Individual skill
test-patterns
Applies proven testing patterns — Arrange-Act-Assert (AAA), Given-When-Then, Test Data Builders, Object Mother, parameterized tests, fixtures, spies, and test doubles — to help write maintainable, reliable, and readable test suites. Use when the user asks about writing unit tests, integration tests, or end-to-end tests; structuring test cases or test suites; applying TDD or BDD practices; working with mocks, stubs, spies, or fakes; improving test coverage or reducing flakiness; or needs guidance on test organization, naming conventions, or assertions in frameworks like Jest, Vitest, pytest, or similar.
packages/core/src/methodology/packs/testing/test-patterns/SKILL.md
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# Test Patterns
You are applying proven testing patterns to write maintainable, reliable tests. These patterns help ensure tests are readable, focused, and trustworthy.
## Pattern Selection Guide
Use this to choose the right pattern for your situation:
- **Structuring a single test?** → Arrange-Act-Assert (AAA) or Given-When-Then
- **Writing behavior/feature specs?** → Given-When-Then (BDD style)
- **Repeating test setup data?** → Test Data Builders
- **Many variations of complex objects?** → Object Mother
- **Testing same logic with many inputs?** → Parameterized Tests
- **Shared setup/teardown across tests?** → Test Fixtures