test-writer
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.
Installation
Follow the repository instructions for this skill and your agent. Review the files and dependencies before adding it to your workflow.
View source ↗GuidesSkill instructions
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/.tsxfile has its.test.ts/.test.tsx - Tests cover nominal + error cases
- No
anyor 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.
Examples
Read the usage examples in the source repository.
View source ↗Source history
- Indexed on
- 2026-01-20
- Index updated
- 2026-01-26
- Branch
- main
Index and sync dates describe this directory. View the source repository for code history.
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