E2E Testing

Summary

End-to-End testing — verifying an entire user journey through the real, running application (often across frontend and backend together), the closest simulation of real usage.

• 1Write one E2E test covering your app's most critical flow (e.g. signup then first action).
• 2Run E2E tests in CI before every deploy.
• 3Keep the E2E suite small and focused — they're valuable but slow and expensive to maintain.