Principles

• Test behavior, not implementation details
• Prefer integration tests over unit tests (Testing Trophy)
• Arrange-Act-Assert (AAA) pattern in every test
• Tests must be independent — no shared mutable state
• Keep tests small and focused — one behavior per test
• Name tests to describe the behavior being verified
• Optimize for confidence, not coverage percentage
• Don't chase 100% coverage — test what matters

Rules

See rules index for detailed patterns.

Examples

Positive Trigger