Agent skill
jest
Jest testing patterns and best practices. Unit, integration, and snapshot testing for JavaScript/TypeScript. Trigger: When writing or running tests with Jest.
Install this agent skill to your Project
npx add-skill https://github.com/majiayu000/claude-skill-registry/tree/main/skills/other/jest-joabgonzalez-ai-agents-framework
SKILL.md
Jest Skill
When to Use
- Unit, integration, or snapshot testing
- Testing JS/TS codebases
- Mocking dependencies
Critical Patterns
- Use describe/it for structure
- Use beforeEach/afterEach for setup/teardown
- Prefer jest.mock for isolation
Decision Tree
- Unit or integration? → Structure tests accordingly
- Need mocks? → Use jest.mock
- Async code? → Use async/await in tests
Edge Cases
- Mocking ES modules
- Flaky async tests
- Snapshot drift
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