Chromestatus Playwright Testing

Playwright Testing Skill

This skill provides guidance on how to manage end-to-end tests using Playwright. Use these commands when frontend changes cause visual or functional regressions in the integration tests.

Running Tests

Run all Playwright tests

make pwtests

Run tests in UI mode (Interactive)

Useful for debugging and seeing the browser in action.

make pwtests-ui

Correcting Tests and Updating Snapshots

If your changes are intentional but cause visual regressions (e.g., you updated a CSS style or modified a component's layout), you may need to update the baseline snapshots.

Update Playwright snapshots

make pwtests-update

Debugging

Show test report

If tests fail in CI or locally, you can view a detailed HTML report.

make pwtests-report

Debug a specific test

make pwtests-debug

Best Practices

1. Verify Before Submitting: Always run make pwtests locally if you change any files in client-src/elements/ or templates/.
2. Review Snapshots: When running make pwtests-update, carefully review the diffs in the __screenshots__ directories to ensure only intended changes are captured.
3. Shutdown Environment: If the Playwright environment stays active and consumes resources, you can manually shut it down.

make pwtests-shutdown

Reference

• Test Directory: @packages/playwright/tests
• Configuration: @playwright.config.ts
• Build Targets: @Makefile