Testing Guidelines

Unit Tests

• Test one thing per test
• Use descriptive test names: test_user_creation_fails_with_invalid_email
• Mock external dependencies

Integration Tests

• Test API endpoints with realistic data
• Verify database state changes
• Clean up test data after each test

Running Tests

• npm test — Run all tests
• npm test:unit — Unit tests only
• npm test:integration — Integration tests (requires database)