Unit Testing

Unit tests validate individual components in isolation, ensuring correct behavior without external dependencies.

Quick Navigation

• Naming Conventions - it_should_ pattern with examples
• AAA Pattern - Arrange-Act-Assert structure
• Parameterized Tests - Using rstest for multiple test cases
• Mock Clock - Deterministic time testing with MockClock
• Temp Directories - TempDir usage and cleanup
• Test Builders - Builder pattern for test setup

Key Principles

• Isolation: Tests should not depend on external state or other tests
• Determinism: Same input always produces same output
• Fast Execution: Unit tests should run quickly
• Clear Intent: Test names and structure should be self-documenting