Add Playwright tests

.github/workflows/playwright.yml

@@ -0,0 +1,26 @@
+name: Playwright Tests
+
+on: push
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - uses: actions/setup-node@v4
+      with:
+        node-version: 18
+    - name: Install dependencies
+      run: npm ci
+    - name: Start local website
+      run: npm start
+    - name: Install Playwright Browsers
+      run: npx playwright install --with-deps
+    - name: Run Playwright tests
+      run: npx playwright test
+    - uses: actions/upload-artifact@v4
+      if: ${{ !cancelled() }}
+      with:
+        name: playwright-report
+        path: playwright-report/
+        retention-days: 30

.gitignore

@@ -14,4 +14,9 @@ src/**/*.generated.json
 /cypress/screenshots
 *.log
 __diff_output__
-*.tgz
+*.tgz
+node_modules/
+/test-results/
+/playwright-report/
+/blob-report/
+/playwright/.cache/

.nvmrc

@@ -1 +1 @@
-21
+18

package.json

@@ -32,13 +32,15 @@
   },
   "devDependencies": {
     "@fortawesome/free-solid-svg-icons": "^6.6.0",
+    "@playwright/test": "^1.48.1",
     "@rollup/plugin-commonjs": "^28.0.1",
     "@rollup/plugin-node-resolve": "^15.3.0",
     "@rollup/plugin-replace": "^6.0.1",
     "@rollup/plugin-typescript": "^12.1.1",
     "@tsconfig/svelte": "^5.0.4",
     "@types/d3-array": "^3.2.1",
     "@types/d3-dsv": "^3.0.7",
+    "@types/node": "^22.7.8",
     "@types/uikit": "^3.14.5",
     "@typescript-eslint/eslint-plugin": "^8.11.0",
     "@typescript-eslint/parser": "^8.11.0",

playwright.config.ts

@@ -0,0 +1,81 @@
+import { defineConfig, devices } from '@playwright/test';
+
+/**
+ * Read environment variables from file.
+ * https://github.com/motdotla/dotenv
+ */
+// import dotenv from 'dotenv';
+// import path from 'path';
+// dotenv.config({ path: path.resolve(__dirname, '.env') });
+
+/**
+ * See https://playwright.dev/docs/test-configuration.
+ */
+export default defineConfig({
+  testDir: './tests',
+  /* Run tests in files in parallel */
+  fullyParallel: true,
+  /* Fail the build on CI if you accidentally left test.only in the source code. */
+  forbidOnly: !!process.env.CI,
+  /* Retry on CI only */
+  retries: process.env.CI ? 2 : 0,
+  /* Opt out of parallel tests on CI. */
+  workers: process.env.CI ? 1 : undefined,
+  /* Reporter to use. See https://playwright.dev/docs/test-reporters */
+  reporter: 'html',
+  /* Shared settings for all the projects below. See https://playwright.dev/docs/api/class-testoptions. */
+  use: {
+    /* Base URL to use in actions like `await page.goto('/')`. */
+    // baseURL: 'http://127.0.0.1:3000',
+
+    /* Collect trace when retrying the failed test. See https://playwright.dev/docs/trace-viewer */
+    trace: 'on-first-retry',
+  },
+
+  /* Configure projects for major browsers */
+  projects: [
+    {
+      name: 'chromium',
+      use: { ...devices['Desktop Chrome'] },
+    },
+
+    /** Omit the extra browsers for rate limiting reasons
+    {
+      name: 'firefox',
+      use: { ...devices['Desktop Firefox'] },
+    },
+
+    {
+      name: 'webkit',
+      use: { ...devices['Desktop Safari'] },
+    },
+    **/
+
+    /* Test against mobile viewports. */
+    // {
+    //   name: 'Mobile Chrome',
+    //   use: { ...devices['Pixel 5'] },
+    // },
+    // {
+    //   name: 'Mobile Safari',
+    //   use: { ...devices['iPhone 12'] },
+    // },
+
+    /* Test against branded browsers. */
+    // {
+    //   name: 'Microsoft Edge',
+    //   use: { ...devices['Desktop Edge'], channel: 'msedge' },
+    // },
+    // {
+    //   name: 'Google Chrome',
+    //   use: { ...devices['Desktop Chrome'], channel: 'chrome' },
+    // },
+  ],
+
+  /* Run your local dev server before starting the tests */
+  // webServer: {
+  //   command: 'npm run start',
+  //   url: 'http://127.0.0.1:3000',
+  //   reuseExistingServer: !process.env.CI,
+  // },
+});