Vitest is a fast testing tool for TypeScript and JavaScript projects. It works with Vite, a modern build tool. Tests run instantly because of instant updates.
It supports TypeScript out of the box. You can test React and Vue components too. It is simple to set up and use.
Vitest also includes built-in coverage, snapshot testing, and a beautiful UI mode. It works great for both unit and component testing.
Global
mkdir -p ~/.claude/skills/vitestProject
mkdir -p .claude/skills/vitestSource Repository
Grill Memattpocock/skills
Stress-test your plan with relentless questions until we both understand
Tddmattpocock/skills
Write one test at a time then code to make it pass
Test Driven Developmentobra/superpowers
Write a failing test first then code just enough to pass
Qamattpocock/skills
Turn bug reports into GitHub issues through natural conversation without technical fuss
Migrate To Shoehornmattpocock/skills
Replace unsafe as assertions with type-safe partial test data easily
Webapp Testinganthropics/skills
Test your local web apps quickly with Playwright automation and screenshots
Playwright Best Practicescurrents-dev/playwright-best-practices-skill
Master Playwright testing with best practices for reliable and fast tests
Google Agents Cli Evalgoogle/agents-cli
Run evaluations on your AI agent, find failures, and improve its quality step by step