Testing Best Practices

Guidelines for writing effective, maintainable tests that provide real confidence. Contains 6 rules focused on preferring E2E tests, minimizing mocking, and testing behavior over implementation.

Core Philosophy

1. Prefer E2E tests over unit tests - Test the whole system, not isolated pieces
2. Minimize mocking - If you need complex mocks, write an E2E test instead
3. Test behavior, not implementation - Test what users see and do
4. Avoid testing React components directly - Test them through E2E

When to Apply

Reference these guidelines when:

• Deciding what type of test to write
• Writing new E2E or unit tests
• Reviewing test code
• Refactoring tests