chore: adjust ut workflow

.github/workflows/tests.yml

@@ -22,12 +22,70 @@ jobs:
           for module in $modules; do go work use $module; list=$module"/... "$list; coverpkg=$module"/...,"$coverpkg; done
           go work sync
           go test -race -coverprofile=coverage.out -gcflags="all=-l -N" -coverpkg=$coverpkg $list
-
+      # Download main (aka base) branch breakdown
+      - name: Download Artifact (main.breakdown)
+        id: download-main-breakdown
+        uses: dawidd6/action-download-artifact@v6
+        with:
+          branch: main
+          workflow_conclusion: success
+          name: main.breakdown
+          if_no_artifact_found: warn
       - name: "Test Coverage"
         uses: vladopajic/go-test-coverage@v2
         with:
-          profile: coverage.out
-          threshold-total: 75
+          config: ./.testcoverage.yml
+          # Save current coverage breakdown if current branch is main. It will be
+          # uploaded as artifact in step below.
+          breakdown-file-name: ${{ github.ref_name == 'main' && 'main.breakdown' || '' }}
+
+          # If this is not main branch we want to show report including
+          # file coverage difference from main branch.
+          diff-base-breakdown-file-name: ${{ steps.download-main-breakdown.outputs.found_artifact && 'main.breakdown' || '' }}
+      - name: Upload Artifact (main.breakdown)
+        uses: actions/upload-artifact@v4
+        if: github.ref_name == 'main'
+        with:
+          name: main.breakdown
+          path: main.breakdown # as specified via `breakdown-file-name`
+          if-no-files-found: error
+      # Post coverage report as comment (in 3 steps)
+      - name: Find PR ID
+        run: |
+          PR_DATA=$(curl -s -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
+          "https://api.github.com/repos/${{ github.repository }}/pulls?head=${{ github.repository_owner }}:${{ github.ref_name }}&state=open")
+          PR_ID=$(echo "$PR_DATA" | jq -r '.[0].number')
+          
+          if [ "$PR_ID" != "null" ]; then
+          echo "pull_request_id=$PR_ID" >> $GITHUB_ENV
+          else
+          echo "No open pull request found for this branch."
+          fi
+      - name: find if coverage report is already present
+        if: env.pull_request_id
+        uses: peter-evans/find-comment@v3
+        id: fc
+        with:
+          issue-number: ${{ env.pull_request_id }}
+          comment-author: 'github-actions[bot]'
+          body-includes: 'go-test-coverage report:'
+      - name: post coverage report
+        if: env.pull_request_id
+        uses: peter-evans/create-or-update-comment@v4
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          issue-number: ${{ env.pull_request_id }}
+          comment-id: ${{ steps.fc.outputs.comment-id }}
+          edit-mode: replace
+          body: |
+            go-test-coverage report:
+            ```
+            ${{ fromJSON(steps.coverage.outputs.report) }} ```
+
+      - name: "finally check coverage"
+        if: steps.coverage.outcome == 'failure'
+        shell: bash
+        run: echo "coverage check failed" && exit 1
   unit-benchmark-test:
     runs-on: ubuntu-latest
     steps:

.testcoverage.yml

@@ -0,0 +1,27 @@
+# (mandatory)
+# Path to coverage profile file (output of `go test -coverprofile` command).
+#
+# For cases where there are many coverage profiles, such as when running
+# unit tests and integration tests separately, you can combine all those
+# profiles into one. In this case, the profile should have a comma-separated list
+# of profile files, e.g., 'cover_unit.out,cover_integration.out'.
+profile: cover.out
+
+# (optional; but recommended to set)
+# When specified reported file paths will not contain local prefix in the output.
+local-prefix: "github.com/cloudwego/eino"
+
+# Holds coverage thresholds percentages, values should be in range [0-100].
+threshold:
+  # (optional; default 0)
+  # Minimum overall project coverage percentage required.
+  total: 75
+
+# Holds regexp rules which will exclude matched files or packages
+# from coverage statistics.
+exclude:
+  # Exclude files or packages matching their paths
+  paths:
+    - "tests"
+    - "examples/"
+    - "mock/"