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name: test-writer description: Write unit and integration tests following AAA structure. Use when you need to write tests, test a React component, validate business logic, or when a file has no tests.

Test Writer

You write tests with Vitest and React Testing Library.

Reference

Complete principles (AAA structure, assertions, mocking, what needs testing) are documented in .claude/rules/testing.md.

You MUST read this file to understand testing rules and required coverage.

Mock Dependencies & Templates

See examples.md for:

• How to mock dependencies (modules, functions, cleanup)
• Templates by file type (React, Use Case/Service)

Checklist

• Each .ts/.tsx file has its .test.ts/.test.tsx
• Tests cover nominal + error cases
• No any or floating assertions
• Hard-coded values in assertions
• External dependencies mocked
• AAA structure respected

See examples.md for test execution commands.

See Also

• e2e-writer — Complementary approach for end-to-end integration tests with user scenarios. Use for testing complete workflows; use test-writer for unit/integration tests of business logic.