unit-testing

name	unit-testing
description	Implement unit tests using Vitest table-driven approach, verifying domain/utility behavior with minimal mocks.

Trigger Conditions

• When adding or updating unit tests in *.test.ts
• When implementing domain models or pure functions with TDD

Execution Checklist

1. Review docs/testing/unit-testing.md
2. Write a failing test (Red) for a single behavior first
3. Expand cases using it.each / test.each
4. Re-run all cases after refactoring

Reference Documents

• docs/testing/unit-testing.md
• docs/web-frontend/twada-tdd.md