Test Writer

This automates the tedious work of writing Vitest tests for code examples in documentation. It scans your concept pages, extracts every console.log and return value, then generates proper test files with source line references and organized describe blocks. The four phase approach handles everything from basic assertions to DOM tests, async code, and intentional errors. It follows project conventions like putting fundamentals tests in one directory and advanced topics in another, naming DOM tests with .dom.test.js, and structuring describe blocks to mirror your documentation sections. Best for maintaining a docs site where you need confidence that every code snippet actually works as shown.

Install to Claude Code

npx -y skills add leonardomso/33-js-concepts --skill test-writer --agent claude-code