jest
When to use this skill
Use this skill whenever the user wants to:
- Write unit tests and integration tests with Jest
- Set up Jest in a project
- Use Jest matchers and assertions
- Test asynchronous code
- Mock functions, modules, and dependencies
- Create snapshot tests
- Configure Jest for different environments
- Use Jest with TypeScript, React, Vue, or other frameworks
- Run tests and generate coverage reports
- Use Jest CLI commands
- Set up test environments (jsdom, node)
- Use Jest with Vite (via vite-jest, though Vitest is recommended for new Vite projects)
How to use this skill
This skill is organized to match the Jest official documentation structure (https://jestjs.io/docs/getting-started, https://jestjs.io/docs/api). When working with Jest:
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