Testing Patterns and Anti-Patterns

Testing Patterns

Good tests are fast, reliable, and maintainable. Follow the AAA pattern and avoid common anti-patterns.

AAA Pattern

• Arrange: Set up test data and preconditions
• Act: Call the function/method under test
• Assert: Verify the expected outcome

Anti-Patterns to Avoid

• Test interdependence: Tests should not rely on each other's state
• Testing implementation details: Test behavior, not internal mechanics
• Flaky tests: Tests that sometimes pass and sometimes fail
• Ignoring failing tests: Fix or delete them immediately