Why is Playwright the tool of choice for end-to-end tests?
There exists a rich ecosystem of tooling available for web-based end-to-end automated testing. Gutenberg uses Playwright as its end-to-end testing framework. The project previously used Puppeteer but has since fully migrated to Playwright. Here are the reasons Playwright was chosen:
- Multi-browser support. Playwright supports Chromium, Firefox, and WebKit out of the box, providing broader browser coverage compared to Puppeteer’s Chrome-only approach.
- Built-in test runner.
@playwright/testprovides a powerful test runner with parallel execution, fixtures, and auto-waiting, reducing flakiness and improving developer experience. - Auto-waiting and web-first assertions. Playwright automatically waits for elements to be actionable before performing actions, reducing the need for manual
waitFor*calls while still surfacing legitimate performance issues that affect users. - Better debugging tools. Playwright offers a trace viewer, UI mode, and a built-in inspector for step-by-step debugging.
- Fixtures over global variables. Playwright’s fixture model injects
page,browser, and other parameters into tests, making it easier to work with multiple pages or tabs and to run tests in parallel. - Page Object Model. Playwright encourages the Page Object Model pattern for reusable utility functions, improving test readability and maintainability.
For more details on writing end-to-end tests, see the End-to-End Testing guide.