-004.in/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": {
+    "hello/lib/A": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/simple-pkg-A-004.in/moon.mod.json b/crates/moon/tests/test_cases/simple-pkg-A-004.in/moon.mod.json
new file mode 100644
index 00000000..61113747
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-A-004.in/moon.mod.json
@@ -0,0 +1,3 @@
+{
+  "name": "hello"
+}
diff --git a/crates/moon/tests/test_cases/simple-pkg-A-005.in/lib/A/lib.mbt b/crates/moon/tests/test_cases/simple-pkg-A-005.in/lib/A/lib.mbt
new file mode 100644
index 00000000..0c8ba57d
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-A-005.in/lib/A/lib.mbt
@@ -0,0 +1,3 @@
+pub fn f() -> Unit {
+  println("A")
+}
diff --git a/crates/moon/tests/test_cases/simple-pkg-A-005.in/lib/A/moon.pkg.json b/crates/moon/tests/test_cases/simple-pkg-A-005.in/lib/A/moon.pkg.json
new file mode 100644
index 00000000..9585a087
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-A-005.in/lib/A/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
diff --git a/crates/moon/tests/test_cases/simple-pkg-A-005.in/main/main.mbt b/crates/moon/tests/test_cases/simple-pkg-A-005.in/main/main.mbt
new file mode 100644
index 00000000..cd80519f
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-A-005.in/main/main.mbt
@@ -0,0 +1,4 @@
+fn main {
+  @B.f()
+  println("main")
+}
diff --git a/crates/moon/tests/test_cases/simple-pkg-A-005.in/main/moon.pkg.json b/crates/moon/tests/test_cases/simple-pkg-A-005.in/main/moon.pkg.json
new file mode 100644
index 00000000..820a9d00
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-A-005.in/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": {
+    "hello/lib/A": "B"
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/simple-pkg-A-005.in/moon.mod.json b/crates/moon/tests/test_cases/simple-pkg-A-005.in/moon.mod.json
new file mode 100644
index 00000000..61113747
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-A-005.in/moon.mod.json
@@ -0,0 +1,3 @@
+{
+  "name": "hello"
+}
diff --git a/crates/moon/tests/test_cases/simple-pkg-A-006.in/main/main.mbt b/crates/moon/tests/test_cases/simple-pkg-A-006.in/main/main.mbt
new file mode 100644
index 00000000..2442723f
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-A-006.in/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println("main")
+}
diff --git a/crates/moon/tests/test_cases/simple-pkg-A-006.in/main/moon.pkg.json b/crates/moon/tests/test_cases/simple-pkg-A-006.in/main/moon.pkg.json
new file mode 100644
index 00000000..fcc86bad
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-A-006.in/main/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "is-main": true
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/simple-pkg-A-006.in/moon.mod.json b/crates/moon/tests/test_cases/simple-pkg-A-006.in/moon.mod.json
new file mode 100644
index 00000000..61113747
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-A-006.in/moon.mod.json
@@ -0,0 +1,3 @@
+{
+  "name": "hello"
+}
diff --git a/crates/moon/tests/test_cases/simple-pkg-AB-001.in/A/lib.mbt b/crates/moon/tests/test_cases/simple-pkg-AB-001.in/A/lib.mbt
new file mode 100644
index 00000000..0c8ba57d
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-AB-001.in/A/lib.mbt
@@ -0,0 +1,3 @@
+pub fn f() -> Unit {
+  println("A")
+}
diff --git a/crates/moon/tests/test_cases/simple-pkg-AB-001.in/A/moon.pkg.json b/crates/moon/tests/test_cases/simple-pkg-AB-001.in/A/moon.pkg.json
new file mode 100644
index 00000000..72eb22fe
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-AB-001.in/A/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/simple-pkg-AB-001.in/B/lib.mbt b/crates/moon/tests/test_cases/simple-pkg-AB-001.in/B/lib.mbt
new file mode 100644
index 00000000..c1721c99
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-AB-001.in/B/lib.mbt
@@ -0,0 +1,3 @@
+pub fn f() -> Unit {
+  println("B")
+}
diff --git a/crates/moon/tests/test_cases/simple-pkg-AB-001.in/B/moon.pkg.json b/crates/moon/tests/test_cases/simple-pkg-AB-001.in/B/moon.pkg.json
new file mode 100644
index 00000000..72eb22fe
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-AB-001.in/B/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/simple-pkg-AB-001.in/main/main.mbt b/crates/moon/tests/test_cases/simple-pkg-AB-001.in/main/main.mbt
new file mode 100644
index 00000000..737e3785
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-AB-001.in/main/main.mbt
@@ -0,0 +1,5 @@
+fn main {
+  @A.f()
+  @B.f()
+  println("main")
+}
diff --git a/crates/moon/tests/test_cases/simple-pkg-AB-001.in/main/moon.pkg.json b/crates/moon/tests/test_cases/simple-pkg-AB-001.in/main/moon.pkg.json
new file mode 100644
index 00000000..f65683f6
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-AB-001.in/main/moon.pkg.json
@@ -0,0 +1,7 @@
+{
+  "is-main": true,
+  "import": {
+    "hello/B": "",
+    "hello/A": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/simple-pkg-AB-001.in/moon.mod.json b/crates/moon/tests/test_cases/simple-pkg-AB-001.in/moon.mod.json
new file mode 100644
index 00000000..61113747
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-AB-001.in/moon.mod.json
@@ -0,0 +1,3 @@
+{
+  "name": "hello"
+}
diff --git a/crates/moon/tests/test_cases/simple-pkg-AB-002.in/A/lib.mbt b/crates/moon/tests/test_cases/simple-pkg-AB-002.in/A/lib.mbt
new file mode 100644
index 00000000..0c8ba57d
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-AB-002.in/A/lib.mbt
@@ -0,0 +1,3 @@
+pub fn f() -> Unit {
+  println("A")
+}
diff --git a/crates/moon/tests/test_cases/simple-pkg-AB-002.in/A/moon.pkg.json b/crates/moon/tests/test_cases/simple-pkg-AB-002.in/A/moon.pkg.json
new file mode 100644
index 00000000..72eb22fe
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-AB-002.in/A/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/simple-pkg-AB-002.in/B/lib.mbt b/crates/moon/tests/test_cases/simple-pkg-AB-002.in/B/lib.mbt
new file mode 100644
index 00000000..98f4a947
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-AB-002.in/B/lib.mbt
@@ -0,0 +1,4 @@
+pub fn f() -> Unit {
+  @A.f()
+  println("B")
+}
diff --git a/crates/moon/tests/test_cases/simple-pkg-AB-002.in/B/moon.pkg.json b/crates/moon/tests/test_cases/simple-pkg-AB-002.in/B/moon.pkg.json
new file mode 100644
index 00000000..d83e82ab
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-AB-002.in/B/moon.pkg.json
@@ -0,0 +1,5 @@
+{
+  "import": {
+    "hello/A": ""
+  }
+}
diff --git a/crates/moon/tests/test_cases/simple-pkg-AB-002.in/main/main.mbt b/crates/moon/tests/test_cases/simple-pkg-AB-002.in/main/main.mbt
new file mode 100644
index 00000000..cd80519f
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-AB-002.in/main/main.mbt
@@ -0,0 +1,4 @@
+fn main {
+  @B.f()
+  println("main")
+}
diff --git a/crates/moon/tests/test_cases/simple-pkg-AB-002.in/main/moon.pkg.json b/crates/moon/tests/test_cases/simple-pkg-AB-002.in/main/moon.pkg.json
new file mode 100644
index 00000000..64810155
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-AB-002.in/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": {
+    "hello/B": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/simple-pkg-AB-002.in/moon.mod.json b/crates/moon/tests/test_cases/simple-pkg-AB-002.in/moon.mod.json
new file mode 100644
index 00000000..61113747
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-AB-002.in/moon.mod.json
@@ -0,0 +1,3 @@
+{
+  "name": "hello"
+}
diff --git a/crates/moon/tests/test_cases/simple-pkg-AB-003.in/A/lib.mbt b/crates/moon/tests/test_cases/simple-pkg-AB-003.in/A/lib.mbt
new file mode 100644
index 00000000..0c8ba57d
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-AB-003.in/A/lib.mbt
@@ -0,0 +1,3 @@
+pub fn f() -> Unit {
+  println("A")
+}
diff --git a/crates/moon/tests/test_cases/simple-pkg-AB-003.in/A/moon.pkg.json b/crates/moon/tests/test_cases/simple-pkg-AB-003.in/A/moon.pkg.json
new file mode 100644
index 00000000..9585a087
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-AB-003.in/A/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
diff --git a/crates/moon/tests/test_cases/simple-pkg-AB-003.in/B/lib.mbt b/crates/moon/tests/test_cases/simple-pkg-AB-003.in/B/lib.mbt
new file mode 100644
index 00000000..c1721c99
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-AB-003.in/B/lib.mbt
@@ -0,0 +1,3 @@
+pub fn f() -> Unit {
+  println("B")
+}
diff --git a/crates/moon/tests/test_cases/simple-pkg-AB-003.in/B/moon.pkg.json b/crates/moon/tests/test_cases/simple-pkg-AB-003.in/B/moon.pkg.json
new file mode 100644
index 00000000..9585a087
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-AB-003.in/B/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
diff --git a/crates/moon/tests/test_cases/simple-pkg-AB-003.in/main/main.mbt b/crates/moon/tests/test_cases/simple-pkg-AB-003.in/main/main.mbt
new file mode 100644
index 00000000..6264270b
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-AB-003.in/main/main.mbt
@@ -0,0 +1,5 @@
+fn main {
+  @C.f()
+  @D.f()
+  println("main")
+}
diff --git a/crates/moon/tests/test_cases/simple-pkg-AB-003.in/main/moon.pkg.json b/crates/moon/tests/test_cases/simple-pkg-AB-003.in/main/moon.pkg.json
new file mode 100644
index 00000000..141b259b
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-AB-003.in/main/moon.pkg.json
@@ -0,0 +1,7 @@
+{
+  "is-main": true,
+  "import": {
+    "hello/A": "C",
+    "hello/B": "D"
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/simple-pkg-AB-003.in/moon.mod.json b/crates/moon/tests/test_cases/simple-pkg-AB-003.in/moon.mod.json
new file mode 100644
index 00000000..61113747
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-AB-003.in/moon.mod.json
@@ -0,0 +1,3 @@
+{
+  "name": "hello"
+}
diff --git a/crates/moon/tests/test_cases/simple-pkg-AB-004.in/A/lib.mbt b/crates/moon/tests/test_cases/simple-pkg-AB-004.in/A/lib.mbt
new file mode 100644
index 00000000..0c8ba57d
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-AB-004.in/A/lib.mbt
@@ -0,0 +1,3 @@
+pub fn f() -> Unit {
+  println("A")
+}
diff --git a/crates/moon/tests/test_cases/simple-pkg-AB-004.in/A/moon.pkg.json b/crates/moon/tests/test_cases/simple-pkg-AB-004.in/A/moon.pkg.json
new file mode 100644
index 00000000..9585a087
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-AB-004.in/A/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "import": {}
+}
diff --git a/crates/moon/tests/test_cases/simple-pkg-AB-004.in/B/lib.mbt b/crates/moon/tests/test_cases/simple-pkg-AB-004.in/B/lib.mbt
new file mode 100644
index 00000000..98f4a947
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-AB-004.in/B/lib.mbt
@@ -0,0 +1,4 @@
+pub fn f() -> Unit {
+  @A.f()
+  println("B")
+}
diff --git a/crates/moon/tests/test_cases/simple-pkg-AB-004.in/B/moon.pkg.json b/crates/moon/tests/test_cases/simple-pkg-AB-004.in/B/moon.pkg.json
new file mode 100644
index 00000000..d83e82ab
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-AB-004.in/B/moon.pkg.json
@@ -0,0 +1,5 @@
+{
+  "import": {
+    "hello/A": ""
+  }
+}
diff --git a/crates/moon/tests/test_cases/simple-pkg-AB-004.in/main/main.mbt b/crates/moon/tests/test_cases/simple-pkg-AB-004.in/main/main.mbt
new file mode 100644
index 00000000..18d58f4c
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-AB-004.in/main/main.mbt
@@ -0,0 +1,4 @@
+fn main {
+  @D.f()
+  println("main")
+}
diff --git a/crates/moon/tests/test_cases/simple-pkg-AB-004.in/main/moon.pkg.json b/crates/moon/tests/test_cases/simple-pkg-AB-004.in/main/moon.pkg.json
new file mode 100644
index 00000000..d6d6583a
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-AB-004.in/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": {
+    "hello/B": "D"
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/simple-pkg-AB-004.in/moon.mod.json b/crates/moon/tests/test_cases/simple-pkg-AB-004.in/moon.mod.json
new file mode 100644
index 00000000..61113747
--- /dev/null
+++ b/crates/moon/tests/test_cases/simple-pkg-AB-004.in/moon.mod.json
@@ -0,0 +1,3 @@
+{
+  "name": "hello"
+}
diff --git a/crates/moon/tests/test_cases/target-backend.in/lib/hello.mbt b/crates/moon/tests/test_cases/target-backend.in/lib/hello.mbt
new file mode 100644
index 00000000..a7ac2bee
--- /dev/null
+++ b/crates/moon/tests/test_cases/target-backend.in/lib/hello.mbt
@@ -0,0 +1,4 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
+
diff --git a/crates/moon/tests/test_cases/target-backend.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/target-backend.in/lib/moon.pkg.json
new file mode 100644
index 00000000..0967ef42
--- /dev/null
+++ b/crates/moon/tests/test_cases/target-backend.in/lib/moon.pkg.json
@@ -0,0 +1 @@
+{}
diff --git a/crates/moon/tests/test_cases/target-backend.in/main/main.mbt b/crates/moon/tests/test_cases/target-backend.in/main/main.mbt
new file mode 100644
index 00000000..d25cb935
--- /dev/null
+++ b/crates/moon/tests/test_cases/target-backend.in/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println(@lib.hello())
+}
diff --git a/crates/moon/tests/test_cases/target-backend.in/main/moon.pkg.json b/crates/moon/tests/test_cases/target-backend.in/main/moon.pkg.json
new file mode 100644
index 00000000..0dccc0db
--- /dev/null
+++ b/crates/moon/tests/test_cases/target-backend.in/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": {
+    "hello/lib": ""
+  }
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/target-backend.in/moon.mod.json b/crates/moon/tests/test_cases/target-backend.in/moon.mod.json
new file mode 100644
index 00000000..61113747
--- /dev/null
+++ b/crates/moon/tests/test_cases/target-backend.in/moon.mod.json
@@ -0,0 +1,3 @@
+{
+  "name": "hello"
+}
diff --git a/crates/moon/tests/test_cases/test_deny_warn.in/.gitignore b/crates/moon/tests/test_cases/test_deny_warn.in/.gitignore
new file mode 100644
index 00000000..b1283a74
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_deny_warn.in/.gitignore
@@ -0,0 +1,2 @@
+target/
+.mooncakes/
diff --git a/crates/moon/tests/test_cases/test_deny_warn.in/README.md b/crates/moon/tests/test_cases/test_deny_warn.in/README.md
new file mode 100644
index 00000000..ae00983f
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_deny_warn.in/README.md
@@ -0,0 +1 @@
+# username/hello
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_deny_warn.in/lib/hello.mbt b/crates/moon/tests/test_cases/test_deny_warn.in/lib/hello.mbt
new file mode 100644
index 00000000..be6fb4f8
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_deny_warn.in/lib/hello.mbt
@@ -0,0 +1,23 @@
+// 中文中文中文中文中文中文
+// 🤣😭🤣😭🤣😭🤣😭🤣😭🤣😭🤣😭🤣😭🤣😭🤣😭🤣😭🤣😭🤣🤣😭🤣😭🤣🤣😭🤣😭🤣🤣😭🤣😭🤣🤣😭🤣😭🤣😭🤣😭🤣😭
+test {
+  let a = 1;
+  // 中文中文中文中文中文中文
+  // 中文中文中文中文中文中文
+  // 中文中文中文中文中文中文
+  // 🤣😭🤣😭🤣😭🤣😭🤣😭
+  // 🤣😭🤣😭🤣😭🤣😭🤣😭
+  // 🤣😭🤣😭🤣😭🤣😭🤣😭
+  let 中文 = 2
+  let 🤣😭🤣😭🤣 = 2
+  alert_1();
+  alert_2();
+}
+
+/// @alert alert_1 "alert_1"
+fn alert_1() -> Unit {
+}
+
+/// @alert alert_2 "alert_2"
+fn alert_2() -> Unit {
+}
diff --git a/crates/moon/tests/test_cases/test_deny_warn.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/test_deny_warn.in/lib/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_deny_warn.in/lib/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_deny_warn.in/main/main.mbt b/crates/moon/tests/test_cases/test_deny_warn.in/main/main.mbt
new file mode 100644
index 00000000..1ff0d94b
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_deny_warn.in/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  let a = 0
+}
diff --git a/crates/moon/tests/test_cases/test_deny_warn.in/main/moon.pkg.json b/crates/moon/tests/test_cases/test_deny_warn.in/main/moon.pkg.json
new file mode 100644
index 00000000..48783525
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_deny_warn.in/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": [
+    "username/hello/lib"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_deny_warn.in/moon.mod.json b/crates/moon/tests/test_cases/test_deny_warn.in/moon.mod.json
new file mode 100644
index 00000000..80554ae2
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_deny_warn.in/moon.mod.json
@@ -0,0 +1,9 @@
+{
+  "name": "username/hello",
+  "version": "0.1.0",
+  "readme": "README.md",
+  "repository": "",
+  "license": "",
+  "keywords": [],
+  "description": ""
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_error_report.in/.gitignore b/crates/moon/tests/test_cases/test_error_report.in/.gitignore
new file mode 100644
index 00000000..b1283a74
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_error_report.in/.gitignore
@@ -0,0 +1,2 @@
+target/
+.mooncakes/
diff --git a/crates/moon/tests/test_cases/test_error_report.in/lib/hello.mbt b/crates/moon/tests/test_cases/test_error_report.in/lib/hello.mbt
new file mode 100644
index 00000000..9012592a
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_error_report.in/lib/hello.mbt
@@ -0,0 +1,3 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
diff --git a/crates/moon/tests/test_cases/test_error_report.in/lib/hello_wbtest.mbt b/crates/moon/tests/test_cases/test_error_report.in/lib/hello_wbtest.mbt
new file mode 100644
index 00000000..c9a46222
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_error_report.in/lib/hello_wbtest.mbt
@@ -0,0 +1,5 @@
+test {
+  if hello() != "Hello, world!" {
+    abort("")
+  }
+}
diff --git a/crates/moon/tests/test_cases/test_error_report.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/test_error_report.in/lib/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_error_report.in/lib/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_error_report.in/main/main.mbt b/crates/moon/tests/test_cases/test_error_report.in/main/main.mbt
new file mode 100644
index 00000000..d25cb935
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_error_report.in/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println(@lib.hello())
+}
diff --git a/crates/moon/tests/test_cases/test_error_report.in/main/moon.pkg.json b/crates/moon/tests/test_cases/test_error_report.in/main/moon.pkg.json
new file mode 100644
index 00000000..dc2de995
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_error_report.in/main/moon.pkg.json
@@ -0,0 +1,7 @@
+{
+  "is-main": true,
+  "import": [
+    "moonbitlang/report/lib",
+    "haha"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_error_report.in/moon.mod.json b/crates/moon/tests/test_cases/test_error_report.in/moon.mod.json
new file mode 100644
index 00000000..6bacbee0
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_error_report.in/moon.mod.json
@@ -0,0 +1,4 @@
+{
+  "name": "moonbitlang/report",
+  "version": "0.1.0"
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_filter.in/A/hello.mbt b/crates/moon/tests/test_cases/test_filter.in/A/hello.mbt
new file mode 100644
index 00000000..59d483e5
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter.in/A/hello.mbt
@@ -0,0 +1,11 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
+
+test "A" {
+  println("test A")
+}
+
+test "B" {
+  println("test B")
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_filter.in/A/hello_wbtest.mbt b/crates/moon/tests/test_cases/test_filter.in/A/hello_wbtest.mbt
new file mode 100644
index 00000000..6cfb19cc
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter.in/A/hello_wbtest.mbt
@@ -0,0 +1,11 @@
+test "hello_0" {
+  println("test hello_0")
+}
+
+test "hello_1" {
+  println("test hello_1")
+}
+
+test "hello_2" {
+  println("test hello_2")
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_filter.in/A/moon.pkg.json b/crates/moon/tests/test_cases/test_filter.in/A/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter.in/A/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_filter.in/A/test.mbt b/crates/moon/tests/test_cases/test_filter.in/A/test.mbt
new file mode 100644
index 00000000..2724e784
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter.in/A/test.mbt
@@ -0,0 +1,7 @@
+test "C" {
+  println("test C")
+}
+
+test "D" {
+  println("test D")
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_filter.in/lib/hello.mbt b/crates/moon/tests/test_cases/test_filter.in/lib/hello.mbt
new file mode 100644
index 00000000..3f8d87f5
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter.in/lib/hello.mbt
@@ -0,0 +1,7 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
+
+test "A" {
+  println("test A")
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_filter.in/lib/hello_wbtest.mbt b/crates/moon/tests/test_cases/test_filter.in/lib/hello_wbtest.mbt
new file mode 100644
index 00000000..127a51c4
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter.in/lib/hello_wbtest.mbt
@@ -0,0 +1,7 @@
+test "hello_0" {
+  println("test hello_0")
+}
+
+test "hello_1" {
+  println("test hello_1")
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_filter.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/test_filter.in/lib/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter.in/lib/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_filter.in/lib2/lib.mbt b/crates/moon/tests/test_cases/test_filter.in/lib2/lib.mbt
new file mode 100644
index 00000000..43c786ca
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter.in/lib2/lib.mbt
@@ -0,0 +1,14 @@
+test {
+  println(2)
+}
+
+test {
+  inspect(1)!
+  inspect(1 + 2)!
+  inspect("hello")!
+  inspect([1, 2, 3])!
+}
+
+test {
+  inspect(2)!
+}
diff --git a/crates/moon/tests/test_cases/test_filter.in/lib2/moon.pkg.json b/crates/moon/tests/test_cases/test_filter.in/lib2/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter.in/lib2/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_filter.in/main/main.mbt b/crates/moon/tests/test_cases/test_filter.in/main/main.mbt
new file mode 100644
index 00000000..d25cb935
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter.in/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println(@lib.hello())
+}
diff --git a/crates/moon/tests/test_cases/test_filter.in/main/moon.pkg.json b/crates/moon/tests/test_cases/test_filter.in/main/moon.pkg.json
new file mode 100644
index 00000000..48783525
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter.in/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": [
+    "username/hello/lib"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_filter.in/moon.mod.json b/crates/moon/tests/test_cases/test_filter.in/moon.mod.json
new file mode 100644
index 00000000..80554ae2
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter.in/moon.mod.json
@@ -0,0 +1,9 @@
+{
+  "name": "username/hello",
+  "version": "0.1.0",
+  "readme": "README.md",
+  "repository": "",
+  "license": "",
+  "keywords": [],
+  "description": ""
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_filter_pkg_with_deps.in/lib/lib.mbt b/crates/moon/tests/test_cases/test_filter_pkg_with_deps.in/lib/lib.mbt
new file mode 100644
index 00000000..f0efadaa
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter_pkg_with_deps.in/lib/lib.mbt
@@ -0,0 +1,3 @@
+test "hello_lib" {
+  println(@lib1.hello_from_lib1())
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_filter_pkg_with_deps.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/test_filter_pkg_with_deps.in/lib/moon.pkg.json
new file mode 100644
index 00000000..a2234e6f
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter_pkg_with_deps.in/lib/moon.pkg.json
@@ -0,0 +1,5 @@
+{
+  "import": [
+    "username/hello/lib1"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_filter_pkg_with_deps.in/lib1/lib.mbt b/crates/moon/tests/test_cases/test_filter_pkg_with_deps.in/lib1/lib.mbt
new file mode 100644
index 00000000..23667fd7
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter_pkg_with_deps.in/lib1/lib.mbt
@@ -0,0 +1,10 @@
+pub fn hello_from_lib1() -> String {
+  println("Hello from lib1")
+  println(@lib2.hello_from_lib2())
+  println(@lib3.hello_from_lib3())
+  ""
+}
+
+test {
+  println(hello_from_lib1())
+}
diff --git a/crates/moon/tests/test_cases/test_filter_pkg_with_deps.in/lib1/moon.pkg.json b/crates/moon/tests/test_cases/test_filter_pkg_with_deps.in/lib1/moon.pkg.json
new file mode 100644
index 00000000..98e4a2c1
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter_pkg_with_deps.in/lib1/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "import": [
+    "username/hello/lib2",
+    "username/hello/lib3"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_filter_pkg_with_deps.in/lib2/lib.mbt b/crates/moon/tests/test_cases/test_filter_pkg_with_deps.in/lib2/lib.mbt
new file mode 100644
index 00000000..d7d388b1
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter_pkg_with_deps.in/lib2/lib.mbt
@@ -0,0 +1,9 @@
+pub fn hello_from_lib2() -> String {
+  println("Hello from lib2")
+  println(@lib4.hello_from_lib4())
+  ""
+}
+
+test {
+  println(hello_from_lib2())
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_filter_pkg_with_deps.in/lib2/moon.pkg.json b/crates/moon/tests/test_cases/test_filter_pkg_with_deps.in/lib2/moon.pkg.json
new file mode 100644
index 00000000..65fc5a43
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter_pkg_with_deps.in/lib2/moon.pkg.json
@@ -0,0 +1,5 @@
+{
+  "import": [
+    "username/hello/lib4"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_filter_pkg_with_deps.in/lib3/lib.mbt b/crates/moon/tests/test_cases/test_filter_pkg_with_deps.in/lib3/lib.mbt
new file mode 100644
index 00000000..d027340a
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter_pkg_with_deps.in/lib3/lib.mbt
@@ -0,0 +1,9 @@
+pub fn hello_from_lib3() -> String {
+  println("Hello from lib3")
+  println(@lib4.hello_from_lib4())
+  ""
+}
+
+test {
+  println(hello_from_lib3())
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_filter_pkg_with_deps.in/lib3/moon.pkg.json b/crates/moon/tests/test_cases/test_filter_pkg_with_deps.in/lib3/moon.pkg.json
new file mode 100644
index 00000000..65fc5a43
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter_pkg_with_deps.in/lib3/moon.pkg.json
@@ -0,0 +1,5 @@
+{
+  "import": [
+    "username/hello/lib4"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_filter_pkg_with_deps.in/lib4/lib.mbt b/crates/moon/tests/test_cases/test_filter_pkg_with_deps.in/lib4/lib.mbt
new file mode 100644
index 00000000..90e8b5d1
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter_pkg_with_deps.in/lib4/lib.mbt
@@ -0,0 +1,7 @@
+pub fn hello_from_lib4() -> String {
+  "Hello from lib4"
+}
+
+test {
+  println(hello_from_lib4())
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_filter_pkg_with_deps.in/lib4/moon.pkg.json b/crates/moon/tests/test_cases/test_filter_pkg_with_deps.in/lib4/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter_pkg_with_deps.in/lib4/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_filter_pkg_with_deps.in/main/main.mbt b/crates/moon/tests/test_cases/test_filter_pkg_with_deps.in/main/main.mbt
new file mode 100644
index 00000000..d25cb935
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter_pkg_with_deps.in/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println(@lib.hello())
+}
diff --git a/crates/moon/tests/test_cases/test_filter_pkg_with_deps.in/main/moon.pkg.json b/crates/moon/tests/test_cases/test_filter_pkg_with_deps.in/main/moon.pkg.json
new file mode 100644
index 00000000..48783525
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter_pkg_with_deps.in/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": [
+    "username/hello/lib"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_filter_pkg_with_deps.in/moon.mod.json b/crates/moon/tests/test_cases/test_filter_pkg_with_deps.in/moon.mod.json
new file mode 100644
index 00000000..80554ae2
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter_pkg_with_deps.in/moon.mod.json
@@ -0,0 +1,9 @@
+{
+  "name": "username/hello",
+  "version": "0.1.0",
+  "readme": "README.md",
+  "repository": "",
+  "license": "",
+  "keywords": [],
+  "description": ""
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib/_wbtest.mbt b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib/_wbtest.mbt
new file mode 100644
index 00000000..e9daf1f7
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib/_wbtest.mbt
@@ -0,0 +1,3 @@
+test "hello_lib" {
+  println(@lib7.hello_from_lib7())
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib/lib.mbt b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib/lib.mbt
new file mode 100644
index 00000000..def58d0b
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib/lib.mbt
@@ -0,0 +1,4 @@
+test "hello_lib" {
+  println(@lib1.hello_from_lib1())
+  println(@lib2.hello_from_lib2())
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib/moon.pkg.json
new file mode 100644
index 00000000..8a53af12
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib/moon.pkg.json
@@ -0,0 +1,9 @@
+{
+  "import": [
+    "username/hello/lib1",
+    "username/hello/lib2"
+  ],
+  "wbtest-import": [
+    "username/hello/lib7"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib1/lib.mbt b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib1/lib.mbt
new file mode 100644
index 00000000..c177e326
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib1/lib.mbt
@@ -0,0 +1,9 @@
+pub fn hello_from_lib1() -> String {
+  println("Hello from lib1")
+
+  ""
+}
+
+test {
+  println(@lib3.hello_from_lib3())
+}
diff --git a/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib1/moon.pkg.json b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib1/moon.pkg.json
new file mode 100644
index 00000000..e01e4913
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib1/moon.pkg.json
@@ -0,0 +1,5 @@
+{
+  "import": [
+    "username/hello/lib3"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib2/lib.mbt b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib2/lib.mbt
new file mode 100644
index 00000000..b9976f7d
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib2/lib.mbt
@@ -0,0 +1,9 @@
+pub fn hello_from_lib2() -> String {
+  println("Hello from lib2")
+
+  ""
+}
+
+test {
+  println(@lib4.hello_from_lib4())
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib2/moon.pkg.json b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib2/moon.pkg.json
new file mode 100644
index 00000000..65fc5a43
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib2/moon.pkg.json
@@ -0,0 +1,5 @@
+{
+  "import": [
+    "username/hello/lib4"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib3/_wbtest.mbt b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib3/_wbtest.mbt
new file mode 100644
index 00000000..e931fd42
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib3/_wbtest.mbt
@@ -0,0 +1,3 @@
+test {
+  println(@lib6.hello_from_lib6())
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib3/lib.mbt b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib3/lib.mbt
new file mode 100644
index 00000000..f9246c55
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib3/lib.mbt
@@ -0,0 +1,13 @@
+pub fn hello_from_lib3() -> String {
+  println("Hello from lib3")
+  ""
+}
+
+test {
+  println(hello_from_lib3())
+}
+
+
+test {
+  println(@lib7.hello_from_lib7())
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib3/moon.pkg.json b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib3/moon.pkg.json
new file mode 100644
index 00000000..737ec956
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib3/moon.pkg.json
@@ -0,0 +1,11 @@
+{
+  /* */
+  "import": [
+    "username/hello/lib7"
+  ],
+  //
+  "wbtest-import": [
+    "username/hello/lib5",
+    "username/hello/lib6"
+  ],
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib4/_wbtest.mbt b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib4/_wbtest.mbt
new file mode 100644
index 00000000..d035b5db
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib4/_wbtest.mbt
@@ -0,0 +1,7 @@
+test {
+  println(@lib5.hello_from_lib5())
+}
+
+test {
+  println(@lib7.hello_from_lib7())
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib4/lib.mbt b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib4/lib.mbt
new file mode 100644
index 00000000..f4948367
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib4/lib.mbt
@@ -0,0 +1,8 @@
+pub fn hello_from_lib4() -> String {
+  "Hello from lib4"
+}
+
+test {
+  println(@lib5.hello_from_lib5())
+}
+
diff --git a/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib4/moon.pkg.json b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib4/moon.pkg.json
new file mode 100644
index 00000000..55a5d9d7
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib4/moon.pkg.json
@@ -0,0 +1,8 @@
+{
+  "import": [
+    "username/hello/lib5"
+  ],
+  "wbtest-import": [
+    "username/hello/lib7"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib5/lib.mbt b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib5/lib.mbt
new file mode 100644
index 00000000..841f9833
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib5/lib.mbt
@@ -0,0 +1,7 @@
+pub fn hello_from_lib5() -> String {
+  "Hello from lib5"
+}
+
+test {
+  println(hello_from_lib5())
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib5/moon.pkg.json b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib5/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib5/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib6/lib.mbt b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib6/lib.mbt
new file mode 100644
index 00000000..16ac38be
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib6/lib.mbt
@@ -0,0 +1,7 @@
+pub fn hello_from_lib6() -> String {
+  "Hello from lib6"
+}
+
+test {
+  println(hello_from_lib6())
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib6/moon.pkg.json b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib6/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib6/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib7/_wbtest.mbt b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib7/_wbtest.mbt
new file mode 100644
index 00000000..e931fd42
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib7/_wbtest.mbt
@@ -0,0 +1,3 @@
+test {
+  println(@lib6.hello_from_lib6())
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib7/lib.mbt b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib7/lib.mbt
new file mode 100644
index 00000000..d9f1296c
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib7/lib.mbt
@@ -0,0 +1,7 @@
+pub fn hello_from_lib7() -> String {
+  "Hello from lib7"
+}
+
+test {
+  println(hello_from_lib7())
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib7/moon.pkg.json b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib7/moon.pkg.json
new file mode 100644
index 00000000..3f88af0f
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/lib7/moon.pkg.json
@@ -0,0 +1,5 @@
+{
+  "wbtest-import": [
+    "username/hello/lib6"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/main/main.mbt b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/main/main.mbt
new file mode 100644
index 00000000..d25cb935
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println(@lib.hello())
+}
diff --git a/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/main/moon.pkg.json b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/main/moon.pkg.json
new file mode 100644
index 00000000..48783525
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": [
+    "username/hello/lib"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/moon.mod.json b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/moon.mod.json
new file mode 100644
index 00000000..42ed3b56
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/moon.mod.json
@@ -0,0 +1,11 @@
+{
+  "name": "username/hello",
+  "version": "0.1.0",
+  /* */
+  "readme": "README.md",
+  "repository": "",
+  "license": "",
+  "keywords": [],
+  //
+  "description": "",
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/test_moon_test_filter_package_with_test_imports.drawio.png b/crates/moon/tests/test_cases/test_filter_pkg_with_test_imports.in/test_moon_test_filter_package_with_test_imports.drawio.png
new file mode 100644
index 0000000000000000000000000000000000000000..6f446c6b14ba892aff71cf4843ad8b9ac575adeb
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literal 0
HcmV?d00001

diff --git a/crates/moon/tests/test_cases/test_import/.gitignore b/crates/moon/tests/test_cases/test_import/.gitignore
new file mode 100644
index 00000000..b1283a74
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_import/.gitignore
@@ -0,0 +1,2 @@
+target/
+.mooncakes/
diff --git a/crates/moon/tests/test_cases/test_import/README.md b/crates/moon/tests/test_cases/test_import/README.md
new file mode 100644
index 00000000..9d26e38a
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_import/README.md
@@ -0,0 +1,11 @@
+# username/hello
+
+```
+  s   t
+   \ /(timport)
+    a 
+  /   \
+b       c
+ \     /
+   main
+```
diff --git a/crates/moon/tests/test_cases/test_import/a/a.mbt b/crates/moon/tests/test_cases/test_import/a/a.mbt
new file mode 100644
index 00000000..ce4dddf3
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_import/a/a.mbt
@@ -0,0 +1,7 @@
+pub fn a() -> String {
+  "a"
+}
+
+test "a_import_s" {
+  println(@s.s())
+}
diff --git a/crates/moon/tests/test_cases/test_import/a/a_wbtest.mbt b/crates/moon/tests/test_cases/test_import/a/a_wbtest.mbt
new file mode 100644
index 00000000..b1039b4d
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_import/a/a_wbtest.mbt
@@ -0,0 +1,3 @@
+test "a_test_imported_t" {
+  println(@t.t())
+}
diff --git a/crates/moon/tests/test_cases/test_import/a/moon.pkg.json b/crates/moon/tests/test_cases/test_import/a/moon.pkg.json
new file mode 100644
index 00000000..00b2d78a
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_import/a/moon.pkg.json
@@ -0,0 +1,8 @@
+{
+  "import": [
+    "username/hello/s"
+  ],
+  "wbtest-import": [
+    "username/hello/t"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_import/b/b.mbt b/crates/moon/tests/test_cases/test_import/b/b.mbt
new file mode 100644
index 00000000..351d81c7
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_import/b/b.mbt
@@ -0,0 +1,3 @@
+pub fn b() -> String {
+  "b"
+}
diff --git a/crates/moon/tests/test_cases/test_import/b/moon.pkg.json b/crates/moon/tests/test_cases/test_import/b/moon.pkg.json
new file mode 100644
index 00000000..d90ce5a4
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_import/b/moon.pkg.json
@@ -0,0 +1,5 @@
+{
+  "import": [
+    "username/hello/a"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_import/c/c.mbt b/crates/moon/tests/test_cases/test_import/c/c.mbt
new file mode 100644
index 00000000..b448aca9
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_import/c/c.mbt
@@ -0,0 +1,3 @@
+pub fn c() -> String {
+  "c"
+}
diff --git a/crates/moon/tests/test_cases/test_import/c/moon.pkg.json b/crates/moon/tests/test_cases/test_import/c/moon.pkg.json
new file mode 100644
index 00000000..d90ce5a4
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_import/c/moon.pkg.json
@@ -0,0 +1,5 @@
+{
+  "import": [
+    "username/hello/a"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_import/main/main.mbt b/crates/moon/tests/test_cases/test_import/main/main.mbt
new file mode 100644
index 00000000..56b05088
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_import/main/main.mbt
@@ -0,0 +1,4 @@
+fn main {
+  println(@b.b())
+  println(@c.c())
+}
diff --git a/crates/moon/tests/test_cases/test_import/main/moon.pkg.json b/crates/moon/tests/test_cases/test_import/main/moon.pkg.json
new file mode 100644
index 00000000..6be56b3d
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_import/main/moon.pkg.json
@@ -0,0 +1,7 @@
+{
+  "is-main": true,
+  "import": [
+    "username/hello/b",
+    "username/hello/c"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_import/moon.mod.json b/crates/moon/tests/test_cases/test_import/moon.mod.json
new file mode 100644
index 00000000..80554ae2
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_import/moon.mod.json
@@ -0,0 +1,9 @@
+{
+  "name": "username/hello",
+  "version": "0.1.0",
+  "readme": "README.md",
+  "repository": "",
+  "license": "",
+  "keywords": [],
+  "description": ""
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_import/s/moon.pkg.json b/crates/moon/tests/test_cases/test_import/s/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_import/s/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_import/s/t.mbt b/crates/moon/tests/test_cases/test_import/s/t.mbt
new file mode 100644
index 00000000..bbbc1353
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_import/s/t.mbt
@@ -0,0 +1,3 @@
+pub fn s() -> String {
+  "s"
+}
diff --git a/crates/moon/tests/test_cases/test_import/t/moon.pkg.json b/crates/moon/tests/test_cases/test_import/t/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_import/t/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_import/t/t.mbt b/crates/moon/tests/test_cases/test_import/t/t.mbt
new file mode 100644
index 00000000..e90bc10d
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_import/t/t.mbt
@@ -0,0 +1,3 @@
+pub fn t() -> String {
+  "t"
+}
diff --git a/crates/moon/tests/test_cases/test_many_targets.in/.gitignore b/crates/moon/tests/test_cases/test_many_targets.in/.gitignore
new file mode 100644
index 00000000..b1283a74
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_many_targets.in/.gitignore
@@ -0,0 +1,2 @@
+target/
+.mooncakes/
diff --git a/crates/moon/tests/test_cases/test_many_targets.in/lib/hello.mbt b/crates/moon/tests/test_cases/test_many_targets.in/lib/hello.mbt
new file mode 100644
index 00000000..9012592a
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_many_targets.in/lib/hello.mbt
@@ -0,0 +1,3 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
diff --git a/crates/moon/tests/test_cases/test_many_targets.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/test_many_targets.in/lib/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_many_targets.in/lib/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_many_targets.in/link/hello.mbt b/crates/moon/tests/test_cases/test_many_targets.in/link/hello.mbt
new file mode 100644
index 00000000..9012592a
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_many_targets.in/link/hello.mbt
@@ -0,0 +1,3 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
diff --git a/crates/moon/tests/test_cases/test_many_targets.in/link/moon.pkg.json b/crates/moon/tests/test_cases/test_many_targets.in/link/moon.pkg.json
new file mode 100644
index 00000000..8873c9d1
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_many_targets.in/link/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+    "link": true
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_many_targets.in/moon.mod.json b/crates/moon/tests/test_cases/test_many_targets.in/moon.mod.json
new file mode 100644
index 00000000..80554ae2
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_many_targets.in/moon.mod.json
@@ -0,0 +1,9 @@
+{
+  "name": "username/hello",
+  "version": "0.1.0",
+  "readme": "README.md",
+  "repository": "",
+  "license": "",
+  "keywords": [],
+  "description": ""
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_many_targets_auto_update.in/.gitignore b/crates/moon/tests/test_cases/test_many_targets_auto_update.in/.gitignore
new file mode 100644
index 00000000..b1283a74
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_many_targets_auto_update.in/.gitignore
@@ -0,0 +1,2 @@
+target/
+.mooncakes/
diff --git a/crates/moon/tests/test_cases/test_many_targets_auto_update.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/test_many_targets_auto_update.in/lib/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_many_targets_auto_update.in/lib/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_many_targets_auto_update.in/lib/x.js.mbt b/crates/moon/tests/test_cases/test_many_targets_auto_update.in/lib/x.js.mbt
new file mode 100644
index 00000000..5fa4c0b7
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_many_targets_auto_update.in/lib/x.js.mbt
@@ -0,0 +1,3 @@
+test {
+  inspect!("js")
+}
diff --git a/crates/moon/tests/test_cases/test_many_targets_auto_update.in/lib/x.wasm-gc.mbt b/crates/moon/tests/test_cases/test_many_targets_auto_update.in/lib/x.wasm-gc.mbt
new file mode 100644
index 00000000..78737e6e
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_many_targets_auto_update.in/lib/x.wasm-gc.mbt
@@ -0,0 +1,3 @@
+test {
+  inspect!("wasm-gc")
+}
diff --git a/crates/moon/tests/test_cases/test_many_targets_auto_update.in/lib/x.wasm.mbt b/crates/moon/tests/test_cases/test_many_targets_auto_update.in/lib/x.wasm.mbt
new file mode 100644
index 00000000..70b6f829
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_many_targets_auto_update.in/lib/x.wasm.mbt
@@ -0,0 +1,3 @@
+test {
+  inspect!("wasm")
+}
diff --git a/crates/moon/tests/test_cases/test_many_targets_auto_update.in/moon.mod.json b/crates/moon/tests/test_cases/test_many_targets_auto_update.in/moon.mod.json
new file mode 100644
index 00000000..80554ae2
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_many_targets_auto_update.in/moon.mod.json
@@ -0,0 +1,9 @@
+{
+  "name": "username/hello",
+  "version": "0.1.0",
+  "readme": "README.md",
+  "repository": "",
+  "license": "",
+  "keywords": [],
+  "description": ""
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_many_targets_expect_failed.in/.gitignore b/crates/moon/tests/test_cases/test_many_targets_expect_failed.in/.gitignore
new file mode 100644
index 00000000..b1283a74
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_many_targets_expect_failed.in/.gitignore
@@ -0,0 +1,2 @@
+target/
+.mooncakes/
diff --git a/crates/moon/tests/test_cases/test_many_targets_expect_failed.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/test_many_targets_expect_failed.in/lib/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_many_targets_expect_failed.in/lib/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_many_targets_expect_failed.in/lib/x.js.mbt b/crates/moon/tests/test_cases/test_many_targets_expect_failed.in/lib/x.js.mbt
new file mode 100644
index 00000000..a0dd4415
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_many_targets_expect_failed.in/lib/x.js.mbt
@@ -0,0 +1,3 @@
+test {
+  inspect!("js", content="2")
+}
diff --git a/crates/moon/tests/test_cases/test_many_targets_expect_failed.in/lib/x.wasm-gc.mbt b/crates/moon/tests/test_cases/test_many_targets_expect_failed.in/lib/x.wasm-gc.mbt
new file mode 100644
index 00000000..abe9ff37
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_many_targets_expect_failed.in/lib/x.wasm-gc.mbt
@@ -0,0 +1,3 @@
+test {
+  inspect!("wasm-gc", content="1")
+}
diff --git a/crates/moon/tests/test_cases/test_many_targets_expect_failed.in/lib/x.wasm.mbt b/crates/moon/tests/test_cases/test_many_targets_expect_failed.in/lib/x.wasm.mbt
new file mode 100644
index 00000000..37ec76f5
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_many_targets_expect_failed.in/lib/x.wasm.mbt
@@ -0,0 +1,3 @@
+test {
+  inspect!("wasm", content="0")
+}
diff --git a/crates/moon/tests/test_cases/test_many_targets_expect_failed.in/moon.mod.json b/crates/moon/tests/test_cases/test_many_targets_expect_failed.in/moon.mod.json
new file mode 100644
index 00000000..80554ae2
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_many_targets_expect_failed.in/moon.mod.json
@@ -0,0 +1,9 @@
+{
+  "name": "username/hello",
+  "version": "0.1.0",
+  "readme": "README.md",
+  "repository": "",
+  "license": "",
+  "keywords": [],
+  "description": ""
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_multi_process/.gitignore b/crates/moon/tests/test_cases/test_multi_process/.gitignore
new file mode 100644
index 00000000..b1283a74
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_multi_process/.gitignore
@@ -0,0 +1,2 @@
+target/
+.mooncakes/
diff --git a/crates/moon/tests/test_cases/test_multi_process/README.md b/crates/moon/tests/test_cases/test_multi_process/README.md
new file mode 100644
index 00000000..ae00983f
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_multi_process/README.md
@@ -0,0 +1 @@
+# username/hello
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_multi_process/lib/hello.mbt b/crates/moon/tests/test_cases/test_multi_process/lib/hello.mbt
new file mode 100644
index 00000000..0751c426
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_multi_process/lib/hello.mbt
@@ -0,0 +1,13 @@
+test {
+  let a = 1;
+  alert_1();
+  alert_2();
+}
+
+/// @alert alert_1 "alert_1"
+fn alert_1() -> Unit {
+}
+
+/// @alert alert_2 "alert_2"
+fn alert_2() -> Unit {
+}
diff --git a/crates/moon/tests/test_cases/test_multi_process/lib/moon.pkg.json b/crates/moon/tests/test_cases/test_multi_process/lib/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_multi_process/lib/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_multi_process/main/main.mbt b/crates/moon/tests/test_cases/test_multi_process/main/main.mbt
new file mode 100644
index 00000000..1ff0d94b
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_multi_process/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  let a = 0
+}
diff --git a/crates/moon/tests/test_cases/test_multi_process/main/moon.pkg.json b/crates/moon/tests/test_cases/test_multi_process/main/moon.pkg.json
new file mode 100644
index 00000000..48783525
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_multi_process/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": [
+    "username/hello/lib"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_multi_process/moon.mod.json b/crates/moon/tests/test_cases/test_multi_process/moon.mod.json
new file mode 100644
index 00000000..80554ae2
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_multi_process/moon.mod.json
@@ -0,0 +1,9 @@
+{
+  "name": "username/hello",
+  "version": "0.1.0",
+  "readme": "README.md",
+  "repository": "",
+  "license": "",
+  "keywords": [],
+  "description": ""
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_release.in/lib/hello.mbt b/crates/moon/tests/test_cases/test_release.in/lib/hello.mbt
new file mode 100644
index 00000000..3f8d87f5
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_release.in/lib/hello.mbt
@@ -0,0 +1,7 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
+
+test "A" {
+  println("test A")
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_release.in/lib/hello_wbtest.mbt b/crates/moon/tests/test_cases/test_release.in/lib/hello_wbtest.mbt
new file mode 100644
index 00000000..127a51c4
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_release.in/lib/hello_wbtest.mbt
@@ -0,0 +1,7 @@
+test "hello_0" {
+  println("test hello_0")
+}
+
+test "hello_1" {
+  println("test hello_1")
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_release.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/test_release.in/lib/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_release.in/lib/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_release.in/main/main.mbt b/crates/moon/tests/test_cases/test_release.in/main/main.mbt
new file mode 100644
index 00000000..d25cb935
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_release.in/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println(@lib.hello())
+}
diff --git a/crates/moon/tests/test_cases/test_release.in/main/moon.pkg.json b/crates/moon/tests/test_cases/test_release.in/main/moon.pkg.json
new file mode 100644
index 00000000..48783525
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_release.in/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": [
+    "username/hello/lib"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/test_release.in/moon.mod.json b/crates/moon/tests/test_cases/test_release.in/moon.mod.json
new file mode 100644
index 00000000..80554ae2
--- /dev/null
+++ b/crates/moon/tests/test_cases/test_release.in/moon.mod.json
@@ -0,0 +1,9 @@
+{
+  "name": "username/hello",
+  "version": "0.1.0",
+  "readme": "README.md",
+  "repository": "",
+  "license": "",
+  "keywords": [],
+  "description": ""
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/third_party.in/.gitignore b/crates/moon/tests/test_cases/third_party.in/.gitignore
new file mode 100644
index 00000000..b1283a74
--- /dev/null
+++ b/crates/moon/tests/test_cases/third_party.in/.gitignore
@@ -0,0 +1,2 @@
+target/
+.mooncakes/
diff --git a/crates/moon/tests/test_cases/third_party.in/README.md b/crates/moon/tests/test_cases/third_party.in/README.md
new file mode 100644
index 00000000..ae00983f
--- /dev/null
+++ b/crates/moon/tests/test_cases/third_party.in/README.md
@@ -0,0 +1 @@
+# username/hello
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/third_party.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/third_party.in/lib/moon.pkg.json
new file mode 100644
index 00000000..5eec2d42
--- /dev/null
+++ b/crates/moon/tests/test_cases/third_party.in/lib/moon.pkg.json
@@ -0,0 +1,5 @@
+{
+  "import": [
+    "lijunchen/hello18/lib"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/third_party.in/lib/test.mbt b/crates/moon/tests/test_cases/third_party.in/lib/test.mbt
new file mode 100644
index 00000000..32d0e7d3
--- /dev/null
+++ b/crates/moon/tests/test_cases/third_party.in/lib/test.mbt
@@ -0,0 +1,8 @@
+
+test {
+  println("Hello, world!")
+}
+
+test {
+  println(@lib.hello())
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/third_party.in/main/main.mbt b/crates/moon/tests/test_cases/third_party.in/main/main.mbt
new file mode 100644
index 00000000..d25cb935
--- /dev/null
+++ b/crates/moon/tests/test_cases/third_party.in/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println(@lib.hello())
+}
diff --git a/crates/moon/tests/test_cases/third_party.in/main/moon.pkg.json b/crates/moon/tests/test_cases/third_party.in/main/moon.pkg.json
new file mode 100644
index 00000000..73e5b5bb
--- /dev/null
+++ b/crates/moon/tests/test_cases/third_party.in/main/moon.pkg.json
@@ -0,0 +1,6 @@
+{
+  "is-main": true,
+  "import": [
+    "lijunchen/hello18/lib"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/third_party.in/moon.mod.json b/crates/moon/tests/test_cases/third_party.in/moon.mod.json
new file mode 100644
index 00000000..53bf182f
--- /dev/null
+++ b/crates/moon/tests/test_cases/third_party.in/moon.mod.json
@@ -0,0 +1,12 @@
+{
+  "name": "username/hello",
+  "version": "0.1.0",
+  "deps": {
+    "lijunchen/hello18": "0.1.30"
+  },
+  "readme": "README.md",
+  "repository": "",
+  "license": "",
+  "keywords": [],
+  "description": ""
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/unicode_demo.in/README.md b/crates/moon/tests/test_cases/unicode_demo.in/README.md
new file mode 100644
index 00000000..2a12ed6d
--- /dev/null
+++ b/crates/moon/tests/test_cases/unicode_demo.in/README.md
@@ -0,0 +1,3 @@
+## Moonbit Unicode
+
+We can use emoji in Moonbit now :)
diff --git a/crates/moon/tests/test_cases/unicode_demo.in/main/main.mbt b/crates/moon/tests/test_cases/unicode_demo.in/main/main.mbt
new file mode 100644
index 00000000..0a3643c8
--- /dev/null
+++ b/crates/moon/tests/test_cases/unicode_demo.in/main/main.mbt
@@ -0,0 +1,4 @@
+fn main {
+  let 🤣 = 3
+  println(🤣)
+}
diff --git a/crates/moon/tests/test_cases/unicode_demo.in/main/moon.pkg.json b/crates/moon/tests/test_cases/unicode_demo.in/main/moon.pkg.json
new file mode 100644
index 00000000..d48c4d24
--- /dev/null
+++ b/crates/moon/tests/test_cases/unicode_demo.in/main/moon.pkg.json
@@ -0,0 +1,4 @@
+{
+  "is-main": true,
+  "import": {}
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/unicode_demo.in/moon.mod.json b/crates/moon/tests/test_cases/unicode_demo.in/moon.mod.json
new file mode 100644
index 00000000..40cfbab1
--- /dev/null
+++ b/crates/moon/tests/test_cases/unicode_demo.in/moon.mod.json
@@ -0,0 +1,3 @@
+{
+  "name": "unicode_demo"
+}
diff --git a/crates/moon/tests/test_cases/validate_import.in/.gitignore b/crates/moon/tests/test_cases/validate_import.in/.gitignore
new file mode 100644
index 00000000..b1283a74
--- /dev/null
+++ b/crates/moon/tests/test_cases/validate_import.in/.gitignore
@@ -0,0 +1,2 @@
+target/
+.mooncakes/
diff --git a/crates/moon/tests/test_cases/validate_import.in/README.md b/crates/moon/tests/test_cases/validate_import.in/README.md
new file mode 100644
index 00000000..ae00983f
--- /dev/null
+++ b/crates/moon/tests/test_cases/validate_import.in/README.md
@@ -0,0 +1 @@
+# username/hello
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/validate_import.in/lib/hello.mbt b/crates/moon/tests/test_cases/validate_import.in/lib/hello.mbt
new file mode 100644
index 00000000..9012592a
--- /dev/null
+++ b/crates/moon/tests/test_cases/validate_import.in/lib/hello.mbt
@@ -0,0 +1,3 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
diff --git a/crates/moon/tests/test_cases/validate_import.in/lib/hello_wbtest.mbt b/crates/moon/tests/test_cases/validate_import.in/lib/hello_wbtest.mbt
new file mode 100644
index 00000000..64f26429
--- /dev/null
+++ b/crates/moon/tests/test_cases/validate_import.in/lib/hello_wbtest.mbt
@@ -0,0 +1,5 @@
+test "hello" {
+  if hello() != "Hello, world!" {
+    return Err("hello() != \"Hello, world!\"")
+  }
+}
diff --git a/crates/moon/tests/test_cases/validate_import.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/validate_import.in/lib/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/validate_import.in/lib/moon.pkg.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/validate_import.in/main/main.mbt b/crates/moon/tests/test_cases/validate_import.in/main/main.mbt
new file mode 100644
index 00000000..d25cb935
--- /dev/null
+++ b/crates/moon/tests/test_cases/validate_import.in/main/main.mbt
@@ -0,0 +1,3 @@
+fn main {
+  println(@lib.hello())
+}
diff --git a/crates/moon/tests/test_cases/validate_import.in/main/moon.pkg.json b/crates/moon/tests/test_cases/validate_import.in/main/moon.pkg.json
new file mode 100644
index 00000000..229e9f06
--- /dev/null
+++ b/crates/moon/tests/test_cases/validate_import.in/main/moon.pkg.json
@@ -0,0 +1,10 @@
+{
+  "is-main": true,
+  "import": [
+    "username/hello/lib",
+    "mbt/core/set"
+  ],
+  "wbtest-import": [
+    "mbt/core/x"
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/validate_import.in/moon.mod.json b/crates/moon/tests/test_cases/validate_import.in/moon.mod.json
new file mode 100644
index 00000000..80554ae2
--- /dev/null
+++ b/crates/moon/tests/test_cases/validate_import.in/moon.mod.json
@@ -0,0 +1,9 @@
+{
+  "name": "username/hello",
+  "version": "0.1.0",
+  "readme": "README.md",
+  "repository": "",
+  "license": "",
+  "keywords": [],
+  "description": ""
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/warn_list.in/.gitignore b/crates/moon/tests/test_cases/warn_list.in/.gitignore
new file mode 100644
index 00000000..b1283a74
--- /dev/null
+++ b/crates/moon/tests/test_cases/warn_list.in/.gitignore
@@ -0,0 +1,2 @@
+target/
+.mooncakes/
diff --git a/crates/moon/tests/test_cases/warn_list.in/README.md b/crates/moon/tests/test_cases/warn_list.in/README.md
new file mode 100644
index 00000000..ae00983f
--- /dev/null
+++ b/crates/moon/tests/test_cases/warn_list.in/README.md
@@ -0,0 +1 @@
+# username/hello
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/warn_list.in/lib/hello.mbt b/crates/moon/tests/test_cases/warn_list.in/lib/hello.mbt
new file mode 100644
index 00000000..5bc138f8
--- /dev/null
+++ b/crates/moon/tests/test_cases/warn_list.in/lib/hello.mbt
@@ -0,0 +1,4 @@
+pub fn hello() -> String {
+  let a = 0
+  "Hello, world!"
+}
diff --git a/crates/moon/tests/test_cases/warn_list.in/lib/moon.pkg.json b/crates/moon/tests/test_cases/warn_list.in/lib/moon.pkg.json
new file mode 100644
index 00000000..39a5e4ea
--- /dev/null
+++ b/crates/moon/tests/test_cases/warn_list.in/lib/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "warn-list": "-2"
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/warn_list.in/lib1/hello.mbt b/crates/moon/tests/test_cases/warn_list.in/lib1/hello.mbt
new file mode 100644
index 00000000..774951e8
--- /dev/null
+++ b/crates/moon/tests/test_cases/warn_list.in/lib1/hello.mbt
@@ -0,0 +1,7 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
+
+fn t() -> Unit {
+
+}
diff --git a/crates/moon/tests/test_cases/warn_list.in/lib1/moon.pkg.json b/crates/moon/tests/test_cases/warn_list.in/lib1/moon.pkg.json
new file mode 100644
index 00000000..bde61261
--- /dev/null
+++ b/crates/moon/tests/test_cases/warn_list.in/lib1/moon.pkg.json
@@ -0,0 +1,3 @@
+{
+  "warn-list": "-1"
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/warn_list.in/main/main.mbt b/crates/moon/tests/test_cases/warn_list.in/main/main.mbt
new file mode 100644
index 00000000..eb801f97
--- /dev/null
+++ b/crates/moon/tests/test_cases/warn_list.in/main/main.mbt
@@ -0,0 +1,7 @@
+fn main {
+  let a = 0
+}
+
+fn t() -> Unit {
+
+}
diff --git a/crates/moon/tests/test_cases/warn_list.in/main/moon.pkg.json b/crates/moon/tests/test_cases/warn_list.in/main/moon.pkg.json
new file mode 100644
index 00000000..e0088814
--- /dev/null
+++ b/crates/moon/tests/test_cases/warn_list.in/main/moon.pkg.json
@@ -0,0 +1,8 @@
+{
+  "is-main": true,
+  "import": [
+    "username/hello/lib",
+    "username/hello/lib1"
+  ],
+  "warn-list": "-1-2"
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/warn_list.in/moon.mod.json b/crates/moon/tests/test_cases/warn_list.in/moon.mod.json
new file mode 100644
index 00000000..80554ae2
--- /dev/null
+++ b/crates/moon/tests/test_cases/warn_list.in/moon.mod.json
@@ -0,0 +1,9 @@
+{
+  "name": "username/hello",
+  "version": "0.1.0",
+  "readme": "README.md",
+  "repository": "",
+  "license": "",
+  "keywords": [],
+  "description": ""
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/whitespace_test.in/.gitignore b/crates/moon/tests/test_cases/whitespace_test.in/.gitignore
new file mode 100644
index 00000000..b1283a74
--- /dev/null
+++ b/crates/moon/tests/test_cases/whitespace_test.in/.gitignore
@@ -0,0 +1,2 @@
+target/
+.mooncakes/
diff --git a/crates/moon/tests/test_cases/whitespace_test.in/README.md b/crates/moon/tests/test_cases/whitespace_test.in/README.md
new file mode 100644
index 00000000..ae00983f
--- /dev/null
+++ b/crates/moon/tests/test_cases/whitespace_test.in/README.md
@@ -0,0 +1 @@
+# username/hello
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/whitespace_test.in/main exe/main.mbt b/crates/moon/tests/test_cases/whitespace_test.in/main exe/main.mbt
new file mode 100644
index 00000000..d25cb935
--- /dev/null
+++ b/crates/moon/tests/test_cases/whitespace_test.in/main exe/main.mbt	
@@ -0,0 +1,3 @@
+fn main {
+  println(@lib.hello())
+}
diff --git a/crates/moon/tests/test_cases/whitespace_test.in/main exe/moon.pkg.json b/crates/moon/tests/test_cases/whitespace_test.in/main exe/moon.pkg.json
new file mode 100644
index 00000000..0ba6c360
--- /dev/null
+++ b/crates/moon/tests/test_cases/whitespace_test.in/main exe/moon.pkg.json	
@@ -0,0 +1,9 @@
+{
+  "is-main": true,
+  "import": [
+    {
+      "path": "username/hello/main lib",
+      "alias": "lib"
+    }
+  ]
+}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/whitespace_test.in/main lib/hello.mbt b/crates/moon/tests/test_cases/whitespace_test.in/main lib/hello.mbt
new file mode 100644
index 00000000..9012592a
--- /dev/null
+++ b/crates/moon/tests/test_cases/whitespace_test.in/main lib/hello.mbt	
@@ -0,0 +1,3 @@
+pub fn hello() -> String {
+  "Hello, world!"
+}
diff --git a/crates/moon/tests/test_cases/whitespace_test.in/main lib/hello_wbtest.mbt b/crates/moon/tests/test_cases/whitespace_test.in/main lib/hello_wbtest.mbt
new file mode 100644
index 00000000..85944a2c
--- /dev/null
+++ b/crates/moon/tests/test_cases/whitespace_test.in/main lib/hello_wbtest.mbt	
@@ -0,0 +1,5 @@
+test "hello" {
+  if hello() != "Hello, world!" {
+    raise "hello() != \"Hello, world!\""
+  }
+}
diff --git a/crates/moon/tests/test_cases/whitespace_test.in/main lib/moon.pkg.json b/crates/moon/tests/test_cases/whitespace_test.in/main lib/moon.pkg.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/crates/moon/tests/test_cases/whitespace_test.in/main lib/moon.pkg.json	
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/crates/moon/tests/test_cases/whitespace_test.in/moon.mod.json b/crates/moon/tests/test_cases/whitespace_test.in/moon.mod.json
new file mode 100644
index 00000000..80554ae2
--- /dev/null
+++ b/crates/moon/tests/test_cases/whitespace_test.in/moon.mod.json
@@ -0,0 +1,9 @@
+{
+  "name": "username/hello",
+  "version": "0.1.0",
+  "readme": "README.md",
+  "repository": "",
+  "license": "",
+  "keywords": [],
+  "description": ""
+}
\ No newline at end of file
diff --git a/crates/moonbuild/Cargo.toml b/crates/moonbuild/Cargo.toml
new file mode 100644
index 00000000..929d27f6
--- /dev/null
+++ b/crates/moonbuild/Cargo.toml
@@ -0,0 +1,47 @@
+[package]
+name = "moonbuild"
+version = "0.1.0"
+edition.workspace = true
+rust-version.workspace = true
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+moonutil.workspace = true
+mooncake.workspace = true
+n2.workspace = true
+clap.workspace = true
+serde.workspace = true
+serde_json_lenient.workspace = true
+anyhow.workspace = true
+colored.workspace = true
+dunce.workspace = true
+indexmap.workspace = true
+notify.workspace = true
+petgraph.workspace = true
+walkdir.workspace = true
+tempfile.workspace = true
+ctrlc.workspace = true
+dissimilar.workspace = true
+line-index.workspace = true
+home.workspace = true
+tokio.workspace = true
+self-replace.workspace = true
+sysinfo.workspace = true
+text-size.workspace = true
+log.workspace = true
+hyper.workspace = true
+hyper-util.workspace = true
+hyper-staticfile.workspace = true
+http.workspace = true
+dialoguer.workspace = true
+futures.workspace = true
+reqwest.workspace = true
+console.workspace = true
+semver.workspace = true
+chrono.workspace = true
+zip.workspace = true
+thiserror.workspace = true
+
+[dev-dependencies]
+expect-test.workspace = true
diff --git a/crates/moonbuild/src/README.md b/crates/moonbuild/src/README.md
new file mode 100644
index 00000000..b87d0718
--- /dev/null
+++ b/crates/moonbuild/src/README.md
@@ -0,0 +1,28 @@
+
+## Tests
+
+### Running Tests
+
+To run all tests, use the following command:
+
+```bash
+cargo test
+```
+
+### Promoting New Test Results
+
+If you have made changes to the code that cause test failures, you can use the following command to promote new test results:
+
+```bash
+env UPDATE_EXPECT=1 cargo test
+```
+
+This command will update the expected test results to match the actual results. Use this command with caution, as it can lead to unexpected behavior if used incorrectly.
+
+
+## Generate `lexer.rs`
+`lexer.rs` is generated by re2c 3.0 by using the following command:
+
+```bash
+re2rust ./lexer.re2c --tags --output lexer.rs
+```
diff --git a/crates/moonbuild/src/bench.rs b/crates/moonbuild/src/bench.rs
new file mode 100644
index 00000000..2901ed6f
--- /dev/null
+++ b/crates/moonbuild/src/bench.rs
@@ -0,0 +1,173 @@
+use indexmap::IndexMap;
+use moonutil::common::*;
+use moonutil::module::MoonModJSON;
+use moonutil::package::{MoonPkgJSON, PkgJSONImport};
+use std::fs;
+use std::path::Path;
+
+#[derive(Default)]
+pub struct Config {
+    pub dir_rows: u32,
+    pub dir_cols: u32,
+    pub mod_rows: u32,
+    pub mod_cols: u32,
+    comment_size: u32,
+}
+
+impl Config {
+    pub fn new() -> Self {
+        Config {
+            dir_rows: 1,
+            dir_cols: 1,
+            mod_rows: 1,
+            mod_cols: 1,
+            comment_size: 5000,
+        }
+    }
+}
+
+fn write_directory(config: &Config, base_dir: &Path, dr: u32, dc: u32) {
+    let dir_name = base_dir.join(format!("dir_{}_{}", dr, dc));
+    fs::create_dir_all(&dir_name).unwrap();
+
+    for mr in 0..config.mod_rows {
+        for mc in 0..config.mod_cols {
+            let mut deps = Vec::new();
+            if mr == 0 {
+                if dr == 0 {
+                    // nothing to do
+                } else {
+                    for k in 0..config.mod_cols {
+                        for j in 0..config.dir_cols {
+                            deps.push((dr - 1, j, config.mod_rows - 1, k));
+                        }
+                    }
+                }
+            } else {
+                for k in 0..config.mod_rows {
+                    deps.push((dr, dc, mr - 1, k));
+                }
+            }
+
+            let mut dep_str = String::new();
+            for d in deps.iter() {
+                dep_str.push_str(&format!("  @m_{}_{}_{}_{}.f()\n", d.0, d.1, d.2, d.3));
+            }
+
+            let mod_content = format!(
+                r#"// {} //
+pub fn f() -> Unit {{
+{}}}
+"#,
+                "X".repeat(config.comment_size as usize),
+                dep_str,
+            );
+            let mod_name = dir_name.join(format!("m_{}_{}_{}_{}", dr, dc, mr, mc));
+            fs::create_dir_all(&mod_name).unwrap();
+            let mod_main = mod_name.join("main.mbt");
+            fs::write(&mod_main, mod_content).unwrap();
+            let moon_pkg = mod_name.join(MOON_PKG_JSON);
+            let mut import: IndexMap<String, Option<String>> = IndexMap::new();
+            for d in deps.iter() {
+                import.insert(
+                    format!(
+                        "build_matrix/dir_{}_{}/m_{}_{}_{}_{}",
+                        d.0, d.1, d.0, d.1, d.2, d.3
+                    ),
+                    Some("".into()),
+                );
+            }
+            let pkg = MoonPkgJSON {
+                name: None,
+                is_main: None,
+                import: if import.is_empty() {
+                    None
+                } else {
+                    Some(PkgJSONImport::Map(import))
+                },
+                wbtest_import: None,
+                test_import: None,
+                link: None,
+                warn_list: None,
+                alert_list: None,
+            };
+            moonutil::common::write_package_json_to_file(&pkg, &moon_pkg).unwrap();
+        }
+    }
+}
+
+pub fn write(config: &Config, base_dir: &Path) {
+    for row in 0..config.dir_rows {
+        for col in 0..config.dir_cols {
+            write_directory(config, base_dir, row, col);
+        }
+    }
+
+    let module = MoonModJSON {
+        name: "build_matrix".to_string(),
+        version: None,
+        deps: None,
+        readme: None,
+        repository: None,
+        license: None,
+        keywords: None,
+        description: None,
+
+        compile_flags: None,
+        link_flags: None,
+        checksum: None,
+        ext: Default::default(),
+    };
+    moonutil::common::write_module_json_to_file(&module, base_dir).unwrap();
+    fs::create_dir_all(base_dir.join("main")).unwrap();
+    let mut main_content = String::new();
+    main_content.push_str("fn main {\n");
+    for dr in 0..config.dir_rows {
+        for dc in 0..config.dir_cols {
+            for mr in 0..config.mod_rows {
+                for mc in 0..config.mod_cols {
+                    main_content.push_str(&format!("    let _ = @m_{dr}_{dc}_{mr}_{mc}.f\n"));
+                }
+            }
+        }
+    }
+    main_content.push_str("    println(\"ok\")\n");
+    main_content.push_str("}\n");
+
+    fs::write(base_dir.join("main").join("main.mbt"), main_content).unwrap();
+
+    let mut import = IndexMap::new();
+    for dr in 0..config.dir_rows {
+        for dc in 0..config.dir_cols {
+            for mr in 0..config.mod_rows {
+                for mc in 0..config.mod_cols {
+                    import.insert(
+                        format!(
+                            "build_matrix/dir_{}_{}/m_{}_{}_{}_{}",
+                            dr, dc, dr, dc, mr, mc
+                        ),
+                        Some("".to_string()),
+                    );
+                }
+            }
+        }
+    }
+
+    let pkg = MoonPkgJSON {
+        name: None,
+        is_main: Some(true),
+        import: if import.is_empty() {
+            None
+        } else {
+            Some(PkgJSONImport::Map(import))
+        },
+        wbtest_import: None,
+        test_import: None,
+        link: None,
+        warn_list: None,
+        alert_list: None,
+    };
+
+    moonutil::common::write_package_json_to_file(&pkg, &base_dir.join("main").join(MOON_PKG_JSON))
+        .unwrap();
+}
diff --git a/crates/moonbuild/src/build.rs b/crates/moonbuild/src/build.rs
new file mode 100644
index 00000000..ea56e74c
--- /dev/null
+++ b/crates/moonbuild/src/build.rs
@@ -0,0 +1,73 @@
+use super::gen;
+use anyhow::{bail, Context};
+use moonutil::common::MoonbuildOpt;
+use moonutil::module::ModuleDB;
+use n2::load::State;
+use std::path::Path;
+use std::process::{Command, Stdio};
+
+use moonutil::common::MooncOpt;
+
+pub fn load_moon_proj(
+    module: &ModuleDB,
+    moonc_opt: &MooncOpt,
+    moonbuild_opt: &MoonbuildOpt,
+) -> anyhow::Result<State> {
+    let target_dir = &moonbuild_opt.target_dir;
+
+    let mut contain_link_item = false;
+    for (_, pkg) in module.packages.iter() {
+        if pkg.is_main || pkg.need_link {
+            contain_link_item = true;
+            break;
+        }
+    }
+    if !contain_link_item {
+        anyhow::bail!("no package need to be linked in the project")
+    }
+
+    log::debug!("module: {:#?}", module);
+    let n2_input = gen::gen_build::gen_build(module, moonc_opt, moonbuild_opt)?;
+    log::debug!("n2_input: {:#?}", n2_input);
+    gen::gen_build::gen_n2_build_state(&n2_input, target_dir, moonc_opt, moonbuild_opt)
+}
+
+pub fn run_wat(path: &Path, args: &[String]) -> anyhow::Result<()> {
+    run("moonrun", path, args)
+}
+
+pub fn run_js(path: &Path, args: &[String]) -> anyhow::Result<()> {
+    if !args.is_empty() {
+        bail!(format!(
+            "js backend does not support extra args for now {:?}",
+            args
+        ))
+    }
+    run("node", path, args)
+}
+
+fn run(command: &str, path: &Path, args: &[String]) -> anyhow::Result<()> {
+    let mut execution = Command::new(command)
+        .arg(path)
+        .arg("--")
+        .args(args)
+        .stdout(Stdio::inherit())
+        .stderr(Stdio::inherit())
+        .spawn()
+        .context(format!(
+            "failed to execute: {} {} {}",
+            command,
+            path.display(),
+            if args.is_empty() {
+                "".to_string()
+            } else {
+                format!("-- {}", args.join(" "))
+            }
+        ))?;
+    let status = execution.wait()?;
+    if status.success() {
+        Ok(())
+    } else {
+        anyhow::bail!("failed to run")
+    }
+}
diff --git a/crates/moonbuild/src/bundle.rs b/crates/moonbuild/src/bundle.rs
new file mode 100644
index 00000000..903b8ee9
--- /dev/null
+++ b/crates/moonbuild/src/bundle.rs
@@ -0,0 +1,23 @@
+use n2::load::State;
+
+use moonutil::{
+    common::{MoonbuildOpt, MooncOpt},
+    module::ModuleDB,
+};
+
+pub fn load_moon_proj(
+    module: &ModuleDB,
+    moonc_opt: &MooncOpt,
+    moonbuild_opt: &MoonbuildOpt,
+) -> anyhow::Result<State> {
+    let target_dir = &moonbuild_opt.target_dir;
+    if !target_dir.exists() {
+        std::fs::create_dir_all(target_dir)?;
+    }
+
+    log::debug!("{:#?}", module);
+
+    let input = super::gen::gen_bundle::gen_bundle(module, moonc_opt, moonbuild_opt)?;
+    log::debug!("{:#?}", input);
+    super::gen::gen_bundle::gen_n2_bundle_state(&input, target_dir, moonc_opt, moonbuild_opt)
+}
diff --git a/crates/moonbuild/src/check/mod.rs b/crates/moonbuild/src/check/mod.rs
new file mode 100644
index 00000000..9064dda8
--- /dev/null
+++ b/crates/moonbuild/src/check/mod.rs
@@ -0,0 +1,2 @@
+pub mod normal;
+pub mod watch;
diff --git a/crates/moonbuild/src/check/normal.rs b/crates/moonbuild/src/check/normal.rs
new file mode 100644
index 00000000..3b0641d7
--- /dev/null
+++ b/crates/moonbuild/src/check/normal.rs
@@ -0,0 +1,75 @@
+use anyhow::Context;
+
+use moonutil::common::{MoonbuildOpt, MooncOpt};
+use moonutil::module::{convert_mdb_to_json, ModuleDB, ModuleDBJSON};
+use n2::load::State;
+use std::io::BufWriter;
+use std::io::Write;
+use std::path::Path;
+use std::path::PathBuf;
+
+pub fn write_pkg_lst(module: &ModuleDB, target_dir: &Path) -> anyhow::Result<()> {
+    let create_and_write =
+        |pkg_json_path: PathBuf, new_module_db_content: &ModuleDBJSON| -> anyhow::Result<()> {
+            let fp = std::fs::File::create(pkg_json_path).context(format!(
+                "failed to create `{}/packages.json`",
+                target_dir.display()
+            ))?;
+            let mut writer = BufWriter::new(fp);
+            let data = serde_json_lenient::to_vec_pretty(new_module_db_content)
+                .context("failed to serialize packages list")?;
+            writer.write_all(&data)?;
+
+            Ok(())
+        };
+
+    let mj = convert_mdb_to_json(module);
+    let pkg_json = target_dir.join("packages.json");
+
+    // if the file exist and the old content is the same as the new content in `module`, don't rewrite it
+    // otherwise we create and write
+    if pkg_json.exists() {
+        match std::fs::File::open(&pkg_json) {
+            Ok(old_pkg_json_file) => {
+                let old_pkg_json = serde_json_lenient::from_reader::<_, ModuleDBJSON>(
+                    std::io::BufReader::new(old_pkg_json_file),
+                );
+                match old_pkg_json {
+                    Ok(old_pkg_json) if old_pkg_json == mj => {
+                        log::debug!(
+                            "content of {} is the same, skip writing",
+                            pkg_json.display()
+                        );
+                        Ok(())
+                    }
+                    _ => {
+                        log::debug!("content of {} change, rewriting", pkg_json.display());
+                        create_and_write(pkg_json, &mj)
+                    }
+                }
+            }
+            Err(_) => create_and_write(pkg_json, &mj),
+        }
+    } else {
+        log::debug!("{} don't exist, try to create it", pkg_json.display());
+        create_and_write(pkg_json, &mj)
+    }
+}
+
+pub fn load_moon_proj(
+    module: &ModuleDB,
+    moonc_opt: &MooncOpt,
+    moonbuild_opt: &MoonbuildOpt,
+) -> anyhow::Result<State> {
+    let target_dir = &moonbuild_opt.target_dir;
+
+    log::debug!("module: {:#?}", module);
+    let n2_input = super::super::gen::gen_check::gen_check(module, moonc_opt, moonbuild_opt)?;
+    log::debug!("n2_input: {:#?}", n2_input);
+    super::super::gen::gen_check::gen_n2_check_state(
+        &n2_input,
+        target_dir,
+        moonc_opt,
+        moonbuild_opt,
+    )
+}
diff --git a/crates/moonbuild/src/check/watch.rs b/crates/moonbuild/src/check/watch.rs
new file mode 100644
index 00000000..0fc5f3e7
--- /dev/null
+++ b/crates/moonbuild/src/check/watch.rs
@@ -0,0 +1,137 @@
+use anyhow::{anyhow, Context};
+use colored::*;
+use mooncake::pkg::sync::auto_sync;
+use moonutil::module::ModuleDB;
+use moonutil::mooncakes::sync::AutoSyncFlags;
+use moonutil::mooncakes::RegistryConfig;
+use notify::{Config, RecommendedWatcher, RecursiveMode, Watcher};
+
+use crate::{bail_moon_check_is_running, write_current_pid, MOON_PID_NAME};
+use moonutil::common::{MoonbuildOpt, MooncOpt};
+use std::fs::remove_file;
+use std::sync::atomic::{AtomicBool, Ordering};
+use std::sync::Arc;
+
+pub fn watch_single_thread(
+    moonc_opt: &MooncOpt,
+    moonbuild_opt: &MoonbuildOpt,
+    registry_config: &RegistryConfig,
+    module: &ModuleDB,
+) -> anyhow::Result<i32> {
+    let (source_dir, target_dir) = (&moonbuild_opt.source_dir, &moonbuild_opt.target_dir);
+
+    let pid_path = target_dir.join(MOON_PID_NAME);
+    if pid_path.exists() {
+        bail_moon_check_is_running(&pid_path)?;
+    }
+    write_current_pid(target_dir, &pid_path)?;
+    print!("{esc}[2J{esc}[1;1H", esc = 27 as char);
+    let result = crate::entry::run_check(moonc_opt, moonbuild_opt, module);
+    match result {
+        Ok(0) => {
+            println!(
+                "{}",
+                "Success, waiting for filesystem changes...".green().bold()
+            );
+        }
+        Err(e) => {
+            println!(
+                "{:?}\n{}",
+                e,
+                "Had errors, waiting for filesystem changes...".red().bold(),
+            );
+        }
+        _ => {
+            println!(
+                "{}",
+                "Had errors, waiting for filesystem changes...".red().bold(),
+            );
+        }
+    }
+    let (tx, rx) = std::sync::mpsc::channel();
+    let tx_for_exit = tx.clone();
+    let mut watcher = RecommendedWatcher::new(tx, Config::default())?;
+
+    let exit_flag = Arc::new(AtomicBool::new(false));
+    {
+        let r = exit_flag.clone();
+        ctrlc::set_handler(move || {
+            let exit_signal = notify::Event::new(notify::EventKind::Other);
+            r.store(true, Ordering::SeqCst);
+            let _ = tx_for_exit.send(Ok(exit_signal));
+        })
+        .expect("Error setting Ctrl-C handler");
+    }
+
+    {
+        // main thread
+        let exit_flag = exit_flag.clone();
+        watcher.watch(source_dir, RecursiveMode::Recursive)?;
+        for res in rx {
+            match res {
+                Ok(event) => {
+                    {
+                        if event.kind == notify::EventKind::Other
+                            && exit_flag.load(Ordering::SeqCst)
+                        {
+                            break;
+                        }
+                    }
+
+                    let all_in_target = event.paths.iter().all(|p| p.starts_with(target_dir));
+                    if all_in_target {
+                        continue;
+                    }
+
+                    if !target_dir.exists() {
+                        std::fs::create_dir_all(target_dir)
+                            .context("failed to create target dir")?;
+                    }
+
+                    print!("{esc}[2J{esc}[1;1H", esc = 27 as char);
+                    // we need to get the latest ModuleDB when we call run_check in watch mode
+                    let (resolved_env, dir_sync_result) = auto_sync(
+                        source_dir,
+                        &AutoSyncFlags { frozen: false },
+                        registry_config,
+                        false,
+                    )?;
+                    let module = &moonutil::scan::scan(
+                        false,
+                        &resolved_env,
+                        &dir_sync_result,
+                        moonc_opt,
+                        moonbuild_opt,
+                    )?;
+                    let result = crate::entry::run_check(moonc_opt, moonbuild_opt, module);
+                    match result {
+                        Ok(0) => {
+                            println!(
+                                "{}",
+                                "Success, waiting for filesystem changes...".green().bold()
+                            );
+                        }
+                        Err(e) => {
+                            println!(
+                                "{:?}\n{}",
+                                e,
+                                "Had errors, waiting for filesystem changes...".red().bold(),
+                            );
+                        }
+                        _ => {
+                            println!(
+                                "{}",
+                                "Had errors, waiting for filesystem changes...".red().bold(),
+                            );
+                        }
+                    }
+                }
+                Err(e) => {
+                    return Err(anyhow!(e));
+                }
+            }
+        }
+    }
+    remove_file(&pid_path).unwrap_or_default();
+    Ok(0)
+}
diff --git a/crates/moonbuild/src/doc_http.rs b/crates/moonbuild/src/doc_http.rs
new file mode 100644
index 00000000..f2bc02ae
--- /dev/null
+++ b/crates/moonbuild/src/doc_http.rs
@@ -0,0 +1,76 @@
+use std::io::Error as IoError;
+use std::net::SocketAddr;
+use std::path::PathBuf;
+
+use anyhow::Context;
+use colored::Colorize;
+use http::response::Builder as ResponseBuilder;
+use http::{header, StatusCode};
+use hyper::service::service_fn;
+use hyper::{Request, Response};
+use hyper_staticfile::{Body, Static};
+use hyper_util::rt::TokioIo;
+use tokio::net::TcpListener;
+use tokio::runtime::Runtime;
+
+async fn handle_request<B>(req: Request<B>, static_: Static) -> Result<Response<Body>, IoError> {
+    if req.uri().path() == "/" {
+        let res = ResponseBuilder::new()
+            .status(StatusCode::MOVED_PERMANENTLY)
+            .header(header::LOCATION, "/index.html#/")
+            .body(Body::Empty)
+            .expect("unable to build response");
+        Ok(res)
+    } else {
+        static_.clone().serve(req).await
+    }
+}
+
+pub fn start_server(
+    root_dir: impl Into<PathBuf>,
+    cake_full_name: &str,
+    bind: String,
+    port: u16,
+) -> anyhow::Result<()> {
+    let runtime = Runtime::new()?;
+    runtime.block_on(async {
+        let static_ = Static::new(root_dir);
+
+        let addr = format!("{}:{}", bind, port)
+            .parse::<SocketAddr>()
+            .context(format!("failed to parse address {}:{}", bind, port))?;
+
+        let listener = TcpListener::bind(addr)
+            .await
+            .context(format!("failed to bind to address {}", addr))?;
+
+        eprintln!(
+            "{}",
+            format!(
+                "Doc server running on http://{}/index.html#/{}/",
+                addr, cake_full_name
+            )
+            .bold()
+            .green()
+        );
+        loop {
+            let (stream, _) = listener
+                .accept()
+                .await
+                .expect("Failed to accept TCP connection");
+
+            let static_ = static_.clone();
+            tokio::spawn(async move {
+                if let Err(err) = hyper::server::conn::http1::Builder::new()
+                    .serve_connection(
+                        TokioIo::new(stream),
+                        service_fn(move |req| handle_request(req, static_.clone())),
+                    )
+                    .await
+                {
+                    eprintln!("Error serving connection: {:?}", err);
+                }
+            });
+        }
+    })
+}
diff --git a/crates/moonbuild/src/dry_run.rs b/crates/moonbuild/src/dry_run.rs
new file mode 100644
index 00000000..0a30122a
--- /dev/null
+++ b/crates/moonbuild/src/dry_run.rs
@@ -0,0 +1,100 @@
+use moonutil::module::ModuleDB;
+use n2::densemap::Index;
+use n2::graph::{BuildId, FileId, Graph};
+use std::collections::VecDeque;
+
+use moonutil::common::{MoonbuildOpt, MooncOpt, RunMode, TargetBackend};
+
+pub fn print_commands(
+    module: &ModuleDB,
+    moonc_opt: &MooncOpt,
+    moonbuild_opt: &MoonbuildOpt,
+) -> anyhow::Result<i32> {
+    let moonc_opt = &MooncOpt {
+        render: false,
+        ..moonc_opt.clone()
+    };
+
+    let (source_dir, target_dir) = (&moonbuild_opt.source_dir, &moonbuild_opt.target_dir);
+
+    let in_same_dir = target_dir.starts_with(source_dir);
+    let mode = moonbuild_opt.run_mode;
+
+    let state = match mode {
+        RunMode::Build | RunMode::Run => {
+            crate::build::load_moon_proj(module, moonc_opt, moonbuild_opt)?
+        }
+        RunMode::Check => crate::check::normal::load_moon_proj(module, moonc_opt, moonbuild_opt)?,
+        RunMode::Test => crate::runtest::load_moon_proj(module, moonc_opt, moonbuild_opt)?,
+        RunMode::Bundle => crate::bundle::load_moon_proj(module, moonc_opt, moonbuild_opt)?,
+        RunMode::Format => crate::fmt::load_moon_proj(module, moonc_opt, moonbuild_opt)?,
+    };
+    log::debug!("{:#?}", state);
+    let mut builds: VecDeque<BuildId> = VecDeque::new();
+    if !state.default.is_empty() {
+        let mut sorted_default = state.default.clone();
+        sorted_default.sort_by_key(|a| a.index());
+        let mut queue: VecDeque<FileId> = VecDeque::new();
+        for target in sorted_default.iter() {
+            queue.push_back(*target);
+            bfs_graph(&state.graph, &mut queue, &mut builds);
+            queue.clear();
+        }
+        for b in builds.iter().rev() {
+            let build = &state.graph.builds[*b];
+            if let Some(cmdline) = &build.cmdline {
+                if in_same_dir {
+                    // TODO: this replace is not safe
+                    println!(
+                        "{}",
+                        cmdline.replace(&source_dir.display().to_string(), ".")
+                    );
+                } else {
+                    println!("{}", cmdline);
+                }
+            }
+        }
+        if mode == RunMode::Run {
+            for fid in sorted_default.iter() {
+                let mut watfile = state.graph.file(*fid).name.clone();
+                let cmd = match moonc_opt.link_opt.target_backend {
+                    TargetBackend::Wasm => "moonrun",
+                    TargetBackend::WasmGC => "moonrun",
+                    TargetBackend::Js => "node",
+                };
+                if in_same_dir {
+                    watfile = watfile.replacen(&source_dir.display().to_string(), ".", 1);
+                }
+
+                let mut moonrun_command = format!("{cmd} {watfile}");
+                if !moonbuild_opt.args.is_empty() {
+                    moonrun_command =
+                        format!("{moonrun_command} -- {}", moonbuild_opt.args.join(" "));
+                }
+
+                println!("{moonrun_command}");
+            }
+        }
+    }
+    Ok(0)
+}
+
+fn bfs_graph(graph: &Graph, queue: &mut VecDeque<FileId>, builds: &mut VecDeque<BuildId>) {
+    while !queue.is_empty() {
+        let file_id = queue.pop_front().unwrap();
+        if let Some(bid) = graph.file(file_id).input {
+            if !builds.contains(&bid) {
+                builds.push_back(bid);
+            } else {
+                builds.retain(|id| &bid != id);
+                builds.push_back(bid);
+            }
+            let build = &graph.builds[bid];
+            for &fid in build.explicit_ins().iter().rev() {
+                if !queue.contains(&fid) {
+                    queue.push_back(fid);
+                }
+            }
+        }
+    }
+}
diff --git a/crates/moonbuild/src/entry.rs b/crates/moonbuild/src/entry.rs
new file mode 100644
index 00000000..642e9ea3
--- /dev/null
+++ b/crates/moonbuild/src/entry.rs
@@ -0,0 +1,461 @@
+use moonutil::module::ModuleDB;
+use n2::progress::{DumbConsoleProgress, FancyConsoleProgress, Progress};
+use n2::terminal;
+use std::io::{BufRead, Write};
+use std::path::{Path, PathBuf};
+use std::process::{Command, Stdio};
+use thiserror::Error;
+
+use n2::{trace, work};
+
+use anyhow::{anyhow, Context};
+use colored::Colorize;
+
+use crate::check::normal::write_pkg_lst;
+
+use moonutil::common::{is_slash, MoonbuildOpt, MooncOpt, TargetBackend};
+
+use std::sync::{Arc, Mutex};
+
+fn default_parallelism() -> anyhow::Result<usize> {
+    let par = std::thread::available_parallelism()?;
+    Ok(usize::from(par))
+}
+
+#[allow(clippy::type_complexity)]
+fn create_progress_console(callback: Option<Box<dyn Fn(&str) + Send>>) -> Box<dyn Progress> {
+    if terminal::use_fancy() {
+        Box::new(FancyConsoleProgress::new(false, callback))
+    } else {
+        Box::new(DumbConsoleProgress::new(false, callback))
+    }
+}
+
+fn render_result(result: Option<usize>, quiet: bool, mode: &str) -> anyhow::Result<i32> {
+    match result {
+        None => {
+            // Don't print any summary, the failing task is enough info.
+            anyhow::bail!(format!("failed when {}", mode));
+        }
+        Some(0) => {
+            // Special case: don't print numbers when no work done.
+            if !quiet {
+                println!("{} moon: no work to do", "Finished.".bright_green().bold());
+            }
+            Ok(0)
+        }
+        Some(n) => {
+            if !quiet {
+                println!(
+                    "{} moon: ran {} task{}, now up to date",
+                    "Finished.".bright_green().bold(),
+                    n,
+                    if n == 1 { "" } else { "s" }
+                );
+            }
+            Ok(0)
+        }
+    }
+}
+
+pub fn n2_run_interface(
+    state: n2::load::State,
+    output_path: PathBuf,
+) -> anyhow::Result<Option<usize>> {
+    let logger = Arc::new(Mutex::new(vec![]));
+    let use_fancy = terminal::use_fancy();
+
+    let catcher = logger.clone();
+    let render_and_catch = move |output: &str| {
+        output
+            .split('\n')
+            .filter(|it| !it.is_empty())
+            .for_each(|content| {
+                catcher.lock().unwrap().push(content.to_owned());
+                moonutil::render::MooncDiagnostic::render(content, use_fancy);
+            });
+    };
+
+    let mut progress = create_progress_console(Some(Box::new(render_and_catch)));
+    let options = work::Options {
+        parallelism: default_parallelism()?,
+        failures_left: Some(10),
+        explain: false,
+        adopt: false,
+    };
+    let mut work = work::Work::new(
+        state.graph,
+        state.hashes,
+        state.db,
+        &options,
+        progress.as_mut(),
+        state.pools,
+    );
+
+    if !state.default.is_empty() {
+        for target in state.default {
+            work.want_file(target)?;
+        }
+    } else {
+        anyhow::bail!("no path specified and no default");
+    }
+
+    let res = trace::scope("work.run", || work.run())?;
+
+    if let Some(0) = res {
+        // if no work to do, then do not rewrite (build | check | test ...).output
+        // instead, read it and print
+        let raw_json = std::fs::read_to_string(&output_path)
+            .context(format!("failed to open `{}`", output_path.display()))?;
+
+        raw_json
+            .split('\n')
+            .filter(|it| !it.is_empty())
+            .for_each(|content| {
+                moonutil::render::MooncDiagnostic::render(content, use_fancy);
+            });
+    } else {
+        let mut output_file = std::fs::File::create(output_path)?;
+
+        for item in logger.lock().unwrap().iter() {
+            output_file.write_all(item.as_bytes())?;
+            output_file.write_all("\n".as_bytes())?;
+        }
+    }
+
+    Ok(res)
+}
+
+pub fn run_check(
+    moonc_opt: &MooncOpt,
+    moonbuild_opt: &MoonbuildOpt,
+    module: &ModuleDB,
+) -> anyhow::Result<i32> {
+    let state = trace::scope("moonbit::check::read", || {
+        crate::check::normal::load_moon_proj(module, moonc_opt, moonbuild_opt)
+    })?;
+
+    let result = n2_run_interface(state, moonbuild_opt.target_dir.join("check.output"))?;
+
+    match result {
+        Some(0) => {}
+        _ => {
+            write_pkg_lst(module, &moonbuild_opt.target_dir)?;
+        }
+    }
+    render_result(result, moonbuild_opt.quiet, "checking")
+}
+
+pub fn run_build(
+    moonc_opt: &MooncOpt,
+    moonbuild_opt: &MoonbuildOpt,
+    module: &ModuleDB,
+) -> anyhow::Result<i32> {
+    let state = trace::scope("moonbit::build::read", || {
+        crate::build::load_moon_proj(module, moonc_opt, moonbuild_opt)
+    })?;
+    let result = n2_run_interface(state, moonbuild_opt.target_dir.join("build.output"))?;
+    render_result(result, moonbuild_opt.quiet, "building")
+}
+
+pub fn run_run(
+    package_path: Option<&String>,
+    moonc_opt: &MooncOpt,
+    moonbuild_opt: &MoonbuildOpt,
+    module: &ModuleDB,
+) -> anyhow::Result<i32> {
+    run_build(moonc_opt, moonbuild_opt, module)?;
+    let (source_dir, target_dir) = (&moonbuild_opt.source_dir, &moonbuild_opt.target_dir);
+    let package_path = package_path
+        .unwrap()
+        .trim_start_matches("./")
+        .trim_start_matches(".\\")
+        .trim_end_matches(is_slash);
+
+    let (package_path, last_name): (PathBuf, String) =
+        if package_path.is_empty() || package_path == "." {
+            let module = moonutil::common::read_module_desc_file_in_dir(source_dir)?;
+            let p = std::path::PathBuf::from(module.name);
+            (
+                PathBuf::from("./"),
+                p.file_name().unwrap().to_str().unwrap().into(),
+            )
+        } else {
+            let package_path = std::path::PathBuf::from(package_path);
+            let last_name = package_path.file_name().unwrap().to_str().unwrap();
+            (package_path.clone(), last_name.into())
+        };
+
+    let wat_path = target_dir.join(package_path).join(format!(
+        "{}.{}",
+        last_name,
+        moonc_opt.link_opt.output_format.to_str()
+    ));
+    let wat_path = dunce::canonicalize(&wat_path)
+        .context(format!("cannot find wat file at `{:?}`", &wat_path))?;
+    trace::scope("run", || {
+        if moonc_opt.link_opt.target_backend == TargetBackend::Wasm
+            || moonc_opt.link_opt.target_backend == TargetBackend::WasmGC
+        {
+            crate::build::run_wat(&wat_path, &moonbuild_opt.args)
+        } else {
+            crate::build::run_js(&wat_path, &moonbuild_opt.args)
+        }
+    })?;
+    Ok(0)
+}
+
+#[derive(Debug, Error)]
+pub enum TestFailedStatus {
+    #[error("{0}")]
+    ApplyExpectFailed(TestResult),
+
+    #[error("{0}")]
+    ExpectTestFailed(TestResult),
+
+    #[error("{0}")]
+    Failed(TestResult),
+
+    #[error("{0}")]
+    RuntimeError(TestResult),
+
+    #[error("{0:?}")]
+    Others(#[from] anyhow::Error),
+}
+
+impl From<TestFailedStatus> for i32 {
+    fn from(value: TestFailedStatus) -> Self {
+        match value {
+            TestFailedStatus::ApplyExpectFailed(_) => 1,
+            TestFailedStatus::ExpectTestFailed(_) => 2,
+            TestFailedStatus::Failed(_) => 3,
+            TestFailedStatus::RuntimeError(_) => 4,
+            TestFailedStatus::Others(_) => 5,
+        }
+    }
+}
+
+#[derive(Debug, Default)]
+pub struct TestResult {
+    pub passed: u32,
+    pub failed: u32,
+}
+
+impl std::fmt::Display for TestResult {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "passed: {}, failed: {}", self.passed, self.failed)
+    }
+}
+
+#[allow(clippy::too_many_arguments)]
+pub fn run_test(
+    moonc_opt: &MooncOpt,
+    moonbuild_opt: &MoonbuildOpt,
+    build_only: bool,
+    test_verbose_output: bool,
+    auto_update: bool,
+    module: &ModuleDB,
+) -> anyhow::Result<TestResult, TestFailedStatus> {
+    let target_dir = &moonbuild_opt.target_dir;
+    let state = crate::runtest::load_moon_proj(module, moonc_opt, moonbuild_opt)?;
+    let result = n2_run_interface(state, moonbuild_opt.target_dir.join("test.output"))?;
+    render_result(result, moonbuild_opt.quiet, "testing")?;
+
+    if build_only {
+        return Ok(TestResult::default());
+    }
+
+    let state = crate::runtest::load_moon_proj(module, moonc_opt, moonbuild_opt)?;
+    let mut defaults: Vec<&String> = state
+        .default
+        .iter()
+        .map(|fid| &state.graph.file(*fid).name)
+        .collect();
+    if moonbuild_opt.sort_input {
+        #[cfg(unix)]
+        {
+            defaults.sort();
+        }
+        #[cfg(windows)]
+        {
+            let normal_slash = defaults
+                .iter()
+                .enumerate()
+                .map(|s| (s.0, s.1.replace('\\', "/")))
+                .collect::<Vec<(usize, String)>>();
+            let mut new_defaults = defaults.clone();
+            for (i, (j, _)) in normal_slash.iter().enumerate() {
+                new_defaults[i] = defaults[*j];
+            }
+            defaults = new_defaults;
+        }
+    }
+
+    let mut passed = 0;
+    let mut failed = 0;
+    let mut runtime_error = false;
+    let mut expect_failed = false;
+    let mut apply_expect_failed = false;
+
+    for d in defaults.iter() {
+        let p = Path::new(d);
+
+        match p.extension() {
+            Some(name) if name == moonc_opt.link_opt.output_format.to_str() => {
+                let result = trace::scope("test", || {
+                    if moonc_opt.link_opt.target_backend == TargetBackend::Wasm
+                        || moonc_opt.link_opt.target_backend == TargetBackend::WasmGC
+                    {
+                        crate::runtest::run_wat(p, target_dir)
+                    } else {
+                        crate::runtest::run_js(p, target_dir)
+                    }
+                });
+
+                if result.is_err() {
+                    let e = result.err().unwrap();
+                    eprintln!("Error when running {}: {}", d, e);
+                    runtime_error = true;
+                } else {
+                    let r = result.unwrap();
+                    if r.messages
+                        .iter()
+                        .any(|msg| msg.starts_with(super::expect::EXPECT_FAILED))
+                    {
+                        expect_failed = true;
+                    }
+                    if auto_update {
+                        if let Err(e) = crate::expect::apply_expect(&r.messages) {
+                            eprintln!("{}: {:?}", "failed".red().bold(), e);
+                            apply_expect_failed = true;
+                        }
+                    }
+                    passed += r.passed;
+                    failed += r.test_names.len() as u32 - r.passed;
+                    if test_verbose_output {
+                        for i in 0..(r.passed as usize) {
+                            println!(
+                                "test {}/{}::{} {}",
+                                r.package,
+                                r.filenames[i],
+                                r.test_names[i],
+                                "ok".bold().green()
+                            )
+                        }
+                    }
+
+                    for i in 0..(r.test_names.len() - r.passed as usize) {
+                        if r.messages[i].starts_with(super::expect::EXPECT_FAILED) {
+                            // if we failed at auto update mode, we don't show the below msg to user
+                            if !(auto_update && failed > 0 && !apply_expect_failed) {
+                                println!(
+                                    "test {}/{}::{} {}",
+                                    r.package,
+                                    r.filenames[i],
+                                    r.test_names[i],
+                                    "failed".bold().red(),
+                                );
+                                let _ = crate::expect::render_expect_fail(&r.messages[i]);
+                            }
+                        } else {
+                            println!(
+                                "test {}/{}::{} {}: {}",
+                                r.package,
+                                r.filenames[i],
+                                r.test_names[i],
+                                "failed".bold().red(),
+                                r.messages[i],
+                            );
+                        }
+                    }
+                }
+            }
+
+            _ => continue,
+        }
+    }
+
+    let test_result = TestResult { passed, failed };
+
+    if failed == 0 && !runtime_error {
+        Ok(test_result)
+    } else if apply_expect_failed {
+        Err(TestFailedStatus::ApplyExpectFailed(test_result))
+    } else if expect_failed {
+        Err(TestFailedStatus::ExpectTestFailed(test_result))
+    } else if failed != 0 {
+        Err(TestFailedStatus::Failed(test_result))
+    } else if runtime_error {
+        Err(TestFailedStatus::RuntimeError(test_result))
+    } else {
+        Err(TestFailedStatus::Others(anyhow!("unknown error")))
+    }
+}
+
+pub fn run_bundle(
+    module: &ModuleDB,
+    moonbuild_opt: &MoonbuildOpt,
+    moonc_opt: &MooncOpt,
+) -> anyhow::Result<i32> {
+    let state = crate::bundle::load_moon_proj(module, moonc_opt, moonbuild_opt)?;
+    let result = n2_run_interface(state, moonbuild_opt.target_dir.join("bundle.output"))?;
+    match result {
+        Some(0) => {}
+        _ => {
+            write_pkg_lst(module, &moonbuild_opt.target_dir)?;
+        }
+    }
+    render_result(result, moonbuild_opt.quiet, "bundle")
+}
+
+pub fn run_fmt(
+    module: &ModuleDB,
+    moonc_opt: &MooncOpt,
+    moonbuild_opt: &MoonbuildOpt,
+) -> anyhow::Result<i32> {
+    let n2_input = super::fmt::gen_fmt(module, moonc_opt, moonbuild_opt)?;
+    let state = super::fmt::gen_n2_fmt_state(&n2_input, moonc_opt, moonbuild_opt)?;
+    let _ = n2_run_interface(state, moonbuild_opt.target_dir.join("fmt.output"))?;
+    let mut exit_code = 0;
+    if moonbuild_opt.fmt_opt.as_ref().unwrap().check {
+        for item in n2_input.items.iter() {
+            let mut execution = Command::new("git")
+                .args([
+                    "--no-pager",
+                    "diff",
+                    "--color=always",
+                    "--no-index",
+                    &item.input,
+                    &item.output,
+                ])
+                .stdout(Stdio::piped())
+                .stderr(Stdio::inherit())
+                .spawn()?;
+            let child_stdout = execution.stdout.take().unwrap();
+            let mut buf = String::new();
+            let mut bufread = std::io::BufReader::new(child_stdout);
+            while let Ok(n) = bufread.read_line(&mut buf) {
+                if n > 0 {
+                    print!("{}", buf);
+                    buf.clear()
+                } else {
+                    break;
+                }
+            }
+            let status = execution.wait()?;
+            match status.code() {
+                Some(0) => {}
+                Some(1) => {
+                    exit_code = 1;
+                }
+                _ => {
+                    eprintln!(
+                        "failed to execute `git --no-pager diff --color=always --no-index {} {}`",
+                        item.input, item.output
+                    );
+                }
+            }
+        }
+    }
+    Ok(exit_code)
+}
diff --git a/crates/moonbuild/src/expect.rs b/crates/moonbuild/src/expect.rs
new file mode 100644
index 00000000..f11dfe9e
--- /dev/null
+++ b/crates/moonbuild/src/expect.rs
@@ -0,0 +1,592 @@
+use anyhow::Context;
+use colored::Colorize;
+use std::collections::BTreeSet;
+use std::collections::HashMap;
+
+#[derive(Debug, Default)]
+pub struct PackagePatch {
+    patches: HashMap<String, Vec<BufferExpect>>,
+}
+
+impl PackagePatch {
+    pub fn add(&mut self, filename: &str, patch: BufferExpect) {
+        match self.patches.get_mut(filename) {
+            Some(vec) => vec.push(patch),
+            None => {
+                self.patches.insert(filename.to_string(), vec![patch]);
+            }
+        }
+    }
+}
+
+#[derive(Debug, Default)]
+pub struct BufferExpect {
+    range: line_index::TextRange,
+    left_padding: Option<&'static str>,
+    right_padding: Option<&'static str>,
+    #[allow(unused)]
+    expect: String,
+    actual: String,
+    kind: TargetKind,
+}
+
+pub const EXPECT_FAILED: &str = "@EXPECT_FAILED ";
+
+#[derive(Debug, Default, PartialEq, Eq, PartialOrd, Ord)]
+pub enum TargetKind {
+    #[default]
+    Trivial,
+    Pipe,
+    Call,
+}
+
+#[derive(Debug, Default, PartialEq, Eq, PartialOrd, Ord)]
+pub struct Target {
+    left_border_line_start: u32,
+    left_border_col_start: u32,
+
+    line_start: u32,
+    col_start: u32,
+    line_end: u32,
+    col_end: u32,
+
+    kind: TargetKind,
+    expect: String,
+    actual: String,
+}
+
+#[derive(Debug, Default, serde::Serialize, serde::Deserialize)]
+pub struct ExpectFailedRaw {
+    loc: String,
+    args_loc: String,
+    expect: String,
+    actual: String,
+}
+
+#[derive(Debug)]
+struct Location {
+    pub raw: String,
+    pub line_start: u32,
+    pub col_start: u32,
+    pub line_end: u32,
+    pub col_end: u32,
+}
+
+impl Location {
+    pub fn ahead(&self, other: &Location) -> bool {
+        (self.line_start, self.col_start, self.line_end, self.col_end)
+            < (
+                other.line_start,
+                other.col_start,
+                other.line_end,
+                other.col_end,
+            )
+    }
+}
+
+#[derive(Debug)]
+struct Replace {
+    pub filename: String,
+
+    // inspect(1234)?
+    // ^...........^
+    pub loc: Location,
+
+    // "1234"
+    pub actual: String,
+    // inspect(1234)?
+    //         ^..^
+    pub actual_loc: Location,
+
+    pub expect: String,
+    pub expect_loc: Option<Location>,
+}
+
+impl Replace {
+    fn guess_target(&self) -> anyhow::Result<Target> {
+        // trivial case where content is provided, we can get precise location
+        if let Some(loc) = &self.expect_loc {
+            Ok(Target {
+                left_border_line_start: self.loc.line_start,
+                left_border_col_start: self.loc.col_start,
+                line_start: loc.line_start,
+                col_start: loc.col_start,
+                line_end: loc.line_end,
+                col_end: loc.col_end,
+                kind: TargetKind::Trivial,
+                expect: self.expect.clone(),
+                actual: self.actual.clone(),
+            })
+        } else {
+            let is_pipe = self.actual_loc.ahead(&self.loc);
+            if is_pipe {
+                Ok(Target {
+                    left_border_line_start: self.loc.line_start,
+                    left_border_col_start: self.loc.col_start,
+                    line_start: self.loc.line_end,
+                    col_start: self.loc.col_end - 1,
+                    line_end: self.loc.line_end,
+                    col_end: self.loc.col_end - 1,
+                    kind: TargetKind::Pipe,
+                    expect: self.expect.clone(),
+                    actual: self.actual.clone(),
+                })
+            } else {
+                // TODO: find comma
+                Ok(Target {
+                    left_border_line_start: self.actual_loc.line_end,
+                    left_border_col_start: self.actual_loc.col_end,
+
+                    line_start: self.loc.line_end,
+                    col_start: self.loc.col_end - 1,
+                    line_end: self.loc.line_end,
+                    col_end: self.loc.col_end - 1,
+                    kind: TargetKind::Call,
+                    expect: self.expect.clone(),
+                    actual: self.actual.clone(),
+                })
+            }
+        }
+    }
+}
+
+fn line_col_to_byte_idx(line_index: &line_index::LineIndex, line: u32, col: u32) -> Option<usize> {
+    let offset = line_index.offset(line_index.to_utf8(
+        line_index::WideEncoding::Utf32,
+        line_index::WideLineCol { line, col },
+    )?)?;
+    Some(usize::from(offset))
+}
+
+fn parse_expect_failed_message(msg: &str) -> anyhow::Result<Replace> {
+    let j: ExpectFailedRaw = serde_json_lenient::from_str(msg)
+        .context(format!("parse expect test result failed: {}", msg))?;
+    let locs: Vec<Option<String>> = serde_json_lenient::from_str(&j.args_loc)?;
+    if locs.len() != 4 {
+        anyhow::bail!(
+            "invalid locations {:?}, expect 4, got: {}",
+            locs,
+            locs.len()
+        );
+    }
+    if locs[0].is_none() {
+        // impossible
+        anyhow::bail!("the location of first argument cannot be None");
+    }
+    let loc = parse_loc(&j.loc)?;
+    let actual_loc = parse_loc(locs[0].as_ref().unwrap())?;
+    let expect_loc = if locs[1].is_some() {
+        Some(parse_loc(locs[1].as_ref().unwrap())?)
+    } else {
+        None
+    };
+    Ok(Replace {
+        filename: parse_filename(&j.loc)?,
+        loc,
+        expect: j.expect,
+        expect_loc,
+        actual: j.actual,
+        actual_loc,
+    })
+}
+
+fn parse_filename(loc: &str) -> anyhow::Result<String> {
+    let mut index = loc.len();
+    let mut colon = 0;
+    for (i, c) in loc.char_indices().rev() {
+        if c == ':' {
+            colon += 1;
+            if colon == 3 {
+                index = i;
+                break;
+            }
+        }
+    }
+    Ok(loc[..index].to_string())
+}
+
+fn parse_loc(loc: &str) -> anyhow::Result<Location> {
+    // find 3rd colon from right of loc
+    let mut index = loc.len();
+    let mut colon = 0;
+    for (i, c) in loc.char_indices().rev() {
+        if c == ':' {
+            colon += 1;
+            if colon == 3 {
+                index = i;
+                break;
+            }
+        }
+    }
+    let tmp = &loc[index + 1..];
+    let rloc = tmp.replace('-', ":");
+    let parts: Vec<&str> = rloc.split(':').collect();
+    if parts.len() != 4 {
+        anyhow::bail!("invalid location: {}", rloc);
+    }
+    let line_start = parts[0].parse::<u32>()? - 1;
+    let col_start = parts[1].parse::<u32>()? - 1;
+    let line_end = parts[2].parse::<u32>()? - 1;
+    let col_end = parts[3].parse::<u32>()? - 1;
+    Ok(Location {
+        raw: loc.to_string(),
+        line_start,
+        col_start,
+        line_end,
+        col_end,
+    })
+}
+
+fn collect(messages: &[String]) -> anyhow::Result<HashMap<String, BTreeSet<Target>>> {
+    let mut targets: HashMap<String, BTreeSet<Target>> = HashMap::new();
+
+    for msg in messages {
+        if !msg.starts_with(EXPECT_FAILED) {
+            continue;
+        }
+        let json_str = &msg[EXPECT_FAILED.len()..];
+        let rep = parse_expect_failed_message(json_str)?;
+
+        match targets.get_mut(&rep.filename) {
+            Some(st) => {
+                st.insert(rep.guess_target()?);
+            }
+            None => {
+                let mut newst = BTreeSet::new();
+                newst.insert(rep.guess_target()?);
+                targets.insert(rep.filename.clone(), newst);
+            }
+        }
+    }
+    Ok(targets)
+}
+
+fn gen_patch(targets: HashMap<String, BTreeSet<Target>>) -> anyhow::Result<PackagePatch> {
+    let mut pp = PackagePatch::default();
+    for (filename, targets) in targets.into_iter() {
+        let mut file_patches = vec![];
+        let content = std::fs::read_to_string(&filename)?;
+        let content_chars: Vec<char> = content.chars().collect();
+        let line_index = line_index::LineIndex::new(&content);
+
+        let charidx = content
+            .char_indices()
+            .enumerate()
+            .collect::<Vec<(usize, (usize, char))>>();
+        let mut byte_offset_to_char_offset = HashMap::new();
+        for (i, (j, _c)) in charidx.iter() {
+            byte_offset_to_char_offset.insert(*j, *i);
+        }
+
+        let lines = content.split('\n').collect::<Vec<&str>>();
+
+        for t in targets.into_iter() {
+            let offset_start =
+                line_col_to_byte_idx(&line_index, t.line_start, t.col_start).unwrap();
+            let offset_start =
+                text_size::TextSize::new(byte_offset_to_char_offset[&offset_start] as u32);
+
+            let offset_end = line_col_to_byte_idx(&line_index, t.line_end, t.col_end).unwrap();
+            let offset_end =
+                text_size::TextSize::new(byte_offset_to_char_offset[&offset_end] as u32);
+
+            let mut rg = line_index::TextRange::new(offset_start, offset_end);
+
+            let (left_padding, right_padding) = match t.kind {
+                TargetKind::Trivial => (None, None),
+                TargetKind::Pipe => {
+                    let mut find_paren = false;
+                    let mut i = usize::from(offset_start);
+                    let left_border_start = line_col_to_byte_idx(
+                        &line_index,
+                        t.left_border_line_start,
+                        t.left_border_col_start,
+                    )
+                    .unwrap();
+                    let left_border_start = byte_offset_to_char_offset[&left_border_start];
+
+                    while i >= left_border_start {
+                        let c = content_chars[i];
+                        if c == ')' {
+                            find_paren = true;
+                            break;
+                        }
+                        i -= 1;
+                    }
+                    if find_paren {
+                        (Some("content="), None)
+                    } else {
+                        let offset_start =
+                            line_col_to_byte_idx(&line_index, t.line_start, t.col_start + 1)
+                                .unwrap();
+
+                        let offset_start = text_size::TextSize::new(
+                            byte_offset_to_char_offset[&offset_start] as u32,
+                        );
+                        let offset_end =
+                            line_col_to_byte_idx(&line_index, t.line_end, t.col_end + 1).unwrap();
+
+                        let offset_end = text_size::TextSize::new(
+                            byte_offset_to_char_offset[&offset_end] as u32,
+                        );
+
+                        rg = line_index::TextRange::new(offset_start, offset_end);
+                        (Some("(content="), Some(")"))
+                    }
+                }
+                TargetKind::Call => {
+                    let mut i = usize::from(offset_start);
+                    let left_border_start = line_col_to_byte_idx(
+                        &line_index,
+                        t.left_border_line_start,
+                        t.left_border_col_start,
+                    )
+                    .unwrap();
+                    let left_border_start = byte_offset_to_char_offset[&left_border_start];
+
+                    let mut find_comma = false;
+                    while i >= left_border_start {
+                        if content_chars[i] == ',' {
+                            find_comma = true;
+                            break;
+                        }
+                        i -= 1;
+                    }
+                    if find_comma {
+                        (Some("content="), None)
+                    } else {
+                        (Some(", content="), None)
+                    }
+                }
+            };
+
+            for line in lines[t.line_start as usize..].iter() {
+                if line.trim().ends_with(")?") && !line.trim().starts_with("#|") {
+                    break;
+                }
+            }
+            file_patches.push(BufferExpect {
+                range: rg,
+                left_padding,
+                right_padding,
+                expect: t.expect,
+                actual: t.actual,
+                kind: t.kind,
+            });
+        }
+
+        pp.patches.insert(filename.to_string(), file_patches);
+    }
+    Ok(pp)
+}
+
+fn push_multi_line_string(
+    output: &mut String,
+    spaces: usize,
+    s: &str,
+    prev_char: Option<&char>,
+    next_char: Option<&char>,
+) {
+    let lines: Vec<&str> = s.split('\n').collect();
+    for (i, line) in lines.iter().enumerate() {
+        if i == 0 {
+            match prev_char {
+                Some('=') | Some('(') => {
+                    output.push('\n');
+                    output.push_str(" ".repeat(spaces).as_str());
+                }
+                Some(c) if c.is_alphabetic() => {
+                    output.push('\n');
+                    output.push_str(" ".repeat(spaces).as_str());
+                }
+                _ => {}
+            }
+            output.push_str(&format!("#|{}", line));
+        } else {
+            match prev_char {
+                Some(' ') => {
+                    output.push_str(&format!(
+                        "{}#|{}",
+                        " ".repeat(if spaces > 2 { spaces - 2 } else { 0 }),
+                        line
+                    ));
+                }
+                _ => {
+                    output.push_str(&format!("{}#|{}", " ".repeat(spaces), line));
+                }
+            }
+        }
+        if i == lines.len() - 1 {
+            if let Some(')') = next_char {
+                output.push('\n');
+                output.push_str(" ".repeat(if spaces > 2 { spaces - 2 } else { 0 }).as_str());
+            }
+        } else {
+            output.push('\n');
+        }
+    }
+}
+
+fn apply_patch(pp: &PackagePatch) -> anyhow::Result<()> {
+    for (filename, patches) in pp.patches.iter() {
+        let content = std::fs::read_to_string(filename)?;
+        // TODO: share content_chars with gen_patch
+        let content_chars = content.chars().collect::<Vec<char>>();
+
+        let charidx = content
+            .char_indices()
+            .enumerate()
+            .collect::<Vec<(usize, (usize, char))>>();
+        let mut char_offset_to_byte_offset = HashMap::new();
+        for (i, (j, _c)) in charidx.iter() {
+            char_offset_to_byte_offset.insert(*i, *j);
+        }
+
+        let lines: Vec<&str> = content.split('\n').collect();
+        let line_index = line_index::LineIndex::new(&content);
+        let mut output = String::new();
+        let mut i = 0u32;
+        let mut k = 0usize;
+        while k < patches.len() {
+            let patch = &patches[k];
+            let start = patch.range.start();
+            let end = patch.range.end();
+            #[allow(clippy::comparison_chain)]
+            if i < u32::from(start) {
+                for item in content_chars
+                    .iter()
+                    .take(usize::from(start))
+                    .skip(i as usize)
+                {
+                    output.push(*item);
+                }
+                i = u32::from(start);
+            } else if i == u32::from(start) {
+                // infer indent
+                let utf8_start = char_offset_to_byte_offset[&usize::from(start)];
+                let start_point = line_index.line_col(text_size::TextSize::new(utf8_start as u32));
+                let line = lines[start_point.line as usize];
+                let spaces = line.find(|c| c != ' ').unwrap_or(0);
+
+                if let Some(padding) = patch.left_padding {
+                    output.push_str(padding);
+                    if patch.kind == TargetKind::Call && patch.actual.contains('\n') {
+                        output.push('\n');
+                        output.push_str(" ".repeat(spaces + 2).as_str());
+                    }
+                }
+
+                if !patch.actual.contains('\n') && !patch.actual.contains('"') {
+                    output.push_str(&format!("{:?}", &patch.actual));
+                } else {
+                    let next_char = content_chars[usize::from(end)..].first();
+                    let prev_char = content_chars[..usize::from(start)].last();
+                    push_multi_line_string(
+                        &mut output,
+                        spaces + 2,
+                        &patch.actual,
+                        prev_char,
+                        next_char,
+                    );
+                }
+
+                if let Some(padding) = patch.right_padding {
+                    output.push_str(padding);
+                }
+
+                i = u32::from(end);
+                k += 1;
+            } else {
+                anyhow::bail!("unreachable state in expect test, please report this bug");
+            }
+        }
+        if i < content_chars.len() as u32 {
+            for item in content_chars.into_iter().skip(i as usize) {
+                output.push(item);
+            }
+        }
+        std::fs::write(filename, output)?;
+    }
+
+    Ok(())
+}
+
+pub fn apply_expect(messages: &[String]) -> anyhow::Result<()> {
+    // dbg!(&messages);
+    let targets = collect(messages)?;
+    // dbg!(&targets);
+    let patches = gen_patch(targets)?;
+    // dbg!(&patches);
+    apply_patch(&patches)?;
+    Ok(())
+}
+
+fn format_chunks(chunks: Vec<dissimilar::Chunk>) -> String {
+    let mut buf = String::new();
+    for chunk in chunks {
+        let formatted = match chunk {
+            dissimilar::Chunk::Equal(text) => text.into(),
+            dissimilar::Chunk::Delete(text) => format!("{}", text.red().underline()),
+            dissimilar::Chunk::Insert(text) => format!("{}", text.green().underline()),
+        };
+        buf.push_str(&formatted);
+    }
+    buf
+}
+
+pub fn render_expect_fail(msg: &str) -> anyhow::Result<()> {
+    assert!(msg.starts_with(EXPECT_FAILED));
+    let json_str = &msg[EXPECT_FAILED.len()..];
+    let rep = parse_expect_failed_message(json_str)?;
+
+    let d = dissimilar::diff(&rep.expect, &rep.actual);
+    println!(
+        r#"expect test failed at {}
+{}
+----
+{}
+----
+"#,
+        rep.loc.raw,
+        "Diff:".bold(),
+        format_chunks(d)
+    );
+    Ok(())
+}
+
+pub fn render_expect_fails(messages: &[String]) -> anyhow::Result<()> {
+    for msg in messages {
+        if !msg.starts_with(EXPECT_FAILED) {
+            continue;
+        }
+        render_expect_fail(msg)?;
+    }
+    Ok(())
+}
+
+#[test]
+fn test_split() {
+    let input = "\n";
+    let xs: Vec<&str> = input.split('\n').collect();
+    assert_eq!(xs, ["", ""]);
+
+    let input = "\n\n";
+    let xs: Vec<&str> = input.split('\n').collect();
+    assert_eq!(xs, ["", "", ""]);
+}
+
+#[test]
+fn test_x() {
+    let input = r#"fn actual() -> String {
+  "BinOp('+', BinOp('+', Num(1), Num(2)), Num(3))"
+}
+
+test {
+  inspect(actual(), content="BinOp('+', Num(1), Num(2))")?
+}
+"#;
+    let chars = input.char_indices().collect::<Vec<(usize, char)>>();
+    for (i, c) in chars {
+        println!("{}: {}", i, c);
+    }
+}
diff --git a/crates/moonbuild/src/fmt.rs b/crates/moonbuild/src/fmt.rs
new file mode 100644
index 00000000..d4e672d6
--- /dev/null
+++ b/crates/moonbuild/src/fmt.rs
@@ -0,0 +1,279 @@
+use std::path::{Path, PathBuf};
+use std::process::Command;
+
+use anyhow::Context;
+use moonutil::common::IGNORE_DIRS;
+use moonutil::module::ModuleDB;
+use walkdir::WalkDir;
+
+use moonutil::common::{MoonbuildOpt, MooncOpt};
+
+use n2::graph::{self as n2graph, Build, BuildIns, BuildOuts, FileId, FileLoc};
+use n2::load::State;
+use n2::smallmap::SmallMap;
+use std::rc::Rc;
+
+use crate::gen::cmd_builder::CommandBuilder;
+
+pub fn format_package(dir: &Path) -> anyhow::Result<i32> {
+    let mut errors = vec![];
+    let result = walk_dir(dir, &mut errors);
+    if result.is_ok() {
+        if errors.is_empty() {
+            return Ok(0);
+        } else {
+            for (p, e) in errors {
+                eprintln!("Error while formatting {}:\n{}", p.display(), e);
+            }
+            return Ok(1);
+        }
+    }
+    anyhow::bail!(result.err().unwrap())
+}
+
+fn walk_dir(dir: &Path, errors: &mut Vec<(PathBuf, String)>) -> anyhow::Result<()> {
+    let walker = WalkDir::new(dir).into_iter();
+    for entry in walker.filter_entry(|e| !IGNORE_DIRS.contains(&e.file_name().to_str().unwrap())) {
+        let entry = entry.context("failed to read entry")?;
+        if entry.file_type().is_dir() {
+            continue;
+        }
+
+        let p = entry.path();
+
+        if let Some(ext) = p.extension() {
+            if ext == "mbt" {
+                let out = Command::new("moonfmt").arg("-w").arg(p).output()?;
+                if !out.status.success() {
+                    let stderr = String::from_utf8_lossy(&out.stderr).to_string();
+                    errors.push((p.to_path_buf(), stderr));
+                }
+            }
+        }
+    }
+    Ok(())
+}
+
+pub fn load_moon_proj(
+    m: &ModuleDB,
+    moonc_opt: &MooncOpt,
+    moonbuild_opt: &MoonbuildOpt,
+) -> anyhow::Result<State> {
+    let n2_input = gen_fmt(m, moonc_opt, moonbuild_opt);
+    let state = gen_n2_fmt_state(&n2_input?, moonc_opt, moonbuild_opt)?;
+    Ok(state)
+}
+
+#[derive(Debug)]
+pub struct FmtItem {
+    pub input: String,
+    pub output: String,
+    pub phony_out: String,
+}
+
+#[derive(Debug)]
+pub struct N2FmtInput {
+    pub items: Vec<FmtItem>,
+}
+
+pub fn gen_fmt(
+    m: &ModuleDB,
+    _moonc_opt: &MooncOpt,
+    moonbuild_opt: &MoonbuildOpt,
+) -> anyhow::Result<N2FmtInput> {
+    let mut items = vec![];
+    for (_, pkg) in m.packages.iter() {
+        if pkg.is_third_party {
+            continue;
+        }
+        for f in pkg
+            .files
+            .iter()
+            .chain(pkg.wbtest_files.iter())
+            .chain(pkg.test_files.iter())
+        {
+            let item = FmtItem {
+                input: f.display().to_string(),
+                output: moonbuild_opt
+                    .target_dir
+                    .join(PathBuf::from_iter(pkg.rel.components.iter()))
+                    .join(f.file_name().unwrap().to_str().unwrap())
+                    .display()
+                    .to_string(),
+                phony_out: moonbuild_opt
+                    .target_dir
+                    .join(PathBuf::from_iter(pkg.rel.components.iter()))
+                    .join(f.file_name().unwrap().to_str().unwrap())
+                    .with_extension("phony")
+                    .display()
+                    .to_string(),
+            };
+            items.push(item);
+        }
+    }
+    Ok(N2FmtInput { items })
+}
+
+fn gen_inplace_fmt_command(graph: &mut n2graph::Graph, item: &FmtItem) -> (Build, FileId) {
+    let loc = FileLoc {
+        filename: Rc::new(PathBuf::from("format")),
+        line: 0,
+    };
+
+    let input_ids = vec![graph.files.id_from_canonical(item.input.clone())];
+
+    let output_id = graph.files.id_from_canonical(item.phony_out.clone());
+    let output_ids = vec![output_id];
+
+    let ins = BuildIns {
+        ids: input_ids,
+        explicit: 1,
+        implicit: 0,
+        order_only: 0,
+    };
+
+    let outs = BuildOuts {
+        ids: output_ids,
+        explicit: 1,
+    };
+
+    let mut build = Build::new(loc, ins, outs);
+
+    let command = CommandBuilder::new("moonfmt")
+        .arg(&item.input)
+        .arg("-w")
+        .build();
+    build.cmdline = Some(command);
+    (build, output_id)
+}
+
+fn gen_fmt_to_command(graph: &mut n2graph::Graph, item: &FmtItem) -> (Build, FileId) {
+    let loc = FileLoc {
+        filename: Rc::new(PathBuf::from("format")),
+        line: 0,
+    };
+
+    let input_ids = vec![graph.files.id_from_canonical(item.input.clone())];
+
+    let output_id = graph.files.id_from_canonical(item.output.clone());
+    let output_ids = vec![output_id];
+
+    let ins = BuildIns {
+        ids: input_ids,
+        explicit: 1,
+        implicit: 0,
+        order_only: 0,
+    };
+
+    let outs = BuildOuts {
+        ids: output_ids,
+        explicit: 1,
+    };
+
+    let mut build = Build::new(loc, ins, outs);
+
+    let command = CommandBuilder::new("moonfmt")
+        .arg(&item.input)
+        .arg("-o")
+        .arg(&item.output)
+        .build();
+    build.cmdline = Some(command);
+    (build, output_id)
+}
+
+pub fn gen_inplace_format_action(graph: &mut n2graph::Graph, ids: &[FileId]) -> (Build, FileId) {
+    let loc = FileLoc {
+        filename: Rc::new(PathBuf::from("format")),
+        line: 0,
+    };
+
+    let phony_out = graph
+        .files
+        .id_from_canonical("__inplace_format".to_string());
+
+    let ins = BuildIns {
+        ids: ids.into(),
+        explicit: ids.len(),
+        implicit: 0,
+        order_only: 0,
+    };
+
+    let outs = BuildOuts {
+        ids: vec![phony_out],
+        explicit: 1,
+    };
+
+    (Build::new(loc, ins, outs), phony_out)
+}
+
+pub fn gen_format_to_action(graph: &mut n2graph::Graph, ids: &[FileId]) -> (Build, FileId) {
+    let loc = FileLoc {
+        filename: Rc::new(PathBuf::from("format")),
+        line: 0,
+    };
+
+    let phony_out = graph.files.id_from_canonical("__format_to".to_string());
+
+    let ins = BuildIns {
+        ids: ids.into(),
+        explicit: ids.len(),
+        implicit: 0,
+        order_only: 0,
+    };
+
+    let outs = BuildOuts {
+        ids: vec![phony_out],
+        explicit: 1,
+    };
+
+    (Build::new(loc, ins, outs), phony_out)
+}
+
+pub fn gen_n2_fmt_state(
+    input: &N2FmtInput,
+    _moonc_opt: &MooncOpt,
+    moonbuild_opt: &MoonbuildOpt,
+) -> anyhow::Result<State> {
+    let mut graph = n2graph::Graph::default();
+    let mut default = vec![];
+    let mut builds = vec![];
+
+    for item in input.items.iter() {
+        let (build, fid) = gen_inplace_fmt_command(&mut graph, item);
+        graph.add_build(build)?;
+        builds.push(fid);
+    }
+    let (all_inplace_format_build, inplace_format_action) =
+        gen_inplace_format_action(&mut graph, &builds);
+
+    graph.add_build(all_inplace_format_build)?;
+    default.push(inplace_format_action);
+
+    if moonbuild_opt.fmt_opt.as_ref().unwrap().check {
+        default.clear();
+        builds.clear();
+        for item in input.items.iter() {
+            let (build, fid) = gen_fmt_to_command(&mut graph, item);
+            graph.add_build(build)?;
+            builds.push(fid);
+        }
+        let (all_format_to_build, format_to_action) = gen_format_to_action(&mut graph, &builds);
+        graph.add_build(all_format_to_build)?;
+        default.push(format_to_action);
+    }
+
+    let mut hashes = n2graph::Hashes::default();
+    let db = n2::db::open(
+        &moonbuild_opt.target_dir.join("format.db"),
+        &mut graph,
+        &mut hashes,
+    )?;
+
+    Ok(State {
+        graph,
+        db,
+        hashes,
+        default,
+        pools: SmallMap::default(),
+    })
+}
diff --git a/crates/moonbuild/src/gen/cmd_builder.rs b/crates/moonbuild/src/gen/cmd_builder.rs
new file mode 100644
index 00000000..66a9ce10
--- /dev/null
+++ b/crates/moonbuild/src/gen/cmd_builder.rs
@@ -0,0 +1,93 @@
+pub struct CommandBuilder {
+    command: String,
+    args: Vec<String>,
+}
+
+impl CommandBuilder {
+    pub fn new(command: &str) -> CommandBuilder {
+        CommandBuilder {
+            command: command.into(),
+            args: Vec::new(),
+        }
+    }
+
+    pub fn arg_with_cond(&mut self, cond: bool, arg: &str) -> &mut CommandBuilder {
+        if cond {
+            self.args.push(arg.into());
+        }
+        self
+    }
+
+    pub fn lazy_args_with_cond(
+        &mut self,
+        cond: bool,
+        args: impl FnOnce() -> Vec<String>,
+    ) -> &mut CommandBuilder {
+        if cond {
+            for arg in args().into_iter() {
+                self.args.push(arg);
+            }
+        }
+        self
+    }
+
+    pub fn args_with_cond<I, S>(&mut self, cond: bool, args: I) -> &mut CommandBuilder
+    where
+        I: IntoIterator<Item = S>,
+        S: Into<String>,
+    {
+        if cond {
+            for arg in args {
+                self.args.push(arg.into());
+            }
+        }
+        self
+    }
+
+    pub fn arg(&mut self, arg: &str) -> &mut CommandBuilder {
+        self.args.push(arg.into());
+        self
+    }
+
+    pub fn args<I, S>(&mut self, args: I) -> &mut CommandBuilder
+    where
+        I: IntoIterator<Item = S>,
+        S: Into<String>,
+    {
+        for arg in args {
+            self.args.push(arg.into());
+        }
+        self
+    }
+
+    pub fn args_with_prefix_separator<I, S>(
+        &mut self,
+        args: I,
+        separator: &str,
+    ) -> &mut CommandBuilder
+    where
+        I: IntoIterator<Item = S>,
+        S: Into<String>,
+    {
+        for arg in args {
+            self.args.push(separator.into());
+            self.args.push(arg.into());
+        }
+        self
+    }
+
+    pub fn build(&self) -> String {
+        let mut cmd = self.command.clone();
+        for arg in self.args.iter() {
+            cmd.push(' ');
+            if arg.contains(' ') {
+                cmd.push('"');
+                cmd.push_str(arg);
+                cmd.push('"');
+            } else {
+                cmd.push_str(arg);
+            }
+        }
+        cmd
+    }
+}
diff --git a/crates/moonbuild/src/gen/gen_build.rs b/crates/moonbuild/src/gen/gen_build.rs
new file mode 100644
index 00000000..acf9e9fb
--- /dev/null
+++ b/crates/moonbuild/src/gen/gen_build.rs
@@ -0,0 +1,487 @@
+use anyhow::{bail, Ok};
+use moonutil::common::TargetBackend::*;
+use moonutil::module::ModuleDB;
+use moonutil::package::{JsFormat, Package};
+
+use super::cmd_builder::CommandBuilder;
+use crate::gen::MiAlias;
+use std::path::{Path, PathBuf};
+use std::rc::Rc;
+
+use moonutil::common::{MoonbuildOpt, MooncOpt, TargetBackend, MOONBITLANG_CORE, MOON_PKG_JSON};
+use n2::graph::{self as n2graph, Build, BuildIns, BuildOuts, FileLoc};
+use n2::load::State;
+use n2::smallmap::SmallMap;
+
+#[derive(Debug)]
+pub struct BuildDepItem {
+    pub core_out: String,
+    pub mi_out: String,
+    pub mbt_deps: Vec<String>,
+    pub mi_deps: Vec<MiAlias>, // do not need add parent's mi files
+    pub package_full_name: String,
+    pub package_source_dir: String,
+    pub is_main: bool,
+    pub is_third_party: bool,
+}
+
+#[derive(Debug)]
+pub struct LinkDepItem {
+    pub out: String,
+    pub core_deps: Vec<String>, // need add parent's core files recursively
+    pub package_full_name: String,
+    pub package_sources: Vec<(String, String)>, // (pkgname, source_dir)
+
+    pub link: Option<moonutil::package::Link>,
+}
+
+#[derive(Debug)]
+pub struct N2BuildInput {
+    pub build_items: Vec<BuildDepItem>,
+    pub link_items: Vec<LinkDepItem>, // entry points
+}
+
+pub fn gen_build_build_item(
+    m: &ModuleDB,
+    pkg: &Package,
+    moonc_opt: &MooncOpt,
+) -> anyhow::Result<BuildDepItem> {
+    let core_out = pkg.artifact.with_extension("core");
+    let mi_out = pkg.artifact.with_extension("mi");
+
+    let backend_filtered =
+        moonutil::common::backend_filter(&pkg.files, moonc_opt.link_opt.target_backend);
+
+    let mbt_deps = backend_filtered
+        .iter()
+        .filter(|f| {
+            !f.file_name()
+                .unwrap()
+                .to_str()
+                .unwrap()
+                .ends_with("_test.mbt")
+        })
+        .map(|f| f.display().to_string())
+        .collect::<Vec<_>>();
+
+    let mut mi_deps = vec![];
+
+    for dep in pkg.imports.iter() {
+        let full_import_name = dep.path.make_full_path();
+        if !m.packages.contains_key(&full_import_name) {
+            bail!(
+                "{}: the imported package `{}` could not be located.",
+                m.source_dir
+                    .join(pkg.rel.fs_full_name())
+                    .join(MOON_PKG_JSON)
+                    .display(),
+                full_import_name,
+            );
+        }
+        let cur_pkg = &m.packages[&full_import_name];
+        let d = cur_pkg.artifact.with_extension("mi");
+        let alias = dep.alias.clone().unwrap_or(cur_pkg.last_name().into());
+        mi_deps.push(MiAlias {
+            name: d.display().to_string(),
+            alias,
+        });
+    }
+
+    let package_full_name = pkg.full_name();
+    let package_source_dir: String = pkg.root_path.to_string_lossy().into_owned();
+
+    Ok(BuildDepItem {
+        core_out: core_out.display().to_string(),
+        mi_out: mi_out.display().to_string(),
+        mbt_deps,
+        mi_deps,
+        package_full_name,
+        package_source_dir,
+        is_main: pkg.is_main,
+        is_third_party: pkg.is_third_party,
+    })
+}
+
+pub fn gen_build_link_item(
+    m: &ModuleDB,
+    pkg: &Package,
+    _moonc_opt: &MooncOpt,
+) -> anyhow::Result<LinkDepItem> {
+    let out = pkg.artifact.with_extension("wat"); // TODO: extension is determined by build option
+    let package_full_name = pkg.full_name();
+
+    let tp = super::util::topo_from_node(m, pkg)?;
+    let core_deps = super::util::nodes_to_cores(m, &tp);
+    let package_sources = super::util::nodes_to_pkg_sources(m, &tp);
+
+    Ok(LinkDepItem {
+        out: out.display().to_string(),
+        core_deps,
+        package_sources,
+        package_full_name,
+        link: pkg.link.clone(),
+    })
+}
+
+pub fn gen_build(
+    m: &ModuleDB,
+    moonc_opt: &MooncOpt,
+    _moonbuild_opt: &MoonbuildOpt,
+) -> anyhow::Result<N2BuildInput> {
+    let mut build_items = vec![];
+    let mut link_items = vec![];
+    for (i, (_, pkg)) in m.packages.iter().enumerate() {
+        let is_main = m.entries.contains(&i);
+
+        if is_main {
+            // entry also need build
+            build_items.push(gen_build_build_item(m, pkg, moonc_opt)?);
+            // link need add *.core files recursively
+            link_items.push(gen_build_link_item(m, pkg, moonc_opt)?);
+            continue;
+        }
+
+        if pkg.need_link {
+            build_items.push(gen_build_build_item(m, pkg, moonc_opt)?);
+            link_items.push(gen_build_link_item(m, pkg, moonc_opt)?);
+            continue;
+        }
+
+        {
+            build_items.push(gen_build_build_item(m, pkg, moonc_opt)?);
+        }
+    }
+    Ok(N2BuildInput {
+        build_items,
+        link_items,
+    })
+}
+
+pub fn gen_build_command(
+    graph: &mut n2graph::Graph,
+    item: &BuildDepItem,
+    moonc_opt: &MooncOpt,
+) -> Build {
+    let core_output_id = graph.files.id_from_canonical(item.core_out.clone());
+    let mi_output_id = graph.files.id_from_canonical(item.mi_out.clone());
+
+    let loc = FileLoc {
+        filename: Rc::new(PathBuf::from("build")),
+        line: 0,
+    };
+
+    let mut inputs = item.mbt_deps.clone();
+    inputs.extend(item.mi_deps.iter().map(|a| a.name.clone()));
+    let input_ids = inputs
+        .into_iter()
+        .map(|f| graph.files.id_from_canonical(f))
+        .collect::<Vec<_>>();
+
+    let mi_files_with_alias: Vec<String> = item
+        .mi_deps
+        .iter()
+        .map(|a| format!("{}:{}", a.name, a.alias))
+        .collect();
+
+    let len = input_ids.len();
+
+    let ins = BuildIns {
+        ids: input_ids,
+        explicit: len,
+        implicit: 0,
+        order_only: 0,
+    };
+
+    let outs = BuildOuts {
+        ids: vec![core_output_id, mi_output_id],
+        explicit: 1,
+    };
+
+    // WORKAROUND: do not test coverage on coverage library itself, because of cyclic dependency
+    let enable_coverage = moonc_opt.build_opt.enable_coverage
+        && !super::is_skip_coverage_lib(&item.package_full_name)
+        && !item.is_third_party;
+    // WORKAROUND: lang core/builtin and core/coverage should be able to cover themselves
+    let self_coverage = enable_coverage && super::is_self_coverage_lib(&item.package_full_name);
+
+    let mut build = Build::new(loc, ins, outs);
+
+    let cur_pkg_warn_list = match moonc_opt.build_opt.warn_lists.get(&item.package_full_name) {
+        Some(Some(warn_list)) => warn_list,
+        _ => "",
+    };
+    let cur_pkg_alert_list = match moonc_opt.build_opt.alert_lists.get(&item.package_full_name) {
+        Some(Some(alert_list)) => alert_list,
+        _ => "",
+    };
+
+    let command = CommandBuilder::new("moonc")
+        .arg("build-package")
+        .args_with_cond(moonc_opt.render, vec!["-error-format", "json"])
+        .args_with_cond(
+            moonc_opt.build_opt.deny_warn,
+            // the default strategy for warn and alert is +a and +all-raise-throw-unsafe+deprecated
+            // we replace + with @ to tell moonc treat warning as error
+            ["-w", "@a", "-alert", "@all-raise-throw-unsafe+deprecated"],
+        )
+        .args(&item.mbt_deps)
+        .args_with_cond(!cur_pkg_warn_list.is_empty(), ["-w", cur_pkg_warn_list])
+        .args_with_cond(
+            !cur_pkg_alert_list.is_empty(),
+            ["-alert", cur_pkg_alert_list],
+        )
+        .arg("-o")
+        .arg(&item.core_out)
+        .arg("-pkg")
+        .arg(&item.package_full_name)
+        .arg_with_cond(item.is_main, "-is-main")
+        .args_with_cond(
+            !moonc_opt.nostd,
+            [
+                "-std-path",
+                moonutil::moon_dir::core_bundle(moonc_opt.link_opt.target_backend)
+                    .to_str()
+                    .unwrap(),
+            ],
+        )
+        .args_with_prefix_separator(mi_files_with_alias, "-i")
+        .arg("-pkg-sources")
+        .arg(&format!(
+            "{}:{}",
+            &item.package_full_name, &item.package_source_dir
+        ))
+        .args(["-target", moonc_opt.build_opt.target_backend.to_flag()])
+        .arg_with_cond(moonc_opt.build_opt.debug_flag, "-g")
+        .arg_with_cond(moonc_opt.link_opt.source_map, "-source-map")
+        .arg_with_cond(enable_coverage, "-enable-coverage")
+        .arg_with_cond(self_coverage, "-coverage-package-override=@self")
+        .args(moonc_opt.extra_build_opt.iter())
+        .build();
+    log::debug!("Command: {}", command);
+    build.cmdline = Some(command);
+    build
+}
+
+pub fn gen_link_command(
+    graph: &mut n2graph::Graph,
+    item: &LinkDepItem,
+    moonc_opt: &MooncOpt,
+) -> (Build, n2graph::FileId) {
+    let artifact_output_path = PathBuf::from(&item.out)
+        .with_extension(moonc_opt.link_opt.output_format.to_str())
+        .display()
+        .to_string();
+
+    let artifact_id = graph.files.id_from_canonical(artifact_output_path.clone());
+
+    let loc = FileLoc {
+        filename: Rc::new(PathBuf::from("build")),
+        line: 0,
+    };
+
+    let input_ids = item
+        .core_deps
+        .iter()
+        .map(|f| graph.files.id_from_canonical(f.clone()))
+        .collect::<Vec<_>>();
+    let len = input_ids.len();
+
+    let ins = BuildIns {
+        ids: input_ids,
+        explicit: len,
+        implicit: 0,
+        order_only: 0,
+    };
+
+    let outs = BuildOuts {
+        ids: vec![artifact_id],
+        explicit: 1,
+    };
+
+    let mut build = Build::new(loc, ins, outs);
+
+    let exports = item.exports(moonc_opt.link_opt.target_backend);
+    let export_memory_name = item.export_memory_name(moonc_opt.link_opt.target_backend);
+    let heap_start_address = item.heap_start_address(moonc_opt.link_opt.target_backend);
+    let import_memory = item.import_memory(moonc_opt.link_opt.target_backend);
+    let link_flags = item.link_flags(moonc_opt.link_opt.target_backend);
+
+    let command = CommandBuilder::new("moonc")
+        .arg("link-core")
+        .arg_with_cond(
+            !moonc_opt.nostd,
+            moonutil::moon_dir::core_core(moonc_opt.link_opt.target_backend)
+                .to_str()
+                .unwrap(),
+        )
+        .args(&item.core_deps)
+        .arg("-main")
+        .arg(&item.package_full_name)
+        .arg("-o")
+        .arg(&artifact_output_path)
+        .args_with_prefix_separator(
+            item.package_sources
+                .iter()
+                .map(|(pkg, src)| format!("{}:{}", pkg, src)),
+            "-pkg-sources",
+        )
+        .args_with_cond(
+            !moonc_opt.nostd,
+            [
+                "-pkg-sources",
+                &format!(
+                    "{}:{}",
+                    MOONBITLANG_CORE,
+                    &moonutil::moon_dir::core().display()
+                ),
+            ],
+        )
+        .args(["-target", moonc_opt.link_opt.target_backend.to_flag()])
+        .arg_with_cond(moonc_opt.link_opt.debug_flag, "-g")
+        .arg_with_cond(moonc_opt.link_opt.source_map, "-source-map")
+        .lazy_args_with_cond(exports.is_some(), || {
+            let es = exports.unwrap();
+            if es.is_empty() {
+                vec!["".to_string()]
+            } else {
+                vec![format!(
+                    "-exported_functions={}",
+                    exports.unwrap().join(",")
+                )]
+            }
+        })
+        .lazy_args_with_cond(export_memory_name.is_some(), || {
+            vec![
+                "-export-memory-name".to_string(),
+                export_memory_name.unwrap().to_string(),
+            ]
+        })
+        .lazy_args_with_cond(import_memory.is_some(), || {
+            let im = import_memory.unwrap();
+            vec![
+                "-import-memory-module".to_string(),
+                im.module.clone(),
+                "-import-memory-name".to_string(),
+                im.name.clone(),
+            ]
+        })
+        .lazy_args_with_cond(heap_start_address.is_some(), || {
+            vec![
+                "-heap-start-address".to_string(),
+                heap_start_address.unwrap().to_string(),
+            ]
+        })
+        .lazy_args_with_cond(link_flags.is_some(), || link_flags.unwrap())
+        .lazy_args_with_cond(
+            moonc_opt.link_opt.target_backend == moonutil::common::TargetBackend::Js
+                && item.link.is_some()
+                && item.link.as_ref().unwrap().js.is_some(),
+            || {
+                let js = item.link.as_ref().unwrap().js.as_ref().unwrap();
+                if js.format.is_some() {
+                    vec![
+                        "-js-format".to_string(),
+                        js.format.unwrap().to_flag().to_string(),
+                    ]
+                } else {
+                    vec![
+                        "-js-format".to_string(),
+                        JsFormat::default().to_flag().to_string(),
+                    ]
+                }
+            },
+        )
+        .args(moonc_opt.extra_link_opt.iter())
+        .build();
+    log::debug!("Command: {}", command);
+    build.cmdline = Some(command);
+    (build, artifact_id)
+}
+
+pub fn gen_n2_build_state(
+    input: &N2BuildInput,
+    target_dir: &Path,
+    moonc_opt: &MooncOpt,
+    moonbuild_opt: &MoonbuildOpt,
+) -> anyhow::Result<State> {
+    let _ = moonbuild_opt;
+    let mut graph = n2graph::Graph::default();
+    let mut default = vec![];
+
+    for item in input.build_items.iter() {
+        let build = gen_build_command(&mut graph, item, moonc_opt);
+        graph.add_build(build)?;
+    }
+    for item in input.link_items.iter() {
+        let (build, fid) = gen_link_command(&mut graph, item, moonc_opt);
+        default.push(fid);
+        graph.add_build(build)?;
+    }
+
+    let mut hashes = n2graph::Hashes::default();
+    let db = n2::db::open(&target_dir.join("build.moon_db"), &mut graph, &mut hashes)?;
+
+    Ok(State {
+        graph,
+        db,
+        hashes,
+        default,
+        pools: SmallMap::default(),
+    })
+}
+
+#[rustfmt::skip]
+impl LinkDepItem {
+    pub fn wasm_exports(&self) -> Option<&Vec<String>> { self.link.as_ref()?.wasm.as_ref()?.exports.as_ref() }
+    pub fn wasm_export_memory_name(&self) -> Option<&String> { self.link.as_ref()?.wasm.as_ref()?.export_memory_name.as_ref() }
+    pub fn wasm_import_memory(&self) -> Option<&moonutil::package::ImportMemory> { self.link.as_ref()?.wasm.as_ref()?.import_memory.as_ref() }
+    pub fn wasm_heap_start_address(&self) -> Option<&u32> { self.link.as_ref()?.wasm.as_ref()?.heap_start_address.as_ref() }
+    pub fn wasm_link_flags(&self) -> Option<&Vec<String>> { self.link.as_ref()?.wasm.as_ref()?.flags.as_ref() }
+
+    pub fn wasm_gc_exports(&self) -> Option<&Vec<String>> { self.link.as_ref()?.wasm_gc.as_ref()?.exports.as_ref() }
+    pub fn wasm_gc_export_memory_name(&self) -> Option<&String> { self.link.as_ref()?.wasm_gc.as_ref()?.export_memory_name.as_ref() }
+    pub fn wasm_gc_import_memory(&self) -> Option<&moonutil::package::ImportMemory> { self.link.as_ref()?.wasm_gc.as_ref()?.import_memory.as_ref() }
+    pub fn wasm_gc_link_flags(&self) -> Option<&Vec<String>> { self.link.as_ref()?.wasm_gc.as_ref()?.flags.as_ref() }
+
+    pub fn js_exports(&self) -> Option<&Vec<String>> { self.link.as_ref()?.js.as_ref()?.exports.as_ref() }
+
+    pub fn exports(&self, b: TargetBackend) -> Option<&Vec<String>> {
+        match b {
+            Wasm => self.wasm_exports(),
+            WasmGC => self.wasm_gc_exports(),
+            Js => self.js_exports(),
+        }
+    }
+
+    pub fn export_memory_name(&self, b: TargetBackend) -> Option<&String> {
+        match b {
+            Wasm => self.wasm_export_memory_name(),
+            WasmGC => self.wasm_gc_export_memory_name(),
+            Js => None,
+        }
+    }
+
+    pub fn heap_start_address(&self, b: TargetBackend) -> Option<&u32> {
+        match b {
+            Wasm => self.wasm_heap_start_address(),
+            WasmGC => None,
+            Js => None,
+        }
+    }
+
+    pub fn import_memory(&self, b: TargetBackend) -> Option<&moonutil::package::ImportMemory> {
+        match b {
+            Wasm => self.wasm_import_memory(),
+            WasmGC => self.wasm_gc_import_memory(),
+            Js => None,
+        }
+    }
+
+    pub fn link_flags(&self, b: TargetBackend) -> Option<Vec<String>> {
+        match b {
+            Wasm => self.wasm_link_flags().cloned(),
+            WasmGC => self.wasm_gc_link_flags().cloned(),
+            Js => None,
+        }
+    }
+}
diff --git a/crates/moonbuild/src/gen/gen_bundle.rs b/crates/moonbuild/src/gen/gen_bundle.rs
new file mode 100644
index 00000000..cb8e4621
--- /dev/null
+++ b/crates/moonbuild/src/gen/gen_bundle.rs
@@ -0,0 +1,300 @@
+use anyhow::bail;
+use indexmap::IndexMap;
+use moonutil::module::ModuleDB;
+use moonutil::package::Package;
+use n2::graph::{self as n2graph, Build, BuildIns, BuildOuts, FileLoc};
+use n2::load::State;
+use n2::smallmap::SmallMap;
+use std::path::{Path, PathBuf};
+use std::rc::Rc;
+
+use moonutil::common::{MoonbuildOpt, MooncOpt, MOON_PKG_JSON};
+
+use super::cmd_builder::CommandBuilder;
+use crate::gen::MiAlias;
+
+#[derive(Debug)]
+pub struct BundleDepItem {
+    pub mi_out: String,
+    pub core_out: String,
+    pub mbt_deps: Vec<String>,
+    pub mi_deps: Vec<MiAlias>,
+    pub package_full_name: String,
+    pub package_source_dir: String,
+    pub is_main: bool,
+}
+
+#[derive(Debug)]
+pub struct N2BundleAll {
+    pub order: Vec<String>,
+    pub name: String,
+}
+
+#[derive(Debug)]
+pub struct N2BundleInput {
+    pub bundle_items: Vec<BundleDepItem>,
+    pub bundle_order: N2BundleAll,
+}
+
+pub fn gen_bundle(
+    m: &ModuleDB,
+    moonc_opt: &MooncOpt,
+    _moonbuild_opt: &MoonbuildOpt,
+) -> anyhow::Result<N2BundleInput> {
+    let mut dep_items = vec![];
+    for (_, pkg) in m.packages.iter() {
+        let item = pkg_to_bundle_item(&m.source_dir, &m.packages, pkg, moonc_opt)?;
+        dep_items.push(item);
+    }
+
+    let nodes = super::util::toposort(m)?;
+    let mut order = vec![];
+    for node in nodes.iter() {
+        let p = &m.packages[node];
+        order.push(
+            p.artifact
+                .with_extension("core")
+                .to_str()
+                .unwrap()
+                .to_string(),
+        );
+    }
+
+    Ok(N2BundleInput {
+        bundle_items: dep_items,
+        bundle_order: N2BundleAll {
+            order,
+            name: m.name.split('/').last().unwrap_or("bundle").to_string(),
+        },
+    })
+}
+
+pub fn pkg_to_bundle_item(
+    source_dir: &Path,
+    packages: &IndexMap<String, Package>,
+    pkg: &Package,
+    moonc_opt: &MooncOpt,
+) -> anyhow::Result<BundleDepItem> {
+    let core_out = pkg.artifact.with_extension("core");
+    let mi_out = pkg.artifact.with_extension("mi");
+
+    let backend_filtered =
+        moonutil::common::backend_filter(&pkg.files, moonc_opt.link_opt.target_backend);
+    let mbt_deps = backend_filtered
+        .iter()
+        .filter(|f| {
+            !f.file_name()
+                .unwrap()
+                .to_str()
+                .unwrap()
+                .ends_with("_test.mbt")
+        })
+        .map(|f| f.display().to_string())
+        .collect::<Vec<_>>();
+
+    let mut mi_deps = vec![];
+
+    for dep in pkg.imports.iter() {
+        let full_import_name = dep.path.make_full_path();
+        if !packages.contains_key(&full_import_name) {
+            bail!(
+                "{}: the imported package `{}` could not be located.",
+                source_dir
+                    .join(pkg.rel.fs_full_name())
+                    .join(MOON_PKG_JSON)
+                    .display(),
+                full_import_name,
+            );
+        }
+        let cur_pkg = &packages[&full_import_name];
+        let d = cur_pkg.artifact.with_extension("mi");
+        let alias = dep.alias.clone().unwrap_or(cur_pkg.last_name().into());
+        mi_deps.push(MiAlias {
+            name: d.display().to_string(),
+            alias,
+        });
+    }
+
+    let package_full_name = pkg.full_name();
+    let package_source_dir: String = if pkg.rel.components.is_empty() {
+        source_dir.display().to_string()
+    } else {
+        source_dir
+            .join(pkg.rel.fs_full_name())
+            .to_str()
+            .unwrap()
+            .into()
+    };
+    Ok(BundleDepItem {
+        mi_out: mi_out.display().to_string(),
+        core_out: core_out.display().to_string(),
+        mbt_deps,
+        mi_deps,
+        package_full_name,
+        package_source_dir,
+        is_main: pkg.is_main,
+    })
+}
+
+pub fn gen_build_command(
+    graph: &mut n2graph::Graph,
+    item: &BundleDepItem,
+    moonc_opt: &MooncOpt,
+    moonbuild_opt: &MoonbuildOpt,
+) -> Build {
+    let _ = moonbuild_opt;
+    let core_output_id = graph.files.id_from_canonical(item.core_out.clone());
+    let mi_output_id = graph.files.id_from_canonical(item.mi_out.clone());
+
+    let loc = FileLoc {
+        filename: Rc::new(PathBuf::from("build")),
+        line: 0,
+    };
+
+    let mut inputs = item.mbt_deps.clone();
+    inputs.extend(item.mi_deps.iter().map(|a| a.name.clone()));
+    let input_ids = inputs
+        .iter()
+        .map(|f| graph.files.id_from_canonical(f.clone()))
+        .collect::<Vec<_>>();
+
+    let mi_files_with_alias: Vec<String> = item
+        .mi_deps
+        .iter()
+        .map(|a| format!("{}:{}", a.name, a.alias))
+        .collect();
+
+    let len = input_ids.len();
+
+    let ins = BuildIns {
+        ids: input_ids,
+        explicit: len,
+        implicit: 0,
+        order_only: 0,
+    };
+
+    let outs = BuildOuts {
+        ids: vec![core_output_id, mi_output_id],
+        explicit: 1,
+    };
+
+    let mut build = Build::new(loc, ins, outs);
+
+    let cur_pkg_warn_list = match moonc_opt.build_opt.warn_lists.get(&item.package_full_name) {
+        Some(Some(warn_list)) => warn_list,
+        _ => "",
+    };
+    let cur_pkg_alert_list = match moonc_opt.build_opt.alert_lists.get(&item.package_full_name) {
+        Some(Some(alert_list)) => alert_list,
+        _ => "",
+    };
+
+    let command = CommandBuilder::new("moonc")
+        .arg("build-package")
+        .args_with_cond(moonc_opt.render, vec!["-error-format", "json"])
+        .args(&item.mbt_deps)
+        .args_with_cond(!cur_pkg_warn_list.is_empty(), ["-w", cur_pkg_warn_list])
+        .args_with_cond(
+            !cur_pkg_alert_list.is_empty(),
+            ["-alert", cur_pkg_alert_list],
+        )
+        .arg("-o")
+        .arg(&item.core_out)
+        .arg("-pkg")
+        .arg(&item.package_full_name)
+        .arg_with_cond(item.is_main, "-is-main")
+        .args_with_prefix_separator(mi_files_with_alias, "-i")
+        .arg("-pkg-sources")
+        .arg(&format!(
+            "{}:{}",
+            &item.package_full_name, &item.package_source_dir
+        ))
+        .args(["-target", moonc_opt.build_opt.target_backend.to_flag()])
+        .arg_with_cond(moonc_opt.build_opt.debug_flag, "-g")
+        .arg_with_cond(moonc_opt.link_opt.source_map, "-source-map")
+        .args(moonc_opt.extra_build_opt.iter())
+        .build();
+    log::debug!("Command: {}", command);
+    build.cmdline = Some(command);
+    build
+}
+
+fn gen_bundle_all(
+    graph: &mut n2graph::Graph,
+    bundle_all: &N2BundleAll,
+    target_dir: &Path,
+    _moonc_opt: &MooncOpt,
+) -> Build {
+    let loc = FileLoc {
+        filename: Rc::new(PathBuf::from("bundle")),
+        line: 0,
+    };
+
+    let out = target_dir.join(&bundle_all.name).with_extension("core");
+    let core_output_id = graph.files.id_from_canonical(out.display().to_string());
+
+    let input_ids = bundle_all
+        .order
+        .iter()
+        .map(|f| graph.files.id_from_canonical(f.clone()))
+        .collect::<Vec<_>>();
+
+    let len = input_ids.len();
+
+    let ins = BuildIns {
+        ids: input_ids,
+        explicit: len,
+        implicit: 0,
+        order_only: 0,
+    };
+
+    let outs = BuildOuts {
+        ids: vec![core_output_id],
+        explicit: 1,
+    };
+
+    let mut build = Build::new(loc, ins, outs);
+
+    let command = CommandBuilder::new("moonc")
+        .arg("bundle-core")
+        .args(bundle_all.order.iter())
+        .arg("-o")
+        .arg(out.to_str().unwrap())
+        .build();
+
+    log::debug!("Command: {}", command);
+    build.cmdline = Some(command);
+    build
+}
+
+pub fn gen_n2_bundle_state(
+    input: &N2BundleInput,
+    target_dir: &Path,
+    moonc_opt: &MooncOpt,
+    moonbuild_opt: &MoonbuildOpt,
+) -> anyhow::Result<State> {
+    let mut graph = n2graph::Graph::default();
+
+    for item in input.bundle_items.iter() {
+        let build = gen_build_command(&mut graph, item, moonc_opt, moonbuild_opt);
+        graph.add_build(build)?;
+    }
+
+    {
+        let build = gen_bundle_all(&mut graph, &input.bundle_order, target_dir, moonc_opt);
+        graph.add_build(build)?;
+    }
+
+    let default = graph.get_start_nodes();
+
+    let mut hashes = n2graph::Hashes::default();
+    let db = n2::db::open(&target_dir.join("build.moon_db"), &mut graph, &mut hashes)?;
+
+    Ok(State {
+        graph,
+        db,
+        hashes,
+        default,
+        pools: SmallMap::default(),
+    })
+}
diff --git a/crates/moonbuild/src/gen/gen_check.rs b/crates/moonbuild/src/gen/gen_check.rs
new file mode 100644
index 00000000..7c62a957
--- /dev/null
+++ b/crates/moonbuild/src/gen/gen_check.rs
@@ -0,0 +1,344 @@
+use super::cmd_builder::CommandBuilder;
+use crate::gen::MiAlias;
+use anyhow::bail;
+use indexmap::map::IndexMap;
+use moonutil::module::ModuleDB;
+use moonutil::package::Package;
+use std::path::{Path, PathBuf};
+use std::rc::Rc;
+
+use moonutil::common::{MoonbuildOpt, MooncOpt, MOON_PKG_JSON};
+use n2::graph::{self as n2graph, Build, BuildIns, BuildOuts, FileLoc};
+use n2::load::State;
+use n2::smallmap::SmallMap;
+
+#[derive(Debug)]
+pub struct CheckDepItem {
+    pub mi_out: String,
+    pub mbt_deps: Vec<String>,
+    pub mi_deps: Vec<MiAlias>,
+    pub package_full_name: String,
+    pub package_source_dir: String,
+    pub is_main: bool,
+}
+
+#[derive(Debug)]
+pub struct N2CheckInput {
+    pub dep_items: Vec<CheckDepItem>,
+}
+
+fn pkg_to_check_item(
+    source_dir: &Path,
+    packages: &IndexMap<String, Package>,
+    pkg: &Package,
+    moonc_opt: &MooncOpt,
+) -> anyhow::Result<CheckDepItem> {
+    let out = pkg.artifact.with_extension("mi");
+
+    let backend_filtered =
+        moonutil::common::backend_filter(&pkg.files, moonc_opt.link_opt.target_backend);
+    let mbt_deps: Vec<String> = backend_filtered
+        .iter()
+        .map(|f| f.display().to_string())
+        .collect::<Vec<_>>();
+
+    let mut mi_deps = vec![];
+
+    for dep in pkg.imports.iter() {
+        let full_import_name = dep.path.make_full_path();
+        if !packages.contains_key(&full_import_name) {
+            bail!(
+                "{}: the imported package `{}` could not be located.",
+                source_dir
+                    .join(pkg.rel.fs_full_name())
+                    .join(MOON_PKG_JSON)
+                    .display(),
+                full_import_name,
+            );
+        }
+        let cur_pkg = &packages[&full_import_name];
+        let d = cur_pkg.artifact.with_extension("mi");
+        let alias = dep.alias.clone().unwrap_or(cur_pkg.last_name().into());
+        mi_deps.push(MiAlias {
+            name: d.display().to_string(),
+            alias,
+        });
+    }
+
+    let package_full_name = pkg.full_name();
+    let package_source_dir: String = pkg.root_path.to_string_lossy().into_owned();
+
+    Ok(CheckDepItem {
+        mi_out: out.display().to_string(),
+        mbt_deps,
+        mi_deps,
+        package_full_name,
+        package_source_dir,
+        is_main: pkg.is_main,
+    })
+}
+
+fn pkg_with_wbtest_to_check_item(
+    source_dir: &Path,
+    packages: &IndexMap<String, Package>,
+    pkg: &Package,
+    moonc_opt: &MooncOpt,
+) -> anyhow::Result<CheckDepItem> {
+    let out = pkg
+        .artifact
+        .with_file_name(format!("{}.underscore_test.mi", pkg.last_name()));
+
+    let backend_filtered = moonutil::common::backend_filter(
+        &pkg.files
+            .iter()
+            .chain(pkg.wbtest_files.iter())
+            .cloned()
+            .collect::<Vec<_>>(),
+        moonc_opt.link_opt.target_backend,
+    );
+    let mbt_deps: Vec<String> = backend_filtered
+        .iter()
+        .map(|f| f.display().to_string())
+        .collect::<Vec<_>>();
+
+    let mut mi_deps = vec![];
+
+    for dep in pkg.imports.iter().chain(pkg.wbtest_imports.iter()) {
+        let full_import_name = dep.path.make_full_path();
+        if !packages.contains_key(&full_import_name) {
+            bail!(
+                "{}: the imported package `{}` could not be located.",
+                source_dir
+                    .join(pkg.rel.fs_full_name())
+                    .join(MOON_PKG_JSON)
+                    .display(),
+                full_import_name,
+            );
+        }
+        let cur_pkg = &packages[&full_import_name];
+        let d = cur_pkg.artifact.with_extension("mi");
+        let alias = dep.alias.clone().unwrap_or(cur_pkg.last_name().into());
+        mi_deps.push(MiAlias {
+            name: d.display().to_string(),
+            alias,
+        });
+    }
+
+    let package_full_name = pkg.full_name();
+    let package_source_dir: String = pkg.root_path.to_string_lossy().into_owned();
+
+    Ok(CheckDepItem {
+        mi_out: out.display().to_string(),
+        mbt_deps,
+        mi_deps,
+        package_full_name,
+        package_source_dir,
+        is_main: pkg.is_main,
+    })
+}
+
+fn pkg_with_test_to_check_item(
+    source_dir: &Path,
+    packages: &IndexMap<String, Package>,
+    pkg: &Package,
+    moonc_opt: &MooncOpt,
+) -> anyhow::Result<CheckDepItem> {
+    let out = pkg
+        .artifact
+        .with_file_name(format!("{}.blackbox_test.mi", pkg.last_name()));
+
+    let backend_filtered =
+        moonutil::common::backend_filter(&pkg.test_files, moonc_opt.link_opt.target_backend);
+    let mbt_deps: Vec<String> = backend_filtered
+        .iter()
+        .map(|f| f.display().to_string())
+        .collect::<Vec<_>>();
+
+    // add cur pkg as .mi dependency
+    let mut mi_deps = vec![MiAlias {
+        name: pkg
+            .artifact
+            .with_file_name(format!("{}.mi", pkg.last_name()))
+            .display()
+            .to_string(),
+        alias: pkg.last_name().into(),
+    }];
+
+    for dep in pkg.imports.iter().chain(pkg.test_imports.iter()) {
+        let full_import_name = dep.path.make_full_path();
+        if !packages.contains_key(&full_import_name) {
+            bail!(
+                "{}: the imported package `{}` could not be located.",
+                source_dir
+                    .join(pkg.rel.fs_full_name())
+                    .join(MOON_PKG_JSON)
+                    .display(),
+                full_import_name,
+            );
+        }
+        let cur_pkg = &packages[&full_import_name];
+        let d = cur_pkg.artifact.with_extension("mi");
+        let alias = dep.alias.clone().unwrap_or(cur_pkg.last_name().into());
+        mi_deps.push(MiAlias {
+            name: d.display().to_string(),
+            alias,
+        });
+    }
+
+    // this is used for `-pkg` flag in `moonc check`, shouldn't be `pkg.full_name()` since we aren't check that package, otherwise we might encounter an error like "4015] Error: Type StructName has no method method_name"(however, StructName does has method method_name).
+    // actually, `-pkg` flag is not necessary for blackbox test, but we still keep it for consistency
+    let package_full_name = pkg.full_name() + "_blackbox_test";
+    let package_source_dir: String = pkg.root_path.to_string_lossy().into_owned();
+
+    Ok(CheckDepItem {
+        mi_out: out.display().to_string(),
+        mbt_deps,
+        mi_deps,
+        package_full_name,
+        package_source_dir,
+        is_main: pkg.is_main,
+    })
+}
+
+pub fn gen_check(
+    m: &ModuleDB,
+    moonc_opt: &MooncOpt,
+    moonbuild_opt: &MoonbuildOpt,
+) -> anyhow::Result<N2CheckInput> {
+    let _ = moonc_opt;
+    let _ = moonbuild_opt;
+    let mut dep_items = vec![];
+    for (_, pkg) in m.packages.iter() {
+        let item = pkg_to_check_item(&pkg.root_path, &m.packages, pkg, moonc_opt)?;
+        dep_items.push(item);
+        if !pkg.wbtest_files.is_empty() {
+            let item = pkg_with_wbtest_to_check_item(&pkg.root_path, &m.packages, pkg, moonc_opt)?;
+            dep_items.push(item);
+        }
+        if !pkg.test_files.is_empty() {
+            let item = pkg_with_test_to_check_item(&pkg.root_path, &m.packages, pkg, moonc_opt)?;
+            dep_items.push(item);
+        }
+    }
+    Ok(N2CheckInput { dep_items })
+}
+
+pub fn gen_check_command(
+    graph: &mut n2graph::Graph,
+    item: &CheckDepItem,
+    moonc_opt: &MooncOpt,
+) -> Build {
+    let mi_output_id = graph.files.id_from_canonical(item.mi_out.clone());
+    let loc = FileLoc {
+        filename: Rc::new(PathBuf::from("check")),
+        line: 0,
+    };
+
+    let mut inputs = item.mbt_deps.clone();
+    inputs.extend(item.mi_deps.iter().map(|a| a.name.clone()));
+
+    let input_ids = inputs
+        .into_iter()
+        .map(|f| graph.files.id_from_canonical(f))
+        .collect::<Vec<_>>();
+
+    let len = input_ids.len();
+
+    let ins = BuildIns {
+        ids: input_ids,
+        explicit: len,
+        implicit: 0,
+        order_only: 0,
+    };
+
+    let mi_files_with_alias: Vec<String> = item
+        .mi_deps
+        .iter()
+        .map(|a| format!("{}:{}", a.name, a.alias))
+        .collect();
+
+    let outs = BuildOuts {
+        ids: vec![mi_output_id],
+        explicit: 1,
+    };
+
+    let mut build = Build::new(loc, ins, outs);
+
+    let cur_pkg_warn_list = match moonc_opt.build_opt.warn_lists.get(&item.package_full_name) {
+        Some(Some(warn_list)) => warn_list,
+        _ => "",
+    };
+    let cur_pkg_alert_list = match moonc_opt.build_opt.alert_lists.get(&item.package_full_name) {
+        Some(Some(alert_list)) => alert_list,
+        _ => "",
+    };
+
+    let command = CommandBuilder::new("moonc")
+        .arg("check")
+        .args_with_cond(moonc_opt.render, vec!["-error-format", "json"])
+        .args_with_cond(
+            moonc_opt.build_opt.deny_warn,
+            // the default strategy for warn and alert is +a and +all-raise-throw-unsafe+deprecated
+            // we replace + with @ to tell moonc treat warning as error
+            ["-w", "@a", "-alert", "@all-raise-throw-unsafe+deprecated"],
+        )
+        .args(&item.mbt_deps)
+        .args_with_cond(!cur_pkg_warn_list.is_empty(), ["-w", cur_pkg_warn_list])
+        .args_with_cond(
+            !cur_pkg_alert_list.is_empty(),
+            ["-alert", cur_pkg_alert_list],
+        )
+        .arg("-o")
+        .arg(&item.mi_out)
+        .arg("-pkg")
+        .arg(&item.package_full_name)
+        .arg_with_cond(item.is_main, "-is-main")
+        .args_with_cond(
+            !moonc_opt.nostd,
+            [
+                "-std-path",
+                moonutil::moon_dir::core_bundle(moonc_opt.link_opt.target_backend)
+                    .to_str()
+                    .unwrap(),
+            ],
+        )
+        .args_with_prefix_separator(mi_files_with_alias, "-i")
+        .arg("-pkg-sources")
+        .arg(&format!(
+            "{}:{}",
+            &item.package_full_name, &item.package_source_dir
+        ))
+        .args(["-target", moonc_opt.build_opt.target_backend.to_flag()])
+        .build();
+    log::debug!("Command: {}", command);
+    build.cmdline = Some(command);
+    build
+}
+
+pub fn gen_n2_check_state(
+    input: &N2CheckInput,
+    target_dir: &Path,
+    moonc_opt: &MooncOpt,
+    moonbuild_opt: &MoonbuildOpt,
+) -> anyhow::Result<State> {
+    let _ = moonbuild_opt;
+    let mut graph = n2graph::Graph::default();
+
+    for item in input.dep_items.iter() {
+        let build = gen_check_command(&mut graph, item, moonc_opt);
+        graph.add_build(build)?;
+    }
+
+    let mut hashes = n2graph::Hashes::default();
+    let db = n2::db::open(&target_dir.join("check.moon_db"), &mut graph, &mut hashes)?;
+
+    let default = graph.get_start_nodes();
+
+    Ok(State {
+        graph,
+        db,
+        hashes,
+        default,
+        pools: SmallMap::default(),
+    })
+}
diff --git a/crates/moonbuild/src/gen/gen_runtest.rs b/crates/moonbuild/src/gen/gen_runtest.rs
new file mode 100644
index 00000000..bed0199b
--- /dev/null
+++ b/crates/moonbuild/src/gen/gen_runtest.rs
@@ -0,0 +1,854 @@
+use anyhow::{bail, Ok};
+use colored::Colorize;
+use moonutil::common::{GeneratedTestDriver, MOONBITLANG_CORE};
+use moonutil::module::ModuleDB;
+use moonutil::package::Package;
+
+use super::cmd_builder::CommandBuilder;
+use std::collections::HashSet;
+use std::path::{Path, PathBuf};
+use std::rc::Rc;
+
+use moonutil::common::{MoonbuildOpt, MooncOpt, MOON_PKG_JSON};
+use n2::graph::{self as n2graph, Build, BuildIns, BuildOuts, FileLoc};
+use n2::load::State;
+use n2::smallmap::SmallMap;
+
+use crate::gen::MiAlias;
+
+#[derive(Debug)]
+pub struct RuntestDepItem {
+    pub core_out: String,
+    pub mi_out: String,
+    pub mbt_deps: Vec<String>,
+    pub mi_deps: Vec<MiAlias>, // do not need add parent's mi files
+    pub package_full_name: String,
+    pub package_source_dir: String,
+    pub is_main: bool,
+    pub is_third_party: bool,
+}
+
+#[derive(Debug)]
+pub struct RuntestLinkDepItem {
+    pub out: String,
+    pub core_deps: Vec<String>, // need add parent's core files recursively
+    pub package_full_name: String,
+    pub package_sources: Vec<(String, String)>, // (pkgname, source_dir)
+    pub is_main: bool,
+    pub link: Option<moonutil::package::Link>,
+}
+
+#[derive(Debug)]
+pub struct N2RuntestInput<'a> {
+    pub build_items: Vec<RuntestDepItem>,
+    pub link_items: Vec<RuntestLinkDepItem>, // entry points
+    pub driver_files: Vec<&'a Path>,
+    pub files_contain_test_block: Vec<&'a Path>,
+}
+
+pub fn gen_package_core(
+    m: &ModuleDB,
+    pkg: &Package,
+    moonc_opt: &MooncOpt,
+) -> anyhow::Result<RuntestDepItem> {
+    let core_out = pkg.artifact.with_extension("core");
+    let mi_out = pkg.artifact.with_extension("mi");
+
+    let backend_filtered: Vec<PathBuf> =
+        moonutil::common::backend_filter(&pkg.files, moonc_opt.link_opt.target_backend);
+    let mbt_deps = backend_filtered
+        .iter()
+        .map(|f| f.display().to_string())
+        .collect();
+
+    let mut mi_deps = vec![];
+    for dep in pkg.imports.iter() {
+        let full_import_name = dep.path.make_full_path();
+        if !m.packages.contains_key(&full_import_name) {
+            bail!(
+                "{}: the imported package `{}` could not be located.",
+                m.source_dir
+                    .join(pkg.rel.fs_full_name())
+                    .join(MOON_PKG_JSON)
+                    .display(),
+                full_import_name,
+            );
+        }
+        let cur_pkg = &m.packages[&full_import_name];
+        let d = cur_pkg.artifact.with_extension("mi");
+        let alias = dep.alias.clone().unwrap_or(cur_pkg.last_name().into());
+        mi_deps.push(MiAlias {
+            name: d.display().to_string(),
+            alias,
+        });
+    }
+
+    let package_full_name = pkg.full_name();
+    let package_source_dir = pkg.root_path.to_string_lossy().into_owned();
+
+    Ok(RuntestDepItem {
+        core_out: core_out.display().to_string(),
+        mi_out: mi_out.display().to_string(),
+        mbt_deps,
+        mi_deps,
+        package_full_name,
+        package_source_dir,
+        is_main: false,
+        is_third_party: pkg.is_third_party,
+    })
+}
+
+pub fn gen_package_internal_test(
+    m: &ModuleDB,
+    pkg: &Package,
+    moonc_opt: &MooncOpt,
+) -> anyhow::Result<RuntestDepItem> {
+    let pkgname = pkg.artifact.file_stem().unwrap().to_str().unwrap();
+    let core_out = pkg
+        .artifact
+        .with_file_name(format!("{}.internal_test.core", pkgname));
+    let mi_out = pkg
+        .artifact
+        .with_file_name(format!("{}.internal_test.mi", pkgname));
+
+    let backend_filtered =
+        moonutil::common::backend_filter(&pkg.files, moonc_opt.link_opt.target_backend);
+    let mut mbt_deps: Vec<String> = backend_filtered
+        .iter()
+        .map(|f| f.display().to_string())
+        .collect();
+
+    for item in pkg.generated_test_drivers.iter() {
+        if let GeneratedTestDriver::InternalTest(path) = item {
+            mbt_deps.push(path.display().to_string());
+        }
+    }
+
+    let mut mi_deps = vec![];
+    for dep in pkg.imports.iter() {
+        let full_import_name = dep.path.make_full_path();
+        if !m.packages.contains_key(&full_import_name) {
+            bail!(
+                "{}: the imported package `{}` could not be located.",
+                m.source_dir
+                    .join(pkg.rel.fs_full_name())
+                    .join(MOON_PKG_JSON)
+                    .display(),
+                full_import_name,
+            );
+        }
+        let cur_pkg = &m.packages[&full_import_name];
+        let d = cur_pkg.artifact.with_extension("mi");
+        let alias = dep.alias.clone().unwrap_or(cur_pkg.last_name().into());
+        mi_deps.push(MiAlias {
+            name: d.display().to_string(),
+            alias,
+        });
+    }
+
+    let package_full_name = pkg.full_name();
+    let package_source_dir = pkg.root_path.to_string_lossy().into_owned();
+
+    Ok(RuntestDepItem {
+        core_out: core_out.display().to_string(),
+        mi_out: mi_out.display().to_string(),
+        mbt_deps,
+        mi_deps,
+        package_full_name,
+        package_source_dir,
+        is_main: true,
+        is_third_party: pkg.is_third_party,
+    })
+}
+
+pub fn gen_package_underscore_test(
+    m: &ModuleDB,
+    pkg: &Package,
+    moonc_opt: &MooncOpt,
+) -> anyhow::Result<RuntestDepItem> {
+    let pkgname = pkg.artifact.file_stem().unwrap().to_str().unwrap();
+    let core_out = pkg
+        .artifact
+        .with_file_name(format!("{}.underscore_test.core", pkgname));
+    let mi_out = pkg
+        .artifact
+        .with_file_name(format!("{}.underscore_test.mi", pkgname));
+
+    let backend_filtered =
+        moonutil::common::backend_filter(&pkg.files, moonc_opt.link_opt.target_backend);
+    let mut mbt_deps: Vec<String> = backend_filtered
+        .iter()
+        .chain(pkg.wbtest_files.iter())
+        .map(|f| f.display().to_string())
+        .collect();
+
+    for item in pkg.generated_test_drivers.iter() {
+        if let GeneratedTestDriver::UnderscoreTest(path) = item {
+            mbt_deps.push(path.display().to_string());
+        }
+    }
+
+    let mut mi_deps = vec![];
+    for dep in pkg.imports.iter().chain(pkg.wbtest_imports.iter()) {
+        let full_import_name = dep.path.make_full_path();
+        if !m.packages.contains_key(&full_import_name) {
+            bail!(
+                "{}: the imported package `{}` could not be located.",
+                m.source_dir
+                    .join(pkg.rel.fs_full_name())
+                    .join(MOON_PKG_JSON)
+                    .display(),
+                full_import_name,
+            );
+        }
+        let cur_pkg = &m.packages[&full_import_name];
+        let d = cur_pkg.artifact.with_extension("mi");
+        let alias = dep.alias.clone().unwrap_or(cur_pkg.last_name().into());
+        mi_deps.push(MiAlias {
+            name: d.display().to_string(),
+            alias,
+        });
+    }
+
+    let package_full_name = pkg.full_name();
+    let package_source_dir = pkg.root_path.to_string_lossy().into_owned();
+
+    Ok(RuntestDepItem {
+        core_out: core_out.display().to_string(),
+        mi_out: mi_out.display().to_string(),
+        mbt_deps,
+        mi_deps,
+        package_full_name,
+        package_source_dir,
+        is_main: true,
+        is_third_party: pkg.is_third_party,
+    })
+}
+
+pub fn gen_package_blackbox_test(
+    m: &ModuleDB,
+    pkg: &Package,
+    moonc_opt: &MooncOpt,
+) -> anyhow::Result<RuntestDepItem> {
+    let pkgname = pkg.artifact.file_stem().unwrap().to_str().unwrap();
+    let core_out = pkg
+        .artifact
+        .with_file_name(format!("{}.blackbox_test.core", pkgname));
+    let mi_out = pkg
+        .artifact
+        .with_file_name(format!("{}.blackbox_test.mi", pkgname));
+
+    let backend_filtered =
+        moonutil::common::backend_filter(&pkg.test_files, moonc_opt.link_opt.target_backend);
+    let mut mbt_deps: Vec<String> = backend_filtered
+        .iter()
+        .map(|f| f.display().to_string())
+        .collect();
+
+    for item in pkg.generated_test_drivers.iter() {
+        if let GeneratedTestDriver::BlackboxTest(path) = item {
+            mbt_deps.push(path.display().to_string());
+        }
+    }
+
+    // add the cur pkg .mi at build-package stage
+    let mut mi_deps = vec![MiAlias {
+        name: pkg
+            .artifact
+            .with_file_name(format!("{}.mi", pkgname))
+            .display()
+            .to_string(),
+        alias: pkg.last_name().into(),
+    }];
+
+    for dep in pkg.imports.iter().chain(pkg.test_imports.iter()) {
+        let full_import_name = dep.path.make_full_path();
+        if !m.packages.contains_key(&full_import_name) {
+            bail!(
+                "{}: the imported package `{}` could not be located.",
+                m.source_dir
+                    .join(pkg.rel.fs_full_name())
+                    .join(MOON_PKG_JSON)
+                    .display(),
+                full_import_name,
+            );
+        }
+        let cur_pkg = &m.packages[&full_import_name];
+        let d = cur_pkg.artifact.with_extension("mi");
+        let alias = dep.alias.clone().unwrap_or(cur_pkg.last_name().into());
+        mi_deps.push(MiAlias {
+            name: d.display().to_string(),
+            alias,
+        });
+    }
+
+    // this is used for `-pkg` flag in `moonc build-package`, shouldn't be `pkg.full_name()` since we aren't build that package, otherwise we might encounter an error like "4015] Error: Type StructName has no method method_name"(however, StructName does has method method_name).
+    // actually, `-pkg` flag is not necessary for blackbox test, but we still keep it for consistency
+    let package_full_name = pkg.full_name() + "_blackbox_test";
+    let package_source_dir: String = pkg.root_path.to_string_lossy().into_owned();
+
+    Ok(RuntestDepItem {
+        core_out: core_out.display().to_string(),
+        mi_out: mi_out.display().to_string(),
+        mbt_deps,
+        mi_deps,
+        package_full_name,
+        package_source_dir,
+        is_main: true,
+        is_third_party: pkg.is_third_party,
+    })
+}
+
+fn get_pkg_topo_order<'a>(
+    m: &'a ModuleDB,
+    leaf: &Package,
+    with_wbtest_import: bool,
+    with_test_import: bool,
+) -> Vec<&'a Package> {
+    let mut visited: HashSet<String> = HashSet::new();
+    let mut pkg_topo_order: Vec<&Package> = vec![];
+    fn dfs<'a>(
+        m: &'a ModuleDB,
+        pkg_topo_order: &mut Vec<&'a Package>,
+        visited: &mut HashSet<String>,
+        cur_pkg_full_name: &String,
+        with_wbtest_import: bool,
+        with_test_import: bool,
+    ) {
+        if visited.contains(cur_pkg_full_name) {
+            return;
+        }
+        visited.insert(cur_pkg_full_name.clone());
+        let cur_pkg = &m.packages[cur_pkg_full_name];
+        let imports = cur_pkg
+            .imports
+            .iter()
+            .chain(if with_wbtest_import {
+                cur_pkg.wbtest_imports.iter()
+            } else {
+                [].iter()
+            })
+            .chain(if with_test_import {
+                cur_pkg.test_imports.iter()
+            } else {
+                [].iter()
+            });
+
+        for dep in imports {
+            dfs(
+                m,
+                pkg_topo_order,
+                visited,
+                &dep.path.make_full_path(),
+                false,
+                false,
+            );
+        }
+
+        pkg_topo_order.push(cur_pkg);
+    }
+    dfs(
+        m,
+        &mut pkg_topo_order,
+        &mut visited,
+        &leaf.full_name(),
+        with_wbtest_import,
+        with_test_import,
+    );
+    pkg_topo_order
+}
+
+fn get_package_sources(m: &ModuleDB, pkg_topo_order: &[&Package]) -> Vec<(String, String)> {
+    let mut package_sources = vec![];
+    for cur_pkg in pkg_topo_order {
+        let package_source_dir: String = if cur_pkg.rel.components.is_empty() {
+            m.source_dir.display().to_string()
+        } else {
+            m.source_dir
+                .join(cur_pkg.rel.fs_full_name())
+                .display()
+                .to_string()
+        };
+        package_sources.push((cur_pkg.full_name(), package_source_dir));
+    }
+    package_sources
+}
+
+pub fn gen_link_internal_test(
+    m: &ModuleDB,
+    pkg: &Package,
+    _moonc_opt: &MooncOpt,
+) -> anyhow::Result<RuntestLinkDepItem> {
+    let out = pkg
+        .artifact
+        .with_file_name(format!("{}.internal_test.wat", pkg.last_name()));
+
+    let pkg_topo_order: Vec<&Package> = get_pkg_topo_order(m, pkg, false, false);
+
+    let mut core_deps = vec![];
+    for cur_pkg in pkg_topo_order.iter() {
+        let d = if cur_pkg.full_name() == pkg.full_name() {
+            cur_pkg
+                .artifact
+                .with_file_name(format!("{}.internal_test.core", cur_pkg.last_name()))
+        } else {
+            cur_pkg.artifact.with_extension("core")
+        };
+        core_deps.push(d.display().to_string());
+    }
+    let package_sources = get_package_sources(m, &pkg_topo_order);
+
+    let package_full_name = pkg.full_name();
+
+    Ok(RuntestLinkDepItem {
+        out: out.display().to_string(),
+        core_deps,
+        package_full_name,
+        package_sources,
+        is_main: true,
+        link: pkg.link.clone(),
+    })
+}
+
+pub fn gen_link_underscore_test(
+    m: &ModuleDB,
+    pkg: &Package,
+    _moonc_opt: &MooncOpt,
+) -> anyhow::Result<RuntestLinkDepItem> {
+    let out = pkg
+        .artifact
+        .with_file_name(format!("{}.underscore_test.wat", pkg.last_name()));
+
+    let pkg_topo_order: Vec<&Package> = get_pkg_topo_order(m, pkg, true, false);
+
+    let mut core_deps = vec![];
+    for cur_pkg in pkg_topo_order.iter() {
+        let d = if cur_pkg.full_name() == pkg.full_name() {
+            cur_pkg
+                .artifact
+                .with_file_name(format!("{}.underscore_test.core", cur_pkg.last_name()))
+        } else {
+            cur_pkg.artifact.with_extension("core")
+        };
+        core_deps.push(d.display().to_string());
+    }
+
+    let package_sources = get_package_sources(m, &pkg_topo_order);
+
+    let package_full_name = pkg.full_name();
+
+    Ok(RuntestLinkDepItem {
+        out: out.display().to_string(),
+        core_deps,
+        package_full_name,
+        package_sources,
+        is_main: true,
+        link: pkg.link.clone(),
+    })
+}
+
+pub fn gen_link_blackbox_test(
+    m: &ModuleDB,
+    pkg: &Package,
+    _moonc_opt: &MooncOpt,
+) -> anyhow::Result<RuntestLinkDepItem> {
+    let pkgname = pkg.artifact.file_stem().unwrap().to_str().unwrap();
+    let out = pkg
+        .artifact
+        .with_file_name(format!("{}.blackbox_test.wat", pkg.last_name()));
+
+    let pkg_topo_order: Vec<&Package> = get_pkg_topo_order(m, pkg, false, true);
+
+    let mut core_deps = vec![];
+    for cur_pkg in pkg_topo_order.iter() {
+        let d = if cur_pkg.full_name() == pkg.full_name() {
+            // add the cur pkg .core in link-core stage
+            // make sure that the current package `.core` is placed before `blackbox_test.core`
+            core_deps.push(
+                pkg.artifact
+                    .with_file_name(format!("{}.core", pkgname))
+                    .display()
+                    .to_string(),
+            );
+
+            cur_pkg
+                .artifact
+                .with_file_name(format!("{}.blackbox_test.core", cur_pkg.last_name()))
+        } else {
+            cur_pkg.artifact.with_extension("core")
+        };
+        core_deps.push(d.display().to_string());
+    }
+
+    let package_sources = get_package_sources(m, &pkg_topo_order);
+
+    let package_full_name = pkg.full_name();
+
+    Ok(RuntestLinkDepItem {
+        out: out.display().to_string(),
+        core_deps,
+        package_full_name,
+        package_sources,
+        is_main: true,
+        link: pkg.link.clone(),
+    })
+}
+
+pub fn contain_mbt_test_file(pkg: &Package, moonc_opt: &MooncOpt) -> bool {
+    let backend_filtered =
+        moonutil::common::backend_filter(&pkg.files, moonc_opt.link_opt.target_backend);
+    backend_filtered.iter().any(|f| {
+        let filename = f.file_name().unwrap().to_str().unwrap().to_string();
+        filename.ends_with("_test.mbt")
+    })
+}
+
+pub fn gen_runtest<'a>(
+    m: &'a ModuleDB,
+    moonc_opt: &MooncOpt,
+    moonbuild_opt: &MoonbuildOpt,
+) -> anyhow::Result<N2RuntestInput<'a>> {
+    let mut build_items = vec![];
+    let mut link_items = vec![];
+    let mut driver_files = vec![];
+    let mut files_contain_test_block = vec![];
+
+    let filter_pkg = moonbuild_opt
+        .test_opt
+        .as_ref()
+        .and_then(|f| f.filter_package.as_ref());
+
+    for (pkgname, pkg) in m.packages.iter() {
+        if pkg.is_main {
+            continue;
+        }
+
+        build_items.push(gen_package_core(m, pkg, moonc_opt)?);
+
+        if pkg.is_third_party {
+            continue;
+        }
+
+        files_contain_test_block.extend(pkg.files_contain_test_block.iter().map(|it| it.as_path()));
+
+        if let Some(filter_pkg) = filter_pkg {
+            if !filter_pkg.contains(Path::new(pkgname)) {
+                continue;
+            }
+        }
+
+        for item in pkg.generated_test_drivers.iter() {
+            if let GeneratedTestDriver::InternalTest(it) = item {
+                build_items.push(gen_package_internal_test(m, pkg, moonc_opt)?);
+                link_items.push(gen_link_internal_test(m, pkg, moonc_opt)?);
+                driver_files.push(it.as_path());
+            }
+        }
+
+        if !pkg.wbtest_files.is_empty() {
+            for item in pkg.generated_test_drivers.iter() {
+                if let GeneratedTestDriver::UnderscoreTest(it) = item {
+                    build_items.push(gen_package_underscore_test(m, pkg, moonc_opt)?);
+                    link_items.push(gen_link_underscore_test(m, pkg, moonc_opt)?);
+                    driver_files.push(it.as_path());
+                }
+            }
+        }
+
+        if !pkg.test_files.is_empty() {
+            for item in pkg.generated_test_drivers.iter() {
+                if let GeneratedTestDriver::BlackboxTest(it) = item {
+                    build_items.push(gen_package_blackbox_test(m, pkg, moonc_opt)?);
+                    link_items.push(gen_link_blackbox_test(m, pkg, moonc_opt)?);
+                    driver_files.push(it.as_path());
+                }
+            }
+        }
+    }
+
+    Ok(N2RuntestInput {
+        build_items,
+        link_items,
+        driver_files,
+        files_contain_test_block,
+    })
+}
+
+pub fn gen_runtest_build_command(
+    graph: &mut n2graph::Graph,
+    item: &RuntestDepItem,
+    moonc_opt: &MooncOpt,
+) -> Build {
+    let core_output_id = graph.files.id_from_canonical(item.core_out.clone());
+    let mi_output_id = graph.files.id_from_canonical(item.mi_out.clone());
+
+    let loc = FileLoc {
+        filename: Rc::new(PathBuf::from("build")),
+        line: 0,
+    };
+
+    let mut inputs = item.mbt_deps.clone();
+    inputs.extend(item.mi_deps.iter().map(|a| a.name.clone()));
+    let input_ids = inputs
+        .into_iter()
+        .map(|f| graph.files.id_from_canonical(f))
+        .collect::<Vec<_>>();
+
+    let mi_files_with_alias: Vec<String> = item
+        .mi_deps
+        .iter()
+        .map(|a| format!("{}:{}", a.name, a.alias))
+        .collect();
+
+    let len = input_ids.len();
+
+    let ins = BuildIns {
+        ids: input_ids,
+        explicit: len,
+        implicit: 0,
+        order_only: 0,
+    };
+
+    let outs = BuildOuts {
+        ids: vec![core_output_id, mi_output_id],
+        explicit: 1,
+    };
+
+    // WORKAROUND: do not test coverage on coverage library itself, because of cyclic dependency
+    let enable_coverage = moonc_opt.build_opt.enable_coverage
+        && !super::is_skip_coverage_lib(&item.package_full_name)
+        && !item.is_third_party;
+    // WORKAROUND: lang core/builtin and core/coverage should be able to cover themselves
+    let self_coverage = enable_coverage && super::is_self_coverage_lib(&item.package_full_name);
+
+    let mut build = Build::new(loc, ins, outs);
+
+    let cur_pkg_warn_list = match moonc_opt.build_opt.warn_lists.get(&item.package_full_name) {
+        Some(Some(warn_list)) => warn_list,
+        _ => "",
+    };
+    let cur_pkg_alert_list = match moonc_opt.build_opt.alert_lists.get(&item.package_full_name) {
+        Some(Some(alert_list)) => alert_list,
+        _ => "",
+    };
+
+    let command = CommandBuilder::new("moonc")
+        .arg("build-package")
+        .args_with_cond(moonc_opt.render, vec!["-error-format", "json"])
+        .args(&item.mbt_deps)
+        .args_with_cond(!cur_pkg_warn_list.is_empty(), ["-w", cur_pkg_warn_list])
+        .args_with_cond(
+            !cur_pkg_alert_list.is_empty(),
+            ["-alert", cur_pkg_alert_list],
+        )
+        .arg("-o")
+        .arg(&item.core_out)
+        .arg("-pkg")
+        .arg(&item.package_full_name)
+        .arg_with_cond(item.is_main, "-is-main")
+        .args_with_cond(
+            !moonc_opt.nostd,
+            [
+                "-std-path",
+                moonutil::moon_dir::core_bundle(moonc_opt.link_opt.target_backend)
+                    .to_str()
+                    .unwrap(),
+            ],
+        )
+        .args_with_prefix_separator(mi_files_with_alias, "-i")
+        .arg("-pkg-sources")
+        .arg(&format!(
+            "{}:{}",
+            &item.package_full_name, &item.package_source_dir
+        ))
+        .args(["-target", moonc_opt.build_opt.target_backend.to_flag()])
+        .arg_with_cond(moonc_opt.build_opt.debug_flag, "-g")
+        .arg_with_cond(enable_coverage, "-enable-coverage")
+        .arg_with_cond(self_coverage, "-coverage-package-override=@self")
+        .args(moonc_opt.extra_build_opt.iter())
+        .build();
+    log::debug!("Command: {}", command);
+    build.cmdline = Some(command);
+    build
+}
+
+pub fn gen_runtest_link_command(
+    graph: &mut n2graph::Graph,
+    item: &RuntestLinkDepItem,
+    moonc_opt: &MooncOpt,
+) -> (Build, n2graph::FileId) {
+    let artifact_output_path = PathBuf::from(&item.out)
+        .with_extension(moonc_opt.link_opt.output_format.to_str())
+        .display()
+        .to_string();
+
+    let artifact_id = graph.files.id_from_canonical(artifact_output_path.clone());
+
+    let loc = FileLoc {
+        filename: Rc::new(PathBuf::from("build")),
+        line: 0,
+    };
+
+    let input_ids = item
+        .core_deps
+        .iter()
+        .map(|f| graph.files.id_from_canonical(f.clone()))
+        .collect::<Vec<_>>();
+    let len = input_ids.len();
+
+    let ins = BuildIns {
+        ids: input_ids,
+        explicit: len,
+        implicit: 0,
+        order_only: 0,
+    };
+
+    let outs = BuildOuts {
+        ids: vec![artifact_id],
+        explicit: 1,
+    };
+
+    let mut build = Build::new(loc, ins, outs);
+
+    let command = CommandBuilder::new("moonc")
+        .arg("link-core")
+        .arg_with_cond(
+            !moonc_opt.nostd,
+            moonutil::moon_dir::core_core(moonc_opt.link_opt.target_backend)
+                .to_str()
+                .unwrap(),
+        )
+        .args(&item.core_deps)
+        .arg("-main")
+        .arg(&item.package_full_name)
+        .arg("-o")
+        .arg(&artifact_output_path)
+        .arg("-test-mode") // always passing -test-mode to allow recover from panic
+        .args_with_prefix_separator(
+            item.package_sources
+                .iter()
+                .map(|(pkg, src)| format!("{}:{}", pkg, src)),
+            "-pkg-sources",
+        )
+        .args_with_cond(
+            !moonc_opt.nostd,
+            [
+                "-pkg-sources",
+                &format!(
+                    "{}:{}",
+                    MOONBITLANG_CORE,
+                    &moonutil::moon_dir::core().display()
+                ),
+            ],
+        )
+        .args(["-target", moonc_opt.link_opt.target_backend.to_flag()])
+        .arg_with_cond(moonc_opt.link_opt.debug_flag, "-g")
+        .args(moonc_opt.extra_link_opt.iter())
+        .build();
+    log::debug!("Command: {}", command);
+    build.cmdline = Some(command);
+    (build, artifact_id)
+}
+
+pub fn gen_n2_runtest_state(
+    input: &N2RuntestInput,
+    moonc_opt: &MooncOpt,
+    moonbuild_opt: &MoonbuildOpt,
+) -> anyhow::Result<State> {
+    let _ = moonbuild_opt;
+    let mut graph = n2graph::Graph::default();
+    let mut default = vec![];
+
+    log::debug!("input: {:#?}", input);
+
+    let gen_generate_test_driver_command =
+        gen_generate_test_driver_command(&mut graph, input, moonc_opt, moonbuild_opt);
+    graph.add_build(gen_generate_test_driver_command)?;
+
+    for item in input.build_items.iter() {
+        let build = gen_runtest_build_command(&mut graph, item, moonc_opt);
+        graph.add_build(build)?;
+    }
+    for item in input.link_items.iter() {
+        let (build, fid) = gen_runtest_link_command(&mut graph, item, moonc_opt);
+        default.push(fid);
+        graph.add_build(build)?;
+    }
+
+    if default.is_empty() {
+        eprintln!("{}: no test entry found", "Warning".yellow().bold());
+        std::process::exit(0);
+    }
+
+    let mut hashes = n2graph::Hashes::default();
+    let db = n2::db::open(
+        &moonbuild_opt.target_dir.join("build.moon_db"),
+        &mut graph,
+        &mut hashes,
+    )?;
+
+    Ok(State {
+        graph,
+        db,
+        hashes,
+        default,
+        pools: SmallMap::default(),
+    })
+}
+
+fn gen_generate_test_driver_command(
+    graph: &mut n2graph::Graph,
+    n2_run_test_input: &N2RuntestInput,
+    moonc_opt: &MooncOpt,
+    moonbuild_opt: &MoonbuildOpt,
+) -> Build {
+    let (driver_files, files_contain_test_block) = (
+        &n2_run_test_input.driver_files,
+        &n2_run_test_input.files_contain_test_block,
+    );
+
+    let ins = BuildIns {
+        ids: files_contain_test_block
+            .iter()
+            .map(|f| graph.files.id_from_canonical(f.display().to_string()))
+            .collect(),
+        explicit: files_contain_test_block.len(),
+        implicit: 0,
+        order_only: 0,
+    };
+    let outs = BuildOuts {
+        explicit: driver_files.len(),
+        ids: driver_files
+            .iter()
+            .map(|f| graph.files.id_from_canonical(f.display().to_string()))
+            .collect(),
+    };
+
+    let loc = FileLoc {
+        filename: Rc::new(PathBuf::from("build")),
+        line: 0,
+    };
+
+    let mut build = Build::new(loc, ins, outs);
+
+    let test_filter_command = moonbuild_opt
+        .test_opt
+        .as_ref()
+        .map_or(vec![], |t| t.to_command());
+    let command = CommandBuilder::new(
+        &std::env::current_exe()
+            .map_or_else(|_| "moon".into(), |x| x.to_string_lossy().into_owned()),
+    )
+    .arg("generate-test-driver")
+    .arg("--source-dir")
+    .arg(&moonbuild_opt.source_dir.display().to_string())
+    .arg("--target-dir")
+    .arg(&moonbuild_opt.target_dir.display().to_string())
+    .args_with_cond(!test_filter_command.is_empty(), &test_filter_command)
+    .arg_with_cond(moonbuild_opt.sort_input, "--sort-input")
+    .args(["--target", moonc_opt.build_opt.target_backend.to_flag()])
+    .build();
+
+    build.cmdline = Some(command);
+    build
+}
diff --git a/crates/moonbuild/src/gen/mod.rs b/crates/moonbuild/src/gen/mod.rs
new file mode 100644
index 00000000..f20b532d
--- /dev/null
+++ b/crates/moonbuild/src/gen/mod.rs
@@ -0,0 +1,46 @@
+pub mod cmd_builder;
+pub mod gen_build;
+pub mod gen_bundle;
+pub mod gen_check;
+pub mod gen_runtest;
+pub mod util;
+
+// WORKAROUND for do not test coverage on coverage library itself
+const MOON_CORE_COVERAGE_LIB: &str = "moonbitlang/core/coverage";
+const MOON_CORE_BUILTIN_LIB: &str = "moonbitlang/core/builtin";
+
+#[test]
+fn test_start_with() {
+    use moonutil::common::MOONBITLANG_CORE;
+    assert!(MOON_CORE_COVERAGE_LIB.starts_with(MOONBITLANG_CORE));
+    assert!(MOON_CORE_BUILTIN_LIB.starts_with(MOONBITLANG_CORE));
+}
+
+static SKIP_COVERAGE_LIBS: &[&str] = &[];
+static SELF_COVERAGE_LIBS: &[&str] = &[MOON_CORE_BUILTIN_LIB, MOON_CORE_COVERAGE_LIB];
+
+fn is_skip_coverage_lib(name: &str) -> bool {
+    SKIP_COVERAGE_LIBS.contains(&name)
+}
+
+fn is_self_coverage_lib(name: &str) -> bool {
+    SELF_COVERAGE_LIBS.contains(&name)
+}
+
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct MiAlias {
+    pub name: String,
+    pub alias: String,
+}
+
+impl PartialOrd for MiAlias {
+    fn partial_cmp(&self, other: &Self) -> Option<std::cmp::Ordering> {
+        Some(self.name.cmp(&other.name))
+    }
+}
+
+impl Ord for MiAlias {
+    fn cmp(&self, other: &Self) -> std::cmp::Ordering {
+        self.name.cmp(&other.name)
+    }
+}
diff --git a/crates/moonbuild/src/gen/util.rs b/crates/moonbuild/src/gen/util.rs
new file mode 100644
index 00000000..3863fd69
--- /dev/null
+++ b/crates/moonbuild/src/gen/util.rs
@@ -0,0 +1,92 @@
+use anyhow::bail;
+use moonutil::graph::get_example_cycle;
+use moonutil::module::ModuleDB;
+use moonutil::package::Package;
+#[allow(unused)]
+use std::collections::HashSet;
+
+use petgraph::dot::{Config, Dot};
+
+pub fn toposort(m: &ModuleDB) -> anyhow::Result<Vec<String>> {
+    let topo = match petgraph::algo::toposort(&m.graph, None) {
+        Ok(nodes) => {
+            let nodes_rev = nodes.iter().rev().map(|x| x.index()).collect::<Vec<_>>();
+
+            super::util::nodes_to_names(m, &nodes_rev)
+        }
+        Err(cycle) => {
+            let cycle = get_example_cycle(&m.graph, cycle.node_id());
+            let cycle = cycle
+                .into_iter()
+                .map(|n| m.packages[n.index()].full_name())
+                .collect::<Vec<_>>();
+            bail!("cyclic dependency detected: {:?}", cycle);
+        }
+    };
+    Ok(topo)
+}
+
+pub fn topo_from_node(m: &ModuleDB, pkg: &Package) -> anyhow::Result<Vec<String>> {
+    let pkg_full_name = pkg.full_name();
+    let mut stk: Vec<String> = Vec::new();
+    let mut visited: HashSet<String> = HashSet::new();
+
+    fn dfs(
+        m: &ModuleDB,
+        pkg_full_name: &String,
+        stk: &mut Vec<String>,
+        visited: &mut HashSet<String>,
+    ) -> anyhow::Result<()> {
+        visited.insert(pkg_full_name.clone());
+
+        for neighbor in m.packages[pkg_full_name].imports.iter() {
+            let neighbor_full_name = neighbor.path.make_full_path();
+            if !visited.contains(&neighbor_full_name) {
+                dfs(m, &neighbor_full_name, stk, visited)?;
+            }
+        }
+
+        stk.push(pkg_full_name.clone());
+        Ok(())
+    }
+
+    dfs(m, &pkg_full_name, &mut stk, &mut visited)?;
+    Ok(stk)
+}
+
+pub fn nodes_to_names(m: &ModuleDB, nodes: &[usize]) -> Vec<String> {
+    nodes
+        .iter()
+        .map(|index| m.packages[*index].full_name())
+        .collect::<Vec<_>>()
+}
+
+pub fn nodes_to_cores(m: &ModuleDB, nodes: &[String]) -> Vec<String> {
+    nodes
+        .iter()
+        .map(|index| m.packages[index].artifact.with_extension("core"))
+        .map(|p| p.display().to_string())
+        .collect::<Vec<_>>()
+}
+
+pub fn nodes_to_pkg_sources(m: &ModuleDB, nodes: &[String]) -> Vec<(String, String)> {
+    nodes
+        .iter()
+        .map(|index| {
+            let pkg = &m.packages[index];
+            let package_source_dir: String = if pkg.rel.components.is_empty() {
+                m.source_dir.display().to_string()
+            } else {
+                m.source_dir
+                    .join(pkg.rel.fs_full_name())
+                    .display()
+                    .to_string()
+            };
+            (pkg.full_name(), package_source_dir)
+        })
+        .collect::<Vec<_>>()
+}
+
+pub fn graph_to_dot(m: &ModuleDB) {
+    println!("{:?}", Dot::with_config(&m.graph, &[Config::EdgeNoLabel]));
+}
diff --git a/crates/moonbuild/src/lib.rs b/crates/moonbuild/src/lib.rs
new file mode 100644
index 00000000..ebd219d1
--- /dev/null
+++ b/crates/moonbuild/src/lib.rs
@@ -0,0 +1,59 @@
+use std::io::Write;
+
+pub mod bench;
+pub mod build;
+pub mod bundle;
+pub mod check;
+pub mod doc_http;
+pub mod dry_run;
+pub mod entry;
+pub mod expect;
+pub mod fmt;
+pub mod gen;
+pub mod new;
+pub mod runtest;
+pub mod section_capture;
+pub mod upgrade;
+
+use sysinfo::{ProcessExt, System, SystemExt};
+
+pub const MOON_PID_NAME: &str = ".moon.pid";
+
+pub fn bail_moon_check_is_running(p: &std::path::Path) -> anyhow::Result<i32> {
+    anyhow::bail!(
+        "`moon check` is already running. If you are certain it is not running, you may want to manually delete `{}` and try again.",
+        p.to_str().unwrap_or(MOON_PID_NAME)
+    )
+}
+
+pub fn write_current_pid(
+    target_dir: &std::path::Path,
+    pid_path: &std::path::Path,
+) -> anyhow::Result<()> {
+    std::fs::create_dir_all(target_dir)?;
+    let pid = std::process::id();
+    let mut pid_file = std::fs::File::create(pid_path)?;
+    pid_file.write_all(pid.to_string().as_bytes())?;
+    Ok(())
+}
+
+pub fn watcher_is_running(pid_path: &std::path::Path) -> anyhow::Result<bool> {
+    if !pid_path.exists() {
+        return Ok(false);
+    }
+
+    let pid = std::fs::read_to_string(pid_path)?;
+    let pid = pid.parse::<usize>()?;
+    let pid = sysinfo::Pid::from(pid);
+    let mut sys = System::new();
+    sys.refresh_processes();
+    if let Some(p) = sys.process(pid) {
+        if p.name() == "moon" {
+            Ok(true)
+        } else {
+            Ok(false)
+        }
+    } else {
+        Ok(false)
+    }
+}
diff --git a/crates/moonbuild/src/new.rs b/crates/moonbuild/src/new.rs
new file mode 100644
index 00000000..2a46e4d2
--- /dev/null
+++ b/crates/moonbuild/src/new.rs
@@ -0,0 +1,219 @@
+use std::io::Write;
+use std::path::Path;
+
+use anyhow::Context;
+use colored::Colorize;
+
+use moonutil::common::MOON_PKG_JSON;
+use moonutil::module::MoonModJSON;
+use moonutil::package::MoonPkgJSON;
+use moonutil::package::PkgJSONImportItem;
+
+use moonutil::common::MOON_MOD_JSON;
+
+pub fn create_or_warning(path: &Path) -> anyhow::Result<()> {
+    if path.exists() {
+        eprintln!(
+            "{} {}",
+            "Warning:".bold().yellow(),
+            format_args!("{} already exists", path.display())
+        );
+    } else {
+        std::fs::create_dir_all(path).context(format!("failed to create {}", path.display()))?;
+    }
+    Ok(())
+}
+
+pub fn moon_new_exec(
+    target_dir: &Path,
+    user: String,
+    name: String,
+    license: Option<&str>,
+) -> anyhow::Result<i32> {
+    let cake_full_name = format!("{}/{}", user, name);
+    common(target_dir, &cake_full_name, license)?;
+
+    let main_dir = target_dir.join("main");
+    create_or_warning(&main_dir)?;
+    // main/${MOON_PKG}
+    {
+        let main_moon_pkg = main_dir.join(MOON_PKG_JSON);
+        let j = MoonPkgJSON {
+            name: None,
+            is_main: Some(true),
+            import: Some(moonutil::package::PkgJSONImport::List(vec![
+                PkgJSONImportItem::String(format!("{}/lib", cake_full_name)),
+            ])),
+            wbtest_import: None,
+            test_import: None,
+            link: None,
+            warn_list: None,
+            alert_list: None,
+        };
+        moonutil::common::write_package_json_to_file(&j, &main_moon_pkg)?;
+    }
+    // main/main.mbt
+    {
+        let main_moon = main_dir.join("main.mbt");
+        let content = r#"fn main {
+  println(@lib.hello())
+}
+"#;
+        let mut file = std::fs::File::create(main_moon).unwrap();
+        file.write_all(content.as_bytes()).unwrap();
+    }
+
+    // LICENSE
+    {
+        if let Some("Apache-2.0") = license {
+            let license_file = target_dir.join("LICENSE");
+            let content = include_str!(concat!(
+                env!("CARGO_MANIFEST_DIR"),
+                "/../moonbuild/template/apache-2.0.txt"
+            ));
+            let mut file = std::fs::File::create(license_file).unwrap();
+            file.write_all(content.as_bytes()).unwrap();
+        }
+    }
+
+    println!("{} {}", "Created".bold().green(), target_dir.display());
+
+    Ok(0)
+}
+
+pub fn moon_new_lib(
+    target_dir: &Path,
+    user: String,
+    name: String,
+    license: Option<&str>,
+) -> anyhow::Result<i32> {
+    let cake_full_name = format!("{}/{}", user, name);
+    common(target_dir, &cake_full_name, license)?;
+
+    // top.mbt
+    {
+        let top_mbt = target_dir.join("top.mbt");
+        let content = r#"pub fn greeting() -> Unit {
+  println(@lib.hello())
+}
+"#;
+        let mut file = std::fs::File::create(top_mbt).unwrap();
+        file.write_all(content.as_bytes()).unwrap();
+    }
+
+    // moon.pkg.json
+    {
+        let moon_pkg_json = target_dir.join("moon.pkg.json");
+        let content = format!(
+            r#"{{
+  "import": [
+    "{}/lib"
+  ]
+}}
+"#,
+            cake_full_name
+        );
+        let mut file = std::fs::File::create(moon_pkg_json).unwrap();
+        file.write_all(content.as_bytes()).unwrap();
+    }
+
+    println!("{} {}", "Created".bold().green(), target_dir.display());
+
+    Ok(0)
+}
+
+fn common(target_dir: &Path, cake_full_name: &str, license: Option<&str>) -> anyhow::Result<i32> {
+    std::fs::create_dir_all(target_dir).context("failed to create target directory")?;
+    let git_init = std::process::Command::new("git")
+        .arg("init")
+        .current_dir(target_dir)
+        .status();
+    match git_init {
+        Ok(status) if status.success() => {}
+        _ => {
+            eprintln!(
+                "{}: git init failed, make sure you have git in PATH",
+                "Warning".yellow().bold()
+            );
+        }
+    }
+
+    {
+        let m: MoonModJSON = MoonModJSON {
+            name: cake_full_name.into(),
+            version: Some("0.1.0".parse().unwrap()),
+            deps: None,
+            readme: Some("README.md".into()),
+            repository: Some("".into()),
+            license: license
+                .map(|s| s.to_string())
+                .or_else(|| Some(String::from(""))),
+            keywords: Some(vec![]),
+            description: Some("".into()),
+
+            compile_flags: None,
+            link_flags: None,
+            checksum: None,
+            ext: Default::default(),
+        };
+        moonutil::common::write_module_json_to_file(&m, target_dir)
+            .context(format!("failed to write `{}`", MOON_MOD_JSON))?;
+    }
+    // .gitignore
+    {
+        let gitignore = target_dir.join(".gitignore");
+        let content = "target/\n.mooncakes/\n";
+        let mut file = std::fs::File::create(gitignore).unwrap();
+        file.write_all(content.as_bytes()).unwrap();
+    }
+    let lib_dir = target_dir.join("lib");
+    create_or_warning(&lib_dir)?;
+    // lib/hello.mbt
+    {
+        let hello_mbt = lib_dir.join("hello.mbt");
+        let content = r#"pub fn hello() -> String {
+  "Hello, world!"
+}
+"#;
+        let mut file = std::fs::File::create(hello_mbt).unwrap();
+        file.write_all(content.as_bytes()).unwrap();
+    }
+    // lib/hello_wbtest.mbt
+    {
+        let hello_mbt = lib_dir.join("hello_wbtest.mbt");
+        let content = r#"test "hello" {
+  if hello() != "Hello, world!" {
+    raise "hello() != \"Hello, world!\""
+  }
+}
+"#;
+
+        let mut file = std::fs::File::create(hello_mbt).unwrap();
+        file.write_all(content.as_bytes()).unwrap();
+    }
+    // lib/moon.pkg.json
+    {
+        let lib_moon_pkg = lib_dir.join(MOON_PKG_JSON);
+        let j = MoonPkgJSON {
+            name: None,
+            is_main: None,
+            import: None,
+            wbtest_import: None,
+            test_import: None,
+            link: None,
+            warn_list: None,
+            alert_list: None,
+        };
+        moonutil::common::write_package_json_to_file(&j, &lib_moon_pkg)?;
+    }
+
+    // READMD.md
+    {
+        let md_file = target_dir.join("README.md");
+        let content = format!("# {}", cake_full_name);
+        let mut file = std::fs::File::create(md_file).unwrap();
+        file.write_all(content.as_bytes()).unwrap();
+    }
+
+    Ok(0)
+}
diff --git a/crates/moonbuild/src/runtest.rs b/crates/moonbuild/src/runtest.rs
new file mode 100644
index 00000000..b35360ab
--- /dev/null
+++ b/crates/moonbuild/src/runtest.rs
@@ -0,0 +1,87 @@
+use crate::section_capture::{handle_stdout, SectionCapture};
+
+use super::gen;
+use anyhow::{bail, Context};
+use moonutil::common::{
+    MoonbuildOpt, MooncOpt, MOON_COVERAGE_DELIMITER_BEGIN, MOON_COVERAGE_DELIMITER_END,
+    MOON_TEST_DELIMITER_BEGIN, MOON_TEST_DELIMITER_END,
+};
+use moonutil::module::ModuleDB;
+use n2::load::State;
+use serde::{Deserialize, Serialize};
+use std::process::Command;
+use std::{path::Path, process::Stdio};
+
+pub fn load_moon_proj(
+    module: &ModuleDB,
+    moonc_opt: &MooncOpt,
+    moonbuild_opt: &MoonbuildOpt,
+) -> anyhow::Result<State> {
+    // let module = module.clone();
+    let n2_input = gen::gen_runtest::gen_runtest(module, moonc_opt, moonbuild_opt)?;
+    log::debug!("n2_input: {:#?}", n2_input);
+    gen::gen_runtest::gen_n2_runtest_state(&n2_input, moonc_opt, moonbuild_opt)
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct TestStatistics {
+    pub passed: u32,
+    pub package: String,
+    pub filenames: Vec<String>,
+    pub messages: Vec<String>,
+    pub test_names: Vec<String>,
+}
+
+pub fn run_wat(path: &Path, target_dir: &Path) -> anyhow::Result<TestStatistics> {
+    run("moonrun", path, target_dir)
+}
+
+pub fn run_js(path: &Path, target_dir: &Path) -> anyhow::Result<TestStatistics> {
+    run("node", path, target_dir)
+}
+
+fn run(command: &str, path: &Path, target_dir: &Path) -> anyhow::Result<TestStatistics> {
+    let mut execution = Command::new(command)
+        .arg(path)
+        .stdin(Stdio::null())
+        .stdout(Stdio::piped())
+        .stderr(Stdio::inherit())
+        .spawn()
+        .with_context(|| format!("failed to execute '{} {}'", command, path.display()))?;
+    let stdout = execution.stdout.take().unwrap();
+
+    let mut test_capture =
+        SectionCapture::new(MOON_TEST_DELIMITER_BEGIN, MOON_TEST_DELIMITER_END, false);
+    let mut coverage_capture = SectionCapture::new(
+        MOON_COVERAGE_DELIMITER_BEGIN,
+        MOON_COVERAGE_DELIMITER_END,
+        true,
+    );
+
+    handle_stdout(
+        &mut std::io::BufReader::new(stdout),
+        &mut [&mut test_capture, &mut coverage_capture],
+        |line| print!("{}", line),
+    )?;
+    let output = execution.wait()?;
+
+    if output.success() {
+        if let Some(coverage_output) = coverage_capture.finish() {
+            // Output to moonbit_coverage_<time>.txt
+            // TODO: do we need to move this out of the runtest module?
+            let time = chrono::Local::now().timestamp_micros();
+            let filename = target_dir.join(format!("moonbit_coverage_{}.txt", time));
+            std::fs::write(&filename, coverage_output)
+                .context(format!("failed to write {}", filename.to_string_lossy()))?;
+        }
+        if let Some(test_output) = test_capture.finish() {
+            let j: TestStatistics = serde_json_lenient::from_str(test_output.trim())
+                .context(format!("failed to parse test summary: {}", test_output))?;
+            Ok(j)
+        } else {
+            bail!("No test output found");
+        }
+    } else {
+        bail!("Failed to run the test");
+    }
+}
diff --git a/crates/moonbuild/src/section_capture.rs b/crates/moonbuild/src/section_capture.rs
new file mode 100644
index 00000000..02fc07e5
--- /dev/null
+++ b/crates/moonbuild/src/section_capture.rs
@@ -0,0 +1,164 @@
+use std::io::BufRead;
+
+pub struct SectionCapture<'a> {
+    begin_delimiter: &'a str,
+    end_delimiter: &'a str,
+    capture_buffer: String,
+    include_delimiters: bool,
+    found_begin: bool,
+    found_end: bool,
+}
+
+pub enum LineCaptured {
+    All,
+    Prefix(usize), // noncaptured start index
+    Suffix(usize), // noncaptured end index
+}
+
+impl<'a> SectionCapture<'a> {
+    pub fn new(begin_delimiter: &'a str, end_delimiter: &'a str, include_delimiters: bool) -> Self {
+        SectionCapture {
+            begin_delimiter,
+            end_delimiter,
+            capture_buffer: String::new(),
+            include_delimiters,
+            found_begin: false,
+            found_end: false,
+        }
+    }
+
+    /// Feed a line into the capture buffer. The line should contain the newline character.
+    pub fn feed_line(&mut self, line: &str) -> Option<LineCaptured> {
+        if line.trim_end().ends_with(self.begin_delimiter) {
+            self.found_begin = true;
+            self.found_end = false;
+            if self.include_delimiters {
+                self.capture_buffer.push_str(line);
+            }
+            let end_index = line.trim_end().len() - self.begin_delimiter.len();
+            return Some(LineCaptured::Suffix(end_index));
+        }
+        if self.found_begin && line.starts_with(self.end_delimiter) {
+            self.found_end = true;
+            if self.include_delimiters {
+                self.capture_buffer.push_str(line);
+            }
+            let start_index = self.end_delimiter.len();
+            if line.trim().len() == self.end_delimiter.len() {
+                // The whole line is just the end delimiter.
+                return Some(LineCaptured::All);
+            } else {
+                return Some(LineCaptured::Prefix(start_index));
+            }
+        }
+        if self.found_begin && !self.found_end {
+            self.capture_buffer.push_str(line);
+            return Some(LineCaptured::All);
+        }
+        None
+    }
+
+    /// Returns the captured section if the section is complete.
+    pub fn finish(self) -> Option<String> {
+        if self.found_begin && self.found_end {
+            Some(self.capture_buffer)
+        } else {
+            None
+        }
+    }
+}
+
+/// Pipes the child stdout to stdout, with the ability to capture sections of the output.
+/// If any of the captures captures a line, the line will not be printed to stdout.
+/// The captures are processed in order: a line is captured by the first capture that captures it.
+/// The program should not print overlapping sections, as the captures are not aware of each other.
+pub fn handle_stdout<P: FnMut(&str)>(
+    stdout: &mut impl BufRead,
+    captures: &mut [&mut SectionCapture],
+    mut print: P,
+) -> anyhow::Result<()> {
+    let mut buf = String::new();
+
+    loop {
+        buf.clear();
+        let n = stdout.read_line(&mut buf)?;
+        if n == 0 {
+            break;
+        }
+        let capture_status = captures
+            .iter_mut()
+            .find_map(|capture| capture.feed_line(&buf));
+        match capture_status {
+            None => print(&buf),
+            Some(LineCaptured::All) => {}
+            Some(LineCaptured::Prefix(start_index)) => print(&buf[start_index..]),
+            Some(LineCaptured::Suffix(end_index)) => print(&buf[..end_index]),
+        }
+    }
+    Ok(())
+}
+
+#[test]
+fn test_handle_output() {
+    let out = "abcde
+---begin---
+text
+---end---
+fghij";
+    let expected_out = "abcde
+fghij";
+    let mut capture = SectionCapture::new("---begin---", "---end---", false);
+    let mut buf = String::new();
+    let mut captures = [&mut capture];
+    handle_stdout(
+        &mut std::io::BufReader::new(out.as_bytes()),
+        &mut captures,
+        |line| buf.push_str(line),
+    )
+    .unwrap();
+    assert_eq!(buf, expected_out);
+    assert_eq!(capture.finish().unwrap(), "text\n");
+}
+
+#[test]
+fn test_handle_intermixed_output() {
+    let out = "abcde
+blahblah---begin---
+text
+---end---blahblah
+fghij";
+    let expected_out = "abcde
+blahblahblahblah
+fghij";
+    let mut capture = SectionCapture::new("---begin---", "---end---", false);
+    let mut buf = String::new();
+    let mut captures = [&mut capture];
+    handle_stdout(
+        &mut std::io::BufReader::new(out.as_bytes()),
+        &mut captures,
+        |line| buf.push_str(line),
+    )
+    .unwrap();
+    assert_eq!(buf, expected_out);
+    assert_eq!(capture.finish().unwrap(), "text\n");
+}
+#[test]
+fn test_handle_wrong_output() {
+    let out = "abcde
+blahblah---begin--
+text
+---end---blahblah
+fghij";
+
+    let mut capture = SectionCapture::new("---begin---", "---end---", false);
+    let mut buf = String::new();
+    let mut captures = [&mut capture];
+    handle_stdout(
+        &mut std::io::BufReader::new(out.as_bytes()),
+        &mut captures,
+        |line| buf.push_str(line),
+    )
+    .unwrap();
+    assert_eq!(buf, out);
+    assert!(capture.finish().is_none());
+}
diff --git a/crates/moonbuild/src/upgrade.rs b/crates/moonbuild/src/upgrade.rs
new file mode 100644
index 00000000..de43294f
--- /dev/null
+++ b/crates/moonbuild/src/upgrade.rs
@@ -0,0 +1,346 @@
+use anyhow::{bail, Context, Result};
+use colored::Colorize;
+use console::Term;
+use dialoguer::Confirm;
+use futures::stream::{self, StreamExt, TryStreamExt};
+use moonutil::common::{CargoPathExt, MOONBITLANG_CORE};
+use moonutil::moon_dir;
+use reqwest;
+use std::io::Write;
+use std::path::{Component, Path, PathBuf};
+use std::sync::{Arc, Mutex};
+use std::time::Duration;
+use tokio;
+use tokio::io::AsyncWriteExt;
+use tokio::signal;
+
+#[cfg(unix)]
+use std::os::unix::fs::PermissionsExt;
+
+#[cfg(unix)]
+use tokio::fs::set_permissions;
+
+#[derive(Default)]
+struct DownloadProgress {
+    total_size: u64,
+    downloaded: u64,
+}
+
+/// Copy from: https://github.com/rust-lang/cargo/blob/c21dd51/crates/cargo-util/src/paths.rs#L84
+///
+/// Normalize a path, removing things like `.` and `..`.
+///
+/// CAUTION: This does not resolve symlinks (unlike
+/// [`std::fs::canonicalize`]). This may cause incorrect or surprising
+/// behavior at times. This should be used carefully. Unfortunately,
+/// [`std::fs::canonicalize`] can be hard to use correctly, since it can often
+/// fail, or on Windows returns annoying device paths. This is a problem Cargo
+/// needs to improve on.
+pub fn normalize_path(path: &Path) -> PathBuf {
+    let mut components = path.components().peekable();
+    let mut ret = if let Some(c @ Component::Prefix(..)) = components.peek().cloned() {
+        components.next();
+        PathBuf::from(c.as_os_str())
+    } else {
+        PathBuf::new()
+    };
+
+    for component in components {
+        match component {
+            Component::Prefix(..) => unreachable!(),
+            Component::RootDir => {
+                ret.push(component.as_os_str());
+            }
+            Component::CurDir => {}
+            Component::ParentDir => {
+                ret.pop();
+            }
+            Component::Normal(c) => {
+                ret.push(c);
+            }
+        }
+    }
+    ret
+}
+
+fn check_connectivity() -> anyhow::Result<&'static str> {
+    let url = "https://www.google.com";
+
+    let client = reqwest::blocking::Client::builder()
+        .timeout(Duration::from_secs(1))
+        .build()
+        .context("Failed to create HTTP client")?;
+
+    let resp = client.get(url).send();
+    if resp.is_ok() && resp.unwrap().status().is_success() {
+        Ok("https://cli.moonbitlang.com")
+    } else {
+        Ok("https://cli.moonbitlang.cn")
+    }
+}
+
+fn os_arch() -> &'static str {
+    match (std::env::consts::ARCH, std::env::consts::OS) {
+        ("x86_64", "macos") => "macos_intel",
+        ("aarch64", "macos") => "macos_m1",
+        ("x86_64", "linux") => "ubuntu_x86",
+        ("x86_64", "windows") => "windows",
+        _ => panic!("unsupported platform"),
+    }
+}
+
+pub fn upgrade() -> Result<i32> {
+    ctrlc::set_handler(moonutil::common::dialoguer_ctrlc_handler)?;
+
+    let h = moon_dir::home();
+
+    println!("Checking network ...");
+    let root = check_connectivity()?;
+    println!("  Use {}", root);
+
+    let download_page = if root.contains("moonbitlang.cn") {
+        "https://www.moonbitlang.cn/download"
+    } else {
+        "https://www.moonbitlang.com/download"
+    };
+
+    println!("{}", "Warning: moon upgrade is highly experimental.".bold());
+    let msg = format!(
+        "If you encounter any problems, please reinstall by visit {}",
+        download_page
+    );
+    println!("{}", msg.bold());
+    let confirm = Confirm::new()
+        .with_prompt(format!(
+            "Will install to {}. Continue?",
+            h.display().to_string().bold()
+        ))
+        .default(true)
+        .interact()?;
+    if confirm {
+        do_upgrade(root)?;
+    }
+    println!("{}", "Done".green().bold());
+    Ok(0)
+}
+
+pub fn do_upgrade(root: &'static str) -> Result<i32> {
+    let rt = tokio::runtime::Runtime::new()?;
+    rt.block_on(async {
+        #[cfg(unix)]
+        let items = [
+            "moon",
+            "moonc",
+            "moonfmt",
+            "moonrun",
+            "mooninfo",
+            "moondoc",
+            "moon_cove_report",
+            "mooncake",
+            "core.zip",];
+        #[cfg(windows)]
+        let items = [
+            "moon",
+            "moonc",
+            "moonfmt",
+            "moonrun",
+            "moondoc",
+            "moon_cove_report",
+            "mooncake",
+            "core.zip",];
+        let urls = items
+            .iter()
+            .map(|item| {
+                if *item != "core.zip" {
+                    format!("{}/{}/{}{}", root, os_arch(), item, if os_arch() == "windows" { ".exe" } else { "" })
+                } else {
+                    format!("{}/{}", root, item)
+                }
+            })
+            .collect::<Vec<String>>();
+
+        let temp_dir = tempfile::tempdir()?;
+        let temp_dir_path = temp_dir.path();
+
+        let progress_map = Arc::new(Mutex::new(indexmap::map::IndexMap::new()));
+
+        let term = Arc::new(Mutex::new(Term::stdout()));
+
+        for item in urls.iter() {
+            let mut map = progress_map.lock().unwrap();
+            map.insert(
+                item.split('/').last().unwrap(),
+                DownloadProgress {
+                    total_size: 0,
+                    downloaded: 0,
+                },
+            );
+        }
+
+        let download_futures = urls.iter().map(|url| {
+            let progress_map = progress_map.clone();
+            let term = term.clone();
+            async move {
+                let filename = url.split('/').last().unwrap();
+                let filepath = temp_dir_path.join(filename);
+                let response = reqwest::get(url).await.context(format!("failed to download {}", filename))?;
+                let total_size = response.content_length().context(format!("failed to download {}: No content length", filename))?;
+                let mut file = tokio::fs::File::create(&filepath)
+                    .await
+                    .context(format!("failed to create file {}", filepath.display()))?;
+
+                {
+                    let mut map = progress_map.lock().unwrap();
+                    map.insert(
+                        filename,
+                        DownloadProgress {
+                            total_size,
+                            downloaded: 0,
+                        },
+                    );
+                }
+
+                let mut stream = response.bytes_stream();
+                while let Some(item) = stream.next().await {
+                    let chunk = item.context(format!("error while downloading {}", filename))?;
+                    file.write_all(&chunk)
+                        .await
+                        .context(format!("error while writing to file {}", filepath.display()))?;
+
+                    {
+                        let mut map = progress_map.lock().unwrap();
+                        if let Some(progress) = map.get_mut(filename) {
+                            progress.downloaded += chunk.len() as u64;
+                        }
+                    }
+                    display_progress(&term, &progress_map);
+                }
+
+                file.flush().await.context(format!("failed to flush file {}", filepath.display()))?;
+                Ok::<(), anyhow::Error>(())
+            }
+        });
+
+        let downloads = stream::iter(download_futures)
+            .map(Ok)
+            .try_for_each_concurrent(None, |f| f);
+
+        // Listen for Ctrl+C
+        let ctrl_c_handling = signal::ctrl_c();
+
+        // Use tokio::select! to wait for either downloads completion or Ctrl+C signal
+        tokio::select! {
+            _ = ctrl_c_handling => {
+                bail!("upgrade interrupted by Ctrl+C");
+            },
+            result = downloads => {
+                result?;
+
+                println!();
+
+                // post handling
+                for url in urls {
+                    let filename = url.split('/').last().unwrap();
+                    let filepath = temp_dir_path.join(filename);
+
+                    match filepath.extension().and_then(std::ffi::OsStr::to_str) {
+                        Some("zip") => {
+                            // delete old
+                            let lib_dir = moon_dir::home().join("lib");
+                            let core_dir = lib_dir.join("core");
+                            core_dir.rm_rf();
+
+                            // unzip
+                            let data = tokio::fs::read(&filepath).await.context(format!("failed to read {}", filepath.display()))?;
+                            let cursor = std::io::Cursor::new(data);
+                            let mut zip = zip::ZipArchive::new(cursor)?;
+                            for i in 0..zip.len() {
+                                let mut file = zip.by_index(i)?;
+                                let outpath = lib_dir.join(file.mangled_name());
+
+                                if file.is_dir() {
+                                    std::fs::create_dir_all(&outpath)?;
+                                } else {
+                                    if let Some(parent) = outpath.parent() {
+                                        std::fs::create_dir_all(parent)?;
+                                    }
+                                    let mut outfile = std::fs::File::create(&outpath)?;
+                                    std::io::copy(&mut file, &mut outfile)?;
+                                }
+                            }
+
+                            // use new moon to bundle
+                            let moon = moon_dir::home().join("bin").join("moon");
+                            println!("moon version:");
+                            println!("Compiling {} ...", MOONBITLANG_CORE);
+                            let out = std::process::Command::new(&moon).args(["version"]).output()?;
+                            println!("{}", String::from_utf8_lossy(&out.stdout));
+
+                            let out = std::process::Command::new(moon).args(["bundle", "--all", "--source-dir", &core_dir.display().to_string()]).output()?;
+                            println!("{}", String::from_utf8_lossy(&out.stdout));
+                            match out.status.code() {
+                                Some(0) => {},
+                                Some(code) => bail!("failed to compile core, exit code {}", code),
+                                None => bail!("failed to bundle {}", MOONBITLANG_CORE),
+
+                            }
+                        }
+                        _ => {
+                            let dst = moon_dir::bin().join(filename);
+                            let msg = format!("failed to copy {}", dst.display());
+                            let cur_bin = std::env::current_exe().context("failed to get current executable")?;
+                            let cur_bin_norm = normalize_path(&cur_bin);
+                            let dst_norm = normalize_path(&dst);
+                            let replace_self = dst_norm == cur_bin_norm;
+                            if replace_self {
+                                self_replace::self_replace(&filepath).context(format!("failed to replace {}", cur_bin.display()))?;
+                                tokio::fs::remove_file(&filepath).await.context(format!("failed to remove {}", filepath.display()))?;
+                            } else {
+                                if dst.exists() {
+                                    tokio::fs::remove_file(&dst).await.context(format!("failed to remove {}", dst.display()))?;
+                                }
+                                tokio::fs::rename(&filepath, &dst)
+                                    .await
+                                    .with_context(|| msg)?;
+                            }
+
+                            #[cfg(unix)]
+                            {
+                                let mut perms = tokio::fs::metadata(&dst).await.context(format!("failed to get metadata of {}", dst.display()))?.permissions();
+                                perms.set_mode(0o744);
+                                set_permissions(&dst, perms)
+                                    .await
+                                    .context(format!("failed to set execute permissions for {}", filepath.display()))?;
+                            }
+                        }
+                    }
+                }
+
+                let _ = term.lock().unwrap().write_line("");
+                Ok(0)
+            },
+        }
+    })
+}
+
+fn display_progress(
+    term: &Arc<Mutex<Term>>,
+    progress_map: &Arc<Mutex<indexmap::map::IndexMap<&str, DownloadProgress>>>,
+) {
+    let map = progress_map.lock().unwrap();
+
+    let mut cur = 0.0;
+    let mut total = 0.0;
+    map.iter().for_each(|(_url, progress)| {
+        cur += progress.downloaded as f64;
+        total += progress.total_size as f64;
+    });
+
+    let msg = format!("Downloading {:.1}%", cur / total * 100.0);
+
+    {
+        let mut term = term.lock().unwrap();
+        let _ = term.clear_line();
+        let _ = term.write(msg.as_bytes());
+    }
+}
diff --git a/crates/moonbuild/template/apache-2.0.txt b/crates/moonbuild/template/apache-2.0.txt
new file mode 100644
index 00000000..d6456956
--- /dev/null
+++ b/crates/moonbuild/template/apache-2.0.txt
@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
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+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
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+      Contribution(s) alone or by combination of their Contribution(s)
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+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
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+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
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+
+      (d) If the Work includes a "NOTICE" text file as part of its
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+          notices within Derivative Works that You distribute, alongside
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+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
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+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
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+   6. Trademarks. This License does not grant permission to use the trade
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+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
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+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
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+      other commercial damages or losses), even if such Contributor
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+   9. Accepting Warranty or Additional Liability. While redistributing
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+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
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+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/crates/moonbuild/template/test_driver_template.mbt b/crates/moonbuild/template/test_driver_template.mbt
new file mode 100644
index 00000000..a7c12704
--- /dev/null
+++ b/crates/moonbuild/template/test_driver_template.mbt
@@ -0,0 +1,68 @@
+// Generated by moon test.
+
+fn catch_exception[A](body : A, on_exn : A) -> A = "%control.catch"
+
+fn check_panic[A, B, E](
+  f : () -> A!E,
+  does_panic : () -> B!E,
+  no_panic : () -> B!E
+) -> B!E {
+  catch_exception(
+    {
+      f()! |> ignore
+      no_panic()!
+    },
+    does_panic()!,
+  )
+}
+
+fn startswith_panic(s : String) -> Bool {
+  s.length() >= 5 && s[0] == 'p' && s[1] == 'a' && s[2] == 'n' && s[3] == 'i' &&
+  s[4] == 'c'
+}
+
+fn main {
+  let tests : @moonbitlang/core/builtin.Array[(String, String, () -> Unit!String)] = [
+    // test identifiers
+  ]
+  let total = tests.length()
+  let test_names = @moonbitlang/core/builtin.Array::make(total, "")
+  let filenames = @moonbitlang/core/builtin.Array::make(total, "")
+  let messages = @moonbitlang/core/builtin.Array::make(total, "")
+  let mut succ_idx = total
+  let mut fail_idx = 0
+  for k = 0; k < tests.length(); k = k + 1 {
+    let (filename, name, f) = tests[k]
+    filenames[k] = filename
+    try {
+      if startswith_panic(name) {
+        check_panic(f, fn() { () }, fn() { raise "panic is expected" })!
+      } else {
+        f()!
+      }
+      succ_idx -= 1
+      test_names[succ_idx] = name
+    } catch {
+      e => {
+        test_names[fail_idx] = name
+        messages[fail_idx] = e
+        fail_idx += 1
+      }
+    }
+  }
+  fn repr(obj : @moonbitlang/core/builtin.Array[String]) -> String {
+    let buf = @moonbitlang/core/builtin.Buffer::new(size_hint=16)
+    Show::output(obj, buf)
+    buf.to_string()
+  }
+
+  let filenames = repr(filenames)
+  let test_names = repr(test_names)
+  let messages = repr(messages)
+  let passed = total - succ_idx
+  println("{begin_moontest}")
+  println(
+    "{\"passed\": \(passed), \"package\": \"{package}\", \"filenames\": \(filenames), \"test_names\": \(test_names), \"messages\": \(messages)}",
+  )
+  println("{end_moontest}")
+}
diff --git a/crates/mooncake/Cargo.toml b/crates/mooncake/Cargo.toml
new file mode 100644
index 00000000..b2e10c68
--- /dev/null
+++ b/crates/mooncake/Cargo.toml
@@ -0,0 +1,33 @@
+[package]
+name = "mooncake"
+version = "0.1.0"
+edition.workspace = true
+rust-version.workspace = true
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+moonutil.workspace = true
+serde.workspace = true
+serde_json.workspace = true
+serde_json_lenient.workspace = true
+anyhow.workspace = true
+zip.workspace = true
+colored.workspace = true
+reqwest.workspace = true
+bytes.workspace = true
+semver.workspace = true
+tokio.workspace = true
+clap.workspace = true
+sha2.workspace = true
+log.workspace = true
+walkdir.workspace = true
+dialoguer.workspace = true
+form_urlencoded = "1.2.1"
+indexmap.workspace = true
+petgraph.workspace = true
+thiserror.workspace = true
+
+[dev-dependencies]
+expect-test.workspace = true
+test-log.workspace = true
diff --git a/crates/mooncake/src/dep_dir.rs b/crates/mooncake/src/dep_dir.rs
new file mode 100644
index 00000000..a309d0cb
--- /dev/null
+++ b/crates/mooncake/src/dep_dir.rs
@@ -0,0 +1,429 @@
+//! Utilities to handle the local package directory, `.mooncakes`.
+
+use std::{
+    collections::{HashMap, HashSet},
+    path::{Path, PathBuf},
+};
+
+use moonutil::{
+    common::{DEP_PATH, MOONBITLANG_CORE},
+    moon_dir,
+    mooncakes::{result::ResolvedEnv, DirSyncResult, ModuleSource, ModuleSourceKind},
+};
+use semver::Version;
+
+use crate::registry::RegistryList;
+
+fn dep_dir_of(source_dir: &Path) -> PathBuf {
+    source_dir.join(DEP_PATH)
+}
+
+type DepDirState = HashMap<String, HashMap<String, Option<Version>>>;
+type NewDepDirState<'a> = HashMap<String, HashMap<String, &'a ModuleSource>>;
+
+/// The dependencies directory
+///
+/// # Note about folder structures
+///
+/// A MoonBit module name contains two parts: `username` and `pkgname`. The two parts
+/// are separated by slash `/`, and the latter part can contain any number of slashes
+/// itself. However, we don't want to have an arbitrary depth of directories in our
+/// dependencies directory for ease of scanning. Instead, we replace all slashes
+/// in the `pkgname` part with plus `+` sign. For example, a package
+/// `foo/bar/baz` will be stored in the directory `foo/bar+baz`.
+pub struct DepDir {
+    path: PathBuf,
+}
+
+impl DepDir {
+    pub fn of_source(source_dir: &Path) -> Self {
+        DepDir {
+            path: dep_dir_of(source_dir),
+        }
+    }
+
+    pub fn path(&self) -> &Path {
+        &self.path
+    }
+
+    /// Returns a list of currently installed packages.
+    pub fn get_current_state(&self) -> std::io::Result<DepDirState> {
+        let it = self.path().read_dir()?;
+        let mut user_list = HashMap::new();
+        for entry in it {
+            let entry = entry?;
+            // Ignore all non-directory entries.
+            if !entry.file_type()?.is_dir() {
+                continue;
+            }
+            // These are user names. For each user name, we need to find all
+            // package names within them.
+
+            let pkgs = entry.path().read_dir()?;
+            let mut pkg_list = HashMap::new();
+            for pkg in pkgs {
+                let pkg = pkg?;
+                // Ignore all non-directory entries.
+                if !pkg.file_type()?.is_dir() {
+                    continue;
+                }
+                let pkg_name = pkg.file_name().to_string_lossy().replace('+', "/");
+                let module = moonutil::common::read_module_desc_file_in_dir(&pkg.path());
+                let version = module.map(|m| m.version).ok().flatten();
+                pkg_list.insert(pkg_name, version);
+            }
+            user_list.insert(entry.file_name().to_string_lossy().into(), pkg_list);
+        }
+
+        Ok(user_list)
+    }
+}
+
+fn pkg_list_to_dep_dir_state<'a>(
+    pkg_list: impl Iterator<Item = &'a ModuleSource>,
+) -> NewDepDirState<'a> {
+    let mut user_list = HashMap::new();
+    for pkg in pkg_list {
+        match &pkg.source {
+            ModuleSourceKind::Registry(_) => {}
+            ModuleSourceKind::Local(_) => continue,
+            ModuleSourceKind::Git(_) => continue, // TODO: git registries are resolved differently
+        }
+        let user = &pkg.name.username;
+        let pkg_name = &pkg.name.pkgname;
+        let pkg_list: &mut HashMap<String, _> = user_list.entry(user.to_owned()).or_default();
+        pkg_list.insert(pkg_name.to_owned(), pkg);
+    }
+    user_list
+}
+
+struct DepDirStateDiff<'a> {
+    add_user: HashSet<String>,
+    remove_user: HashSet<String>,
+    add_pkg: HashMap<String, HashMap<String, &'a ModuleSource>>,
+    remove_pkg: HashMap<String, HashSet<String>>,
+}
+
+fn diff_dep_dir_state<'a>(
+    current: &'a DepDirState,
+    target: &'a NewDepDirState<'a>,
+) -> DepDirStateDiff<'a> {
+    // First, we need to find out which users are added and removed.
+    let mut add_user = HashSet::new();
+    let mut remove_user = HashSet::new();
+    for user in target.keys() {
+        if !current.contains_key(user) {
+            add_user.insert(user.clone());
+        }
+    }
+    for user in current.keys() {
+        if !target.contains_key(user) {
+            remove_user.insert(user.clone());
+        }
+    }
+
+    // Then, we need to find out which packages are added and removed.
+    let mut add_pkg = HashMap::new();
+    let mut remove_pkg = HashMap::new();
+    for (user, tgt_pkgs) in target {
+        let _empty = HashMap::new(); // Empty package list, does not allocate
+        let current_pkgs = current.get(user).unwrap_or(&_empty);
+        let mut add_pkg_list = HashMap::new();
+        let mut remove_pkg_list = HashSet::new();
+        for (pkg, new_source) in tgt_pkgs {
+            match current_pkgs.get(pkg) {
+                None => {
+                    // If the package is not in the current state, it's added.
+                    add_pkg_list.insert(pkg.clone(), *new_source);
+                }
+                Some(current_version) => {
+                    if current_version.is_none()
+                        || current_version.as_ref().unwrap() != &new_source.version
+                    {
+                        // On version mismatch, we remove and re-add the package.
+                        remove_pkg_list.insert(pkg.clone());
+                        add_pkg_list.insert(pkg.clone(), *new_source);
+                    }
+                    // otherwise, the package is already installed and we don't need to do anything.
+                }
+            }
+        }
+        // Remove all packages that are not in the target list.
+        for pkg in current_pkgs.keys() {
+            if !tgt_pkgs.contains_key(pkg) {
+                remove_pkg_list.insert(pkg.clone());
+            }
+        }
+
+        if !add_pkg_list.is_empty() {
+            add_pkg.insert(user.clone(), add_pkg_list.into_iter().collect());
+        }
+        if !remove_pkg_list.is_empty() && !remove_user.contains(user) {
+            remove_pkg.insert(user.clone(), remove_pkg_list);
+        }
+    }
+
+    DepDirStateDiff {
+        add_user,
+        remove_user,
+        add_pkg,
+        remove_pkg,
+    }
+}
+
+/// Sync the dependencies directory with the target package list.
+pub fn sync_deps(
+    dep_dir: &DepDir,
+    registries: &RegistryList,
+    pkg_list: &ResolvedEnv,
+    quiet: bool,
+) -> anyhow::Result<()> {
+    // Ensure the directory exists.
+    std::fs::create_dir_all(dep_dir.path())?;
+
+    let target_dep_dir = pkg_list_to_dep_dir_state(pkg_list.all_packages());
+    let current_dep_dir = dep_dir.get_current_state()?;
+
+    let diff = diff_dep_dir_state(&current_dep_dir, &target_dep_dir);
+
+    // First, remove all packages that are no longer needed.
+    for (user, pkgs) in diff.remove_pkg {
+        for pkg in pkgs {
+            let pkg_path = dep_dir.path().join(&user).join(&pkg);
+            log::info!("Removing package {} at {}", &pkg, pkg_path.display());
+            std::fs::remove_dir_all(pkg_path)?; // TODO: use async
+        }
+    }
+    // Remove users that are no longer needed.
+    for user in diff.remove_user {
+        let user_path = dep_dir.path().join(&user);
+        log::info!("Removing user {} at {}", &user, user_path.display());
+        std::fs::remove_dir_all(user_path)?;
+    }
+
+    // Then, create all users that are needed.
+    for user in diff.add_user {
+        let user_path = dep_dir.path().join(&user);
+        log::info!("Creating user {} at {}", &user, user_path.display());
+        std::fs::create_dir_all(user_path)?;
+    }
+    // Finally, Download and install packages that are needed.
+    for (user, pkgs) in diff.add_pkg {
+        for (pkg, version) in pkgs {
+            let pkg_path = pkg_to_dir(dep_dir, &user, &pkg);
+            log::info!(
+                "Installing package {:?} at {}",
+                &version,
+                pkg_path.display()
+            );
+            let ModuleSourceKind::Registry(registry) = &version.source else {
+                unreachable!()
+            };
+            registries
+                .get_registry(registry.as_deref())
+                .expect("Registry not found")
+                .install_to(&version.name, &version.version, &pkg_path, quiet)?;
+            // TODO: parallelize this
+        }
+    }
+
+    Ok(())
+}
+
+fn pkg_to_dir(dep_dir: &DepDir, username: &str, pkgname: &str) -> PathBuf {
+    // Special case: core library locates in ~/.moon
+    if format!("{username}/{pkgname}") == MOONBITLANG_CORE {
+        return moon_dir::core();
+    }
+    let pkg_dir_name = pkgname.replace('/', "+");
+    dep_dir.path().join(username).join(pkg_dir_name)
+}
+
+/// The result of a directory sync.
+
+fn map_source_to_dir(dep_dir: &DepDir, module: &ModuleSource) -> PathBuf {
+    match &module.source {
+        ModuleSourceKind::Registry(_) => {
+            pkg_to_dir(dep_dir, &module.name.username, &module.name.pkgname)
+        }
+        ModuleSourceKind::Local(path) => path.clone(),
+        ModuleSourceKind::Git(url) => {
+            todo!("Git dependency is not yet supported. Got git url: {}", url)
+        }
+    }
+}
+
+/// Resolve the directory for each module in this build.
+///
+/// Assumes [`sync_deps`] is already called. Otherwise, modules might point to
+/// directories that don't exist yet because they are not synced yet.
+pub fn resolve_dep_dirs(dep_dir: &DepDir, pkg_list: &ResolvedEnv) -> DirSyncResult {
+    let mut res = DirSyncResult::default();
+    for (id, module) in pkg_list.all_packages_and_id() {
+        res.insert(id, map_source_to_dir(dep_dir, module));
+    }
+    res
+}
+
+#[cfg(test)]
+mod test {
+    use std::collections::{HashMap, HashSet};
+
+    use moonutil::mooncakes::{ModuleName, ModuleSource, ModuleSourceKind};
+
+    fn to_state(s: &str) -> super::DepDirState {
+        let mut state = super::DepDirState::new();
+        for line in s.lines() {
+            let line = line.trim();
+            if line.is_empty() {
+                continue;
+            }
+            let mut parts = line.split(':');
+            let user = parts.next().unwrap().to_owned();
+            let pkgs = parts.next().unwrap();
+            let mut pkg_set = HashMap::new();
+            for pkg in pkgs.split(',') {
+                let (pkg_name, version) = pkg.split_once('@').unwrap();
+                let pkg_name = pkg_name.to_owned();
+                let version = version.parse().unwrap();
+                pkg_set.insert(pkg_name, Some(version));
+            }
+            state.insert(user, pkg_set);
+        }
+        state
+    }
+
+    fn to_new_state(s: &str) -> super::NewDepDirState {
+        let state = to_state(s);
+        state
+            .into_iter()
+            .map(|(user, v)| {
+                let new_v = v
+                    .into_iter()
+                    .map(|(module, v)| {
+                        let version = v.unwrap();
+                        let res = ModuleSource {
+                            name: ModuleName {
+                                username: user.clone(),
+                                pkgname: module.clone(),
+                            },
+                            version,
+                            source: ModuleSourceKind::Registry(None),
+                        };
+                        let leaked = Box::leak(Box::new(res));
+                        (module, &*leaked)
+                    })
+                    .collect();
+                (user, new_v)
+            })
+            .collect()
+    }
+
+    fn to_add_pkg(
+        input: Vec<(&str, Vec<(&str, &str)>)>,
+    ) -> HashMap<String, HashMap<String, &'static ModuleSource>> {
+        input
+            .into_iter()
+            .map(|(user, v)| {
+                let new_v = v
+                    .into_iter()
+                    .map(|(pkg, ver)| {
+                        let version = ver.parse().unwrap();
+                        let res = ModuleSource {
+                            name: ModuleName {
+                                username: user.to_owned(),
+                                pkgname: pkg.to_owned(),
+                            },
+                            version,
+                            source: ModuleSourceKind::Registry(None),
+                        };
+                        let leaked = Box::leak(Box::new(res));
+                        (pkg.to_owned(), &*leaked)
+                    })
+                    .collect();
+                (user.to_owned(), new_v)
+            })
+            .collect()
+    }
+
+    fn to_remove_pkg(input: Vec<(&str, Vec<&str>)>) -> HashMap<String, HashSet<String>> {
+        input
+            .into_iter()
+            .map(|(user, pkgs)| {
+                let pkgs_set = pkgs.into_iter().map(|pkg| pkg.to_owned()).collect();
+                (user.to_owned(), pkgs_set)
+            })
+            .collect()
+    }
+
+    #[test]
+    fn test_diff_state() {
+        let original = to_state(
+            r#"
+            user1:pkg1@1.0.0,pkg2@2.0.0
+            user2:pkg3@3.0.0
+            "#,
+        );
+        let target = to_new_state(
+            r#"
+            user1:pkg1@1.0.0,pkg2@2.0.0,pkg4@4.0.0
+            user3:pkg5@5.0.0
+            "#,
+        );
+        let diff = super::diff_dep_dir_state(&original, &target);
+        assert_eq!(
+            diff.add_user,
+            vec!["user3"].into_iter().map(|x| x.to_owned()).collect(),
+            "add user"
+        );
+        assert_eq!(
+            diff.remove_user,
+            vec!["user2"].into_iter().map(|x| x.to_owned()).collect(),
+            "remove user"
+        );
+        assert_eq!(
+            diff.add_pkg,
+            to_add_pkg(vec![
+                ("user1", vec![("pkg4", "4.0.0"),]),
+                ("user3", vec![("pkg5", "5.0.0"),])
+            ]),
+            "add pkg"
+        );
+        assert!(diff.remove_pkg.is_empty(), "remove pkg");
+    }
+
+    #[test]
+    fn test_diff_state_2() {
+        let original = to_state(
+            r"
+        user1:foo@1.0.0,bar@1.2.0
+        user2:foo@2.0.1,bar@2.2.0
+        ",
+        );
+        let target = to_new_state(
+            r"
+        user1:foo@1.2.0,bar@1.4.0
+        user2:foo@2.2.0
+        ",
+        );
+        let diff = super::diff_dep_dir_state(&original, &target);
+        assert!(diff.add_user.is_empty(), "add user");
+        assert!(diff.remove_user.is_empty(), "remove user");
+        assert_eq!(
+            diff.add_pkg,
+            to_add_pkg(vec![
+                ("user1", vec![("foo", "1.2.0"), ("bar", "1.4.0"),]),
+                ("user2", vec![("foo", "2.2.0"),])
+            ]),
+            "add pkg"
+        );
+        assert_eq!(
+            diff.remove_pkg,
+            to_remove_pkg(vec![
+                ("user1", vec!["foo", "bar"]),
+                ("user2", vec!["foo", "bar"])
+            ]),
+            "remove pkg"
+        );
+    }
+}
diff --git a/crates/mooncake/src/lib.rs b/crates/mooncake/src/lib.rs
new file mode 100644
index 00000000..b813ed52
--- /dev/null
+++ b/crates/mooncake/src/lib.rs
@@ -0,0 +1,5 @@
+pub mod dep_dir;
+pub mod pkg;
+pub mod registry;
+pub mod resolver;
+pub mod update;
diff --git a/crates/mooncake/src/pkg/add.rs b/crates/mooncake/src/pkg/add.rs
new file mode 100644
index 00000000..91ee2637
--- /dev/null
+++ b/crates/mooncake/src/pkg/add.rs
@@ -0,0 +1,103 @@
+use colored::Colorize;
+use moonutil::dependency::DependencyInfo;
+use moonutil::module::convert_module_to_mod_json;
+use moonutil::mooncakes::{ModuleName, ModuleSource, RegistryConfig};
+use semver::Version;
+use std::path::Path;
+use std::rc::Rc;
+
+use moonutil::common::{read_module_desc_file_in_dir, write_module_json_to_file, MOONBITLANG_CORE};
+
+use crate::registry::{self, Registry, RegistryList};
+use crate::resolver::resolve_single_root_with_defaults;
+
+pub fn add_latest(
+    source_dir: &Path,
+    target_dir: &Path,
+    username: &str,
+    pkgname: &str,
+    registry_config: &RegistryConfig,
+    quiet: bool,
+) -> anyhow::Result<i32> {
+    if format!("{username}/{pkgname}") == MOONBITLANG_CORE {
+        eprintln!(
+            "{}: no need to add `{}` as dependency",
+            MOONBITLANG_CORE,
+            "Warning".yellow().bold()
+        );
+        std::process::exit(0);
+    }
+    let registry = registry::OnlineRegistry::mooncakes_io();
+    let pkg_name = ModuleName {
+        username: username.to_string(),
+        pkgname: pkgname.to_string(),
+    };
+    let latest_version = registry
+        .get_latest_version(&pkg_name)
+        .ok_or_else(|| {
+            anyhow::anyhow!(
+                "could not find the latest version of {}/{}. Please consider running `moon update` to update the index.",
+                username,
+                pkgname
+            )
+        })?
+        .version
+        .clone()
+        .unwrap();
+    add(
+        source_dir,
+        target_dir,
+        &pkg_name,
+        &latest_version,
+        registry_config,
+        quiet,
+    )
+}
+
+#[test]
+fn test_module_name() {
+    let core_name = MOONBITLANG_CORE.parse::<ModuleName>().unwrap();
+    assert_eq!(MOONBITLANG_CORE, core_name.to_string());
+}
+
+pub fn add(
+    source_dir: &Path,
+    _target_dir: &Path,
+    pkg_name: &ModuleName,
+    version: &Version,
+    _registry_config: &RegistryConfig,
+    quiet: bool,
+) -> anyhow::Result<i32> {
+    let mut m = read_module_desc_file_in_dir(source_dir)?;
+
+    if pkg_name.to_string() == MOONBITLANG_CORE {
+        eprintln!(
+            "{}: no need to add `{}` as dependency",
+            MOONBITLANG_CORE,
+            "Warning".yellow().bold()
+        );
+        std::process::exit(0);
+    }
+
+    m.deps.insert(
+        pkg_name.to_string(),
+        DependencyInfo {
+            version: moonutil::version::as_caret_version_req(version.clone()),
+            ..Default::default()
+        },
+    );
+    let ms = ModuleSource::from_local_module(&m, source_dir).expect("Malformed module manifest");
+    let registries = RegistryList::with_default_registry();
+    let m = Rc::new(m);
+    let result = resolve_single_root_with_defaults(&registries, ms, m.clone())?;
+
+    let dep_dir = crate::dep_dir::DepDir::of_source(source_dir);
+    crate::dep_dir::sync_deps(&dep_dir, &registries, &result, quiet)?;
+
+    drop(result);
+
+    let new_j = convert_module_to_mod_json(Rc::into_inner(m).unwrap());
+    write_module_json_to_file(&new_j, source_dir)?;
+
+    Ok(0)
+}
diff --git a/crates/mooncake/src/pkg/install.rs b/crates/mooncake/src/pkg/install.rs
new file mode 100644
index 00000000..e68172d8
--- /dev/null
+++ b/crates/mooncake/src/pkg/install.rs
@@ -0,0 +1,36 @@
+use crate::{dep_dir::DepDir, resolver::resolve_single_root_with_defaults};
+
+use anyhow::Context;
+use moonutil::{
+    common::read_module_desc_file_in_dir,
+    mooncakes::{result::ResolvedEnv, ModuleSource, RegistryConfig},
+};
+use std::{path::Path, rc::Rc};
+
+pub fn install(
+    source_dir: &Path,
+    _target_dir: &Path,
+    registry_config: &RegistryConfig,
+    quiet: bool,
+) -> anyhow::Result<i32> {
+    install_impl(source_dir, registry_config, quiet, false).map(|_| 0)
+}
+
+pub(crate) fn install_impl(
+    source_dir: &Path,
+    _registry_config: &RegistryConfig,
+    quiet: bool,
+    dont_sync: bool,
+) -> anyhow::Result<(ResolvedEnv, DepDir)> {
+    let m = read_module_desc_file_in_dir(source_dir)?;
+    let m = Rc::new(m);
+    let registry = crate::registry::RegistryList::with_default_registry();
+    let ms = ModuleSource::from_local_module(&m, source_dir).expect("Malformed module manifest");
+    let res = resolve_single_root_with_defaults(&registry, ms, m.clone())?;
+    let dep_dir = crate::dep_dir::DepDir::of_source(source_dir);
+    if !dont_sync {
+        crate::dep_dir::sync_deps(&dep_dir, &registry, &res, quiet)
+            .context("When installing packages")?;
+    }
+    Ok((res, dep_dir))
+}
diff --git a/crates/mooncake/src/pkg/mod.rs b/crates/mooncake/src/pkg/mod.rs
new file mode 100644
index 00000000..1a610a32
--- /dev/null
+++ b/crates/mooncake/src/pkg/mod.rs
@@ -0,0 +1,5 @@
+pub mod add;
+pub mod install;
+pub mod remove;
+pub mod sync;
+pub mod tree;
diff --git a/crates/mooncake/src/pkg/remove.rs b/crates/mooncake/src/pkg/remove.rs
new file mode 100644
index 00000000..a0f0b2d5
--- /dev/null
+++ b/crates/mooncake/src/pkg/remove.rs
@@ -0,0 +1,42 @@
+use anyhow::bail;
+use std::{path::Path, rc::Rc};
+
+use moonutil::{
+    common::{read_module_desc_file_in_dir, write_module_json_to_file},
+    module::convert_module_to_mod_json,
+    mooncakes::{ModuleSource, RegistryConfig},
+};
+
+use crate::resolver::resolve_single_root_with_defaults;
+
+pub fn remove(
+    source_dir: &Path,
+    target_dir: &Path,
+    username: &str,
+    pkgname: &str,
+    _registry_config: &RegistryConfig,
+) -> anyhow::Result<i32> {
+    let _ = target_dir;
+    let mut m = read_module_desc_file_in_dir(source_dir)?;
+    let removed = m.deps.shift_remove(&format!("{}/{}", username, pkgname));
+    if removed.is_none() {
+        bail!(
+            "the dependency `{}/{}` could not be found",
+            username,
+            pkgname,
+        )
+    }
+    let m = Rc::new(m);
+    let ms = ModuleSource::from_local_module(&m, source_dir).expect("Malformed module manifest");
+    let registry = crate::registry::RegistryList::with_default_registry();
+    let res = resolve_single_root_with_defaults(&registry, ms, m.clone())?;
+
+    let dep_dir = crate::dep_dir::DepDir::of_source(source_dir);
+    crate::dep_dir::sync_deps(&dep_dir, &registry, &res, false)?;
+
+    drop(res);
+
+    let new_j = convert_module_to_mod_json(Rc::into_inner(m).unwrap());
+    write_module_json_to_file(&new_j, source_dir)?;
+    Ok(0)
+}
diff --git a/crates/mooncake/src/pkg/sync.rs b/crates/mooncake/src/pkg/sync.rs
new file mode 100644
index 00000000..0ebbacdd
--- /dev/null
+++ b/crates/mooncake/src/pkg/sync.rs
@@ -0,0 +1,22 @@
+//! Sync dependencies with mod/pkg definition
+
+use std::path::Path;
+
+use moonutil::mooncakes::{
+    result::ResolvedEnv, sync::AutoSyncFlags, DirSyncResult, RegistryConfig,
+};
+
+use crate::dep_dir::resolve_dep_dirs;
+
+pub fn auto_sync(
+    source_dir: &Path,
+    cli: &AutoSyncFlags,
+    registry_config: &RegistryConfig,
+    quiet: bool,
+) -> anyhow::Result<(ResolvedEnv, DirSyncResult)> {
+    let (resolved_env, dep_dir) =
+        super::install::install_impl(source_dir, registry_config, quiet, cli.dont_sync())?;
+    let dir_sync_result = resolve_dep_dirs(&dep_dir, &resolved_env);
+    log::debug!("Dir sync result: {:?}", dir_sync_result);
+    Ok((resolved_env, dir_sync_result))
+}
diff --git a/crates/mooncake/src/pkg/tree.rs b/crates/mooncake/src/pkg/tree.rs
new file mode 100644
index 00000000..33783554
--- /dev/null
+++ b/crates/mooncake/src/pkg/tree.rs
@@ -0,0 +1,57 @@
+use colored::{ColoredString, Colorize};
+use std::collections::HashSet;
+use std::path::Path;
+use walkdir::WalkDir;
+
+use moonutil::common::{
+    read_module_desc_file_in_dir, read_module_from_json, DEP_PATH, MOON_MOD_JSON,
+};
+
+pub fn bold(top: &HashSet<String>, item: &str) -> ColoredString {
+    if top.contains(item) {
+        item.bold()
+    } else {
+        item.into()
+    }
+}
+
+pub fn tree(source_dir: &Path, target_dir: &Path) -> anyhow::Result<i32> {
+    let _ = target_dir;
+    let root_m = read_module_desc_file_in_dir(source_dir)?;
+    let mut top = HashSet::new();
+    for (name, dep) in root_m.deps {
+        top.insert(format!("{}@{}", name, dep.version));
+    }
+
+    let mooncakes_dir = source_dir.join(DEP_PATH);
+    if !mooncakes_dir.exists() {
+        return Ok(0);
+    }
+    let walker = WalkDir::new(mooncakes_dir).into_iter();
+    let mut t: Vec<(String, Vec<String>)> = Vec::new();
+    for entry in walker {
+        let entry = entry?;
+        if entry.file_name() == MOON_MOD_JSON {
+            log::debug!("{:?}", entry);
+            let m = read_module_from_json(entry.path())?;
+            log::debug!("{:#?}", m);
+            let mut deps = vec![];
+            for (name, dep) in m.deps.into_iter() {
+                deps.push(format!("{}@{}", name, dep.version));
+            }
+
+            let cur = match m.version {
+                Some(v) => format!("{}@{}", m.name, v),
+                None => m.name,
+            };
+            t.push((cur, deps));
+        }
+    }
+    for item in t.iter() {
+        println!("{}:", bold(&top, &item.0));
+        for dep in item.1.iter() {
+            println!("  {}", bold(&top, dep));
+        }
+    }
+    Ok(0)
+}
diff --git a/crates/mooncake/src/registry.rs b/crates/mooncake/src/registry.rs
new file mode 100644
index 00000000..6e870206
--- /dev/null
+++ b/crates/mooncake/src/registry.rs
@@ -0,0 +1,121 @@
+#[cfg(test)]
+pub mod mock;
+pub mod online;
+
+use std::{
+    collections::{BTreeMap, HashMap},
+    path::Path,
+    rc::Rc,
+};
+
+use moonutil::module::MoonMod;
+use moonutil::mooncakes::ModuleName;
+pub use online::*;
+use semver::Version;
+
+pub trait Registry {
+    /// Get all versions of a module.
+    fn all_versions_of(
+        &self,
+        name: &ModuleName,
+    ) -> anyhow::Result<Rc<BTreeMap<Version, Rc<MoonMod>>>>;
+
+    fn get_module_version(&self, name: &ModuleName, version: &Version) -> Option<Rc<MoonMod>> {
+        let all_versions = self.all_versions_of(name).ok()?;
+        all_versions.get(version).cloned()
+    }
+
+    fn get_latest_version(&self, name: &ModuleName) -> Option<Rc<MoonMod>> {
+        let all_versions = self.all_versions_of(name).ok()?;
+        all_versions.values().last().cloned()
+    }
+
+    fn install_to(
+        &self,
+        name: &ModuleName,
+        version: &Version,
+        to: &Path,
+        quiet: bool,
+    ) -> anyhow::Result<()>;
+}
+
+impl<R> Registry for &mut R
+where
+    R: Registry,
+{
+    fn all_versions_of(
+        &self,
+        name: &ModuleName,
+    ) -> anyhow::Result<Rc<BTreeMap<Version, Rc<MoonMod>>>> {
+        (**self).all_versions_of(name)
+    }
+
+    fn install_to(
+        &self,
+        name: &ModuleName,
+        version: &Version,
+        to: &Path,
+        quiet: bool,
+    ) -> anyhow::Result<()> {
+        (**self).install_to(name, version, to, quiet)
+    }
+
+    fn get_module_version(&self, name: &ModuleName, version: &Version) -> Option<Rc<MoonMod>> {
+        (**self).get_module_version(name, version)
+    }
+
+    fn get_latest_version(&self, name: &ModuleName) -> Option<Rc<MoonMod>> {
+        (**self).get_latest_version(name)
+    }
+}
+
+pub struct RegistryList {
+    default_registry: String,
+    registries: HashMap<String, Box<dyn Registry>>,
+}
+
+impl RegistryList {
+    pub fn with_default_registry() -> Self {
+        Self::with_registry(Box::new(OnlineRegistry::mooncakes_io()))
+    }
+
+    pub fn with_registry(registry: Box<dyn Registry>) -> Self {
+        let mut registries = HashMap::new();
+        let default_registry_name = "default";
+        registries.insert(default_registry_name.to_owned(), registry);
+
+        Self {
+            registries,
+            default_registry: default_registry_name.into(),
+        }
+    }
+
+    pub fn from_registries(
+        registries: impl Iterator<Item = (String, Box<dyn Registry>)>,
+        default: String,
+    ) -> Self {
+        let registries: HashMap<_, _> = registries.collect();
+        assert!(
+            registries.contains_key(&default),
+            "Registries must contain the default registry"
+        );
+        Self {
+            registries,
+            default_registry: default,
+        }
+    }
+
+    pub fn set_default_registry(&mut self, registry: String) {
+        self.default_registry = registry
+    }
+
+    pub fn add_registry(&mut self, name: String, registry: Box<dyn Registry>) {
+        self.registries.insert(name, registry);
+    }
+
+    pub fn get_registry(&self, name: Option<&str>) -> Option<&dyn Registry> {
+        self.registries
+            .get(name.unwrap_or(&self.default_registry))
+            .map(|refbox| &**refbox)
+    }
+}
diff --git a/crates/mooncake/src/registry/mock.rs b/crates/mooncake/src/registry/mock.rs
new file mode 100644
index 00000000..2f0f89fe
--- /dev/null
+++ b/crates/mooncake/src/registry/mock.rs
@@ -0,0 +1,184 @@
+//! A mock registry for testing purposes; currently only available in tests
+
+use std::{
+    collections::{BTreeMap, HashMap},
+    rc::Rc,
+};
+
+use moonutil::{dependency::DependencyInfo, module::MoonMod, mooncakes::ModuleName};
+use semver::{Version, VersionReq};
+
+use super::Registry;
+
+/// A mock registry, primarily used in tests.
+pub struct MockRegistry {
+    modules: HashMap<ModuleName, Rc<BTreeMap<Version, Rc<MoonMod>>>>,
+}
+
+impl MockRegistry {
+    pub fn new() -> Self {
+        MockRegistry {
+            modules: HashMap::new(),
+        }
+    }
+
+    pub fn parse(&mut self, input: Vec<Vec<(&str, usize)>>) {
+        for dep_item in input.iter() {
+            let (name, v) = dep_item[0];
+            let deps: Vec<(String, String)> = dep_item
+                .iter()
+                .skip(1)
+                .map(|(name, v)| (format!("t/{}", name), format!("0.1.{}", v)))
+                .collect();
+
+            for (name, version) in &deps {
+                if self.try_get_module(name, version).is_none() {
+                    self.add_module_full(name, version, vec![]); // add placeholder
+                }
+            }
+
+            self.add_module_full(
+                &format!("t/{}", name),
+                &format!("0.1.{}", v),
+                deps.iter().map(|x| (x.0.as_str(), x.1.as_str())),
+            );
+        }
+
+        let mut misses = vec![];
+
+        for module in self.modules.iter() {
+            for dep in module.1.iter().flat_map(|x| x.1.deps.iter()) {
+                if !self
+                    .modules
+                    .contains_key(&dep.0.parse::<ModuleName>().unwrap())
+                {
+                    misses.push((
+                        dep.0.clone(),
+                        format!(
+                            "{}.{}.{}",
+                            dep.1.version.comparators[0].major,
+                            dep.1.version.comparators[0].minor.unwrap(),
+                            dep.1.version.comparators[0].patch.unwrap()
+                        ),
+                    ));
+                }
+            }
+        }
+        for (missing, v) in misses.iter() {
+            self.add_module_full(missing, v, []);
+        }
+    }
+
+    pub fn get_module(&self, name: &str, version: &str) -> Rc<MoonMod> {
+        self.try_get_module(name, version).unwrap()
+    }
+
+    pub fn try_get_module(&self, name: &str, version: &str) -> Option<Rc<MoonMod>> {
+        Some(
+            self.modules
+                .get(&name.parse().unwrap())?
+                .get(&Version::parse(version).unwrap())?
+                .clone(),
+        )
+    }
+
+    /// Add a module to the mock registry. Only available when the mock registry
+    /// is not used, since modifying a [`Rc`] is only possible when it is not
+    /// shared.
+    pub fn add_module(&mut self, module: MoonMod) -> &mut Self {
+        let name = module.name.parse().unwrap();
+        let version = module.version.clone().unwrap();
+        let entry = self.modules.entry(name).or_default();
+        Rc::get_mut(entry)
+            .expect("This mock registry is already shared")
+            .insert(version, Rc::new(module));
+        self
+    }
+
+    pub fn add_module_full<'a>(
+        &mut self,
+        name: &'a str,
+        version: &'a str,
+        deps: impl IntoIterator<Item = (&'a str, &'a str)>,
+    ) -> &mut Self {
+        let module = create_mock_module(name, version, deps);
+        self.add_module(module)
+    }
+}
+
+pub fn create_mock_module<'a>(
+    name: &'a str,
+    version: &'a str,
+    deps: impl IntoIterator<Item = (&'a str, &'a str)>,
+) -> MoonMod {
+    MoonMod {
+        name: name.to_string(),
+        version: Some(Version::parse(version).unwrap()),
+        deps: deps
+            .into_iter()
+            .map(|(name, version)| {
+                (
+                    name.to_string(),
+                    DependencyInfo {
+                        version: VersionReq::parse(version).unwrap(),
+                        ..Default::default()
+                    },
+                )
+            })
+            .collect(),
+        ..Default::default()
+    }
+}
+
+impl Default for MockRegistry {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+impl Registry for MockRegistry {
+    fn all_versions_of(
+        &self,
+        name: &ModuleName,
+    ) -> anyhow::Result<std::rc::Rc<BTreeMap<Version, std::rc::Rc<MoonMod>>>> {
+        self.modules
+            .get(name)
+            .ok_or_else(|| anyhow::anyhow!("module not found in mock registry"))
+            .cloned()
+    }
+
+    fn install_to(
+        &self,
+        _name: &ModuleName,
+        _version: &Version,
+        _to: &std::path::Path,
+        _quiet: bool,
+    ) -> anyhow::Result<()> {
+        panic!("Mock registry does not support installing")
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    #[test]
+    fn test_mock_registry_add() {
+        let mut registry = MockRegistry::new();
+        registry
+            .add_module_full("foo/bar", "0.2.0", [])
+            .add_module_full("foo/bar", "0.1.0", [])
+            .add_module_full("foo/bar", "0.1.2", []);
+        let module = registry
+            .all_versions_of(&"foo/bar".parse().unwrap())
+            .unwrap();
+        assert_eq!(
+            module
+                .keys()
+                .cloned()
+                .map(|x| x.to_string())
+                .collect::<Vec<_>>(),
+            vec!["0.1.0", "0.1.2", "0.2.0"]
+        )
+    }
+}
diff --git a/crates/mooncake/src/registry/online.rs b/crates/mooncake/src/registry/online.rs
new file mode 100644
index 00000000..73501c6a
--- /dev/null
+++ b/crates/mooncake/src/registry/online.rs
@@ -0,0 +1,242 @@
+use std::{
+    cell::RefCell,
+    collections::{BTreeMap, HashMap},
+    io::BufRead,
+    path::Path,
+    rc::Rc,
+};
+
+use anyhow::bail;
+use moonutil::module::{MoonMod, MoonModJSON};
+use moonutil::mooncakes::ModuleName;
+use semver::Version;
+
+pub struct OnlineRegistry {
+    index: std::path::PathBuf,
+    url_base: String, // TODO: add download feature to registry interface
+    #[allow(clippy::type_complexity)] // Isn't it still pretty clear?
+    cache: RefCell<HashMap<ModuleName, Rc<BTreeMap<Version, Rc<MoonMod>>>>>,
+}
+
+impl OnlineRegistry {
+    pub fn mooncakes_io() -> Self {
+        OnlineRegistry {
+            index: moonutil::moon_dir::index(),
+            url_base: "https://moonbitlang-mooncakes.s3.us-west-2.amazonaws.com/user".to_string(),
+            cache: RefCell::new(HashMap::new()),
+        }
+    }
+
+    pub fn flush_cache(&mut self) {
+        self.cache.borrow_mut().clear();
+    }
+
+    fn index_file_of(&self, name: &ModuleName) -> std::path::PathBuf {
+        self.index
+            .join("user")
+            .join(&name.username)
+            .join(format!("{}.index", name.pkgname))
+    }
+}
+
+impl super::Registry for OnlineRegistry {
+    fn all_versions_of(
+        &self,
+        name: &ModuleName,
+    ) -> anyhow::Result<Rc<BTreeMap<Version, Rc<MoonMod>>>> {
+        // check cache
+        if let Some(v) = self.cache.borrow().get(name) {
+            return Ok(v.clone());
+        }
+
+        let index_file = self.index_file_of(name);
+        log::debug!("Reading versions of {} from {}", name, index_file.display());
+        let file = std::fs::File::open(index_file)?;
+        let reader = std::io::BufReader::new(file);
+
+        let lines = reader.lines();
+        let mut res = BTreeMap::new();
+        for line in lines {
+            let line = line?;
+            let module: MoonModJSON = match serde_json_lenient::from_str(&line) {
+                Ok(m) => m,
+                Err(e) => {
+                    log::warn!("Error when reading index file of {}: {}", name, e);
+                    continue;
+                }
+            };
+            let module: MoonMod = match module.try_into() {
+                Ok(m) => m,
+                Err(e) => {
+                    log::warn!("Error when reading index file of {}: {}", name, e);
+                    continue;
+                }
+            };
+            if let Some(v) = &module.version {
+                res.insert(v.clone(), Rc::new(module));
+            }
+        }
+
+        // put in cache
+        let res = Rc::new(res);
+        self.cache.borrow_mut().insert(name.clone(), res.clone());
+
+        Ok(res)
+    }
+
+    fn install_to(
+        &self,
+        name: &ModuleName,
+        version: &Version,
+        to: &Path,
+        quiet: bool,
+    ) -> anyhow::Result<()> {
+        self.install_to_impl(name, version, to, quiet)
+    }
+}
+
+pub fn calc_sha2(p: &Path) -> anyhow::Result<String> {
+    use sha2::{Digest, Sha256};
+    use std::fs::File;
+    use std::io::prelude::*;
+
+    let mut file = File::open(p)?;
+
+    let mut hasher = Sha256::new();
+    let mut buffer = [0; 1024];
+    loop {
+        let bytes_read = file.read(&mut buffer)?;
+        if bytes_read == 0 {
+            break;
+        }
+        hasher.update(&buffer[..bytes_read]);
+    }
+
+    // read hash digest and consume hasher
+    let result = hasher.finalize();
+    Ok(format!("{:x}", result))
+}
+
+impl OnlineRegistry {
+    fn read_checksum_from_index_file(
+        &self,
+        name: &ModuleName,
+        version: &Version,
+    ) -> anyhow::Result<String> {
+        let p = self.index_file_of(name);
+        let file = std::fs::File::open(&p)?;
+        let reader = std::io::BufReader::new(file);
+
+        let lines = reader.lines().collect::<std::io::Result<Vec<String>>>()?;
+        for line in lines.iter().rev() {
+            let j: MoonModJSON = serde_json_lenient::from_str(line)?;
+            if j.version.as_ref() == Some(version) {
+                if let Some(checksum) = j.checksum {
+                    return Ok(checksum);
+                } else {
+                    bail!(
+                        "No checksum found for version {} in index file {:?}",
+                        version,
+                        p
+                    );
+                }
+            }
+        }
+        bail!(
+            "No description found for version {} in index file {:?}",
+            version,
+            p,
+        );
+    }
+
+    fn download_or_using_cache(
+        &self,
+        name: &ModuleName,
+        version: &Version,
+        quiet: bool,
+    ) -> anyhow::Result<bytes::Bytes> {
+        let pkg_index = self.index_file_of(name);
+        if !pkg_index.exists() {
+            anyhow::bail!("Module {}@{} not found", name, version);
+        }
+        let cache_file = cache_of(name, version);
+        let mut checksum_ok = false;
+        if cache_file.exists() {
+            let checksum = self.read_checksum_from_index_file(name, version)?;
+            let current_checksum = calc_sha2(&cache_file);
+            if current_checksum.is_ok() && current_checksum.unwrap() == checksum {
+                checksum_ok = true;
+            }
+        }
+        if checksum_ok {
+            if !quiet {
+                println!("Using cached {}@{}", name, version);
+            }
+            let data = std::fs::read(cache_file)?;
+            return Ok(bytes::Bytes::from(data));
+        }
+        if !quiet {
+            println!("Downloading {}", name);
+        }
+        let filepath = form_urlencoded::Serializer::new(String::new())
+            .append_key_only(&format!("{}/{}/{}", name.username, name.pkgname, version))
+            .finish();
+        let url = format!("{}/{}.zip", self.url_base, filepath);
+        let data = reqwest::blocking::get(url)?.error_for_status()?.bytes()?;
+        std::fs::create_dir_all(cache_file.parent().unwrap())?;
+        std::fs::write(cache_file, &data)?;
+        Ok(data)
+    }
+
+    pub fn install_to_impl(
+        &self,
+        name: &ModuleName,
+        version: &Version,
+        pkg_install_dir: &Path,
+        quiet: bool,
+    ) -> anyhow::Result<()> {
+        // ensure dir exists and is empty
+        if !pkg_install_dir.exists() {
+            std::fs::create_dir_all(pkg_install_dir).unwrap();
+        } else {
+            std::fs::remove_dir_all(pkg_install_dir).unwrap();
+            std::fs::create_dir_all(pkg_install_dir).unwrap();
+        }
+
+        let data = self.download_or_using_cache(name, version, quiet)?;
+        let cursor = std::io::Cursor::new(data);
+        let mut zip = zip::ZipArchive::new(cursor)?;
+        for i in 0..zip.len() {
+            let mut file = zip.by_index(i)?;
+            let outpath = pkg_install_dir.join(file.mangled_name());
+
+            if file.is_dir() {
+                std::fs::create_dir_all(&outpath)?;
+            } else {
+                if let Some(parent) = outpath.parent() {
+                    std::fs::create_dir_all(parent)?;
+                }
+                let mut outfile = std::fs::File::create(&outpath)?;
+                std::io::copy(&mut file, &mut outfile)?;
+            }
+        }
+        Ok(())
+    }
+}
+
+fn cache_of(name: &ModuleName, version: &Version) -> std::path::PathBuf {
+    let cache_dir = moonutil::moon_dir::cache();
+
+    cache_dir
+        .join(&name.username)
+        .join(&name.pkgname)
+        .join(format!("{}.zip", version))
+}
+
+#[test]
+fn test_urlencode() {
+    let s = form_urlencoded::Serializer::new(String::new())
+        .append_key_only("0.1.2+3")
+        .finish();
+    assert_eq!(s, "0.1.2%2B3");
+}
diff --git a/crates/mooncake/src/resolver.rs b/crates/mooncake/src/resolver.rs
new file mode 100644
index 00000000..1ef2b231
--- /dev/null
+++ b/crates/mooncake/src/resolver.rs
@@ -0,0 +1,124 @@
+use std::{collections::HashMap, rc::Rc};
+
+use moonutil::module::MoonMod;
+use moonutil::mooncakes::{result, ModuleName, ModuleSource};
+use semver::{Version, VersionReq};
+use thiserror::Error;
+
+use crate::registry::RegistryList;
+
+pub mod env;
+pub mod mvs;
+
+pub use mvs::MvsSolver;
+
+use self::env::ResolverEnv;
+
+/// Each package's resolved dependencies.
+pub type PackageResolveResult = HashMap<ModuleName, Version>;
+
+/// Any error that may occur during dependency resolution.
+#[derive(Debug, Error)]
+pub enum ResolverError {
+    #[error("Malformed module name found in dependency {0}: {1}")]
+    MalformedModuleName(ModuleName, String),
+    #[error("Unable to find module {0}")]
+    ModuleMissing(ModuleName),
+    #[error("No version of module {0} satisfies the requirement {1}")]
+    NoSatisfiedVersion(ModuleName, VersionReq),
+    #[error("When resolving local/git dependencies, the version of module {0} did not match the required version {1}")]
+    LocalDepVersionMismatch(Box<ModuleSource>, VersionReq),
+    /// Multiple versions of a package are required, but the build system cannot handle this.
+    #[error("Multiple conflicting versions were found for module {0}: {1:?}")]
+    ConflictingVersions(ModuleName, Vec<Version>),
+    #[error("Error during resolution: {0}")]
+    Other(anyhow::Error),
+}
+
+#[derive(Debug)]
+pub struct ResolverErrors(pub Vec<ResolverError>);
+
+impl std::fmt::Display for ResolverErrors {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        for error in &self.0 {
+            writeln!(f, "{}", error)?;
+        }
+        Ok(())
+    }
+}
+
+impl std::error::Error for ResolverErrors {}
+
+/// The dependency resolver.
+pub trait Resolver {
+    /// Resolves the dependencies of a package using the given environment.
+    ///
+    /// If the dependencies cannot be resolved, this function should return `None`.
+    fn resolve(
+        &mut self,
+        env: &mut ResolverEnv,
+        root: &[(ModuleSource, Rc<MoonMod>)],
+    ) -> Option<result::ResolvedEnv>;
+}
+
+/// Goes through the resolved environment and checks for any duplicate module names.
+///
+/// Since the build system is not yet able to handle multiple versions of the same module,
+/// this function will return an error if any duplicate module names with different versions
+/// (implying incompatible versions of the same module are resolved) are found.
+fn assert_no_duplicate_module_names(result: &result::ResolvedEnv) -> Result<(), ResolverErrors> {
+    let mut module_name_versions: HashMap<_, Vec<_>> = HashMap::new();
+    for it in result.all_packages() {
+        module_name_versions
+            .entry(&it.name)
+            .or_default()
+            .push(&it.version);
+    }
+    let mut errs = vec![];
+    for (name, versions) in module_name_versions {
+        if versions.len() > 1 {
+            let err = ResolverError::ConflictingVersions(
+                name.clone(),
+                versions.iter().cloned().cloned().collect(),
+            );
+            errs.push(err);
+        }
+    }
+    if errs.is_empty() {
+        Ok(())
+    } else {
+        Err(ResolverErrors(errs))
+    }
+}
+
+pub fn resolve_with_default_env(
+    registries: &RegistryList,
+    resolver: &mut dyn Resolver,
+    root: &[(ModuleSource, Rc<MoonMod>)],
+) -> Result<result::ResolvedEnv, ResolverErrors> {
+    let mut env = env::ResolverEnv::new(registries);
+    let res = resolver.resolve(&mut env, root);
+    if env.any_errors() {
+        Err(ResolverErrors(env.into_errors()))
+    } else {
+        let res = res.expect("Resolver should not return None when no errors were found");
+        assert_no_duplicate_module_names(&res)?;
+        Ok(res)
+    }
+}
+
+pub fn resolve_with_default_env_and_resolver(
+    registries: &RegistryList,
+    root: &[(ModuleSource, Rc<MoonMod>)],
+) -> Result<result::ResolvedEnv, ResolverErrors> {
+    let mut resolver = MvsSolver;
+    resolve_with_default_env(registries, &mut resolver, root)
+}
+
+pub fn resolve_single_root_with_defaults(
+    registries: &RegistryList,
+    root_source: ModuleSource,
+    root_module: Rc<MoonMod>,
+) -> Result<result::ResolvedEnv, ResolverErrors> {
+    resolve_with_default_env_and_resolver(registries, &[(root_source, root_module)])
+}
diff --git a/crates/mooncake/src/resolver/env.rs b/crates/mooncake/src/resolver/env.rs
new file mode 100644
index 00000000..bedfeeae
--- /dev/null
+++ b/crates/mooncake/src/resolver/env.rs
@@ -0,0 +1,89 @@
+use std::{
+    collections::{BTreeMap, HashMap},
+    path::{Path, PathBuf},
+    rc::Rc,
+};
+
+use moonutil::{
+    common::read_module_desc_file_in_dir,
+    module::MoonMod,
+    mooncakes::{ModuleName, ModuleSource, ModuleSourceKind},
+};
+use semver::Version;
+
+use crate::registry::RegistryList;
+
+use super::ResolverError;
+
+pub struct ResolverEnv<'a> {
+    registries: &'a RegistryList,
+    errors: Vec<super::ResolverError>,
+    local_module_cache: HashMap<PathBuf, Rc<MoonMod>>,
+}
+
+impl<'a> ResolverEnv<'a> {
+    pub fn new(registries: &'a RegistryList) -> Self {
+        ResolverEnv {
+            registries,
+            errors: Vec::new(),
+            local_module_cache: HashMap::new(),
+        }
+    }
+
+    pub fn into_errors(self) -> Vec<super::ResolverError> {
+        self.errors
+    }
+
+    pub fn report_error(&mut self, error: super::ResolverError) {
+        self.errors.push(error);
+    }
+
+    pub fn any_errors(&self) -> bool {
+        !self.errors.is_empty()
+    }
+
+    pub fn all_versions_of(
+        &mut self,
+        name: &ModuleName,
+        registry: Option<&str>,
+    ) -> Option<Rc<BTreeMap<Version, Rc<MoonMod>>>> {
+        self.registries
+            .get_registry(registry)?
+            .all_versions_of(name)
+            .ok()
+    }
+
+    pub fn get_module_version(
+        &mut self,
+        name: &ModuleName,
+        version: &Version,
+        registry: Option<&str>,
+    ) -> Option<Rc<MoonMod>> {
+        self.registries
+            .get_registry(registry)?
+            .get_module_version(name, version)
+    }
+
+    pub fn get(&mut self, ms: &ModuleSource) -> Option<Rc<MoonMod>> {
+        match &ms.source {
+            ModuleSourceKind::Registry(reg) => {
+                self.get_module_version(&ms.name, &ms.version, reg.as_deref())
+            }
+            ModuleSourceKind::Git(_) => todo!("Resolve git module"),
+            ModuleSourceKind::Local(path) => self.resolve_local_module(path).ok(),
+        }
+    }
+
+    /// Resolve a local module from its **canonical** path.
+    pub fn resolve_local_module(&mut self, path: &Path) -> Result<Rc<MoonMod>, ResolverError> {
+        if let Some(module) = self.local_module_cache.get(path) {
+            return Ok(module.clone());
+        }
+
+        let module = read_module_desc_file_in_dir(path).map_err(ResolverError::Other)?;
+        let rc_module = Rc::new(module);
+        self.local_module_cache
+            .insert(path.to_owned(), rc_module.clone());
+        Ok(rc_module)
+    }
+}
diff --git a/crates/mooncake/src/resolver/mvs.rs b/crates/mooncake/src/resolver/mvs.rs
new file mode 100644
index 00000000..13680095
--- /dev/null
+++ b/crates/mooncake/src/resolver/mvs.rs
@@ -0,0 +1,1706 @@
+use std::{
+    collections::{BTreeSet, HashMap, HashSet},
+    path::PathBuf,
+    rc::Rc,
+};
+
+use anyhow::anyhow;
+use moonutil::{
+    dependency::DependencyInfo,
+    module::MoonMod,
+    mooncakes::{ModuleName, ModuleSource, ModuleSourceKind},
+    version::as_caret_comparator,
+};
+use semver::Version;
+
+use super::{env::ResolverEnv, Resolver, ResolverError};
+
+/// A dependency solver that follows the MVS (minimal version selection) algorithm,
+/// which is the same as that Go uses.
+/// See https://research.swtch.com/vgo-mvs for more information.
+pub struct MvsSolver;
+
+impl Resolver for MvsSolver {
+    fn resolve(
+        &mut self,
+        env: &mut ResolverEnv,
+        root: &[(ModuleSource, Rc<MoonMod>)],
+    ) -> Option<super::result::ResolvedEnv> {
+        mvs_resolve(env, root)
+    }
+}
+
+fn select_min_version_satisfying<'a>(
+    name: &ModuleName,
+    req: &DependencyInfo,
+    versions: impl Iterator<Item = &'a Version> + 'a,
+) -> Result<Version, ResolverError> {
+    // We only support caret version requirements, per mvs algorithm, so
+    // do a preliminary scan before matching.
+    for it in &req.version.comparators {
+        if it.op != semver::Op::Caret {
+            return Err(ResolverError::Other(anyhow!(
+                "Only caret version requirements are supported; got: {}",
+                req.version
+            )));
+        }
+    }
+
+    // From lowest to highest version, find the first version that satisfies the requirement.
+    for version in versions {
+        if req.version.matches(version) {
+            return Ok(version.clone());
+        }
+    }
+
+    Err(ResolverError::NoSatisfiedVersion(
+        name.clone(),
+        req.version.clone(),
+    ))
+}
+
+fn select_min_version_satisfying_in_env(
+    env: &mut ResolverEnv,
+    name: &ModuleName,
+    req: &DependencyInfo,
+) -> Result<(Version, Rc<MoonMod>), ResolverError> {
+    let all_versions = env
+        .all_versions_of(name, None) // todo: registry
+        .ok_or_else(|| ResolverError::ModuleMissing(name.clone()))?;
+
+    let min_version_satisfying = select_min_version_satisfying(name, req, all_versions.keys());
+    match min_version_satisfying {
+        Ok(version) => {
+            let module = all_versions[&version].clone();
+            Ok((version, module))
+        }
+        Err(err) => Err(err),
+    }
+}
+
+/// Checks whether resolving local dependency is allowed for the dependant package
+fn local_dep_allowed(dependant: &ModuleSource) -> bool {
+    match &dependant.source {
+        ModuleSourceKind::Registry(_) => false,
+        ModuleSourceKind::Local(_) => true,
+        ModuleSourceKind::Git(_) => true,
+    }
+}
+
+/// Checks whether resolving git dependency is allowed for the dependant package
+fn git_dep_allowed(dependant: &ModuleSource) -> bool {
+    match &dependant.source {
+        ModuleSourceKind::Registry(_) => false,
+        ModuleSourceKind::Local(_) => true,
+        ModuleSourceKind::Git(_) => true,
+    }
+}
+
+/// Returns the root path of the dependant, to be used with local dependencies.
+/// Panics if [`local_dep_allowed(dependant)`] is false.
+fn root_path_of(dependant: &ModuleSource) -> PathBuf {
+    match &dependant.source {
+        ModuleSourceKind::Registry(_) => {
+            panic!("Registry dependencies don't have a local root path!")
+        }
+        ModuleSourceKind::Local(path) => path.clone(),
+        ModuleSourceKind::Git(repo) => {
+            todo!("Resolve local downloaded path for git repo: {}", repo)
+        }
+    }
+}
+
+/// A wrapper to generate the correct ordering expected in the MVS solver.
+#[repr(transparent)]
+#[derive(PartialEq, Eq)]
+struct ModuleSourceOrdWrapper(ModuleSource);
+
+impl Ord for ModuleSourceOrdWrapper {
+    fn cmp(&self, other: &Self) -> std::cmp::Ordering {
+        let version_cmp = self.0.version.cmp(&other.0.version);
+        if !version_cmp.is_eq() {
+            return version_cmp;
+        }
+        self.0.source.cmp(&other.0.source)
+    }
+}
+
+impl PartialOrd for ModuleSourceOrdWrapper {
+    fn partial_cmp(&self, other: &Self) -> Option<std::cmp::Ordering> {
+        Some(self.0.cmp(&other.0))
+    }
+}
+
+impl From<ModuleSource> for ModuleSourceOrdWrapper {
+    fn from(value: ModuleSource) -> Self {
+        Self(value)
+    }
+}
+
+impl From<ModuleSourceOrdWrapper> for ModuleSource {
+    fn from(value: ModuleSourceOrdWrapper) -> Self {
+        value.0
+    }
+}
+
+fn warn_about_skipped_local_or_git_dep(ms: &ModuleSource) {
+    match &ms.source {
+        ModuleSourceKind::Local(_) => {
+            log::warn!(
+                "A git dependency was skipped during version resolution: {}",
+                ms
+            );
+        }
+        ModuleSourceKind::Git(_) => {
+            log::warn!(
+                "A git dependency was skipped during version selection: {}",
+                ms
+            )
+        }
+        _ => (),
+    }
+}
+
+fn mvs_resolve(
+    env: &mut ResolverEnv,
+    root: &[(ModuleSource, Rc<MoonMod>)],
+) -> Option<super::result::ResolvedEnv> {
+    // Ordered set used to ensure they are iterated in order later.
+    let mut gathered_versions = HashMap::<ModuleName, BTreeSet<ModuleSourceOrdWrapper>>::new();
+
+    // Collect all version constraints for each dependency.
+    let mut working_list = vec![];
+    let mut visited = HashSet::new();
+
+    log::debug!("Begin MVS solving");
+
+    working_list.extend_from_slice(root);
+    if log::log_enabled!(log::Level::Debug) {
+        for (source, _) in root {
+            log::debug!("MVS root item: {}", source);
+            visited.insert(source.clone());
+        }
+    }
+
+    // Do a DFS in the graph
+    while let Some((source, module)) = working_list.pop() {
+        log::debug!("-- Solving for {}", source);
+        for (name, req) in &module.deps {
+            let pkg_name = match name.parse() {
+                Ok(v) => v,
+                Err(_) => {
+                    env.report_error(ResolverError::MalformedModuleName(
+                        module.name.parse().unwrap(),
+                        name.clone(),
+                    ));
+                    continue;
+                }
+            };
+
+            let (ms, module) = match resolve_pkg(req, &source, env, &pkg_name) {
+                Ok(value) => value,
+                Err(e) => {
+                    env.report_error(e);
+                    continue;
+                }
+            };
+
+            // Add module to working list
+            if visited.insert(ms.clone()) {
+                working_list.push((ms.clone(), module));
+            }
+
+            // Add to gathered versions
+            gathered_versions
+                .entry(pkg_name)
+                .or_default()
+                .insert(ms.into());
+        }
+    }
+
+    if env.any_errors() {
+        log::warn!("Errors in MVS dependency solving, bailing out.");
+        return None;
+    }
+
+    log::debug!("Selecting minimal version for each set of compatible versions");
+
+    // Select the minimal version of each compatible version set.
+    let mut settled_versions = HashMap::<ModuleName, BTreeSet<ModuleSourceOrdWrapper>>::new();
+    for (name, versions) in gathered_versions {
+        log::debug!("-- Module {}", name);
+
+        let mut versions = versions.into_iter().map(|x| x.0);
+        let mut curr = versions.next().unwrap();
+        log::debug!("---- seen {}", curr);
+        for v in versions {
+            let caret_curr = as_caret_comparator(curr.version.clone());
+            if caret_curr.matches(&v.version) {
+                // v >= curr, as implied by btreeset
+                // Emit a warning if the skipped dep is local or git, as they are manually specified
+                warn_about_skipped_local_or_git_dep(&curr);
+                curr = v;
+            } else {
+                log::debug!("---- selected {}", curr);
+                settled_versions
+                    .entry(name.clone())
+                    .or_default()
+                    .insert(curr.into());
+                // This starts a new incompatible set.
+                curr = v;
+            }
+            log::debug!("---- seen {}", curr);
+        }
+        // There's one last version left to be inserted
+        log::debug!("---- selected {}", curr);
+        settled_versions
+            .entry(name)
+            .or_default()
+            .insert(curr.into());
+    }
+
+    log::debug!("Building result dependency graph");
+
+    // And finally, build the dependency graph
+    let mut builder = super::result::ResolvedEnv::builder();
+    let mut working_list = vec![];
+    // id is inserted on first see;
+    // may contain items still in working list instead of fully resolved
+    let mut visited = HashMap::new();
+
+    log::debug!("-- Inserting root modules");
+    // Insert ID for root modules
+    for (ms, module) in root {
+        let id = builder.add_module(ms.clone(), module.clone());
+        log::debug!("---- {} -> {:?}", ms, id);
+        working_list.push((module.clone(), ms.clone()));
+        visited.insert(ms, id);
+    }
+
+    log::debug!("-- Inserting dependencies");
+    while let Some((module, module_source)) = working_list.pop() {
+        let pkg = module_source;
+
+        let curr_id = *visited.get(&pkg).unwrap();
+
+        for (dep_name, req) in &module.deps {
+            let dep_name = dep_name.parse().unwrap();
+            // If any malformed name, it should be reported in the previous round
+
+            let dep_versions = &settled_versions[&dep_name];
+            let resolved = dep_versions
+                .iter()
+                .find(|v| req.version.matches(&v.0.version))
+                .expect("There should be at least one version available, otherwise previous steps will fail");
+            let resolved = &resolved.0;
+
+            let id = if let Some(id) = visited.get(&resolved) {
+                *id
+            } else {
+                let dep_module = env.get(resolved).unwrap();
+                let id = builder.add_module(resolved.clone(), dep_module.clone());
+                log::debug!("---- {} -> {:?}", resolved, id);
+                visited.insert(resolved, id);
+                working_list.push((dep_module, resolved.clone()));
+                id
+            };
+            log::debug!("---- {}.deps[{}] = {}", pkg, dep_name, resolved);
+
+            // Add dependency
+            builder.add_dependency(curr_id, id, &dep_name);
+        }
+    }
+
+    log::debug!("Finished MVS solving");
+
+    Some(builder.build())
+}
+
+fn resolve_pkg(
+    req: &DependencyInfo,
+    dependant: &ModuleSource,
+    env: &mut ResolverEnv,
+    pkg_name: &ModuleName,
+) -> Result<(ModuleSource, Rc<MoonMod>), ResolverError> {
+    if let Some(path) = &req.path {
+        if local_dep_allowed(dependant) {
+            // Try resolving using local dependency
+            let root = root_path_of(dependant);
+            assert!(
+                root.is_absolute(),
+                "Root path of {} is not absolute! Got: {}",
+                dependant,
+                root.display()
+            );
+            let dep_path = root.join(path);
+            let dep_path = dep_path
+                .canonicalize()
+                .map_err(|err| ResolverError::Other(err.into()))?;
+            let res = env.resolve_local_module(&dep_path)?;
+            let ms = ModuleSource {
+                name: pkg_name.clone(),
+                version: res.version.clone().expect("Expected version in module"),
+                source: ModuleSourceKind::Local(dep_path),
+            };
+            // Assert version matches
+            if let Some(v) = &res.version {
+                if !req.version.matches(v) {
+                    return Err(ResolverError::LocalDepVersionMismatch(
+                        Box::new(ms),
+                        req.version.clone(),
+                    ));
+                }
+            }
+            return Ok((ms, res));
+        }
+    }
+    if let Some(_url) = &req.git {
+        if git_dep_allowed(dependant) {
+            // TODO: Try resolving using git dependency
+        }
+    }
+    // If neither git nor local dependencies can be resolved (either because the user
+    // didn't specify it at all, or because the repo comes from a registry), we fallback
+    // to resolving from a registry.
+    let (version, module) = select_min_version_satisfying_in_env(env, pkg_name, req)?;
+    log::debug!(
+        "---- Dependency {}, required {:?}, selected {}",
+        pkg_name,
+        req,
+        version
+    );
+    let ms = ModuleSource {
+        name: pkg_name.clone(),
+        version,
+        source: ModuleSourceKind::Registry(None),
+    };
+    Ok((ms, module))
+}
+
+#[cfg(test)]
+mod test {
+    use expect_test::expect;
+    use petgraph::dot::{Config, Dot};
+    use test_log::test;
+
+    use super::*;
+    use crate::registry::mock::{create_mock_module, MockRegistry};
+    use crate::registry::RegistryList;
+    use crate::resolver::env::ResolverEnv;
+    use crate::resolver::result::{DependencyKey, ResolvedEnv};
+    use crate::resolver::ResolverErrors;
+
+    fn create_mock_registry() -> RegistryList {
+        let mut registry = MockRegistry::new();
+        registry
+            .add_module_full("dep/one", "0.1.1", [])
+            .add_module_full("dep/one", "0.1.2", [])
+            .add_module_full("dep/one", "0.1.3", [])
+            .add_module_full("dep/one", "0.2.0", [])
+            .add_module_full("dep/one", "0.2.1", []);
+        registry
+            .add_module_full("dep/two", "0.1.0", [("dep/one", "0.1.2")])
+            .add_module_full("dep/two", "0.1.1", [("dep/one", "0.1.3")])
+            .add_module_full("dep/two", "0.2.0", [("dep/one", "0.2.0")]);
+        registry
+            .add_module_full("dep/three", "0.1.0", [("dep/two", "0.1.0")])
+            .add_module_full(
+                "dep/three",
+                "0.2.0",
+                [("dep/one", "0.2.0"), ("dep/two", "0.2.0")],
+            );
+        let reg = Box::new(registry);
+        RegistryList::with_registry(reg)
+    }
+
+    #[test]
+    fn api_walkthrough() {
+        let registry = create_mock_registry();
+
+        let mut resolver = MvsSolver;
+        let module_name: ModuleName = "dep/three".parse().unwrap();
+        let version: Version = "0.1.0".parse().unwrap();
+        let root_ms = ModuleSource::from_version(module_name.clone(), version.clone());
+        let root = registry
+            .get_registry(None)
+            .unwrap()
+            .get_module_version(&module_name, &version)
+            .unwrap();
+        let roots = vec![(root_ms.clone(), root)];
+        let mut env = ResolverEnv::new(&registry);
+        let result = resolver.resolve(&mut env, &roots).expect("Resolve failed");
+
+        let id = result.id_from_mod_name(&root_ms).unwrap();
+        expect!["ModuleId(0)"].assert_eq(&format!("{:?}", &id));
+        let mt = result.mod_name_from_id(id);
+        expect!["dep/three@0.1.0"].assert_eq(&format!("{:?}", mt));
+
+        let module_info = result.module_info(id);
+        expect![[r#"
+            MoonMod {
+                name: "dep/three",
+                version: Some(
+                    Version {
+                        major: 0,
+                        minor: 1,
+                        patch: 0,
+                    },
+                ),
+                deps: {
+                    "dep/two": ^0.1.0,
+                },
+                readme: None,
+                repository: None,
+                license: None,
+                keywords: None,
+                description: None,
+                compile_flags: None,
+                link_flags: None,
+                checksum: None,
+                ext: Null,
+            }
+        "#]]
+        .assert_debug_eq(module_info);
+
+        let deps = result.deps(id).collect::<Vec<_>>();
+        expect![[r#"
+            "[ModuleId(1)]"
+        "#]]
+        .assert_debug_eq(&format!("{:?}", &deps));
+
+        let deps_keyed = result.deps_keyed(id).collect::<Vec<_>>();
+        expect![[r#"
+            "[(ModuleId(1), dep/two)]"
+        "#]]
+        .assert_debug_eq(&format!("{:?}", &deps_keyed));
+
+        let key1 = "dep/two".parse::<DependencyKey>().unwrap();
+        let key2 = "dep/three".parse::<DependencyKey>().unwrap();
+        let x1 = result.dep_with_key(id, &key1);
+        let x2 = result.dep_with_key(id, &key2);
+        expect!["(Some(ModuleId(1)), None)"].assert_eq(&format!("{:?}", (x1, x2)));
+
+        let dep_count = result.dep_count(id);
+        expect!["1"].assert_eq(&dep_count.to_string());
+
+        let all_packages = result.all_packages().collect::<Vec<_>>();
+        expect![[r#"
+            [
+                dep/three@0.1.0,
+                dep/two@0.1.0,
+                dep/one@0.1.2,
+            ]
+        "#]]
+        .assert_debug_eq(&all_packages);
+
+        let all_packages_and_id = result.all_packages_and_id().collect::<Vec<_>>();
+        expect![[r#"
+            [
+                (
+                    ModuleId(
+                        0,
+                    ),
+                    dep/three@0.1.0,
+                ),
+                (
+                    ModuleId(
+                        1,
+                    ),
+                    dep/two@0.1.0,
+                ),
+                (
+                    ModuleId(
+                        2,
+                    ),
+                    dep/one@0.1.2,
+                ),
+            ]
+        "#]]
+        .assert_debug_eq(&all_packages_and_id);
+
+        let graph = result.graph();
+        expect![[r#"
+            digraph {
+                0 [ label = "ModuleId(0)" ]
+                1 [ label = "ModuleId(1)" ]
+                2 [ label = "ModuleId(2)" ]
+                0 -> 1 [ ]
+                1 -> 2 [ ]
+            }
+        "#]]
+        .assert_eq(&format!(
+            "{:?}",
+            &Dot::with_config(graph, &[Config::EdgeNoLabel])
+        ));
+    }
+
+    fn assert_depends_on(result: &ResolvedEnv, pkg1: &str, pkg2: &str) {
+        let pkg1 = pkg1.parse().expect("Invalid pkg1");
+        let pkg2 = pkg2.parse().expect("Invalid pkg2");
+        let id1 = result.id_from_mod_name(&pkg1).expect("pkg1 not found");
+        let id2 = result.id_from_mod_name(&pkg2).expect("pkg2 not found");
+        assert!(
+            result.graph().contains_edge(id1, id2),
+            "{} does not depend on {}",
+            pkg1,
+            pkg2
+        );
+    }
+
+    fn assert_no_depends_on(result: &ResolvedEnv, pkg1: &str, pkg2: &str) {
+        let pkg1 = pkg1.parse().expect("Invalid pkg1");
+        let pkg2 = pkg2.parse().expect("Invalid pkg2");
+        let id1 = result.id_from_mod_name(&pkg1);
+        let id2 = result.id_from_mod_name(&pkg2);
+        if let (Some(id1), Some(id2)) = (id1, id2) {
+            assert!(
+                !result.graph().contains_edge(id1, id2),
+                "{} depends on {}",
+                pkg1,
+                pkg2
+            );
+        } else {
+            // Ok, since at least one of the nodes don't exist at all
+        }
+    }
+
+    fn create_mock_local_source(module: &MoonMod) -> ModuleSource {
+        ModuleSource::from_version(
+            module.name.parse().unwrap(),
+            module.version.clone().unwrap(),
+        )
+    }
+
+    fn create_mock_root(root: impl Into<Rc<MoonMod>>) -> Vec<(ModuleSource, Rc<MoonMod>)> {
+        let root = root.into();
+        let root_src = create_mock_local_source(&root);
+        let roots = vec![(root_src, root)];
+        roots
+    }
+
+    #[test]
+    fn test_basic_resolve() {
+        let registry = create_mock_registry();
+        let mut env = ResolverEnv::new(&registry);
+        let mut resolver = MvsSolver;
+        let root = create_mock_module("root/module", "0.1.0", [("dep/one", "0.1.1")]);
+        let roots = create_mock_root(root);
+        let result = resolver.resolve(&mut env, &roots).expect("Resolve failed");
+        assert_depends_on(&result, "root/module@0.1.0", "dep/one@0.1.1");
+    }
+
+    #[test]
+    fn test_dependency_should_be_max_among_requested_version() {
+        let registry = create_mock_registry();
+        let mut env = ResolverEnv::new(&registry);
+        let mut resolver = MvsSolver;
+        let root = create_mock_module(
+            "root/module",
+            "0.1.0",
+            [("dep/one", "0.1.1"), ("dep/two", "0.1.1")],
+        );
+        let roots = create_mock_root(root);
+        let result = resolver.resolve(&mut env, &roots).expect("Resolve failed");
+
+        // dep/two depend on dep/one@0.1.3, so the result
+        // should be dep/one@0.1.3 instead of 0.1.1
+        assert_depends_on(&result, "root/module@0.1.0", "dep/one@0.1.3");
+        assert_depends_on(&result, "root/module@0.1.0", "dep/two@0.1.1");
+        assert_no_depends_on(&result, "root/module@0.1.0", "dep/one@0.1.1")
+    }
+
+    #[test]
+    fn test_incompatible_versions() {
+        let registry = create_mock_registry();
+        let mut env = ResolverEnv::new(&registry);
+        let mut resolver = MvsSolver;
+        let root = create_mock_module(
+            "root/module",
+            "0.1.0",
+            [("dep/one", "0.2.1"), ("dep/two", "0.1.1")],
+        );
+        let roots = create_mock_root(root);
+        let result = resolver.resolve(&mut env, &roots).expect("Resolve failed");
+
+        // dep/one@0.2.1 is incompatible with dep/two@0.1.1, so there should be
+        // two dep/one instances: one is 0.2.1 depended by root/module, and the other
+        // is 0.1.3 depended by dep/two
+
+        assert_depends_on(&result, "root/module@0.1.0", "dep/one@0.2.1");
+        assert_depends_on(&result, "dep/two@0.1.1", "dep/one@0.1.3");
+    }
+
+    #[test]
+    fn test_nonexistent_modules() {
+        let registry = create_mock_registry();
+        let mut env = ResolverEnv::new(&registry);
+        let mut resolver = MvsSolver;
+        let root = create_mock_module(
+            "root/module",
+            "0.1.0",
+            [("dep/one", "0.1.1"), ("dep/nonexistant", "0.1.1")],
+        );
+        let roots = create_mock_root(root);
+        let result = resolver.resolve(&mut env, &roots);
+        assert!(result.is_none());
+    }
+
+    #[test]
+    fn test_transitive_dependencies() {
+        let registry = create_mock_registry();
+        let mut env = ResolverEnv::new(&registry);
+        let mut resolver = MvsSolver;
+        let root = create_mock_module("root/module", "0.1.0", [("dep/three", "0.2.0")]);
+        let roots = create_mock_root(root);
+        let result = resolver.resolve(&mut env, &roots).expect("Resolve failed");
+
+        assert_depends_on(&result, "root/module@0.1.0", "dep/three@0.2.0");
+        assert_depends_on(&result, "dep/two@0.2.0", "dep/one@0.2.0");
+        assert_no_depends_on(&result, "root/module@0.1.0", "dep/one@0.2.0");
+        assert_no_depends_on(&result, "root/module@0.1.0", "dep/two@0.2.0");
+    }
+
+    fn resolve(registry: &RegistryList, root: Rc<MoonMod>) -> Vec<ModuleSource> {
+        let mut resolver = MvsSolver;
+        let mut env = ResolverEnv::new(registry);
+        let roots = create_mock_root(root);
+        let result = resolver.resolve(&mut env, &roots);
+        match result {
+            Some(result) => {
+                let pkgs = result.all_packages().cloned().collect::<Vec<_>>();
+                pkgs
+            }
+            None => {
+                println!("Errors: {}", ResolverErrors(env.into_errors()));
+                vec![]
+            }
+        }
+    }
+
+    fn check_resolve_result(reg: &RegistryList, root: Rc<MoonMod>, expected: expect_test::Expect) {
+        expected.assert_debug_eq(&resolve(reg, root));
+    }
+
+    // the following tests port from https://github.com/golang/go/blob/22344e1/src/cmd/go/internal/mvs/mvs_test.go
+
+    #[test]
+    fn test_blog() {
+        // name: blog
+        // A: B1 C2
+        // B1: D3
+        // C1: D2
+        // C2: D4
+        // C3: D5
+        // C4: G1
+        // D2: E1
+        // D3: E2
+        // D4: E2 F1
+        // D5: E2
+        // G1: C4
+        // A2: B1 C4 D4
+        // build A:       A B1 C2 D4 E2 F1
+        // upgrade* A:    A B1 C4 D5 E2 F1 G1
+        // upgrade A C4:  A B1 C4 D4 E2 F1 G1
+        // build A2:     A2 B1 C4 D4 E2 F1 G1
+        // downgrade A2 D2: A2 C4 D2 E2 F1 G1
+        let mut registry = MockRegistry::new();
+        registry.parse(vec![
+            vec![("A", 0), ("B", 1), ("C", 2)],
+            vec![("B", 1), ("D", 3)],
+            vec![("C", 2), ("D", 2)],
+            vec![("C", 2), ("D", 4)],
+            vec![("C", 3), ("D", 5)],
+            vec![("C", 4), ("G", 1)],
+            vec![("D", 2), ("E", 1)],
+            vec![("D", 3), ("E", 2)],
+            vec![("D", 4), ("E", 2), ("F", 1)],
+            vec![("D", 5), ("E", 2)],
+            vec![("G", 1), ("C", 4)],
+            vec![("A", 2), ("B", 1), ("C", 4), ("D", 4)],
+        ]);
+
+        let root1 = registry.get_module("t/A", "0.1.0");
+        let root2 = registry.get_module("t/A", "0.1.2");
+        let rl = RegistryList::with_registry(Box::new(registry));
+        check_resolve_result(
+            &rl,
+            root1,
+            expect_test::expect![[r#"
+            [
+                t/A@0.1.0,
+                t/B@0.1.1,
+                t/C@0.1.2,
+                t/D@0.1.4,
+                t/E@0.1.2,
+                t/F@0.1.1,
+            ]
+        "#]],
+        );
+
+        check_resolve_result(
+            &rl,
+            root2,
+            expect_test::expect![[r#"
+            [
+                t/A@0.1.2,
+                t/B@0.1.1,
+                t/C@0.1.4,
+                t/D@0.1.4,
+                t/E@0.1.2,
+                t/F@0.1.1,
+                t/G@0.1.1,
+            ]
+        "#]],
+        );
+    }
+
+    #[test]
+    fn test_trim() {
+        // name: trim
+        // A: B1 C2
+        // B1: D3
+        // C2: B2
+        // B2:
+        // build A: A B2 C2 D3
+        let mut registry = MockRegistry::new();
+        registry.parse(vec![
+            vec![("A", 0), ("B", 1), ("C", 2)],
+            vec![("B", 1), ("D", 3)],
+            vec![("C", 2), ("B", 2)],
+            vec![("B", 2)],
+        ]);
+        let root = registry.get_module("t/A", "0.1.0");
+        let rl = RegistryList::with_registry(Box::new(registry));
+        check_resolve_result(
+            &rl,
+            root,
+            expect![[r#"
+            [
+                t/A@0.1.0,
+                t/B@0.1.2,
+                t/C@0.1.2,
+            ]
+        "#]],
+        );
+    }
+
+    #[test]
+    fn test_cross1() {
+        // name: cross1
+        // A: B C
+        // B: D1
+        // C: D2
+        // D1: E2
+        // D2: E1
+        // build A: A B C D2 E2
+        let mut registry = MockRegistry::new();
+        registry.parse(vec![
+            vec![("A", 0), ("B", 0), ("C", 0)],
+            vec![("B", 0), ("D", 1)],
+            vec![("C", 0), ("D", 2)],
+            vec![("D", 1), ("E", 2)],
+            vec![("D", 2), ("E", 1)],
+        ]);
+        let root = registry.get_module("t/A", "0.1.0");
+        let rl = RegistryList::with_registry(Box::new(registry));
+        check_resolve_result(
+            &rl,
+            root,
+            expect![[r#"
+                [
+                    t/A@0.1.0,
+                    t/B@0.1.0,
+                    t/C@0.1.0,
+                    t/D@0.1.2,
+                    t/E@0.1.2,
+                ]
+            "#]],
+        );
+    }
+
+    #[test]
+    fn test_cross1v() {
+        // name: cross1V
+        // A: B2 C D2 E1
+        // B1:
+        // B2: D1
+        // C: D2
+        // D1: E2
+        // D2: E1
+        // build A: A B2 C D2 E2
+        let mut registry = MockRegistry::new();
+        registry.parse(vec![
+            vec![("A", 0), ("B", 2), ("C", 0), ("D", 2), ("E", 1)],
+            vec![("B", 2), ("D", 1)],
+            vec![("C", 0), ("D", 2)],
+            vec![("D", 1), ("E", 2)],
+            vec![("D", 2), ("E", 1)],
+        ]);
+        let root = registry.get_module("t/A", "0.1.0");
+        let rl = RegistryList::with_registry(Box::new(registry));
+        check_resolve_result(
+            &rl,
+            root,
+            expect![[r#"
+            [
+                t/A@0.1.0,
+                t/B@0.1.2,
+                t/C@0.1.0,
+                t/D@0.1.2,
+                t/E@0.1.2,
+            ]
+        "#]],
+        );
+    }
+
+    #[test]
+    fn test_cross1u() {
+        // name: cross1U
+        // A: B1 C
+        // B1:
+        // B2: D1
+        // C: D2
+        // D1: E2
+        // D2: E1
+        // build A:      A B1 C D2 E1
+        // upgrade A B2: A B2 C D2 E2
+        let mut registry = MockRegistry::new();
+        registry.parse(vec![
+            vec![("A", 0), ("B", 1), ("C", 0)],
+            vec![("B", 1)],
+            vec![("B", 2), ("D", 1)],
+            vec![("C", 0), ("D", 2)],
+            vec![("D", 1), ("E", 2)],
+            vec![("D", 2), ("E", 1)],
+        ]);
+        let root = registry.get_module("t/A", "0.1.0");
+        let rl = RegistryList::with_registry(Box::new(registry));
+        check_resolve_result(
+            &rl,
+            root,
+            expect![[r#"
+            [
+                t/A@0.1.0,
+                t/B@0.1.1,
+                t/C@0.1.0,
+                t/D@0.1.2,
+                t/E@0.1.1,
+            ]
+        "#]],
+        );
+    }
+
+    #[test]
+    fn test_cross1r() {
+        // name: cross1R
+        // A: B C
+        // B: D2
+        // C: D1
+        // D1: E2
+        // D2: E1
+        // build A: A B C D2 E2
+        let mut registry = MockRegistry::new();
+        registry.parse(vec![
+            vec![("A", 0), ("B", 0), ("C", 0)],
+            vec![("B", 0), ("D", 2)],
+            vec![("C", 0), ("D", 1)],
+            vec![("D", 1), ("E", 2)],
+            vec![("D", 2), ("E", 1)],
+        ]);
+        let root = registry.get_module("t/A", "0.1.0");
+        let rl = RegistryList::with_registry(Box::new(registry));
+        check_resolve_result(
+            &rl,
+            root,
+            expect![[r#"
+            [
+                t/A@0.1.0,
+                t/B@0.1.0,
+                t/C@0.1.0,
+                t/D@0.1.2,
+                t/E@0.1.2,
+            ]
+        "#]],
+        );
+    }
+    #[test]
+    fn test_cross1x() {
+        // name: cross1X
+        // A: B C
+        // B: D1 E2
+        // C: D2
+        // D1: E2
+        // D2: E1
+        // build A: A B C D2 E2
+        let mut registry = MockRegistry::new();
+        registry.parse(vec![
+            vec![("A", 0), ("B", 0), ("C", 0)],
+            vec![("B", 0), ("D", 1), ("E", 2)],
+            vec![("C", 0), ("D", 2)],
+            vec![("D", 1), ("E", 2)],
+            vec![("D", 2), ("E", 1)],
+        ]);
+        let root = registry.get_module("t/A", "0.1.0");
+        let rl = RegistryList::with_registry(Box::new(registry));
+        check_resolve_result(
+            &rl,
+            root,
+            expect![[r#"
+            [
+                t/A@0.1.0,
+                t/B@0.1.0,
+                t/C@0.1.0,
+                t/D@0.1.2,
+                t/E@0.1.2,
+            ]
+        "#]],
+        )
+    }
+
+    #[test]
+    fn test_cross2() {
+        // name: cross2
+        // A: B D2
+        // B: D1
+        // D1: E2
+        // D2: E1
+        // build A: A B D2 E2
+        let mut registry = MockRegistry::new();
+        registry.parse(vec![
+            vec![("A", 0), ("B", 0), ("D", 2)],
+            vec![("B", 0), ("D", 1)],
+            vec![("D", 1), ("E", 2)],
+            vec![("D", 2), ("E", 1)],
+        ]);
+        let root = registry.get_module("t/A", "0.1.0");
+        let rl = RegistryList::with_registry(Box::new(registry));
+        check_resolve_result(
+            &rl,
+            root,
+            expect![[r#"
+            [
+                t/A@0.1.0,
+                t/B@0.1.0,
+                t/D@0.1.2,
+                t/E@0.1.2,
+            ]
+        "#]],
+        );
+    }
+
+    #[test]
+    fn test_cross2x() {
+        // name: cross2X
+        // A: B D2
+        // B: D1 E2
+        // C: D2
+        // D1: E2
+        // D2: E1
+        // build A: A B D2 E2
+        let mut registry = MockRegistry::new();
+        registry.parse(vec![
+            vec![("A", 0), ("B", 0), ("D", 2)],
+            vec![("B", 0), ("D", 1), ("E", 2)],
+            vec![("C", 0), ("D", 2)],
+            vec![("D", 1), ("E", 2)],
+            vec![("D", 2), ("E", 1)],
+        ]);
+        let root = registry.get_module("t/A", "0.1.0");
+        let rl = RegistryList::with_registry(Box::new(registry));
+        check_resolve_result(
+            &rl,
+            root,
+            expect![[r#"
+            [
+                t/A@0.1.0,
+                t/B@0.1.0,
+                t/D@0.1.2,
+                t/E@0.1.2,
+            ]
+        "#]],
+        );
+    }
+
+    #[test]
+    fn test_cross3() {
+        // name: cross3
+        // A: B D2 E1
+        // B: D1
+        // D1: E2
+        // D2: E1
+        // build A: A B D2 E2
+        let mut registry = MockRegistry::new();
+        registry.parse(vec![
+            vec![("A", 0), ("B", 0), ("D", 2), ("E", 1)],
+            vec![("B", 0), ("D", 1)],
+            vec![("D", 1), ("E", 2)],
+            vec![("D", 2), ("E", 1)],
+        ]);
+        let root = registry.get_module("t/A", "0.1.0");
+        let rl = RegistryList::with_registry(Box::new(registry));
+        check_resolve_result(
+            &rl,
+            root,
+            expect![[r#"
+            [
+                t/A@0.1.0,
+                t/B@0.1.0,
+                t/D@0.1.2,
+                t/E@0.1.2,
+            ]
+        "#]],
+        );
+    }
+
+    #[test]
+    fn test_cross4() {
+        // name: cross4
+        // A1: B1 D2
+        // A2: B2 D2
+        // B1: D1
+        // B2: D2
+        // D1: E2
+        // D2: E1
+        // build A1: A1 B1 D2 E2
+        // build A2: A2 B2 D2 E1
+        let mut registry = MockRegistry::new();
+        registry.parse(vec![
+            vec![("A", 1), ("B", 1), ("D", 2)],
+            vec![("A", 2), ("B", 2), ("D", 2)],
+            vec![("B", 1), ("D", 1)],
+            vec![("B", 2), ("D", 2)],
+            vec![("D", 1), ("E", 2)],
+            vec![("D", 2), ("E", 1)],
+        ]);
+
+        let root = registry.get_module("t/A", "0.1.1");
+        let root2 = registry.get_module("t/A", "0.1.2");
+        let rl = RegistryList::with_registry(Box::new(registry));
+        check_resolve_result(
+            &rl,
+            root,
+            expect![[r#"
+                [
+                    t/A@0.1.1,
+                    t/B@0.1.1,
+                    t/D@0.1.2,
+                    t/E@0.1.2,
+                ]
+            "#]],
+        );
+
+        check_resolve_result(
+            &rl,
+            root2,
+            expect![[r#"
+                [
+                    t/A@0.1.2,
+                    t/B@0.1.2,
+                    t/D@0.1.2,
+                    t/E@0.1.1,
+                ]
+            "#]],
+        );
+    }
+
+    #[test]
+    fn test_cross5() {
+        // name: cross5
+        // A: D1
+        // D1: E2
+        // D2: E1
+        // build A:       A D1 E2
+        // upgrade* A:    A D2 E2
+        // upgrade A D2:  A D2 E2
+        let mut registry = MockRegistry::new();
+        registry.parse(vec![
+            vec![("A", 0), ("D", 1)],
+            vec![("D", 1), ("E", 2)],
+            vec![("D", 2), ("E", 1)],
+        ]);
+
+        let root = registry.get_module("t/A", "0.1.0");
+        let rl = RegistryList::with_registry(Box::new(registry));
+        check_resolve_result(
+            &rl,
+            root,
+            expect![[r#"
+            [
+                t/A@0.1.0,
+                t/D@0.1.1,
+                t/E@0.1.2,
+            ]
+        "#]],
+        );
+    }
+
+    #[test]
+    fn test_cross6() {
+        // name: cross6
+        // A: D2
+        // D1: E2
+        // D2: E1
+        // build A:      A D2 E1
+        let mut registry = MockRegistry::new();
+        registry.parse(vec![
+            vec![("A", 0), ("D", 2)],
+            vec![("D", 1), ("E", 2)],
+            vec![("D", 2), ("E", 1)],
+        ]);
+        let root = registry.get_module("t/A", "0.1.0");
+        let rl = RegistryList::with_registry(Box::new(registry));
+        check_resolve_result(
+            &rl,
+            root,
+            expect![[r#"
+        [
+            t/A@0.1.0,
+            t/D@0.1.2,
+            t/E@0.1.1,
+        ]
+    "#]],
+        );
+    }
+
+    #[test]
+    fn test_cross7() {
+        // name: cross7
+        // A: B C
+        // B: D1
+        // C: E1
+        // D1: E2
+        // E1: D2
+        // build A: A B C D2 E2
+        let mut registry = MockRegistry::new();
+        registry.parse(vec![
+            vec![("A", 0), ("B", 0), ("C", 0)],
+            vec![("B", 0), ("D", 1)],
+            vec![("C", 0), ("E", 1)],
+            vec![("D", 1), ("E", 2)],
+            vec![("E", 1), ("D", 2)],
+        ]);
+        let root = registry.get_module("t/A", "0.1.0");
+        let rl = RegistryList::with_registry(Box::new(registry));
+        check_resolve_result(
+            &rl,
+            root,
+            expect![[r#"
+                [
+                    t/A@0.1.0,
+                    t/B@0.1.0,
+                    t/C@0.1.0,
+                    t/E@0.1.2,
+                    t/D@0.1.2,
+                ]
+            "#]],
+        );
+    }
+
+    #[test]
+    fn test_cross8() {
+        // name: cross8
+        // M: A1 B1
+        // A1: X1
+        // B1: X2
+        // X1: I1
+        // X2:
+        // build M: M A1 B1 I1 X2
+        let mut registry = MockRegistry::new();
+        registry.parse(vec![
+            vec![("M", 0), ("A", 1), ("B", 1)],
+            vec![("A", 1), ("X", 1)],
+            vec![("B", 1), ("X", 2)],
+            vec![("X", 1), ("I", 1)],
+            vec![("X", 2)],
+        ]);
+        let root = registry.get_module("t/M", "0.1.0");
+        let rl = RegistryList::with_registry(Box::new(registry));
+        check_resolve_result(
+            &rl,
+            root,
+            expect![[r#"
+                [
+                    t/M@0.1.0,
+                    t/A@0.1.1,
+                    t/B@0.1.1,
+                    t/X@0.1.2,
+                ]
+            "#]],
+        );
+    }
+
+    #[test]
+    fn test_drop() {
+        // name: drop
+        // A: B1 C1
+        // B1: D1
+        // B2:
+        // C2:
+        // D2:
+        // build A:    A B1 C1 D1
+        let mut registry = MockRegistry::new();
+        registry.parse(vec![
+            vec![("A", 0), ("B", 1), ("C", 1)],
+            vec![("B", 1), ("D", 1)],
+            vec![("B", 2)],
+            vec![("C", 2)],
+            vec![("D", 2)],
+        ]);
+        let root = registry.get_module("t/A", "0.1.0");
+        let rl = RegistryList::with_registry(Box::new(registry));
+        check_resolve_result(
+            &rl,
+            root,
+            expect![[r#"
+                [
+                    t/A@0.1.0,
+                    t/B@0.1.1,
+                    t/C@0.1.1,
+                    t/D@0.1.1,
+                ]
+            "#]],
+        );
+    }
+
+    #[test]
+    fn test_simplify() {
+        // name: simplify
+        // A: B1 C1
+        // B1: C2
+        // C1: D1
+        // C2:
+        // build A: A B1 C2 D1
+        let mut registry = MockRegistry::new();
+        registry.parse(vec![
+            vec![("A", 0), ("B", 1), ("C", 1)],
+            vec![("B", 1), ("C", 2)],
+            vec![("C", 1), ("D", 1)],
+            vec![("C", 2)],
+        ]);
+        let root = registry.get_module("t/A", "0.1.0");
+        let rl = RegistryList::with_registry(Box::new(registry));
+        check_resolve_result(
+            &rl,
+            root,
+            expect![[r#"
+                [
+                    t/A@0.1.0,
+                    t/B@0.1.1,
+                    t/C@0.1.2,
+                ]
+            "#]],
+        );
+    }
+
+    #[test]
+    #[ignore = "not support hidden"]
+    fn test_up1() {
+        // name: up1
+        // A: B1 C1
+        // B1:
+        // B2:
+        // B3:
+        // B4:
+        // B5.hidden:
+        // C2:
+        // C3:
+        // build A:    A B1 C1
+        // upgrade* A: A B4 C3
+    }
+
+    #[test]
+    #[ignore = "not support hidden"]
+    fn test_up2() {
+        // name: up2
+        // A: B5.hidden C1
+        // B1:
+        // B2:
+        // B3:
+        // B4:
+        // B5.hidden:
+        // C2:
+        // C3:
+        // build A:    A B5.hidden C1
+        // upgrade* A: A B5.hidden C3
+    }
+
+    #[test]
+    fn test_down1() {
+        // name: down1
+        // A: B2
+        // B1: C1
+        // B2: C2
+        // build A:        A B2 C2
+        // downgrade A C1: A B1 C1
+        let mut registry = MockRegistry::new();
+        registry.parse(vec![
+            vec![("A", 0), ("B", 2)],
+            vec![("B", 1), ("C", 1)],
+            vec![("B", 2), ("C", 2)],
+        ]);
+        let root = registry.get_module("t/A", "0.1.0");
+        let rl = RegistryList::with_registry(Box::new(registry));
+        check_resolve_result(
+            &rl,
+            root,
+            expect![[r#"
+                [
+                    t/A@0.1.0,
+                    t/B@0.1.2,
+                    t/C@0.1.2,
+                ]
+            "#]],
+        );
+    }
+
+    #[test]
+    fn test_down2() {
+        // name: down2
+        // A: B2 E2
+        // B1:
+        // B2: C2 F2
+        // C1:
+        // D1:
+        // C2: D2 E2
+        // D2: B2
+        // E2: D2
+        // E1:
+        // F1:
+        // build A:        A B2 C2 D2 E2 F2
+        // downgrade A F1: A B1 C1 D1 E1 F1
+        let mut registry = MockRegistry::new();
+        registry.parse(vec![
+            vec![("A", 0), ("B", 2), ("E", 2)],
+            vec![("B", 1)],
+            vec![("B", 2), ("C", 2), ("F", 2)],
+            vec![("C", 1)],
+            vec![("D", 1)],
+            vec![("C", 2), ("D", 2), ("E", 2)],
+            vec![("D", 2), ("B", 2)],
+            vec![("E", 2), ("D", 2)],
+            vec![("E", 1)],
+            vec![("F", 1)],
+        ]);
+        let root = registry.get_module("t/A", "0.1.0");
+        let rl = RegistryList::with_registry(Box::new(registry));
+        check_resolve_result(
+            &rl,
+            root,
+            expect![[r#"
+                [
+                    t/A@0.1.0,
+                    t/B@0.1.2,
+                    t/E@0.1.2,
+                    t/D@0.1.2,
+                    t/C@0.1.2,
+                    t/F@0.1.2,
+                ]
+            "#]],
+        );
+    }
+
+    #[test]
+    fn test_downcross1() {
+        // name: downcross1
+        // A: B2 C1
+        // B1: C2
+        // B2: C1
+        // C1: D2
+        // C2:
+        // D1:
+        // D2:
+        // build A:        A B2 C1 D2
+        // downgrade A D1: A       D1
+        let mut registry = MockRegistry::new();
+        registry.parse(vec![
+            vec![("A", 0), ("B", 2), ("C", 1)],
+            vec![("B", 1), ("C", 2)],
+            vec![("B", 2), ("C", 1)],
+            vec![("C", 1), ("D", 2)],
+            vec![("D", 1)],
+            vec![("D", 2)],
+        ]);
+        let root = registry.get_module("t/A", "0.1.0");
+        let rl = RegistryList::with_registry(Box::new(registry));
+        check_resolve_result(
+            &rl,
+            root,
+            expect![[r#"
+                [
+                    t/A@0.1.0,
+                    t/B@0.1.2,
+                    t/C@0.1.1,
+                    t/D@0.1.2,
+                ]
+            "#]],
+        );
+    }
+
+    #[test]
+    fn test_downcross2() {
+        // name: downcross2
+        // A: B2
+        // B1: C1
+        // B2: D2
+        // C1:
+        // D1:
+        // D2:
+        // build A:        A B2    D2
+        // downgrade A D1: A B1 C1 D1
+        let mut registry = MockRegistry::new();
+        registry.parse(vec![
+            vec![("A", 0), ("B", 2)],
+            vec![("B", 1), ("C", 1)],
+            vec![("B", 2), ("D", 2)],
+            vec![("D", 1)],
+            vec![("D", 2)],
+        ]);
+        let root = registry.get_module("t/A", "0.1.0");
+        let rl = RegistryList::with_registry(Box::new(registry));
+        check_resolve_result(
+            &rl,
+            root,
+            expect![[r#"
+                [
+                    t/A@0.1.0,
+                    t/B@0.1.2,
+                    t/D@0.1.2,
+                ]
+            "#]],
+        );
+    }
+
+    #[test]
+    fn test_downcycle() {
+        // name: downcycle
+        // A: A B2
+        // B2: A
+        // B1:
+        // build A:        A B2
+        // downgrade A B1: A B1
+        let mut registry = MockRegistry::new();
+        registry.parse(vec![vec![("A", 0), ("B", 2)], vec![("B", 2), ("A", 0)]]);
+        let root = registry.get_module("t/A", "0.1.0");
+        let rl = RegistryList::with_registry(Box::new(registry));
+        check_resolve_result(
+            &rl,
+            root,
+            expect![[r#"
+                [
+                    t/A@0.1.0,
+                    t/B@0.1.2,
+                ]
+            "#]],
+        );
+    }
+
+    #[test]
+    #[ignore = "not support hidden"]
+    fn test_downhiddenartifact() {
+        // name: downhiddenartifact
+        // A: B3 C2
+        // A1: B3
+        // B1: E1
+        // B2.hidden:
+        // B3: D2
+        // C1: B2.hidden
+        // C2: D2
+        // D1:
+        // D2:
+        // build A1: A1 B3 D2
+        // downgrade A1 D1: A1 B1 D1 E1
+        // build A: A B3 C2 D2
+        // downgrade A D1: A B2.hidden C1 D1
+    }
+
+    #[test]
+    #[ignore = "not support hidden"]
+    fn test_downhiddencross() {
+        // name: downhiddencross
+        // A: B3 C3
+        // B1: C2.hidden
+        // B2.hidden:
+        // B3: D2
+        // C1: B2.hidden
+        // C2.hidden:
+        // C3: D2
+        // D1:
+        // D2:
+        // build A: A B3 C3 D2
+        // downgrade A D1: A B2.hidden C2.hidden D1
+    }
+
+    #[test]
+    #[ignore = "not support hidden"]
+    fn test_noprev1() {
+        // name: noprev1
+        // A: B4 C2
+        // B2.hidden:
+        // C2:
+        // build A:               A B4        C2
+        // downgrade A B2.hidden: A B2.hidden C2
+    }
+
+    #[test]
+    #[ignore = "not support hidden"]
+    fn test_noprev2() {
+        // name: noprev2
+        // A: B4 C2
+        // B2.hidden:
+        // B1:
+        // C2:
+        // build A:               A B4        C2
+        // downgrade A B2.hidden: A B2.hidden C2
+    }
+
+    #[test]
+    #[ignore = "not support hidden"]
+    fn test_noprev3() {
+        // name: noprev3
+        // A: B4 C2
+        // B3:
+        // B2.hidden:
+        // C2:
+        // build A:               A B4        C2
+        // downgrade A B2.hidden: A B2.hidden C2
+    }
+
+    #[test]
+    #[ignore = "Cyclic dependency detection is not supported yet"]
+    fn test_cycle1() {
+        // name: cycle1
+        // A: B1
+        // B1: A1
+        // B2: A2
+        // B3: A3
+        // build A:      A B1
+        // upgrade A B2: A B2
+        // upgrade* A:   A B3
+        let mut registry = MockRegistry::new();
+        registry.parse(vec![
+            vec![("A", 0), ("B", 1)],
+            vec![("B", 1), ("A", 1)],
+            vec![("B", 2), ("A", 2)],
+            vec![("B", 3), ("A", 3)],
+        ]);
+        let root_initial = registry.get_module("t/A", "0.1.0");
+        let root_upgrade_b2 = registry.get_module("t/A", "0.1.0");
+        let root_upgrade_star = registry.get_module("t/A", "0.1.0");
+        let rl = RegistryList::with_registry(Box::new(registry));
+        check_resolve_result(
+            &rl,
+            root_initial,
+            expect![[r#"
+                []
+            "#]],
+        );
+
+        check_resolve_result(
+            &rl,
+            root_upgrade_b2,
+            expect![[r#"
+                []
+            "#]],
+        );
+
+        check_resolve_result(
+            &rl,
+            root_upgrade_star,
+            expect![[r#"
+                []
+            "#]],
+        );
+    }
+
+    #[test]
+    #[ignore = "Cyclic dependency detection is not supported yet"]
+    fn test_cycle2() {
+        // name: cycle2
+        // A: B1
+        // A1: C1
+        // A2: D1
+        // B1: A1
+        // B2: A2
+        // C1: A2
+        // C2:
+        // D2:
+        // build A:    A B1 C1 D1
+        // upgrade* A: A B2 C2 D2
+        let mut registry = MockRegistry::new();
+        registry.parse(vec![
+            vec![("A", 0), ("B", 1)],
+            vec![("A", 1), ("C", 1)],
+            vec![("A", 2), ("D", 1)],
+            vec![("B", 1), ("A", 1)],
+            vec![("B", 2), ("A", 2)],
+            vec![("C", 1), ("A", 2)],
+        ]);
+        let root_initial = registry.get_module("t/A", "0.1.0");
+        let root_upgrade_star = registry.get_module("t/A", "0.1.0");
+        let rl = RegistryList::with_registry(Box::new(registry));
+        check_resolve_result(
+            &rl,
+            root_initial,
+            expect![[r#"
+                [
+                    t/A@0.1.0,
+                    t/B@0.1.1,
+                    t/A@0.1.2,
+                    t/D@0.1.1,
+                ]
+            "#]],
+        );
+
+        check_resolve_result(
+            &rl,
+            root_upgrade_star,
+            expect![[r#"
+                [
+                    t/A@0.1.0,
+                    t/B@0.1.1,
+                    t/A@0.1.2,
+                    t/D@0.1.1,
+                ]
+            "#]],
+        );
+    }
+
+    #[test]
+    #[ignore = "Cyclic dependency detection is not supported yet"]
+    fn test_cycle3() {
+        // name: cycle3
+        // M: A1 C2
+        // A1: B1
+        // B1: C1
+        // B2: C2
+        // C1:
+        // C2: B2
+        // build M: M A1 B2 C2
+        // req M:     A1 B2
+        // req M A:   A1 B2
+        // req M C:   A1 C2
+        let mut registry = MockRegistry::new();
+        registry.parse(vec![
+            vec![("M", 0), ("A", 1), ("C", 2)],
+            vec![("A", 1), ("B", 1)],
+            vec![("B", 1), ("C", 1)],
+            vec![("B", 2), ("C", 2)],
+            vec![("C", 1)],
+            vec![("C", 2), ("B", 2)],
+        ]);
+        let root = registry.get_module("t/M", "0.1.0");
+        let rl = RegistryList::with_registry(Box::new(registry));
+        check_resolve_result(
+            &rl,
+            root,
+            expect![[r#"
+                [
+                    t/M@0.1.0,
+                    t/A@0.1.1,
+                    t/C@0.1.2,
+                    t/B@0.1.2,
+                ]
+            "#]],
+        );
+    }
+}
diff --git a/crates/mooncake/src/update.rs b/crates/mooncake/src/update.rs
new file mode 100644
index 00000000..678e2d44
--- /dev/null
+++ b/crates/mooncake/src/update.rs
@@ -0,0 +1,97 @@
+use std::path::Path;
+
+use anyhow::bail;
+use colored::Colorize;
+use moonutil::mooncakes::RegistryConfig;
+
+fn clone_registry_index(
+    registry_config: &RegistryConfig,
+    target_dir: &Path,
+) -> anyhow::Result<i32> {
+    let output = std::process::Command::new("git")
+        .arg("clone")
+        .arg(&registry_config.index)
+        .arg(target_dir)
+        .spawn()?
+        .wait();
+    match output {
+        Ok(status) => {
+            if !status.success() {
+                bail!("Failed to clone registry index");
+            }
+            Ok(0)
+        }
+        Err(e) => {
+            eprintln!("Failed to clone registry index: {}", e);
+            bail!("Failed to clone registry index");
+        }
+    }
+}
+
+fn pull_latest_registry_index(
+    _registry_config: &RegistryConfig,
+    target_dir: &Path,
+) -> anyhow::Result<i32> {
+    let output = std::process::Command::new("git")
+        .arg("pull")
+        .arg("origin")
+        .arg("main")
+        .current_dir(target_dir)
+        .spawn()?
+        .wait()?;
+
+    match output.code() {
+        Some(code) => {
+            if code != 0 {
+                bail!("Failed to pull registry index");
+            }
+            Ok(0)
+        }
+        None => {
+            eprintln!("Failed to pull registry index");
+            bail!("Failed to pull registry index");
+        }
+    }
+}
+
+pub fn update(target_dir: &Path, registry_config: &RegistryConfig) -> anyhow::Result<i32> {
+    if target_dir.exists() {
+        let output = std::process::Command::new("git")
+            .arg("remote")
+            .arg("get-url")
+            .arg("origin")
+            .current_dir(target_dir)
+            .output()?;
+
+        let url = String::from_utf8_lossy(&output.stdout).trim().to_string();
+        if url == registry_config.index {
+            let result = pull_latest_registry_index(registry_config, target_dir);
+            if result.is_err() {
+                eprintln!(
+                    "Failed to update registry, {}",
+                    "re-cloning".bold().yellow()
+                );
+                std::fs::remove_dir_all(target_dir)?;
+                clone_registry_index(registry_config, target_dir)?;
+                eprintln!("{}", "Registry index re-cloned successfully".bold().green());
+                Ok(0)
+            } else {
+                eprintln!("{}", "Registry index updated successfully".bold().green());
+                Ok(0)
+            }
+        } else {
+            eprintln!(
+                "Registry index is not cloned from the same URL, {}",
+                "re-cloning".yellow().bold()
+            );
+            std::fs::remove_dir_all(target_dir)?;
+            clone_registry_index(registry_config, target_dir)?;
+            eprintln!("{}", "Registry index re-cloned successfully".bold().green());
+            Ok(0)
+        }
+    } else {
+        clone_registry_index(registry_config, target_dir)?;
+        eprintln!("{}", "Registry index cloned successfully".bold().green());
+        Ok(0)
+    }
+}
diff --git a/crates/moonutil/Cargo.toml b/crates/moonutil/Cargo.toml
new file mode 100644
index 00000000..11657e06
--- /dev/null
+++ b/crates/moonutil/Cargo.toml
@@ -0,0 +1,33 @@
+[package]
+name = "moonutil"
+version = "0.1.0"
+edition.workspace = true
+rust-version.workspace = true
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+home.workspace = true
+anyhow.workspace = true
+colored.workspace = true
+indexmap.workspace = true
+serde.workspace = true
+serde_json_lenient.workspace = true
+walkdir.workspace = true
+clap.workspace = true
+dialoguer.workspace = true
+dunce.workspace = true
+bincode.workspace = true
+semver.workspace = true
+fs4.workspace = true
+petgraph.workspace = true
+ariadne.workspace = true
+env_logger.workspace = true
+log.workspace = true
+
+[dev-dependencies]
+expect-test.workspace = true
+
+[build-dependencies]
+vergen = { version = "8.0.0", features = ["build", "git", "gitcl"] }
+chrono.workspace = true
diff --git a/crates/moonutil/build.rs b/crates/moonutil/build.rs
new file mode 100644
index 00000000..6518676e
--- /dev/null
+++ b/crates/moonutil/build.rs
@@ -0,0 +1,16 @@
+use chrono::DateTime;
+use std::{
+    error::Error,
+    time::{SystemTime, UNIX_EPOCH},
+};
+use vergen::EmitBuilder;
+
+pub fn main() -> Result<(), Box<dyn Error>> {
+    EmitBuilder::builder().build_date().git_sha(true).emit()?;
+
+    let time = SystemTime::now().duration_since(UNIX_EPOCH).unwrap();
+    let datetime = DateTime::from_timestamp(time.as_secs() as i64, 0).unwrap();
+    let date_str = datetime.format("%Y%m%d").to_string();
+    println!("cargo:rustc-env=CARGO_PKG_VERSION=0.1.{}", date_str);
+    Ok(())
+}
diff --git a/crates/moonutil/src/cli.rs b/crates/moonutil/src/cli.rs
new file mode 100644
index 00000000..52430ff4
--- /dev/null
+++ b/crates/moonutil/src/cli.rs
@@ -0,0 +1,34 @@
+use serde::{Deserialize, Serialize};
+
+use crate::dirs::SourceTargetDirs;
+
+// #[derive(clap::Parser)]
+// pub struct StdInfo {
+//     #[arg(long)]
+//     std: bool,
+//     #[arg(long, default = "false")]
+//     no_std: bool,
+// }
+
+#[derive(Debug, clap::Parser, Serialize, Deserialize, Clone)]
+#[clap(next_display_order(2000), next_help_heading("Common options"))]
+pub struct UniversalFlags {
+    #[clap(flatten)]
+    pub source_tgt_dir: SourceTargetDirs,
+
+    /// Suppress output
+    #[clap(long, short = 'q', global = true)]
+    pub quiet: bool,
+
+    /// Increase verbosity
+    #[clap(long, short = 'v', global = true)]
+    pub verbose: bool,
+
+    /// Trace the execution of the program
+    #[clap(long, global = true)]
+    pub trace: bool,
+
+    /// Do not actually run the command
+    #[clap(long, global = true)]
+    pub dry_run: bool,
+}
diff --git a/crates/moonutil/src/common.rs b/crates/moonutil/src/common.rs
new file mode 100644
index 00000000..9549177d
--- /dev/null
+++ b/crates/moonutil/src/common.rs
@@ -0,0 +1,603 @@
+use anyhow::{bail, Context};
+use colored::Colorize;
+use fs4::FileExt;
+use serde::{Deserialize, Serialize};
+use std::collections::{HashMap, HashSet};
+use std::fs;
+use std::io::ErrorKind;
+use std::path::{Path, PathBuf};
+
+pub const MOON_MOD_JSON: &str = "moon.mod.json";
+pub const MOON_PKG_JSON: &str = "moon.pkg.json";
+pub const MOON_PID_NAME: &str = ".moon.pid";
+pub const MOONBITLANG_CORE: &str = "moonbitlang/core";
+
+pub const MOON_TEST_DELIMITER_BEGIN: &str = "----- BEGIN MOON TEST RESULT -----";
+pub const MOON_TEST_DELIMITER_END: &str = "----- END MOON TEST RESULT -----";
+
+pub const MOON_COVERAGE_DELIMITER_BEGIN: &str = "----- BEGIN MOONBIT COVERAGE -----";
+pub const MOON_COVERAGE_DELIMITER_END: &str = "----- END MOONBIT COVERAGE -----";
+
+pub const MOON_LOCK: &str = ".moon-lock";
+
+pub fn startswith_and_trim(s: &str, t: &str) -> String {
+    if s.starts_with(t) {
+        s.replacen(t, "", 1)
+    } else {
+        s.into()
+    }
+}
+
+pub fn read_module_from_json(path: &Path) -> anyhow::Result<MoonMod> {
+    let file = File::open(path)?;
+    let reader = BufReader::new(file);
+    let j =
+        serde_json_lenient::from_reader(reader).context(format!("Failed to parse {:?}", path))?;
+    convert_mod_json_to_module(j)
+}
+
+fn read_package_from_json(path: &Path) -> anyhow::Result<MoonPkg> {
+    let file = File::open(path)?;
+    let reader = BufReader::new(file);
+    let j =
+        serde_json_lenient::from_reader(reader).context(format!("Failed to parse {:?}", path))?;
+    convert_pkg_json_to_package(j)
+}
+
+pub fn write_module_json_to_file(m: &MoonModJSON, source_dir: &Path) -> anyhow::Result<()> {
+    let p = source_dir.join(MOON_MOD_JSON);
+    let file = File::create(p)?;
+    let mut writer = BufWriter::new(file);
+    serde_json_lenient::to_writer_pretty(&mut writer, &m)?;
+    Ok(())
+}
+
+pub fn write_package_json_to_file(pkg: &MoonPkgJSON, path: &Path) -> anyhow::Result<()> {
+    let file = File::create(path)?;
+    let mut writer = BufWriter::new(file);
+    serde_json_lenient::to_writer_pretty(&mut writer, &pkg)?;
+    Ok(())
+}
+
+use std::fs::File;
+use std::io::{BufReader, BufWriter};
+use std::str::FromStr;
+
+pub fn read_module_desc_file_in_dir(dir: &Path) -> anyhow::Result<MoonMod> {
+    if !dir.join(MOON_MOD_JSON).exists() {
+        bail!("`{:?}` does not exist", dir.join(MOON_MOD_JSON));
+    }
+    read_module_from_json(&dir.join(MOON_MOD_JSON))
+}
+
+pub fn read_package_desc_file_in_dir(dir: &Path) -> anyhow::Result<MoonPkg> {
+    if !dir.join(MOON_PKG_JSON).exists() {
+        bail!("`{:?}` does not exist", dir.join(MOON_PKG_JSON));
+    }
+    read_package_from_json(&dir.join(MOON_PKG_JSON))
+        .context(format!("Failed to load {:?}", dir.join(MOON_PKG_JSON)))
+}
+
+use clap::ValueEnum;
+
+pub use crate::dirs::check_moon_mod_exists;
+use crate::module::{convert_mod_json_to_module, MoonMod, MoonModJSON};
+use crate::package::{convert_pkg_json_to_package, MoonPkg, MoonPkgJSON};
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, ValueEnum)]
+#[repr(u8)]
+pub enum OutputFormat {
+    Wat,
+    Wasm,
+    Js,
+}
+
+impl OutputFormat {
+    pub fn to_str(&self) -> &str {
+        match self {
+            OutputFormat::Wat => "wat",
+            OutputFormat::Wasm => "wasm",
+            OutputFormat::Js => "js",
+        }
+    }
+}
+
+#[derive(
+    Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, ValueEnum, Serialize, Deserialize, Default,
+)]
+pub enum SurfaceTarget {
+    Wasm,
+    #[default]
+    WasmGC,
+    Js,
+    All,
+}
+
+pub fn lower_surface_targets(st: &[SurfaceTarget]) -> Vec<TargetBackend> {
+    let mut result = std::collections::HashSet::new();
+    for item in st {
+        match item {
+            SurfaceTarget::Wasm => {
+                result.insert(TargetBackend::Wasm);
+            }
+            SurfaceTarget::WasmGC => {
+                result.insert(TargetBackend::WasmGC);
+            }
+            SurfaceTarget::Js => {
+                result.insert(TargetBackend::Js);
+            }
+            SurfaceTarget::All => {
+                result.insert(TargetBackend::Wasm);
+                result.insert(TargetBackend::WasmGC);
+                result.insert(TargetBackend::Js);
+            }
+        }
+    }
+    let mut result: Vec<TargetBackend> = result.into_iter().collect();
+    result.sort();
+    result
+}
+
+#[rustfmt::skip]
+#[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, ValueEnum, Serialize, Deserialize, Default, Hash)]
+#[repr(u8)]
+pub enum TargetBackend {
+    Wasm,
+    #[default]
+    WasmGC,
+    Js,
+}
+
+impl TargetBackend {
+    pub fn to_flag(self) -> &'static str {
+        match self {
+            Self::Wasm => "wasm",
+            Self::WasmGC => "wasm-gc",
+            Self::Js => "js",
+        }
+    }
+
+    pub fn to_extension(self) -> &'static str {
+        match self {
+            Self::Wasm => "wasm",
+            Self::WasmGC => "wasm",
+            Self::Js => "js",
+        }
+    }
+
+    pub fn to_dir_name(self) -> &'static str {
+        match self {
+            Self::Wasm => "wasm",
+            Self::WasmGC => "wasm-gc",
+            Self::Js => "js",
+        }
+    }
+
+    pub fn to_backend_ext(self) -> &'static str {
+        match self {
+            Self::Wasm => "wasm",
+            Self::WasmGC => "wasm-gc",
+            Self::Js => "js",
+        }
+    }
+}
+
+impl FromStr for TargetBackend {
+    type Err = &'static str;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        match s {
+            "wasm" => Ok(Self::Wasm),
+            "wasm-gc" => Ok(Self::WasmGC),
+            "js" => Ok(Self::Js),
+            _ => Err("invalid target backend"),
+        }
+    }
+}
+
+pub fn is_slash(c: char) -> bool {
+    c == '/' || c == '\\'
+}
+
+#[derive(Debug, Clone)]
+pub struct BuildPackageFlags {
+    pub debug_flag: bool,
+    pub source_map: bool,
+    pub enable_coverage: bool,
+    // key: package name, value: warn_list for this package
+    pub warn_lists: HashMap<String, Option<String>>,
+    pub alert_lists: HashMap<String, Option<String>>,
+    // treat all warnings as errors
+    pub deny_warn: bool,
+    pub target_backend: TargetBackend,
+}
+
+impl Default for BuildPackageFlags {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+impl BuildPackageFlags {
+    pub fn new() -> Self {
+        Self {
+            debug_flag: false,
+            source_map: false,
+            enable_coverage: false,
+            warn_lists: HashMap::new(),
+            alert_lists: HashMap::new(),
+            deny_warn: false,
+            target_backend: TargetBackend::default(),
+        }
+    }
+}
+
+#[derive(Debug, Clone, Copy)]
+pub struct LinkCoreFlags {
+    pub debug_flag: bool,
+    pub source_map: bool,
+    pub output_format: OutputFormat,
+    pub target_backend: TargetBackend,
+}
+
+impl Default for LinkCoreFlags {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+impl LinkCoreFlags {
+    pub fn new() -> Self {
+        Self {
+            debug_flag: false,
+            source_map: false,
+            output_format: OutputFormat::Wasm,
+            target_backend: TargetBackend::default(),
+        }
+    }
+}
+
+#[derive(Debug, Clone, Default)]
+pub struct MoonbuildOpt {
+    pub source_dir: PathBuf,
+    pub target_dir: PathBuf,
+    pub test_opt: Option<TestOpt>,
+    pub sort_input: bool,
+    pub run_mode: RunMode,
+    pub fmt_opt: Option<FmtOpt>,
+    pub args: Vec<String>,
+    pub verbose: bool,
+    pub quiet: bool,
+}
+
+#[derive(Debug, Clone, Default)]
+pub struct TestOpt {
+    pub filter_package: Option<HashSet<PathBuf>>,
+    pub filter_file: Option<String>,
+    pub filter_index: Option<u32>,
+}
+
+impl TestOpt {
+    pub fn to_command(&self) -> Vec<String> {
+        let mut command_str = Vec::new();
+        if let Some(filter_package) = &self.filter_package {
+            command_str.push("--package".into());
+            filter_package.iter().for_each(|pkg| {
+                command_str.push(pkg.display().to_string());
+            });
+        }
+        if let Some(filter_file) = &self.filter_file {
+            command_str.push("--file".into());
+            command_str.push(filter_file.into());
+        }
+        if let Some(filter_index) = self.filter_index {
+            command_str.push("--index".into());
+            command_str.push(filter_index.to_string());
+        }
+        command_str
+    }
+}
+
+#[derive(Debug, Clone, Default)]
+pub struct FmtOpt {
+    pub check: bool,
+}
+
+#[derive(Debug, Clone)]
+pub struct MooncOpt {
+    pub build_opt: BuildPackageFlags,
+    pub link_opt: LinkCoreFlags,
+    pub extra_build_opt: Vec<String>,
+    pub extra_link_opt: Vec<String>,
+    pub nostd: bool,
+    pub render: bool,
+}
+
+impl Default for MooncOpt {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+impl MooncOpt {
+    pub fn new() -> Self {
+        Self {
+            build_opt: BuildPackageFlags::new(),
+            link_opt: LinkCoreFlags::new(),
+            extra_build_opt: vec![],
+            extra_link_opt: vec![],
+            nostd: false,
+            render: false,
+        }
+    }
+}
+
+pub const DEP_PATH: &str = ".mooncakes";
+
+pub const IGNORE_DIRS: &[&str] = &["target", ".git", DEP_PATH];
+
+pub fn dialoguer_ctrlc_handler() {
+    // Fix cursor disappears after ctrc+c
+    // https://github.com/console-rs/dialoguer/issues/77
+    let term = dialoguer::console::Term::stdout();
+    let _ = term.show_cursor();
+    std::process::exit(1);
+}
+
+#[derive(Debug, serde::Serialize, serde::Deserialize)]
+pub struct VersionItems {
+    pub items: Vec<VersionItem>,
+}
+
+#[derive(Debug, serde::Serialize, serde::Deserialize)]
+pub struct VersionItem {
+    pub name: String,
+    pub version: String,
+    pub path: Option<String>,
+}
+
+// Copy from https://github.com/rust-lang/cargo/blob/e52e360/crates/cargo-test-support/src/paths.rs#L113
+pub trait CargoPathExt {
+    fn rm_rf(&self);
+    fn mkdir_p(&self);
+
+    /// Returns a list of all files and directories underneath the given
+    /// directory, recursively, including the starting path.
+    fn ls_r(&self) -> Vec<PathBuf>;
+}
+
+impl CargoPathExt for Path {
+    fn rm_rf(&self) {
+        let meta = match self.symlink_metadata() {
+            Ok(meta) => meta,
+            Err(e) => {
+                if e.kind() == ErrorKind::NotFound {
+                    return;
+                }
+                panic!("failed to remove {:?}, could not read: {:?}", self, e);
+            }
+        };
+        // There is a race condition between fetching the metadata and
+        // actually performing the removal, but we don't care all that much
+        // for our tests.
+        if meta.is_dir() {
+            if let Err(e) = fs::remove_dir_all(self) {
+                panic!("failed to remove {:?}: {:?}", self, e)
+            }
+        } else if let Err(e) = fs::remove_file(self) {
+            panic!("failed to remove {:?}: {:?}", self, e)
+        }
+    }
+
+    fn mkdir_p(&self) {
+        fs::create_dir_all(self)
+            .unwrap_or_else(|e| panic!("failed to mkdir_p {}: {}", self.display(), e))
+    }
+
+    fn ls_r(&self) -> Vec<PathBuf> {
+        walkdir::WalkDir::new(self)
+            .sort_by_file_name()
+            .into_iter()
+            .filter_map(|e| e.map(|e| e.path().to_owned()).ok())
+            .collect()
+    }
+}
+
+pub fn get_src_dst_dir(matches: &clap::ArgMatches) -> anyhow::Result<(PathBuf, PathBuf)> {
+    let default_source_dir = dunce::canonicalize(PathBuf::from(".")).unwrap();
+    let source_dir = matches
+        .get_one::<PathBuf>("source-dir")
+        .unwrap_or(&default_source_dir);
+    let default_target_dir = source_dir.join("target");
+
+    if !check_moon_mod_exists(source_dir) {
+        bail!("could not find `{}`", MOON_MOD_JSON);
+    }
+
+    let target_dir = matches
+        .get_one::<PathBuf>("target-dir")
+        .unwrap_or(&default_target_dir);
+    if !target_dir.exists() {
+        std::fs::create_dir_all(target_dir).context("failed to create target directory")?;
+    }
+
+    let target_dir = dunce::canonicalize(target_dir).context("failed to set target directory")?;
+    Ok((source_dir.into(), target_dir))
+}
+
+#[derive(Debug, Clone, PartialEq, Eq, Copy, Default)]
+pub enum RunMode {
+    #[default]
+    Build,
+    Check,
+    Run,
+    Test,
+    Bundle,
+    Format,
+}
+
+impl RunMode {
+    pub fn to_dir_name(self) -> &'static str {
+        match self {
+            Self::Build | Self::Run => "build",
+            Self::Check => "check",
+            Self::Test => "test",
+            Self::Bundle => "bundle",
+            Self::Format => "format",
+        }
+    }
+}
+
+pub fn backend_filter(files: &[PathBuf], backend: TargetBackend) -> Vec<std::path::PathBuf> {
+    files
+        .iter()
+        .filter(|f| {
+            let stem = f.file_stem().unwrap().to_str().unwrap();
+            let dot = stem.rfind('.');
+            match dot {
+                None => true,
+                Some(idx) => {
+                    let (_, backend_ext) = stem.split_at(idx + 1);
+                    backend_ext == backend.to_backend_ext()
+                }
+            }
+        })
+        .cloned()
+        .collect()
+}
+
+#[test]
+fn test_backend_filter() {
+    use expect_test::expect;
+
+    let files = [
+        PathBuf::from("a.mbt"),
+        PathBuf::from("a_test.mbt"),
+        PathBuf::from("b.mbt"),
+        PathBuf::from("b_test.mbt"),
+        PathBuf::from("x.js.mbt"),
+        PathBuf::from("x_test.js.mbt"),
+        PathBuf::from("x.wasm.mbt"),
+        PathBuf::from("x_test.wasm.mbt"),
+        PathBuf::from("x.wasm-gc.mbt"),
+        PathBuf::from("x_test.wasm-gc.mbt"),
+    ];
+
+    expect![[r#"
+        [
+            "a.mbt",
+            "a_test.mbt",
+            "b.mbt",
+            "b_test.mbt",
+            "x.js.mbt",
+            "x_test.js.mbt",
+        ]
+    "#]]
+    .assert_debug_eq(&backend_filter(&files, TargetBackend::Js));
+    expect![[r#"
+        [
+            "a.mbt",
+            "a_test.mbt",
+            "b.mbt",
+            "b_test.mbt",
+            "x.wasm.mbt",
+            "x_test.wasm.mbt",
+        ]
+    "#]]
+    .assert_debug_eq(&backend_filter(&files, TargetBackend::Wasm));
+    expect![[r#"
+        [
+            "a.mbt",
+            "a_test.mbt",
+            "b.mbt",
+            "b_test.mbt",
+            "x.wasm-gc.mbt",
+            "x_test.wasm-gc.mbt",
+        ]
+    "#]]
+    .assert_debug_eq(&backend_filter(&files, TargetBackend::WasmGC));
+}
+
+pub fn get_cargo_pkg_version() -> String {
+    env!("CARGO_PKG_VERSION").into()
+}
+
+pub fn get_moon_version() -> String {
+    format!(
+        "{} ({} {})",
+        env!("CARGO_PKG_VERSION"),
+        env!("VERGEN_GIT_SHA"),
+        std::env!("VERGEN_BUILD_DATE")
+    )
+}
+
+pub fn get_moonc_version() -> String {
+    let output = std::process::Command::new("moonc").arg("-v").output();
+    if let Ok(output) = &output {
+        if output.status.success() {
+            return std::str::from_utf8(&output.stdout)
+                .unwrap()
+                .trim()
+                .to_string();
+        }
+    }
+    println!("{}: failed to get moonc version", "error".red().bold());
+    std::process::exit(1);
+}
+
+pub fn get_moonrun_version() -> String {
+    let output = std::process::Command::new("moonrun")
+        .arg("--version")
+        .output();
+    if let Ok(output) = &output {
+        if output.status.success() {
+            return std::str::from_utf8(&output.stdout)
+                .unwrap()
+                .trim()
+                .to_string();
+        }
+    }
+    println!("{}: failed to get moonrun version", "error".red().bold());
+    std::process::exit(1);
+}
+
+#[test]
+fn test_get_version() {
+    let v = get_moon_version();
+    println!("moon_version: {}", v);
+    assert!(!v.is_empty());
+    let v = get_moonc_version();
+    println!("moonc_version: {}", v);
+    assert!(!v.is_empty());
+}
+
+pub struct FileLock {
+    _file: std::fs::File,
+}
+
+impl FileLock {
+    pub fn lock(path: &std::path::Path) -> std::io::Result<Self> {
+        let file = match std::fs::File::create(path.join(MOON_LOCK)) {
+            Ok(f) => f,
+            Err(e) => return Err(e),
+        };
+        match file.try_lock_exclusive() {
+            Ok(_) => Ok(FileLock { _file: file }),
+            Err(_) => {
+                println!("Blocking waiting for file lock ...");
+                // Move console cursor up by one line to overprint the above tip
+                print!("\x1b[1A");
+                file.lock_exclusive()
+                    .map_err(|e| std::io::Error::new(e.kind(), "failed to lock target dir"))?;
+                Ok(FileLock { _file: file })
+            }
+        }
+    }
+}
+
+#[derive(Debug, Clone)]
+pub enum GeneratedTestDriver {
+    InternalTest(PathBuf),
+    UnderscoreTest(PathBuf),
+    BlackboxTest(PathBuf),
+}
diff --git a/crates/moonutil/src/dependency.rs b/crates/moonutil/src/dependency.rs
new file mode 100644
index 00000000..16454f96
--- /dev/null
+++ b/crates/moonutil/src/dependency.rs
@@ -0,0 +1,119 @@
+//! Dependency info requires a detour to support both string and structured formats
+
+use std::str::FromStr;
+
+use semver::VersionReq;
+use serde::{Deserialize, Serialize, Serializer};
+
+/// Information about a specific dependency
+#[derive(Clone, Serialize, Deserialize, Default)]
+pub struct DependencyInfo {
+    #[serde(serialize_with = "serialize_version_req")]
+    #[serde(default, skip_serializing_if = "version_is_default")]
+    pub version: VersionReq,
+    // Other optional fields...
+    /// Local path to the dependency. Overrides the version requirement.
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub path: Option<String>,
+    /// Git repository URL. Overrides the version requirement.
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub git: Option<String>,
+    /// Git branch to use.
+    #[serde(skip_serializing_if = "Option::is_none", rename = "branch")]
+    pub git_branch: Option<String>,
+}
+
+fn version_is_default(version: &VersionReq) -> bool {
+    version.comparators.is_empty()
+}
+
+impl std::fmt::Debug for DependencyInfo {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        if self.is_simple() {
+            write!(f, "{}", self.version)
+        } else {
+            f.debug_struct("DependencyInfo")
+                .field("version", &format_args!("{}", self.version))
+                .finish()
+        }
+    }
+}
+
+/// The JSON representation of a dependency info
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(untagged)]
+pub enum DependencyInfoJson {
+    /// A simple version requirement
+    Simple(#[serde(serialize_with = "serialize_version_req")] VersionReq),
+    /// A detailed dependency info
+    Detailed(DependencyInfo),
+}
+
+impl DependencyInfo {
+    /// Check if the requirement is simple. That is, it only contains a version requirement
+    fn is_simple(&self) -> bool {
+        self.path.is_none() && self.git.is_none() && self.git_branch.is_none()
+    }
+
+    #[allow(clippy::needless_update)] // More fields will be added later
+    fn from_simple(version: VersionReq) -> Self {
+        Self {
+            version,
+            ..Default::default()
+        }
+    }
+}
+
+impl From<DependencyInfo> for DependencyInfoJson {
+    fn from(dep: DependencyInfo) -> Self {
+        if dep.is_simple() {
+            DependencyInfoJson::Simple(dep.version)
+        } else {
+            DependencyInfoJson::Detailed(dep)
+        }
+    }
+}
+
+impl From<DependencyInfoJson> for DependencyInfo {
+    fn from(dep: DependencyInfoJson) -> Self {
+        match dep {
+            DependencyInfoJson::Simple(v) => DependencyInfo::from_simple(v),
+            DependencyInfoJson::Detailed(d) => d,
+        }
+    }
+}
+
+fn serialize_version_req<S: Serializer>(v: &VersionReq, s: S) -> Result<S::Ok, S::Error> {
+    if v.comparators.len() == 1 && v.comparators[0].op == semver::Op::Caret {
+        // Format `^a.b.c` as `a.b.c`
+        s.collect_str(&ComparatorFormatWrapper(&v.comparators[0]))
+    } else {
+        v.serialize(s)
+    }
+}
+
+struct ComparatorFormatWrapper<'a>(&'a semver::Comparator);
+
+impl<'a> std::fmt::Display for ComparatorFormatWrapper<'a> {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "{}", self.0.major)?;
+        if let Some(minor) = &self.0.minor {
+            write!(f, ".{}", minor)?;
+            if let Some(patch) = &self.0.patch {
+                write!(f, ".{}", patch)?;
+                if !self.0.pre.is_empty() {
+                    write!(f, "-{}", self.0.pre)?;
+                }
+            }
+        }
+        Ok(())
+    }
+}
+
+impl FromStr for DependencyInfo {
+    type Err = semver::Error;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        Ok(DependencyInfo::from_simple(VersionReq::parse(s)?))
+    }
+}
diff --git a/crates/moonutil/src/dirs.rs b/crates/moonutil/src/dirs.rs
new file mode 100644
index 00000000..8c95e7fd
--- /dev/null
+++ b/crates/moonutil/src/dirs.rs
@@ -0,0 +1,272 @@
+use std::{
+    collections::{hash_map::DefaultHasher, HashSet},
+    fs::{self, File},
+    hash::Hasher,
+    io::{Read, Write},
+    path::{Path, PathBuf},
+};
+
+use anyhow::Context;
+use serde::{Deserialize, Serialize};
+
+use crate::common::{
+    get_moon_version, get_moonc_version, MooncOpt, RunMode, IGNORE_DIRS, MOON_MOD_JSON,
+    MOON_PID_NAME, MOON_PKG_JSON,
+};
+
+#[derive(Debug, clap::Parser, Serialize, Deserialize, Clone)]
+pub struct SourceTargetDirs {
+    /// The source code directory. Defaults to the current directory.
+    #[arg(long, global = true)]
+    source_dir: Option<PathBuf>,
+
+    /// The target directory. Defaults to `source_dir/target`.
+    #[clap(long, global = true)]
+    target_dir: Option<PathBuf>,
+}
+
+impl SourceTargetDirs {
+    pub fn try_into_package_dirs(&self) -> anyhow::Result<PackageDirs> {
+        PackageDirs::try_from(self)
+    }
+}
+
+pub struct PackageDirs {
+    pub source_dir: PathBuf,
+    pub target_dir: PathBuf,
+}
+
+pub fn check_moon_pkg_exist(dir: &Path) -> bool {
+    dir.join(MOON_PKG_JSON).exists()
+}
+
+pub fn check_moon_mod_exists(source_dir: &Path) -> bool {
+    source_dir.join(MOON_MOD_JSON).exists()
+}
+
+fn find_ancestor_with_mod(source_dir: &Path) -> Option<PathBuf> {
+    source_dir
+        .ancestors()
+        .find(|dir| check_moon_mod_exists(dir))
+        .map(|p| p.to_path_buf())
+}
+
+fn get_src_dst_dir(matches: &SourceTargetDirs) -> anyhow::Result<PackageDirs> {
+    let source_dir = match matches.source_dir.clone() {
+        Some(v) => v,
+        None => std::env::current_dir().context("failed to get current directory")?,
+    };
+    let source_dir = dunce::canonicalize(source_dir).context("failed to set source directory")?;
+    let source_dir = find_ancestor_with_mod(&source_dir).ok_or_else(|| {
+        anyhow::anyhow!(
+            "could not find a moon.mod.json file in the source directory or its ancestors"
+        )
+    })?;
+
+    let target_dir = matches
+        .target_dir
+        .clone()
+        .unwrap_or_else(|| source_dir.join("target"));
+    if !target_dir.exists() {
+        std::fs::create_dir_all(&target_dir).context("failed to create target directory")?;
+    }
+    let target_dir = dunce::canonicalize(target_dir).context("failed to set target directory")?;
+
+    Ok(PackageDirs {
+        source_dir,
+        target_dir,
+    })
+}
+
+impl TryFrom<&SourceTargetDirs> for PackageDirs {
+    type Error = anyhow::Error;
+
+    fn try_from(matches: &SourceTargetDirs) -> Result<Self, Self::Error> {
+        get_src_dst_dir(matches)
+    }
+}
+
+pub fn mk_arch_mode_dir(
+    source_dir: &Path,
+    target_dir: &Path,
+    moonc_opt: &MooncOpt,
+    mode: RunMode,
+) -> anyhow::Result<PathBuf> {
+    let arch_dir = target_dir.join(moonc_opt.link_opt.target_backend.to_dir_name());
+    let arch_mode_dir = if moonc_opt.build_opt.debug_flag {
+        arch_dir.join("debug")
+    } else {
+        arch_dir.join("release")
+    };
+    if !arch_mode_dir.exists() {
+        std::fs::create_dir_all(&arch_mode_dir)
+            .context(format!("failed to create directory {:?}", arch_mode_dir))?;
+    }
+
+    if !has_moon_db(&arch_mode_dir) {
+        create_moon_db(source_dir, &arch_mode_dir)?;
+    } else if need_rebuild(source_dir, &arch_mode_dir) {
+        recreate_moon_db(source_dir, &arch_mode_dir)?;
+        clean_dir_in_target(&arch_mode_dir)?;
+    }
+
+    let arch_mode_dir = arch_mode_dir.join(mode.to_dir_name());
+
+    if !arch_mode_dir.exists() {
+        std::fs::create_dir_all(&arch_mode_dir).expect("Failed to create target directory");
+    }
+
+    Ok(arch_mode_dir)
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+struct FileHash {
+    path: String,
+    hash: u64,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+struct Fingerprint {
+    moon_version: String,
+    moonc_version: String,
+    moon_pkgs: Vec<FileHash>,
+    mbt_files: HashSet<String>,
+}
+
+fn hash_file(path: &str) -> u64 {
+    let mut file = File::open(path).unwrap();
+    let mut hasher = DefaultHasher::new();
+    let mut buffer = [0; 1024];
+
+    loop {
+        let count = file.read(&mut buffer).unwrap();
+        if count == 0 {
+            break;
+        }
+        hasher.write(&buffer[..count]);
+    }
+    hasher.finish()
+}
+
+fn _get_fingerprint(moon_files: &[String], pkg_files: &[String]) -> Fingerprint {
+    let mut fingerprint = Fingerprint {
+        moon_version: get_moon_version(),
+        moonc_version: get_moonc_version(),
+        moon_pkgs: vec![],
+        mbt_files: HashSet::new(),
+    };
+    for file in moon_files {
+        fingerprint.mbt_files.insert(file.clone());
+    }
+    for file in pkg_files {
+        fingerprint.moon_pkgs.push(FileHash {
+            path: file.clone(),
+            hash: hash_file(file),
+        })
+    }
+    fingerprint
+}
+
+fn get_project_files(
+    dir: &Path,
+    pkg_files: &mut Vec<String>,
+    mbt_files: &mut Vec<String>,
+    root: bool,
+) -> anyhow::Result<()> {
+    for entry in fs::read_dir(dir)? {
+        let entry = entry?;
+        let path = entry.path();
+        if path.is_dir() {
+            if root && IGNORE_DIRS.contains(&path.file_name().unwrap().to_str().unwrap()) {
+                continue;
+            }
+            get_project_files(&path, pkg_files, mbt_files, false)?;
+        } else if let Some(extension) = path.extension() {
+            if let Some(filename) = path.file_name() {
+                if extension == "mbt" {
+                    mbt_files.push(path.display().to_string());
+                } else if filename == MOON_PKG_JSON {
+                    pkg_files.push(path.display().to_string())
+                }
+            }
+        }
+    }
+    Ok(())
+}
+
+pub fn clean_dir_in_target(target_dir: &Path) -> anyhow::Result<()> {
+    let d = target_dir;
+    if d.exists() {
+        for entry in std::fs::read_dir(d)? {
+            let entry = entry?;
+            let path = entry.path();
+            if path.is_file()
+                && path.file_name().and_then(|name| name.to_str()) != Some(MOON_PID_NAME)
+            {
+                fs::remove_file(path)?;
+            } else if path.is_dir() {
+                fs::remove_dir_all(path)?;
+            }
+        }
+    }
+    Ok(())
+}
+
+pub fn has_moon_db(target_dir: &Path) -> bool {
+    let moon_db = target_dir.join("moon.db");
+    moon_db.exists()
+}
+
+pub fn recreate_moon_db(source_dir: &Path, target_dir: &Path) -> anyhow::Result<()> {
+    let moon_db = target_dir.join("moon.db");
+    let _ = std::fs::remove_file(moon_db);
+    create_moon_db(source_dir, target_dir)
+}
+
+fn get_fingerprint(source_dir: &Path) -> Fingerprint {
+    let mut pkg_files = vec![];
+    let mut mbt_files = vec![];
+    get_project_files(source_dir, &mut pkg_files, &mut mbt_files, true).unwrap();
+    _get_fingerprint(&mbt_files, &pkg_files)
+}
+
+pub fn create_moon_db(source_dir: &Path, target_dir: &Path) -> anyhow::Result<()> {
+    let moon_db = target_dir.join("moon.db");
+    let fp = std::fs::File::create(moon_db).context("failed to create `moon.db`")?;
+    let mut writer = std::io::BufWriter::new(fp);
+    let finger = get_fingerprint(source_dir);
+    let data = bincode::serialize(&finger).unwrap();
+    writer.write_all(&data)?;
+    Ok(())
+}
+
+fn load_moon_db(target_dir: &Path) -> anyhow::Result<Fingerprint> {
+    let moon_db = target_dir.join("moon.db");
+    let fp = std::fs::File::open(moon_db)?;
+    let mut reader = std::io::BufReader::new(fp);
+    let mut buf = vec![];
+    reader.read_to_end(&mut buf)?;
+    let _ = reader.read(&mut buf)?;
+    let finger: Fingerprint = bincode::deserialize(&buf)?;
+    Ok(finger)
+}
+
+fn files_hash_equal(lhs: &[FileHash], rhs: &[FileHash]) -> bool {
+    let st1 = lhs.iter().map(|f| f.hash).collect::<HashSet<u64>>();
+    let st2 = rhs.iter().map(|f| f.hash).collect::<HashSet<u64>>();
+    st1 == st2
+}
+
+pub fn need_rebuild(source_dir: &Path, target_dir: &Path) -> bool {
+    let old_fingerprint = load_moon_db(target_dir);
+    if old_fingerprint.is_err() {
+        return true;
+    }
+    let old_fingerprint = old_fingerprint.unwrap();
+    let cur_fingerprint = get_fingerprint(source_dir);
+
+    !(old_fingerprint.moon_version == cur_fingerprint.moon_version
+        && old_fingerprint.moonc_version == cur_fingerprint.moonc_version
+        && old_fingerprint.mbt_files == cur_fingerprint.mbt_files
+        && files_hash_equal(&old_fingerprint.moon_pkgs, &cur_fingerprint.moon_pkgs))
+}
diff --git a/crates/moonutil/src/graph.rs b/crates/moonutil/src/graph.rs
new file mode 100644
index 00000000..2e6552e3
--- /dev/null
+++ b/crates/moonutil/src/graph.rs
@@ -0,0 +1,41 @@
+use petgraph::graph::NodeIndex;
+
+pub fn get_example_cycle(
+    m: &petgraph::graph::DiGraph<String, usize>,
+    n: petgraph::prelude::NodeIndex,
+) -> Vec<petgraph::prelude::NodeIndex> {
+    // the parent of each node in the spanning tree
+    let mut spanning_tree = vec![NodeIndex::default(); m.capacity().0];
+    // we find a cycle via dfs from our starting point
+    let res = petgraph::visit::depth_first_search(&m, [n], |ev| match ev {
+        petgraph::visit::DfsEvent::TreeEdge(parent, n) => {
+            spanning_tree[n.index()] = parent;
+            petgraph::visit::Control::Continue
+        }
+        petgraph::visit::DfsEvent::BackEdge(u, v) => {
+            if v == n {
+                // Cycle found! Bail out of the search.
+                petgraph::visit::Control::Break(u)
+            } else {
+                // This is not the cycle we are looking for.
+                petgraph::visit::Control::Continue
+            }
+        }
+        _ => {
+            // Continue the search.
+            petgraph::visit::Control::Continue
+        }
+    });
+    let res = res.break_value().expect("The cycle should be found");
+    let mut cycle = vec![n];
+    let mut curr_node = res;
+    loop {
+        cycle.push(curr_node);
+        if curr_node == n {
+            break;
+        }
+        curr_node = spanning_tree[curr_node.index()]; // get parent
+    }
+    cycle.reverse(); // the cycle was pushed in reverse order
+    cycle
+}
diff --git a/crates/moonutil/src/lib.rs b/crates/moonutil/src/lib.rs
new file mode 100644
index 00000000..ce6f01ed
--- /dev/null
+++ b/crates/moonutil/src/lib.rs
@@ -0,0 +1,14 @@
+pub mod cli;
+pub mod common;
+pub mod dependency;
+pub mod dirs;
+pub mod graph;
+pub mod module;
+pub mod moon_dir;
+pub mod mooncake_bin;
+pub mod mooncakes;
+pub mod package;
+pub mod path;
+pub mod render;
+pub mod scan;
+pub mod version;
diff --git a/crates/moonutil/src/module.rs b/crates/moonutil/src/module.rs
new file mode 100644
index 00000000..16ea94f3
--- /dev/null
+++ b/crates/moonutil/src/module.rs
@@ -0,0 +1,398 @@
+use crate::common::MooncOpt;
+use crate::common::MOON_PKG_JSON;
+use crate::dependency::{DependencyInfo, DependencyInfoJson};
+use crate::package::{AliasJSON, Package, PackageJSON};
+use crate::path::ImportPath;
+use anyhow::bail;
+use indexmap::map::IndexMap;
+use petgraph::graph::DiGraph;
+use semver::Version;
+use serde::{Deserialize, Serialize};
+use std::collections::HashSet;
+use std::fmt::Debug;
+use std::path::{Path, PathBuf};
+
+#[derive(Debug, Clone)]
+pub struct ModuleDB {
+    pub source_dir: PathBuf,
+    pub name: String,
+    pub packages: IndexMap<String, Package>,
+    pub entries: Vec<usize>, // index of entry packages
+    pub deps: Vec<String>,
+    pub graph: DiGraph<String, usize>,
+    pub backend: String,
+}
+
+impl ModuleDB {
+    pub fn make_pkg_import_path(&self, pkg_idx: usize) -> String {
+        let pkg = &self.packages[pkg_idx];
+
+        let p = ImportPath {
+            module_name: self.name.clone(),
+            rel_path: pkg.rel.clone(),
+            is_3rd: false,
+        };
+
+        p.make_full_path()
+    }
+
+    pub fn get_package_dir(&self, index: usize) -> PathBuf {
+        self.source_dir
+            .join(self.packages[index].rel.fs_full_name())
+    }
+
+    pub fn make_pkg_core_path(&self, target_dir: &Path, pkg_full_name: &str) -> PathBuf {
+        let pkg = &self.packages[pkg_full_name];
+        target_dir
+            .join(pkg.rel.fs_full_name())
+            .join(format!("{}.core", pkg.rel.short_name()))
+    }
+
+    pub fn make_pkg_mi_path(&self, target_dir: &Path, pkg_idx: usize) -> PathBuf {
+        let pkg = &self.packages[pkg_idx];
+        target_dir
+            .join(pkg.rel.fs_full_name())
+            .join(format!("{}.mi", pkg.rel.short_name()))
+    }
+
+    pub fn get_pkg_mi_deps(&self, target_dir: &Path, pkg_idx: usize) -> Vec<String> {
+        let mut deps: Vec<String> = vec![];
+        let pkg = &self.packages[pkg_idx];
+        for dep in pkg.imports.iter() {
+            let mi_path = target_dir
+                .join(dep.path.make_rel_path())
+                .join(format!("{}.mi", dep.path.rel_path.short_name()));
+
+            deps.push(mi_path.display().to_string());
+        }
+        deps
+    }
+
+    pub fn get_pkg_mi_deps_with_alias(&self, target_dir: &Path, pkg_idx: usize) -> Vec<String> {
+        let mut deps: Vec<String> = vec![];
+        let pkg = &self.packages[pkg_idx];
+        for dep in pkg.imports.iter() {
+            let alias = if let Some(a) = &dep.alias {
+                a.clone()
+            } else {
+                dep.path.rel_path.short_name().into()
+            };
+            let mi_path = target_dir
+                .join(dep.path.make_rel_path())
+                .join(format!("{}.mi", dep.path.rel_path.short_name()));
+
+            deps.push(format!("{}:{}", mi_path.display(), alias));
+        }
+        deps
+    }
+
+    pub fn make_output_path(
+        &self,
+        target_dir: &Path,
+        pkg_idx: usize,
+        moonc_opt: &MooncOpt,
+    ) -> PathBuf {
+        let pkg = &self.packages[pkg_idx];
+        target_dir.join(pkg.rel.fs_full_name()).join(format!(
+            "{}.{}",
+            pkg.rel.short_name(),
+            moonc_opt.link_opt.output_format.to_str()
+        ))
+    }
+
+    fn get_core_dep_rec(
+        &self,
+        visited: &mut HashSet<String>,
+        target_dir: &Path,
+        pkg_full_name: &str,
+        cores: &mut Vec<PathBuf>,
+    ) {
+        if visited.contains(pkg_full_name) {
+            return;
+        }
+        visited.insert(pkg_full_name.into());
+        let c = self.make_pkg_core_path(target_dir, pkg_full_name);
+        cores.push(c);
+        let pkg = &self.packages[pkg_full_name];
+        for d in pkg.imports.iter() {
+            let pkgname = d.path.make_full_path();
+            if self.packages.contains_key(&pkgname) {
+                self.get_core_dep_rec(visited, target_dir, &pkgname, cores);
+            }
+        }
+    }
+
+    pub fn get_all_dep_cores(&self, target_dir: &Path, pkg_full_name: &str) -> Vec<PathBuf> {
+        let mut cores = vec![];
+        let mut visited = HashSet::<String>::new();
+        self.get_core_dep_rec(&mut visited, target_dir, pkg_full_name, &mut cores);
+        cores.sort();
+        cores.dedup();
+        cores
+    }
+}
+
+impl ModuleDB {
+    pub fn validate(&self) -> anyhow::Result<()> {
+        let mut errors = vec![];
+        for (_, pkg) in &self.packages {
+            for item in pkg
+                .imports
+                .iter()
+                .chain(pkg.wbtest_imports.iter())
+                .chain(pkg.test_imports.iter())
+            {
+                let imported = item.path.make_full_path();
+                if !pkg.full_components().can_import(&item.full_components()) {
+                    errors.push(format!(
+                        "{}: cannot import internal package `{}` in `{}`",
+                        self.source_dir
+                            .join(pkg.rel.fs_full_name())
+                            .join(MOON_PKG_JSON)
+                            .display(),
+                        imported,
+                        pkg.full_name()
+                    ))
+                }
+                if !self.packages.contains_key(&imported) {
+                    errors.push(format!(
+                        "{}: cannot import `{}` in `{}`, no such package",
+                        self.source_dir
+                            .join(pkg.rel.fs_full_name())
+                            .join(MOON_PKG_JSON)
+                            .display(),
+                        imported,
+                        pkg.full_name(),
+                    ));
+                }
+            }
+        }
+        if !errors.is_empty() {
+            bail!("{}", errors.join("\n"));
+        }
+        Ok(())
+    }
+}
+
+#[derive(Debug, Serialize, Deserialize, PartialEq)]
+pub struct ModuleDBJSON {
+    pub source_dir: String,
+    pub name: String,
+    pub packages: Vec<PackageJSON>,
+    pub deps: Vec<String>,
+    pub backend: String,
+}
+
+pub fn convert_mdb_to_json(module: &ModuleDB) -> ModuleDBJSON {
+    let mut pkgs = vec![];
+    for (_, pkg) in &module.packages {
+        let files = pkg.files.iter().map(|f| f.display().to_string()).collect();
+        let wbtest_files = pkg
+            .wbtest_files
+            .iter()
+            .map(|f| f.display().to_string())
+            .collect();
+        let test_files = pkg
+            .test_files
+            .iter()
+            .map(|f| f.display().to_string())
+            .collect();
+        let mut deps = vec![];
+        for dep in &pkg.imports {
+            let alias = match &dep.alias {
+                None => {
+                    let alias = dep.path.rel_path.components.last();
+                    match alias {
+                        None => dep.path.module_name.split('/').last().unwrap().to_string(),
+                        Some(x) => x.to_string(),
+                    }
+                }
+                Some(x) => x.to_string(),
+            };
+            deps.push(AliasJSON {
+                path: dep.path.make_full_path(),
+                alias,
+            });
+        }
+
+        let mut wbtest_deps = vec![];
+        for dep in &pkg.wbtest_imports {
+            let alias = match &dep.alias {
+                None => {
+                    let alias = dep.path.rel_path.components.last();
+                    match alias {
+                        None => dep.path.module_name.split('/').last().unwrap().to_string(),
+                        Some(x) => x.to_string(),
+                    }
+                }
+                Some(x) => x.to_string(),
+            };
+            wbtest_deps.push(AliasJSON {
+                path: dep.path.make_full_path(),
+                alias,
+            });
+        }
+
+        let mut test_deps = vec![];
+        for dep in &pkg.test_imports {
+            let alias = match &dep.alias {
+                None => {
+                    let alias = dep.path.rel_path.components.last();
+                    match alias {
+                        None => dep.path.module_name.split('/').last().unwrap().to_string(),
+                        Some(x) => x.to_string(),
+                    }
+                }
+                Some(x) => x.to_string(),
+            };
+            test_deps.push(AliasJSON {
+                path: dep.path.make_full_path(),
+                alias,
+            });
+        }
+
+        pkgs.push(PackageJSON {
+            is_main: pkg.is_main,
+            is_third_party: pkg.is_third_party,
+            root: pkg.root.full_name(),
+            rel: pkg.rel.full_name(),
+            files,
+            wbtest_files,
+            test_files,
+            deps,
+            wbtest_deps,
+            test_deps,
+            artifact: pkg
+                .artifact
+                .with_extension("mi")
+                .to_str()
+                .unwrap()
+                .to_string(),
+        })
+    }
+    let mut deps = vec![];
+    for dep in &module.deps {
+        deps.push(dep.clone());
+    }
+    ModuleDBJSON {
+        source_dir: module.source_dir.display().to_string(),
+        name: module.name.clone(),
+        packages: pkgs,
+        deps,
+        backend: module.backend.clone(),
+    }
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, Default)]
+pub struct MoonMod {
+    pub name: String,
+    pub version: Option<Version>,
+    pub deps: IndexMap<String, DependencyInfo>,
+    pub readme: Option<String>,
+    pub repository: Option<String>,
+    pub license: Option<String>,
+    pub keywords: Option<Vec<String>>,
+    pub description: Option<String>,
+
+    pub compile_flags: Option<Vec<String>>,
+    pub link_flags: Option<Vec<String>>,
+    pub checksum: Option<String>,
+
+    /// Fields not covered by the info above, which should be left as-is.
+    #[serde(flatten)]
+    pub ext: serde_json_lenient::Value,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct MoonModJSON {
+    pub name: String,
+
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub version: Option<Version>,
+
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub deps: Option<IndexMap<String, DependencyInfoJson>>,
+
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub readme: Option<String>,
+
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub repository: Option<String>,
+
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub license: Option<String>,
+
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub keywords: Option<Vec<String>>,
+
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub description: Option<String>,
+
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub compile_flags: Option<Vec<String>>,
+
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub link_flags: Option<Vec<String>>,
+
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub checksum: Option<String>,
+
+    /// Fields not covered by the info above, which should be left as-is.
+    #[serde(flatten)]
+    pub ext: serde_json_lenient::Value,
+}
+
+pub fn convert_mod_json_to_module(j: MoonModJSON) -> anyhow::Result<MoonMod> {
+    let deps = match j.deps {
+        None => IndexMap::new(),
+        Some(d) => d.into_iter().map(|(k, v)| (k, v.into())).collect(),
+    };
+
+    Ok(MoonMod {
+        name: j.name,
+        version: j.version,
+        deps,
+        readme: j.readme,
+        repository: j.repository,
+        license: j.license,
+        keywords: j.keywords,
+        description: j.description,
+
+        compile_flags: j.compile_flags,
+        link_flags: j.link_flags,
+        checksum: j.checksum,
+        ext: j.ext,
+    })
+}
+
+pub fn convert_module_to_mod_json(m: MoonMod) -> MoonModJSON {
+    MoonModJSON {
+        name: m.name,
+        version: m.version,
+        deps: Some(m.deps.into_iter().map(|(k, v)| (k, v.into())).collect()),
+        readme: m.readme,
+        repository: m.repository,
+        license: m.license,
+        keywords: m.keywords,
+        description: m.description,
+
+        compile_flags: m.compile_flags,
+        link_flags: m.link_flags,
+        checksum: m.checksum,
+        ext: m.ext,
+    }
+}
+
+impl TryFrom<MoonModJSON> for MoonMod {
+    type Error = anyhow::Error;
+
+    fn try_from(val: MoonModJSON) -> Result<Self, Self::Error> {
+        convert_mod_json_to_module(val)
+    }
+}
+
+impl From<MoonMod> for MoonModJSON {
+    fn from(val: MoonMod) -> Self {
+        convert_module_to_mod_json(val)
+    }
+}
diff --git a/crates/moonutil/src/moon_dir.rs b/crates/moonutil/src/moon_dir.rs
new file mode 100644
index 00000000..0ee3e21f
--- /dev/null
+++ b/crates/moonutil/src/moon_dir.rs
@@ -0,0 +1,131 @@
+use std::path::{Path, PathBuf};
+
+use crate::common::TargetBackend;
+
+pub fn home() -> PathBuf {
+    if let Ok(moon_home) = std::env::var("MOON_HOME") {
+        return PathBuf::from(moon_home);
+    }
+
+    let h = home::home_dir();
+    if h.is_none() {
+        eprintln!("Failed to get home directory");
+        std::process::exit(1);
+    }
+    let hm = h.unwrap().join(".moon");
+    if !hm.exists() {
+        std::fs::create_dir_all(&hm).unwrap();
+    }
+    hm
+}
+
+pub fn bin() -> PathBuf {
+    let bin = home().join("bin");
+    if !bin.exists() {
+        std::fs::create_dir_all(&bin).unwrap();
+    }
+    bin
+}
+
+pub fn lib() -> PathBuf {
+    let lib = home().join("lib");
+    if !lib.exists() {
+        std::fs::create_dir_all(&lib).unwrap();
+    }
+    lib
+}
+
+pub fn core() -> PathBuf {
+    let env_var = std::env::var("MOON_CORE_OVERRIDE");
+    if let Ok(path) = env_var {
+        return PathBuf::from(path);
+    }
+    home().join("lib").join("core")
+}
+
+pub fn core_bundle(backend: TargetBackend) -> PathBuf {
+    core()
+        .join("target")
+        .join(backend.to_dir_name())
+        .join("release")
+        .join("bundle")
+}
+
+pub fn core_packages_list(backend: TargetBackend) -> PathBuf {
+    core()
+        .join("target")
+        .join(backend.to_dir_name())
+        .join("release")
+        .join("bundle")
+        .join("packages.json")
+}
+
+pub fn core_core(backend: TargetBackend) -> PathBuf {
+    core()
+        .join("target")
+        .join(backend.to_dir_name())
+        .join("release")
+        .join("bundle")
+        .join("core.core")
+}
+
+pub fn cache() -> PathBuf {
+    home().join("registry").join("cache")
+}
+
+pub fn index() -> PathBuf {
+    home().join("registry").join("index")
+}
+
+/// Get the path of the index file of a package. [`base`] should be the path of
+/// the index directory, for example, returned from [`index()`].
+pub fn index_of_pkg(base: &Path, user: &str, pkg: &str) -> PathBuf {
+    base.join("user")
+        .join(user)
+        .join(pkg)
+        .with_extension("index")
+}
+
+pub fn credentials_json() -> PathBuf {
+    home().join("credentials.json")
+}
+
+pub fn config_json() -> PathBuf {
+    home().join("config.json")
+}
+
+#[test]
+fn test_moon_dir() {
+    use expect_test::expect;
+
+    let dirs = [
+        home(),
+        core_bundle(TargetBackend::default()),
+        cache(),
+        index(),
+        credentials_json(),
+        config_json(),
+    ];
+    dbg!(&dirs);
+    let dirs = dirs
+        .iter()
+        .map(|p| {
+            p.strip_prefix(home())
+                .unwrap()
+                .to_str()
+                .unwrap()
+                .replace(['\\', '/'], "|")
+        })
+        .collect::<Vec<_>>();
+    expect![[r#"
+        [
+            "",
+            "lib|core|target|wasm-gc|release|bundle",
+            "registry|cache",
+            "registry|index",
+            "credentials.json",
+            "config.json",
+        ]
+    "#]]
+    .assert_debug_eq(&dirs);
+}
diff --git a/crates/moonutil/src/mooncake_bin.rs b/crates/moonutil/src/mooncake_bin.rs
new file mode 100644
index 00000000..d45f12cf
--- /dev/null
+++ b/crates/moonutil/src/mooncake_bin.rs
@@ -0,0 +1,45 @@
+//! Interacts with the `mooncake` binary
+
+use std::path::PathBuf;
+
+fn determine_moon_bin() -> Option<PathBuf> {
+    // Check if the `mooncake` binary is in the executable's directory
+    let curr_exe = std::env::current_exe();
+    if let Ok(curr_exe) = curr_exe {
+        let mut moon_bin = curr_exe.clone();
+        moon_bin.set_file_name("moon");
+        #[cfg(windows)]
+        {
+            moon_bin.set_extension("exe");
+        }
+        if moon_bin.is_file() {
+            return Some(moon_bin);
+        }
+    }
+    None
+}
+
+pub fn call_moon_from_mooncake() -> std::process::Command {
+    std::process::Command::new(determine_moon_bin().unwrap_or_else(|| "moon".into()))
+}
+
+fn determine_mooncake_bin() -> Option<PathBuf> {
+    // Check if the `mooncake` binary is in the executable's directory
+    let curr_exe = std::env::current_exe();
+    if let Ok(curr_exe) = curr_exe {
+        let mut mooncake_bin = curr_exe.clone();
+        mooncake_bin.set_file_name("mooncake");
+        #[cfg(windows)]
+        {
+            mooncake_bin.set_extension("exe");
+        }
+        if mooncake_bin.is_file() {
+            return Some(mooncake_bin);
+        }
+    }
+    None
+}
+
+pub fn call_mooncake() -> std::process::Command {
+    std::process::Command::new(determine_mooncake_bin().unwrap_or_else(|| "mooncake".into()))
+}
diff --git a/crates/moonutil/src/mooncakes.rs b/crates/moonutil/src/mooncakes.rs
new file mode 100644
index 00000000..f1b663b2
--- /dev/null
+++ b/crates/moonutil/src/mooncakes.rs
@@ -0,0 +1,435 @@
+use std::{
+    collections::HashMap,
+    fs::File,
+    io::BufReader,
+    path::{Path, PathBuf},
+    str::FromStr,
+};
+
+use clap::Subcommand;
+use semver::Version;
+use serde::{Deserialize, Serialize};
+use sync::AutoSyncFlags;
+
+use crate::module::MoonMod;
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, PartialOrd, Ord)]
+pub struct ModuleId(u32);
+
+impl ModuleId {
+    pub fn new_usize(id: usize) -> Self {
+        Self(id as u32)
+    }
+
+    pub fn as_usize(&self) -> usize {
+        self.0 as usize
+    }
+}
+
+pub type DirSyncResult = HashMap<ModuleId, PathBuf>;
+
+#[derive(Clone, Serialize, Deserialize, PartialEq, Eq, Hash, PartialOrd, Ord)]
+pub struct ModuleName {
+    pub username: String,
+    pub pkgname: String,
+}
+
+impl std::fmt::Debug for ModuleName {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        if self.username.is_empty() {
+            f.write_fmt(format_args!("{}", self.pkgname))
+        } else {
+            f.write_fmt(format_args!("{}/{}", self.username, self.pkgname))
+        }
+    }
+}
+
+impl std::fmt::Display for ModuleName {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        if self.username.is_empty() {
+            f.write_fmt(format_args!("{}", self.pkgname))
+        } else {
+            f.write_fmt(format_args!("{}/{}", self.username, self.pkgname))
+        }
+    }
+}
+
+impl FromStr for ModuleName {
+    type Err = String;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        match s.split_once('/') {
+            Some((username, pkgname)) => Ok(ModuleName {
+                username: username.to_string(),
+                pkgname: pkgname.to_string(),
+            }),
+            None => Ok(ModuleName {
+                username: String::new(),
+                pkgname: s.to_string(),
+            }),
+        }
+    }
+}
+
+#[derive(Clone, Debug, Serialize, Deserialize, PartialEq, Eq, Hash, PartialOrd, Ord)]
+pub enum ModuleSourceKind {
+    /// Module comes from some registry. If param is `None`, it comes from the default
+    /// registry. Otherwise it comes from a specific registry (unused for now).
+    Registry(Option<String>), // Registry ID?
+    /// Module comes from a git repository.
+    // TODO: add branch/commit
+    Git(String),
+    /// Module comes from a local path. The path must be absolute.
+    Local(PathBuf),
+}
+
+impl Default for ModuleSourceKind {
+    fn default() -> Self {
+        ModuleSourceKind::Registry(None)
+    }
+}
+
+impl ModuleSourceKind {
+    pub fn is_default(&self) -> bool {
+        matches!(self, ModuleSourceKind::Registry(None))
+    }
+}
+
+impl std::fmt::Display for ModuleSourceKind {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            ModuleSourceKind::Registry(None) => write!(f, "default registry"),
+            ModuleSourceKind::Registry(Some(name)) => write!(f, "registry {}", name),
+            ModuleSourceKind::Local(path) => write!(f, "local {}", path.display()),
+            ModuleSourceKind::Git(url) => write!(f, "git {}", url),
+        }
+    }
+}
+
+#[derive(Clone, Serialize, Deserialize, PartialEq, Eq, Hash, PartialOrd, Ord)]
+pub struct ModuleSource {
+    pub name: ModuleName,
+    pub version: Version,
+    pub source: ModuleSourceKind,
+}
+
+impl ModuleSource {
+    pub fn from_version(name: ModuleName, version: Version) -> Self {
+        ModuleSource {
+            name,
+            version,
+            source: Default::default(),
+        }
+    }
+
+    pub fn from_registry_and_version(name: ModuleName, registry: &str, version: Version) -> Self {
+        ModuleSource {
+            name,
+            version,
+            source: ModuleSourceKind::Registry(Some(registry.to_owned())),
+        }
+    }
+
+    pub fn local_path(name: ModuleName, path: PathBuf, version: Version) -> Self {
+        ModuleSource {
+            name,
+            version,
+            source: ModuleSourceKind::Local(path),
+        }
+    }
+
+    pub fn from_local_module(module: &MoonMod, path: &Path) -> Option<Self> {
+        Some(ModuleSource {
+            name: module.name.parse().ok()?,
+            version: module
+                .version
+                .clone()
+                .unwrap_or_else(|| DEFAULT_VERSION.clone()),
+            source: ModuleSourceKind::Local(path.to_owned()),
+        })
+    }
+
+    pub fn git(name: ModuleName, url: String, version: Version) -> Self {
+        ModuleSource {
+            name,
+            version,
+            source: ModuleSourceKind::Git(url),
+        }
+    }
+}
+
+impl std::fmt::Display for ModuleSource {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "{}@{}", self.name, self.version)?;
+        if !self.source.is_default() {
+            write!(f, " ({})", self.source)?;
+        }
+        Ok(())
+    }
+}
+
+impl std::fmt::Debug for ModuleSource {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self, f)
+    }
+}
+
+impl std::str::FromStr for ModuleSource {
+    type Err = String;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        let parts = s.split_once('@').ok_or("missing version")?;
+        let version = Version::parse(parts.1).map_err(|e| e.to_string())?;
+        let name = parts.0.parse()?;
+        Ok(ModuleSource {
+            name,
+            version,
+            source: Default::default(),
+        })
+    }
+}
+
+/// The default version for modules that didn't specify a version.
+pub static DEFAULT_VERSION: Version = Version::new(0, 0, 0);
+
+pub mod result {
+    use std::rc::Rc;
+
+    use indexmap::IndexSet;
+    use petgraph::graphmap::DiGraphMap;
+
+    use crate::module::MoonMod;
+
+    use super::{ModuleId, ModuleName, ModuleSource};
+
+    pub type DependencyKey = ModuleName;
+
+    /// The result of a dependency resolution.
+    #[derive(Debug)]
+    pub struct ResolvedEnv {
+        mapping: IndexSet<ModuleSource>,
+        /// List of all modules in the environment.
+        modules: Vec<Rc<MoonMod>>,
+        /// The real dependency graph. Edges are labelled with the key of the dependency.
+        // FIXME: Using module names for dependency keys is not very efficient, both
+        // in terms of memory and speed. We should change the graph into a hashmap
+        // or something similar.
+        dep_graph: DiGraphMap<ModuleId, DependencyKey>,
+    }
+
+    impl ResolvedEnv {
+        pub fn mod_name_from_id(&self, id: ModuleId) -> &ModuleSource {
+            &self.mapping[id.as_usize()]
+        }
+
+        pub fn id_from_mod_name(&self, pkg: &ModuleSource) -> Option<ModuleId> {
+            self.mapping
+                .get_full(pkg)
+                .map(|(id, _)| ModuleId::new_usize(id))
+        }
+
+        pub fn module_info(&self, id: ModuleId) -> &Rc<MoonMod> {
+            &self.modules[id.as_usize()]
+        }
+
+        pub fn graph(&self) -> &DiGraphMap<ModuleId, DependencyKey> {
+            &self.dep_graph
+        }
+
+        /// Get all resolved dependencies of a module
+        pub fn deps(&self, id: ModuleId) -> impl Iterator<Item = ModuleId> + '_ {
+            self.dep_graph
+                .neighbors_directed(id, petgraph::Direction::Outgoing)
+        }
+
+        /// Get all resolved dependencies of a module along with their keys
+        pub fn deps_keyed(
+            &self,
+            id: ModuleId,
+        ) -> impl Iterator<Item = (ModuleId, &DependencyKey)> + '_ {
+            self.dep_graph
+                .edges_directed(id, petgraph::Direction::Outgoing)
+                .map(|(_s, t, k)| (t, k))
+        }
+
+        /// Get the module that `id` depends on, using `dep` as the key in the module manifest.
+        pub fn dep_with_key(&self, id: ModuleId, dep: &DependencyKey) -> Option<ModuleId> {
+            // FIXME: This is not very efficient
+            self.dep_graph
+                .edges_directed(id, petgraph::Direction::Outgoing)
+                .find_map(|(_s, t, k)| if k == dep { Some(t) } else { None })
+        }
+
+        pub fn dep_count(&self, id: ModuleId) -> usize {
+            self.dep_graph
+                .neighbors_directed(id, petgraph::Direction::Outgoing)
+                .count()
+        }
+
+        pub fn all_packages_and_id(&self) -> impl Iterator<Item = (ModuleId, &ModuleSource)> {
+            self.mapping
+                .iter()
+                .enumerate()
+                .map(|(id, pkg)| (ModuleId::new_usize(id), pkg))
+        }
+
+        pub fn all_packages(&self) -> impl Iterator<Item = &ModuleSource> {
+            self.mapping.iter()
+        }
+
+        pub fn builder() -> ResolvedEnvBuilder {
+            ResolvedEnvBuilder::new()
+        }
+
+        pub fn only_one_module(ms: ModuleSource, module: MoonMod) -> ResolvedEnv {
+            let mut builder = Self::builder();
+            builder.add_module(ms, Rc::new(module));
+            builder.build()
+        }
+    }
+
+    pub struct ResolvedEnvBuilder {
+        env: ResolvedEnv,
+    }
+
+    impl ResolvedEnvBuilder {
+        pub fn new() -> Self {
+            Self {
+                env: ResolvedEnv {
+                    mapping: IndexSet::new(),
+                    modules: Vec::new(),
+                    dep_graph: DiGraphMap::new(),
+                },
+            }
+        }
+
+        pub fn add_module(&mut self, pkg: ModuleSource, module: Rc<MoonMod>) -> ModuleId {
+            let id = ModuleId::new_usize(self.env.mapping.len());
+            self.env.mapping.insert(pkg);
+            self.env.modules.push(module);
+            assert_eq!(self.env.mapping.len(), self.env.modules.len());
+            id
+        }
+
+        pub fn add_dependency(&mut self, from: ModuleId, to: ModuleId, key: &DependencyKey) {
+            self.env.dep_graph.add_edge(from, to, key.to_owned());
+        }
+
+        pub fn build(self) -> ResolvedEnv {
+            self.env
+        }
+    }
+
+    impl Default for ResolvedEnvBuilder {
+        fn default() -> Self {
+            Self::new()
+        }
+    }
+}
+
+pub mod sync {
+    use serde::{Deserialize, Serialize};
+
+    #[derive(Debug, clap::Parser, Serialize, Deserialize, Clone)]
+    #[clap(next_help_heading = "Manifest Options")]
+    pub struct AutoSyncFlags {
+        /// Do not sync dependencies, assuming local dependencies are up-to-date
+        #[clap(long)]
+        pub frozen: bool,
+    }
+
+    impl AutoSyncFlags {
+        pub fn dont_sync(&self) -> bool {
+            self.frozen
+        }
+    }
+}
+
+#[derive(Serialize, Deserialize)]
+pub struct Credentials {
+    pub token: String,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct RegistryConfig {
+    pub registry: String,
+    pub index: String,
+}
+
+impl RegistryConfig {
+    pub fn new() -> Self {
+        if let Ok(v) = std::env::var("MOONCAKES_REGISTRY") {
+            RegistryConfig {
+                index: format!("{}/git/index", v),
+                registry: v,
+            }
+        } else {
+            RegistryConfig {
+                registry: "https://mooncakes.io".into(),
+                index: "https://mooncakes.io/git/index".into(),
+            }
+        }
+    }
+
+    pub fn load() -> Self {
+        let config_path = crate::moon_dir::config_json();
+        if !config_path.exists() {
+            return Self::new();
+        }
+        let file = File::open(config_path).unwrap();
+        let reader = BufReader::new(file);
+        let config: RegistryConfig = serde_json_lenient::from_reader(reader).unwrap();
+        config
+    }
+}
+
+impl Default for RegistryConfig {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+#[derive(Subcommand, Serialize, Deserialize)]
+pub enum MooncakeSubcommands {
+    Login(LoginSubcommand),
+    Register(RegisterSubcommand),
+    Publish(PublishSubcommand),
+}
+
+/// Log in to your account
+#[derive(Debug, clap::Parser, Serialize, Deserialize)]
+pub struct LoginSubcommand {}
+
+/// Register an account at mooncakes.io
+#[derive(Debug, clap::Parser, Serialize, Deserialize)]
+pub struct RegisterSubcommand {}
+
+/// Publish the current package
+#[derive(Debug, clap::Parser, Serialize, Deserialize)]
+pub struct PublishSubcommand {
+    #[clap(flatten)]
+    pub auto_sync_flags: AutoSyncFlags,
+}
+
+// username rule
+// at least 5 char, at most 39 char
+// may contain [a-z] [0-9] [A-Z] '-' '_'
+pub fn validate_username(username: &str) -> anyhow::Result<(), String> {
+    // Check the length constraints
+    if username.len() < 5 || username.len() > 39 {
+        return Err("Username must be between 5 and 39 characters long".to_string());
+    }
+
+    // Check for valid characters
+    if !username
+        .chars()
+        .all(|c| c.is_alphanumeric() || c == '-' || c == '_')
+    {
+        return Err(
+            "Usernames can only contain alphanumeric characters, dashes (-), and underscores (_)."
+                .to_string(),
+        );
+    }
+
+    Ok(())
+}
diff --git a/crates/moonutil/src/package.rs b/crates/moonutil/src/package.rs
new file mode 100644
index 00000000..28a9e6ae
--- /dev/null
+++ b/crates/moonutil/src/package.rs
@@ -0,0 +1,411 @@
+use std::{
+    collections::HashSet,
+    path::{Path, PathBuf},
+};
+
+use anyhow::{bail, Context};
+use colored::Colorize;
+use indexmap::IndexMap;
+use serde::{Deserialize, Serialize};
+
+use crate::{
+    common::GeneratedTestDriver,
+    path::{ImportComponent, PathComponent},
+};
+
+#[derive(Debug, Clone)]
+pub struct Package {
+    pub is_main: bool,
+    pub need_link: bool,
+    pub is_third_party: bool,
+    pub root_path: PathBuf,
+    pub root: PathComponent,
+    pub rel: PathComponent,
+    // *.mbt (exclude the following)
+    pub files: Vec<PathBuf>,
+    //  *_wbtest.mbt
+    pub wbtest_files: Vec<PathBuf>,
+    //  *_test.mbt
+    pub test_files: Vec<PathBuf>,
+    pub files_contain_test_block: Vec<PathBuf>,
+    pub imports: Vec<ImportComponent>,
+    pub wbtest_imports: Vec<ImportComponent>,
+    pub test_imports: Vec<ImportComponent>,
+    pub generated_test_drivers: Vec<GeneratedTestDriver>,
+    pub artifact: PathBuf,
+
+    pub link: Option<Link>,
+    pub warn_list: Option<String>,
+    pub alert_list: Option<String>,
+}
+
+impl Package {
+    pub fn full_name(&self) -> String {
+        if self.rel.full_name().is_empty() {
+            self.root.full_name()
+        } else {
+            format!("{}/{}", self.root.full_name(), self.rel.full_name())
+        }
+    }
+
+    pub fn last_name(&self) -> &str {
+        if self.rel.components.is_empty() {
+            self.root.components.last().unwrap()
+        } else {
+            self.rel.components.last().unwrap()
+        }
+    }
+
+    pub fn full_components(&self) -> PathComponent {
+        let mut comps = self.root.components.clone();
+        comps.extend(self.rel.components.iter().cloned());
+        PathComponent { components: comps }
+    }
+}
+
+#[derive(Debug, Serialize, Deserialize, PartialEq)]
+#[serde(rename_all = "kebab-case")]
+pub struct PackageJSON {
+    pub is_main: bool,
+    pub is_third_party: bool,
+    pub root: String,
+    pub rel: String,
+    pub files: Vec<String>,
+    // white box test
+    pub wbtest_files: Vec<String>,
+    // black box test
+    pub test_files: Vec<String>,
+    pub deps: Vec<AliasJSON>,
+    pub wbtest_deps: Vec<AliasJSON>,
+    pub test_deps: Vec<AliasJSON>,
+    pub artifact: String,
+}
+
+#[derive(Debug, Serialize, Deserialize, PartialEq)]
+pub struct AliasJSON {
+    pub path: String,
+    pub alias: String,
+}
+
+#[derive(Debug, Serialize, Deserialize, Clone)]
+#[serde(untagged)]
+pub enum PkgJSONImport {
+    Map(IndexMap<String, Option<String>>),
+    List(Vec<PkgJSONImportItem>),
+}
+
+#[derive(Debug, Serialize, Deserialize, Clone)]
+#[serde(untagged)]
+pub enum PkgJSONImportItem {
+    String(String),
+    Object { path: String, alias: String },
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+#[serde(untagged)]
+pub enum BoolOrLink {
+    Bool(bool),
+    Link(Box<Link>),
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct MoonPkgJSON {
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub name: Option<String>,
+
+    #[serde(skip_serializing_if = "Option::is_none")]
+    #[serde(alias = "is-main")]
+    #[serde(alias = "is_main")]
+    #[serde(rename(serialize = "is-main"))]
+    pub is_main: Option<bool>,
+
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub import: Option<PkgJSONImport>,
+
+    #[serde(skip_serializing_if = "Option::is_none")]
+    #[serde(alias = "wbtest-import")]
+    #[serde(alias = "wbtest_import")]
+    pub wbtest_import: Option<PkgJSONImport>,
+
+    #[serde(skip_serializing_if = "Option::is_none")]
+    #[serde(alias = "test-import")]
+    #[serde(alias = "test_import")]
+    pub test_import: Option<PkgJSONImport>,
+
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub link: Option<BoolOrLink>,
+
+    #[serde(skip_serializing_if = "Option::is_none")]
+    #[serde(alias = "warn-list")]
+    #[serde(alias = "warn_list")]
+    pub warn_list: Option<String>,
+
+    #[serde(skip_serializing_if = "Option::is_none")]
+    #[serde(alias = "alert-list")]
+    #[serde(alias = "alert_list")]
+    pub alert_list: Option<String>,
+}
+
+#[derive(Debug, Serialize, Deserialize, Clone)]
+pub struct ImportMemory {
+    pub module: String,
+    pub name: String,
+}
+
+#[derive(Debug, Serialize, Deserialize, Clone)]
+pub struct WasmLinkConfig {
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub exports: Option<Vec<String>>,
+
+    #[serde(skip_serializing_if = "Option::is_none")]
+    #[serde(rename = "heap-start-address")]
+    pub heap_start_address: Option<u32>,
+
+    #[serde(skip_serializing_if = "Option::is_none")]
+    #[serde(rename = "import-memory")]
+    pub import_memory: Option<ImportMemory>,
+
+    #[serde(skip_serializing_if = "Option::is_none")]
+    #[serde(rename = "export-memory-name")]
+    pub export_memory_name: Option<String>,
+
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub flags: Option<Vec<String>>,
+}
+
+#[derive(Debug, Serialize, Deserialize, Clone)]
+pub struct WasmGcLinkConfig {
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub exports: Option<Vec<String>>,
+
+    #[serde(skip_serializing_if = "Option::is_none")]
+    #[serde(rename = "import-memory")]
+    pub import_memory: Option<ImportMemory>,
+
+    #[serde(skip_serializing_if = "Option::is_none")]
+    #[serde(rename = "export-memory-name")]
+    pub export_memory_name: Option<String>,
+
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub flags: Option<Vec<String>>,
+}
+
+#[derive(Debug, Serialize, Deserialize, Clone)]
+pub struct JsLinkConfig {
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub exports: Option<Vec<String>>,
+
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub format: Option<JsFormat>,
+}
+
+#[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Default, Serialize, Deserialize)]
+#[repr(u8)]
+pub enum JsFormat {
+    #[default]
+    #[serde(rename = "esm")]
+    ESM,
+    #[serde(rename = "cjs")]
+    CJS,
+    #[serde(rename = "iife")]
+    IIFE,
+}
+
+impl JsFormat {
+    pub fn to_flag(&self) -> &'static str {
+        match self {
+            JsFormat::ESM => "esm",
+            JsFormat::CJS => "cjs",
+            JsFormat::IIFE => "iife",
+        }
+    }
+}
+
+#[derive(Debug, Serialize, Deserialize, Clone)]
+pub struct Link {
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub wasm: Option<WasmLinkConfig>,
+
+    #[serde(skip_serializing_if = "Option::is_none")]
+    #[serde(rename = "wasm-gc")]
+    pub wasm_gc: Option<WasmGcLinkConfig>,
+
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub js: Option<JsLinkConfig>,
+}
+
+#[derive(Debug, Serialize, Deserialize, Clone)]
+pub struct MoonPkg {
+    pub name: Option<String>,
+    pub is_main: bool,
+    pub need_link: bool,
+    pub imports: Vec<Import>,
+    pub wbtest_imports: Vec<Import>,
+    pub test_imports: Vec<Import>,
+
+    pub link: Option<Link>,
+    pub warn_list: Option<String>,
+    pub alert_list: Option<String>,
+}
+
+#[derive(Debug, Serialize, Deserialize, Clone)]
+#[serde(untagged)]
+pub enum Import {
+    Simple(String),
+    Alias { path: String, alias: String },
+}
+
+impl Import {
+    pub fn get_path(&self) -> &str {
+        match self {
+            Self::Simple(v) => v,
+            Self::Alias { path, alias: _ } => path,
+        }
+    }
+}
+
+pub fn convert_pkg_json_to_package(j: MoonPkgJSON) -> anyhow::Result<MoonPkg> {
+    let get_imports = |source: Option<PkgJSONImport>| -> Vec<Import> {
+        let mut imports = vec![];
+        if let Some(im) = source {
+            match im {
+                PkgJSONImport::Map(m) => {
+                    for (k, v) in m.into_iter() {
+                        match &v {
+                            None => imports.push(Import::Simple(k)),
+                            Some(p) => {
+                                if p.is_empty() {
+                                    imports.push(Import::Simple(k));
+                                } else {
+                                    imports.push(Import::Alias {
+                                        path: k,
+                                        alias: v.unwrap(),
+                                    })
+                                }
+                            }
+                        }
+                    }
+                }
+                PkgJSONImport::List(l) => {
+                    for item in l.into_iter() {
+                        match item {
+                            PkgJSONImportItem::String(s) => imports.push(Import::Simple(s)),
+                            PkgJSONImportItem::Object { path, alias } => {
+                                if alias.is_empty() {
+                                    imports.push(Import::Simple(path));
+                                } else {
+                                    imports.push(Import::Alias { path, alias })
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        };
+        imports
+    };
+
+    let imports = get_imports(j.import);
+    let wbtest_imports = get_imports(j.wbtest_import);
+    let test_imports = get_imports(j.test_import);
+
+    let mut is_main = j.is_main.unwrap_or(false);
+    if let Some(name) = &j.name {
+        if name == "main" {
+            is_main = true;
+            eprintln!(
+                "{}",
+                "Warning: The `name` field in `moon.pkg.json` is now deprecated. For the main package, please use `\"is-main\": true` instead. Refer to the latest documentation at https://www.moonbitlang.com/docs/build-system-tutorial for more information.".yellow()
+                    .bold()
+            );
+        }
+    }
+    let need_link = match &j.link {
+        None => false,
+        Some(BoolOrLink::Bool(b)) => *b,
+        Some(BoolOrLink::Link(_)) => true,
+    };
+
+    // TODO: check on the fly
+    let mut alias_dedup: HashSet<String> = HashSet::new();
+    for item in imports.iter() {
+        let alias = match item {
+            Import::Simple(p) => {
+                let alias = Path::new(p)
+                    .file_stem()
+                    .context(format!("failed to get alias of `{}`", p))?
+                    .to_str()
+                    .unwrap()
+                    .to_string();
+                alias
+            }
+            Import::Alias { path: _path, alias } => alias.clone(),
+        };
+        if alias_dedup.contains(&alias) {
+            bail!("Duplicate alias `{}`", alias);
+        } else {
+            alias_dedup.insert(alias.clone());
+        }
+    }
+
+    // TODO: check on the fly
+    let mut alias_dedup: HashSet<String> = HashSet::new();
+    for item in wbtest_imports.iter() {
+        let alias = match item {
+            Import::Simple(p) => {
+                let alias = Path::new(p)
+                    .file_stem()
+                    .context(format!("failed to get alias of `{}`", p))?
+                    .to_str()
+                    .unwrap()
+                    .to_string();
+                alias
+            }
+            Import::Alias { path: _path, alias } => alias.clone(),
+        };
+        if alias_dedup.contains(&alias) {
+            bail!("Duplicate alias `{}`", alias);
+        } else {
+            alias_dedup.insert(alias.clone());
+        }
+    }
+
+    // TODO: check on the fly
+    let mut alias_dedup: HashSet<String> = HashSet::new();
+    for item in test_imports.iter() {
+        let alias = match item {
+            Import::Simple(p) => {
+                let alias = Path::new(p)
+                    .file_stem()
+                    .context(format!("failed to get alias of `{}`", p))?
+                    .to_str()
+                    .unwrap()
+                    .to_string();
+                alias
+            }
+            Import::Alias { path: _path, alias } => alias.clone(),
+        };
+        if alias_dedup.contains(&alias) {
+            bail!("Duplicate alias `{}`", alias);
+        } else {
+            alias_dedup.insert(alias.clone());
+        }
+    }
+
+    let result = MoonPkg {
+        name: None,
+        is_main,
+        need_link,
+        imports,
+        wbtest_imports,
+        test_imports,
+        link: match j.link {
+            None => None,
+            Some(BoolOrLink::Bool(_)) => None,
+            Some(BoolOrLink::Link(l)) => Some(*l),
+        },
+        warn_list: j.warn_list,
+        alert_list: j.alert_list,
+    };
+    Ok(result)
+}
diff --git a/crates/moonutil/src/path.rs b/crates/moonutil/src/path.rs
new file mode 100644
index 00000000..b673df87
--- /dev/null
+++ b/crates/moonutil/src/path.rs
@@ -0,0 +1,221 @@
+use anyhow::bail;
+use std::fmt::Debug;
+use std::{
+    fmt::Formatter,
+    path::{Component, Path, PathBuf},
+};
+
+#[derive(Clone)]
+pub struct PathComponent {
+    pub components: Vec<String>,
+}
+
+impl PathComponent {
+    pub fn len(&self) -> usize {
+        self.components.len()
+    }
+
+    pub fn is_empty(&self) -> bool {
+        self.components.is_empty()
+    }
+
+    pub fn is_internal(&self) -> bool {
+        self.components.iter().any(|x| x == "internal")
+    }
+
+    pub fn can_import(&self, other: &PathComponent) -> bool {
+        if !other.is_internal() {
+            return true;
+        }
+        let mut i = 0;
+        let mut j = 0;
+        let internal_index = other
+            .components
+            .iter()
+            .position(|c| *c == "internal")
+            .unwrap();
+
+        while i < self.len() && j < internal_index {
+            if self.components[i] != other.components[j] {
+                return false;
+            }
+            i += 1;
+            j += 1;
+        }
+        true
+    }
+}
+
+#[test]
+#[cfg(unix)]
+fn test_path_component_1() {
+    let pc = PathComponent { components: vec![] };
+    assert!(pc.full_name() == "");
+    let pc = PathComponent {
+        components: vec!["a".into()],
+    };
+    assert!(pc.full_name() == "a");
+    let pc = PathComponent {
+        components: vec!["a".into(), "b".into()],
+    };
+    assert!(pc.full_name() == "a/b");
+}
+
+#[test]
+fn test_import_component_1() {
+    let ic = ImportComponent {
+        path: ImportPath {
+            module_name: "a/b".into(),
+            rel_path: PathComponent { components: vec![] },
+            is_3rd: true,
+        },
+        alias: None,
+    };
+    assert!(ic.path.make_full_path() == "a/b");
+    let ic = ImportComponent {
+        path: ImportPath {
+            module_name: "a".into(),
+            rel_path: PathComponent {
+                components: vec!["b".into()],
+            },
+            is_3rd: true,
+        },
+        alias: None,
+    };
+    assert!(ic.path.make_full_path() == "a/b");
+}
+
+impl Debug for PathComponent {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        write!(f, "#[{}]", self.components.join("|"))
+    }
+}
+
+impl PathComponent {
+    pub fn short_name(&self) -> &str {
+        if self.components.is_empty() {
+            ""
+        } else {
+            self.components.last().unwrap()
+        }
+    }
+
+    pub fn full_name(&self) -> String {
+        self.components.join("/")
+    }
+
+    pub fn fs_full_name(&self) -> String {
+        #[cfg(unix)]
+        return self.components.join("/");
+
+        #[cfg(windows)]
+        return self.components.join("\\");
+    }
+
+    pub fn from_path(p: &Path) -> anyhow::Result<PathComponent> {
+        let mut comps = vec![];
+        for comp in p.components() {
+            match comp {
+                Component::Normal(s) => {
+                    comps.push(s.to_str().unwrap().to_string());
+                }
+                _ => {
+                    bail!("invalid package path `{:?}`", p)
+                }
+            }
+        }
+        Ok(Self { components: comps })
+    }
+}
+
+impl std::str::FromStr for PathComponent {
+    type Err = anyhow::Error;
+    // like a/b/c
+    fn from_str(p: &str) -> anyhow::Result<PathComponent> {
+        let buf = PathBuf::from(p);
+        PathComponent::from_path(&buf)
+    }
+}
+
+#[derive(Clone)]
+pub struct ImportPath {
+    pub module_name: String,
+    pub rel_path: PathComponent,
+    pub is_3rd: bool,
+}
+
+impl ImportPath {
+    pub fn make_full_path(&self) -> String {
+        let mut p = self.module_name.clone();
+        if !self.rel_path.components.is_empty() {
+            p.push('/');
+            p.push_str(&self.rel_path.full_name())
+        }
+        p
+    }
+
+    pub fn make_rel_path(&self) -> String {
+        self.rel_path.full_name()
+    }
+}
+
+impl Debug for ImportPath {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        write!(
+            f,
+            "{}({}){}",
+            if self.is_3rd { "*" } else { "" },
+            self.module_name,
+            self.rel_path.full_name()
+        )
+    }
+}
+
+#[derive(Clone)]
+pub struct ImportComponent {
+    pub path: ImportPath,
+    pub alias: Option<String>,
+}
+
+impl ImportComponent {
+    pub fn full_components(&self) -> PathComponent {
+        let mut components: Vec<String> = PathBuf::from(&self.path.module_name)
+            .components()
+            .map(|x| x.as_os_str().to_str().unwrap().to_string())
+            .collect();
+        components.extend(self.path.rel_path.components.iter().cloned());
+        PathComponent { components }
+    }
+}
+
+impl Debug for ImportComponent {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        match &self.alias {
+            None => {
+                write!(f, "import {:?}", self.path)
+            }
+            Some(alias) => {
+                write!(f, "import {:?} as {}", self.path, alias)
+            }
+        }
+    }
+}
+
+#[test]
+fn test_internal() {
+    let x = PathComponent {
+        components: vec!["a".to_string(), "b".to_string()],
+    };
+    let y = PathComponent {
+        components: vec!["a".to_string(), "b".to_string(), "internal".to_string()],
+    };
+    assert!(x.can_import(&y));
+
+    let x = PathComponent {
+        components: vec!["x".to_string(), "y".to_string()],
+    };
+    let y = PathComponent {
+        components: vec!["a".to_string(), "b".to_string(), "internal".to_string()],
+    };
+    assert!(!x.can_import(&y));
+}
diff --git a/crates/moonutil/src/render.rs b/crates/moonutil/src/render.rs
new file mode 100644
index 00000000..24591810
--- /dev/null
+++ b/crates/moonutil/src/render.rs
@@ -0,0 +1,91 @@
+use ariadne::Fmt;
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct MooncDiagnostic {
+    pub level: String,
+    #[serde(alias = "loc")]
+    pub location: Location,
+    pub message: String,
+    pub error_code: u32,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct Location {
+    pub start: Position,
+    pub end: Position,
+    pub path: String,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct Position {
+    pub line: usize,
+    pub col: usize,
+    pub offset: isize,
+}
+
+impl MooncDiagnostic {
+    pub fn render(content: &str, use_fancy: bool) {
+        match serde_json_lenient::from_str::<MooncDiagnostic>(content) {
+            Ok(diagnostic) => {
+                let (kind, color) = diagnostic.get_level_and_color();
+
+                // for no-location diagnostic, like Missing main function in the main package(4067)
+                if diagnostic.location.path.is_empty() {
+                    println!(
+                        "{}",
+                        format!(
+                            "[{}] {}: {}",
+                            diagnostic.error_code, kind, diagnostic.message
+                        )
+                        .fg(color)
+                    );
+                } else {
+                    let source_file_path = &diagnostic.location.path;
+                    let source_file = std::fs::read_to_string(source_file_path)
+                        .unwrap_or_else(|_| panic!("failed to read {}", source_file_path));
+
+                    let mut report_builder = ariadne::Report::build(
+                        kind,
+                        source_file_path,
+                        diagnostic.location.start.offset as usize,
+                    )
+                    .with_code(diagnostic.error_code)
+                    .with_message(&diagnostic.message)
+                    .with_label(
+                        ariadne::Label::new((
+                            source_file_path,
+                            diagnostic.location.start.offset as usize
+                                ..diagnostic.location.end.offset as usize,
+                        ))
+                        .with_message((&diagnostic.message).fg(color))
+                        .with_color(color),
+                    );
+
+                    if !use_fancy {
+                        let config = ariadne::Config::default().with_color(false);
+                        report_builder = report_builder.with_config(config);
+                    }
+
+                    report_builder
+                        .finish()
+                        .print((source_file_path, ariadne::Source::from(source_file)))
+                        .unwrap();
+                }
+            }
+            Err(_) => {
+                println!("{}", content);
+            }
+        }
+    }
+
+    fn get_level_and_color(&self) -> (ariadne::ReportKind, ariadne::Color) {
+        if self.level == "error" {
+            (ariadne::ReportKind::Error, ariadne::Color::Red)
+        } else if self.level == "warning" {
+            (ariadne::ReportKind::Warning, ariadne::Color::BrightYellow)
+        } else {
+            (ariadne::ReportKind::Advice, ariadne::Color::Blue)
+        }
+    }
+}
diff --git a/crates/moonutil/src/scan.rs b/crates/moonutil/src/scan.rs
new file mode 100644
index 00000000..39149f34
--- /dev/null
+++ b/crates/moonutil/src/scan.rs
@@ -0,0 +1,519 @@
+use crate::module::ModuleDB;
+use crate::mooncakes::result::ResolvedEnv;
+use crate::mooncakes::DirSyncResult;
+use crate::package::{Import, Package};
+use crate::path::{ImportComponent, ImportPath, PathComponent};
+use anyhow::{bail, Context};
+use indexmap::map::IndexMap;
+use petgraph::graph::{DiGraph, NodeIndex};
+use std::collections::{HashMap, HashSet};
+use std::path::{Path, PathBuf};
+use std::str::FromStr;
+use walkdir::WalkDir;
+
+use crate::common::{
+    read_module_desc_file_in_dir, MoonbuildOpt, DEP_PATH, IGNORE_DIRS, MOONBITLANG_CORE,
+    MOON_MOD_JSON, MOON_PKG_JSON,
+};
+
+/// Matches an import string to scan paths.
+///
+/// Since the separation between module name and package name is unclear in import,
+/// we currently do a greedy search to match the longest prefix present in the module names.
+fn match_import_to_path(
+    env: &ScanPaths,
+    curr_module: &str,
+    import: &str,
+) -> anyhow::Result<ImportPath> {
+    let mut len = import.len();
+    let mut module_name = import;
+    loop {
+        if env.contains_key(module_name) {
+            let suffix = import[len..].trim_start_matches('/');
+            let is_3rd = module_name != curr_module;
+            return Ok(ImportPath {
+                module_name: module_name.to_owned(),
+                rel_path: PathComponent::from_str(suffix).unwrap(),
+                is_3rd,
+            });
+        } else {
+            match module_name.rfind('/') {
+                Some(d) => {
+                    len = d;
+                    module_name = &module_name[..len]
+                }
+                None => anyhow::bail!("No matching module was found for {}", import),
+            }
+        }
+    }
+}
+
+/// (*.mbt[exclude the following], *_wbtest.mbt, *_test.mbt)
+pub fn get_mbt_and_test_file_paths(dir: &Path) -> (Vec<PathBuf>, Vec<PathBuf>, Vec<PathBuf>) {
+    let mut mbt_files = vec![];
+    let mut mbt_wbtest_files = vec![];
+    let mut mbt_test_files = vec![];
+    let entries = std::fs::read_dir(dir).unwrap();
+    for entry in entries.flatten() {
+        if let Ok(t) = entry.file_type() {
+            if (t.is_file() || t.is_symlink())
+                && entry.path().extension().is_some()
+                && entry.path().extension().unwrap() == "mbt"
+            {
+                let p = entry.path();
+                let stem = p.file_stem().unwrap().to_str().unwrap();
+
+                let dot = stem.rfind('.');
+                match dot {
+                    None => {
+                        if stem.ends_with("_wbtest") {
+                            mbt_wbtest_files.push(p);
+                        } else if stem.ends_with("_test") {
+                            mbt_test_files.push(p);
+                        } else {
+                            mbt_files.push(p);
+                        }
+                    }
+                    Some(idx) => {
+                        let (filename, _dot_backend_ext) = stem.split_at(idx);
+                        if filename.ends_with("_wbtest") {
+                            mbt_wbtest_files.push(p);
+                        } else if filename.ends_with("_test") {
+                            mbt_test_files.push(p);
+                        } else {
+                            mbt_files.push(p);
+                        }
+                    }
+                }
+            }
+        }
+    }
+    (mbt_files, mbt_wbtest_files, mbt_test_files)
+}
+
+/// This is to support coverage testing for builtin packages.
+/// This function adds files in `../coverage` directory alongside files normally found in the
+/// package, in order to bring coverage testing into scope.
+///
+/// This function is a temporary workaround requested by Hongbo.
+/// It should be removed once proper package build disambiguation is implemented.
+fn workaround_builtin_get_coverage_mbt_file_paths(dir: &Path, paths: &mut Vec<PathBuf>) {
+    let coverage_dir = dir.parent().unwrap().join("coverage");
+    if coverage_dir.exists() {
+        let entries = std::fs::read_dir(coverage_dir).unwrap();
+        for entry in entries.flatten() {
+            if let Ok(t) = entry.file_type() {
+                if (t.is_file() || t.is_symlink())
+                    && entry.path().extension().is_some()
+                    && entry.path().extension().unwrap() == "mbt"
+                {
+                    paths.push(entry.path());
+                }
+            }
+        }
+    }
+}
+
+fn scan_module_packages(
+    env: &ScanPaths,
+    is_third_party: bool,
+    doc_mode: bool,
+    moonbuild_opt: &crate::common::MoonbuildOpt,
+    moonc_opt: &crate::common::MooncOpt,
+) -> anyhow::Result<IndexMap<String, Package>> {
+    let (module_source_dir, target_dir) = (&moonbuild_opt.source_dir, &moonbuild_opt.target_dir);
+
+    let mod_desc = read_module_desc_file_in_dir(module_source_dir)?;
+
+    let mut packages: IndexMap<String, Package> = IndexMap::new();
+
+    // scan local packages
+    let mut walker = WalkDir::new(module_source_dir)
+        .into_iter()
+        .filter_entry(|e| {
+            !IGNORE_DIRS.contains(&e.file_name().to_str().unwrap()) && e.file_type().is_dir()
+        });
+    while let Some(entry) = walker.next() {
+        // manual iter since we want to skip subdirectories containing moon module json
+
+        // We only care about 2 kinds of files here:
+        // 1. `moon.mod.json`. It signals the presence of a new module in this dir,
+        //    and if that dir isn't root, we wouldn't want to recurse into it.
+        // 2. `moon.pkg.json`. This is what we are willing to find.
+
+        let entry = entry.context("failed to read entry")?;
+        let path = entry.path();
+        let dir_contents = std::fs::read_dir(path)?;
+        let mut has_moon_mod = false;
+        let mut has_moon_pkg = false;
+        for it in dir_contents {
+            let filename = it?.file_name();
+            if filename == MOON_MOD_JSON && path != module_source_dir {
+                has_moon_mod = true;
+            } else if filename == MOON_PKG_JSON {
+                has_moon_pkg = true;
+            }
+        }
+
+        if has_moon_mod {
+            // This is a module located within the current module. Don't recurse into it any more.
+            walker.skip_current_dir();
+        } else if has_moon_pkg {
+            // Go on scanning the package
+            let cur_pkg = scan_one_package(
+                env,
+                path,
+                module_source_dir,
+                &mod_desc,
+                moonbuild_opt,
+                moonc_opt,
+                target_dir,
+                is_third_party,
+                doc_mode,
+            )?;
+
+            packages.insert(cur_pkg.full_name(), cur_pkg);
+        }
+    }
+    Ok(packages)
+}
+
+#[allow(clippy::too_many_arguments)] // FIXME
+fn scan_one_package(
+    env: &ScanPaths,
+    pkg_path: &Path,
+    module_source_dir: &PathBuf,
+    mod_desc: &crate::module::MoonMod,
+    moonbuild_opt: &MoonbuildOpt,
+    moonc_opt: &crate::common::MooncOpt,
+    target_dir: &PathBuf,
+    is_third_party: bool,
+    doc_mode: bool,
+) -> Result<Package, anyhow::Error> {
+    let get_imports = |source: Vec<Import>| -> anyhow::Result<Vec<ImportComponent>> {
+        let mut imports: Vec<ImportComponent> = vec![];
+        for im in source {
+            let x: anyhow::Result<ImportComponent> = match im {
+                crate::package::Import::Simple(path) => {
+                    let ic =
+                        match_import_to_path(env, &mod_desc.name, &path).with_context(|| {
+                            format!(
+                                "failed to read import path in \"{}\"",
+                                pkg_path.join(MOON_PKG_JSON).display()
+                            )
+                        })?;
+                    Ok(ImportComponent {
+                        path: ic,
+                        alias: None,
+                    })
+                }
+                crate::package::Import::Alias { path, alias } => {
+                    let ic = match_import_to_path(env, &mod_desc.name, &path)?;
+                    Ok(ImportComponent {
+                        path: ic,
+                        alias: Some(alias),
+                    })
+                }
+            };
+            let x = x?;
+            imports.push(x);
+        }
+        Ok(imports)
+    };
+
+    let pkg = crate::common::read_package_desc_file_in_dir(pkg_path)?;
+    let rel = pkg_path.strip_prefix(module_source_dir)?;
+    let rel_path = PathComponent::from_path(rel)?;
+
+    let imports = get_imports(pkg.imports)?;
+    let wbtest_imports = get_imports(pkg.wbtest_imports)?;
+    let test_imports = get_imports(pkg.test_imports)?;
+
+    let (mut mbt_files, mut wbtest_mbt_files, mut test_mbt_files) =
+        get_mbt_and_test_file_paths(pkg_path);
+
+    // workaround for builtin package testing
+    if moonc_opt.build_opt.enable_coverage
+        && mod_desc.name == MOONBITLANG_CORE
+        && rel_path.components == ["builtin"]
+    {
+        workaround_builtin_get_coverage_mbt_file_paths(pkg_path, &mut mbt_files);
+    }
+
+    let sort_input = moonbuild_opt.sort_input;
+    if sort_input {
+        mbt_files.sort();
+        wbtest_mbt_files.sort();
+        test_mbt_files.sort();
+    }
+    let artifact: PathBuf = target_dir.into();
+    let mut cur_pkg = Package {
+        is_main: pkg.is_main,
+        need_link: pkg.need_link,
+        is_third_party,
+        root_path: pkg_path.to_owned(),
+        root: PathComponent::from_str(&mod_desc.name)?,
+        files: mbt_files,
+        files_contain_test_block: vec![],
+        wbtest_files: wbtest_mbt_files,
+        test_files: test_mbt_files,
+        imports,
+        wbtest_imports,
+        test_imports,
+        generated_test_drivers: vec![],
+        artifact,
+        rel: rel_path,
+        link: pkg.link,
+        warn_list: pkg.warn_list,
+        alert_list: pkg.alert_list,
+    };
+    if doc_mode {
+        // -o <folder>
+        cur_pkg.artifact = cur_pkg
+            .artifact
+            .join(cur_pkg.root.full_name())
+            .join(cur_pkg.rel.fs_full_name())
+            .join(cur_pkg.last_name())
+            .with_extension("?");
+    } else {
+        cur_pkg.artifact = if is_third_party {
+            cur_pkg
+                .artifact
+                .join(DEP_PATH)
+                .join(cur_pkg.root.full_name())
+                .join(cur_pkg.rel.fs_full_name())
+                .join(cur_pkg.last_name())
+                .with_extension("?")
+        } else {
+            cur_pkg
+                .artifact
+                .join(cur_pkg.rel.fs_full_name())
+                .join(cur_pkg.last_name())
+                .with_extension("?")
+        };
+    }
+    Ok(cur_pkg)
+}
+
+type ScanPaths = HashMap<String, PathBuf>;
+
+/// Adapts the module data from [`ResolvedEnv`] into plain module names and their paths.
+/// Workaround before [`scan`] supports multiple modules/packages with the same name.
+fn adapt_modules_into_scan_paths(
+    resolved_modules: &ResolvedEnv,
+    module_paths: &DirSyncResult,
+) -> ScanPaths {
+    let mut result = HashMap::new();
+    for (id, module) in resolved_modules.all_packages_and_id() {
+        let path = module_paths
+            .get(&id)
+            .expect("All modules should be resolved");
+        let module_name = module.name.to_string();
+        result.insert(module_name, path.clone());
+    }
+    result
+}
+
+pub fn scan(
+    doc_mode: bool,
+    resolved_modules: &ResolvedEnv,
+    module_paths: &DirSyncResult,
+    moonc_opt: &crate::common::MooncOpt,
+    moonbuild_opt: &crate::common::MoonbuildOpt,
+) -> anyhow::Result<ModuleDB> {
+    let source_dir = &moonbuild_opt.source_dir;
+
+    let mod_desc = read_module_desc_file_in_dir(source_dir)?;
+    let deps: Vec<String> = mod_desc.deps.iter().map(|(name, _)| name.clone()).collect();
+
+    let module_scan_paths = adapt_modules_into_scan_paths(resolved_modules, module_paths);
+
+    let mut packages = scan_module_packages(
+        &module_scan_paths,
+        false,
+        doc_mode,
+        moonbuild_opt,
+        moonc_opt,
+    )?;
+
+    if moonbuild_opt.run_mode == crate::common::RunMode::Test {
+        if let Some(crate::common::TestOpt {
+            filter_package: Some(ref filter_package),
+            ..
+        }) = moonbuild_opt.test_opt
+        {
+            let pkgs = packages
+                .iter()
+                .filter(|(k, _)| filter_package.contains(Path::new(k)))
+                .map(|(_, v)| v);
+            let mut pkg_and_its_deps = HashSet::new();
+            for pkg in pkgs {
+                pkg_and_its_deps.extend(get_pkg_and_its_deps(pkg, &packages));
+            }
+            // filter out other packages
+            packages.retain(|k, _| pkg_and_its_deps.contains(k));
+        }
+    }
+
+    // scan third party packages in DEP_PATH according to deps field
+    for (module_id, _) in resolved_modules.all_packages_and_id() {
+        if resolved_modules.module_info(module_id).name == mod_desc.name {
+            continue; // skip self
+        }
+
+        let dir = module_paths.get(&module_id).unwrap();
+
+        let moonbuild_opt = &MoonbuildOpt {
+            source_dir: dir.clone(),
+            ..moonbuild_opt.clone()
+        };
+
+        let third_packages =
+            scan_module_packages(&module_scan_paths, true, doc_mode, moonbuild_opt, moonc_opt)?;
+        packages.extend(third_packages);
+    }
+
+    let sort_input = moonbuild_opt.sort_input;
+    if sort_input {
+        let mut xs: Vec<(String, Package)> = packages.into_iter().collect();
+        xs.sort_by(|a, b| a.0.cmp(&b.0));
+        packages = xs.into_iter().collect();
+    }
+
+    let mut graph = DiGraph::<String, usize>::new();
+    let mut name_to_idx: IndexMap<String, NodeIndex> = IndexMap::new();
+    let mut idx_to_name = IndexMap::new();
+
+    let mut entries = Vec::new();
+    for (i, (from_node, pkg)) in packages.iter().enumerate() {
+        if !name_to_idx.contains_key(from_node) {
+            let from_idx = graph.add_node(from_node.clone());
+            name_to_idx.insert(from_node.clone(), from_idx);
+            idx_to_name.insert(from_idx, from_node.clone());
+        }
+        if pkg.is_main {
+            entries.push(i);
+        }
+
+        let from_idx = name_to_idx[from_node];
+
+        for dep in pkg.imports.iter() {
+            let to_node = dep.path.make_full_path();
+            if !name_to_idx.contains_key(&to_node) {
+                let to_idx = graph.add_node(to_node.clone());
+                name_to_idx.insert(to_node.clone(), to_idx);
+                idx_to_name.insert(to_idx, to_node.clone());
+            }
+            let to_idx = name_to_idx[&to_node];
+            graph.add_edge(from_idx, to_idx, 0);
+        }
+    }
+
+    match petgraph::algo::toposort(&graph, None) {
+        Ok(_) => {}
+        Err(cycle) => {
+            let cycle = crate::graph::get_example_cycle(&graph, cycle.node_id());
+            let cycle = cycle
+                .into_iter()
+                .map(|n| idx_to_name[&n].clone())
+                .collect::<Vec<_>>();
+            bail!("cyclic dependency detected: {:?}", cycle);
+        }
+    }
+
+    entries.sort();
+
+    let module = ModuleDB {
+        source_dir: dunce::canonicalize(source_dir).unwrap(),
+        name: mod_desc.name.to_string(),
+        packages,
+        entries,
+        deps,
+        graph,
+        backend: moonc_opt.link_opt.target_backend.to_backend_ext().into(),
+    };
+
+    module.validate()?;
+
+    // log::debug!("{:#?}", module);
+    // log::debug!(
+    //     "{:?}",
+    //     petgraph::dot::Dot::with_config(&module.graph, &[petgraph::dot::Config::EdgeNoLabel])
+    // );
+    Ok(module)
+}
+
+fn get_pkg_and_its_deps(pkg: &Package, packages: &IndexMap<String, Package>) -> HashSet<String> {
+    let mut resolved = HashSet::new();
+    resolved.insert(pkg.full_name().clone());
+    resolve_deps_of_pkg(&pkg.full_name(), packages, &mut resolved);
+    resolved
+}
+
+// resolve deps of the given pkg in dfs way
+fn resolve_deps_of_pkg(
+    pkg_name: &String,
+    packages: &IndexMap<String, Package>,
+    res: &mut HashSet<String>,
+) {
+    let pkg = packages.get(pkg_name);
+    if let Some(pkg) = pkg {
+        for dep in pkg
+            .imports
+            .iter()
+            .chain(pkg.wbtest_imports.iter())
+            .chain(pkg.test_imports.iter())
+        {
+            let dep = &dep.path.make_full_path();
+            if !res.contains(dep) {
+                res.insert(dep.clone());
+                resolve_deps_of_pkg(dep, packages, res);
+            }
+        }
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use expect_test::expect;
+
+    use super::match_import_to_path;
+
+    #[test]
+    fn test_match_import() {
+        let scan_paths = [("foo/bar", ""), ("foo/baz", ""), ("foo/bar/baz", "")]
+            .into_iter()
+            .map(|(k, v)| (k.into(), v.into()))
+            .collect();
+
+        // foo/bar = package(foo/bar) / rel()
+        expect![[r#"
+            (foo/bar)
+        "#]]
+        .assert_debug_eq(&match_import_to_path(&scan_paths, "foo/bar", "foo/bar").unwrap());
+
+        // foo/bar/qux = package(foo/bar) / rel(qux)
+        expect![[r#"
+            (foo/bar)qux
+        "#]]
+        .assert_debug_eq(&match_import_to_path(&scan_paths, "foo/bar", "foo/bar/qux").unwrap());
+
+        // foo/bar/baz = package(foo/bar/baz) / rel()
+        expect![[r#"
+            *(foo/bar/baz)
+        "#]]
+        .assert_debug_eq(&match_import_to_path(&scan_paths, "foo/bar", "foo/bar/baz").unwrap());
+
+        // foo/bar/baz/qux = package(foo/bar/baz) / rel(qux)
+        expect![[r#"
+            *(foo/bar/baz)qux
+        "#]]
+        .assert_debug_eq(&match_import_to_path(&scan_paths, "foo/bar", "foo/bar/baz/qux").unwrap());
+
+        // foo/baz/qux = package(foo/baz) / rel(qux)
+        expect![[r#"
+            *(foo/baz)qux
+        "#]]
+        .assert_debug_eq(&match_import_to_path(&scan_paths, "foo/bar", "foo/baz/qux").unwrap());
+    }
+}
diff --git a/crates/moonutil/src/version.rs b/crates/moonutil/src/version.rs
new file mode 100644
index 00000000..cc8d7262
--- /dev/null
+++ b/crates/moonutil/src/version.rs
@@ -0,0 +1,25 @@
+//! Version utilities
+use semver::{Comparator, Op, Version, VersionReq};
+
+/// Converts a version into a semver comparator
+pub fn as_comparator(version: Version, op: Op) -> Comparator {
+    Comparator {
+        op,
+        major: version.major,
+        minor: Some(version.minor),
+        patch: Some(version.patch),
+        pre: version.pre,
+    }
+}
+
+/// Converts a version into a caret comparator
+pub fn as_caret_comparator(version: Version) -> Comparator {
+    as_comparator(version, Op::Caret)
+}
+
+/// Converts a version into a caret version requirement
+pub fn as_caret_version_req(version: Version) -> VersionReq {
+    VersionReq {
+        comparators: vec![as_caret_comparator(version)],
+    }
+}
diff --git a/docs/dev/README.md b/docs/dev/README.md
new file mode 100644
index 00000000..7a057225
--- /dev/null
+++ b/docs/dev/README.md
@@ -0,0 +1,170 @@
+# Contributing Quick Start
+
+## Contributor Copyright Assignment Agreement
+
+Before submitting your changes to the moon project, you must sign Contributor Copyright Assignment Agreement (CCAA), depending on who owns the copyright to your work:
+- For individual contributors, you can sign it online by visiting https://moonbitlang.com/cla/moon.
+- For corporate contributors, please download the CCAA from [CCAA-IDEA_IDEA Legal_20240712_IDEA Legal20240722.pdf](https://github.com/moonbitlang/moon/blob/CCAA/CCAA-IDEA_IDEA%20Legal_20240712_IDEA%20Legal20240722.pdf), sign it, and send it to us at jichuruanjian@idea.edu.cn.
+
+## Setup
+
+The first thing is to install Rust toolchain and MoonBit toolchain, if you have not setup, referring to:
+
+- [Install Rust](https://www.rust-lang.org/tools/install)
+- [MoonBit CLI Tools](https://www.moonbitlang.com/download/#moonbit-cli-tools)
+
+
+## How to Build and Test
+
+### On Unix
+
+```bash
+cargo build
+cargo test
+```
+
+The tests for `moon` depend on
+[expect-test](https://github.com/rust-analyzer/expect-test). If your changes
+affect the output of the tests, you can update the expected output:
+
+```bash
+env UPDATE_EXPECT=1 cargo test
+```
+
+### On Windows
+
+```bash
+cargo build
+cargo test
+```
+
+```powershell
+$env:UPDATE_EXPECT=1; cargo test; Remove-Item Env:\UPDATE_EXPECT
+```
+
+## How to Install
+
+The following command will install `moon` from source code, it will be installed at `~/.cargo/bin/`.(note that the original `moon` install via [MoonBit CLI Tools](https://www.moonbitlang.com/download/#moonbit-cli-tools) is at `~/.moon/bin/`)
+
+### Release Install
+
+```bash
+cargo install --path ./crates/moon
+```
+
+### Debug Install (faster)
+
+```bash
+cargo install --path ./crates/moon --debug
+```
+
+```bash
+# more faster
+cargo install --path ./crates/moon --debug --offline
+```
+
+
+## Source Code Overview
+
+The following content is based on [a28d2f1a](https://github.com/moonbitlang/moon/commit/a28d2f1a1bb47bdaf428fd150e0f6d2b4c959bb0), which may outdated as the project develops.
+
+- `crates/moon`
+  - `src/cli`: the command line interface of `moon`
+    - `src/cli/mooncake_adapter.rs`: forwards to the `mooncake`
+      binary
+    - `src/cli/generate_test_driver.rs`: as the name suggests
+  - `tests/test_cases/mod.rs`: all end-to-end tests are located in
+    this file
+
+- `crates/moonbuild`
+  - `src/{check, gen, build, bundle, entry, runtest}`: generate
+    commands and n2 state according to `moon.mod.json` and `moon.pkg.json`
+  - `src/bundle.rs`: only for `moonbitlang/core`, not visible
+    to users
+  - `src/bench.rs`: generates a project for benchmarking, will
+    be moved to `moon new`
+  - `src/dry_run.rs`: prints commands without executing them,
+    mainly used by end-to-end tests.
+  - `src/expect.rs`: the implementation of expect tests in
+    `moon`
+  - `src/upgrade.rs`: for `moon upgrade`. We hope to move it to
+    another binary crate, not mooncake, since depending on network in moonbuild
+    does not make sense.
+
+- `crates/mooncake`: package manager
+  - `src/pkg/add`: `moon add`
+  - `src/pkg/{install, sync}`: `moon install`
+  - `src/pkg/remove`: `moon remove`
+  - `src/pkg/tree`: `moon tree`
+  - `src/registry/online.rs`: downloads packages from
+    mooncakes.io
+  - `src/resolver/mvs.rs`: Go-like minimal version selection
+    algorithm.
+
+- `crates/moonutil`: currently not well organized, needs cleanup
+  - `src/common.rs`: common definitions shared by other crates
+  - `src/scan.rs`: scans the project directory to gather all
+    structural information
+  - `src/moon_dir.rs`: gets the `.moon`, `core`, etc. directory
+    paths and handles related environment variables
+  - `src/build.rs`: for `moon version`
+
+
+## Before PR
+
+It's recommended to run the following command before you submit a PR, which may
+help discover some potential CI failure ASAP
+
+```bash
+cargo fmt
+
+cargo clippy --all-targets --all-features -- -D warnings
+
+cargo test
+```
+
+We use [typos](https://github.com/crate-ci/typos) to avoid potential typos, you
+can also download and run it locally before PR.
+
+
+## Before Merging
+### Maintain Semi-Linear History
+
+To keep a clean and readable Git history, we follow a semi-linear history pattern. A semi-linear history looks like this:
+
+```
+$ git log --oneline --graph
+*
+|\
+| *
+|/
+*
+|\
+| *
+| *
+|/
+*
+```
+
+A semi-linear history improves readability, simplifies bug tracking.
+
+Until GitHub supports this natively (see discussion: [Support semi-linear history](https://github.com/orgs/community/discussions/8940)), we use rebase workflow and create a merge commit when merging a pull request to achieve a semi-linear history.
+
+### Updating Branches
+
+There are two ways to update branches: locally and on the GitHub Pull Request page.
+
+#### Updating Branches Locally
+
+1. Fetch the latest changes:
+    ```
+    git fetch
+    ```
+2. Rebase your branch:
+    ```
+    git rebase origin/main
+    ```
+
+#### Updating Branches on GitHub
+
+When updating a branch on the GitHub Pull Request page, always use the **"Update with Rebase"** option instead of "Update with merge commit." This helps in maintaining the desired semi-linear history.
diff --git a/licenserc.toml b/licenserc.toml
new file mode 100644
index 00000000..2bd4e51d
--- /dev/null
+++ b/licenserc.toml
@@ -0,0 +1,11 @@
+baseDir = "."
+
+inlineHeader = """
+"""
+
+excludes = [
+    "*.mbti",
+    "crates/moon/tests/test_cases/**",
+    "!crates/moon/tests/test_cases/mod.rs",
+    "crates/moonbuild/template/**",
+]
diff --git a/xtask/Cargo.toml b/xtask/Cargo.toml
new file mode 100644
index 00000000..4e8cf94d
--- /dev/null
+++ b/xtask/Cargo.toml
@@ -0,0 +1,12 @@
+[package]
+name = "xtask"
+version = "0.1.0"
+edition.workspace = true
+rust-version.workspace = true
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+anyhow = "1.0.79"
+clap = { version = "4.4.12" }
+xshell = "0.2.5"
diff --git a/xtask/src/main.rs b/xtask/src/main.rs
new file mode 100644
index 00000000..cac923c2
--- /dev/null
+++ b/xtask/src/main.rs
@@ -0,0 +1,47 @@
+use anyhow::{bail, Ok};
+use clap::{arg, ArgAction, Command};
+use xshell::{cmd, Shell};
+
+fn build_moon(is_release: bool) -> anyhow::Result<()> {
+    let sh = Shell::new()?;
+    if is_release {
+        cmd!(sh, "cargo build --package moon --release").run()?;
+    } else {
+        cmd!(sh, "cargo build --package moon").run()?;
+    }
+    Ok(())
+}
+
+fn cli() -> Command {
+    clap::Command::new("xtask")
+        .about("Some xtasks")
+        .subcommand_required(true)
+        .arg_required_else_help(true)
+        .subcommand(
+            Command::new("build")
+                .about("build")
+                .subcommand_required(true)
+                .arg_required_else_help(true)
+                .subcommand(
+                    Command::new("moon")
+                        .about("build moon")
+                        .arg(arg!(--release <bool>).action(ArgAction::SetTrue)),
+                ),
+        )
+}
+
+fn main() -> anyhow::Result<()> {
+    let matches = cli().get_matches();
+
+    match matches.subcommand() {
+        Some(("build", sub_matches)) => match sub_matches.subcommand() {
+            Some(("moon", sub_sub_matches)) => {
+                let release = sub_sub_matches.get_flag("release");
+                build_moon(release)?;
+            }
+            _ => unreachable!(),
+        },
+        _ => bail!("Invalid arguments"),
+    }
+    Ok(())
+}