# Vitest Test Creator

> Test code creation, refactoring, and debugging with Vitest. Supports unit tests (.unit.test.ts) and React component/Hooks tests (.browser.test.tsx). Use when the user says "write tests", "add test cases", "refactor tests", "fix this test according to guidelines", etc. Use for creating, editing, or improving .test.ts/.test.tsx files. Use when this capability is needed.

- Skill: `tomevault-io/vitest-test-creator-2` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add tomevault-io/vitest-test-creator-2`
- Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/vitest-test-creator-2/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Web & Frontend
- Author: tomevault-io (https://skillmd.com/u/tomevault-io)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/tomevault-io/vitest-test-creator-2

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# Vitest Test Creator

## Project-Specific Test Types

| Test Type        | File Pattern         | Environment           | Target                             |
| ---------------- | -------------------- | --------------------- | ---------------------------------- |
| **Unit Test**    | `*.unit.test.ts`     | Node.js               | Pure functions in `utils/`, `lib/` |
| **Browser Test** | `*.browser.test.tsx` | Playwright (Chromium) | React components, hooks            |

See [file-layout.md](references/file-layout.md) for placement rules.

## Key Guidelines

- **Always call `cleanup()` in `afterEach`** for browser tests
- **Use `container.querySelector()`** instead of `screen.getByRole()` to avoid multiple element errors
- **jest-dom matchers** require `.browser.test.tsx` extension and `vitest.setup.ts` import

## References

- [file-layout.md](references/file-layout.md) - Test file placement
- [browser-testing.md](references/browser-testing.md) - Browser test patterns
- [unit-testing.md](references/unit-testing.md) - Unit test patterns
- [mocking.md](references/mocking.md) - Next.js mocking patterns
- [test-data-factories.md](references/test-data-factories.md) - fishery + faker usage
- [troubleshooting.md](references/troubleshooting.md) - Common errors

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<!-- tomevault:4.0:skill_md:2026-04-13 -->