Jest Generator

Generates Jest unit tests for JavaScript and TypeScript code with proper mocking, describe blocks, and coverage patterns. You get test files that follow the standard naming convention (Feature.test.tsx), include beforeEach/afterEach hooks for cleanup, and handle async testing, timers, and React components with Testing Library. The skill covers both bun and npm test runners, which is helpful since bun is faster but not everywhere yet. The structure templates are solid, especially the Arrange/Act/Assert pattern and the common matchers reference. Honestly, this is most useful when you need to backfill tests on existing code or want consistent test structure across a codebase without remembering every Jest API detail.

Install to Claude Code

npx -y skills add secondsky/claude-skills --skill jest-generator --agent claude-code