Testing Strategies

Guidance for writing effective, maintainable tests. Covers unit testing patterns, integration testing, mocking strategies, and test organization.

Core Principles

1. Test behavior, not implementation: Tests should verify what code does, not how
2. Arrange-Act-Assert: Structure every test with clear setup, action, and verification
3. One assertion per concept: Each test should verify one logical concept
4. Independent tests: Tests should not depend on each other or shared state
5. Fast feedback: Unit tests should run in milliseconds

Test Structure

Arrange-Act-Assert (AAA)