playwright: add a GitHub workflow to run the tests

The UI tests are most beneficial when they are run regularly ;-)

For starters, this allows running them in a GitHub workflow that is
triggered manually, offering the user to specify which site to test.

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

.github/workflows/playwright.yml

@@ -0,0 +1,28 @@
+name: Playwright Tests
+on:
+  workflow_dispatch:
+    inputs:
+      url:
+        description: 'URL to test'
+        required: true
+        default: 'https://git-scm.com'
+jobs:
+  test:
+    timeout-minutes: 60
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - uses: actions/setup-node@v4
+      with:
+        node-version: lts/*
+    - name: Install @playwright/test
+      run: npm install @playwright/test
+    - name: Run Playwright tests
+      env:
+        PLAYWRIGHT_TEST_URL: ${{ github.event.inputs.url }}
+      run: npx playwright test --project=chrome
+    - uses: actions/upload-artifact@v4
+      if: always()
+      with:
+        name: playwright-report
+        path: playwright-report/

playwright.config.js

@@ -48,6 +48,11 @@ module.exports = defineConfig({
       use: { ...devices['Desktop Safari'] },
     },
 
+    {
+      name: 'chrome',
+      use: { ...devices['Desktop Chrome'], channel: 'chrome' },
+    },
+
     /* Test against mobile viewports. */
     // {
     //   name: 'Mobile Chrome',