vitest — Skills — getagentictools

What it does

Vite-native: Uses Vite's transformation pipeline for fast HMR-like test updates

Jest-compatible: Drop-in replacement for most Jest test suites

Smart watch mode: Only reruns affected tests based on module graph

Native ESM, TypeScript, JSX support without configuration

Multi-threaded workers for parallel test execution

Built-in coverage via V8 or Istanbul

Snapshot testing, mocking, and spy utilities

Vitest fast unit testing framework powered by Vite with Jest-compatible API. Use when writing tests, mocking, configuring coverage, or working with test filtering and fixtures.

Source

Repository: https://github.com/antfu/skills

vitest FAQ

What does the vitest skill do?

Vitest fast unit testing framework powered by Vite with Jest-compatible API. Use when writing tests, mocking, configuring coverage, or working with test filtering and fixtures. Vite-native: Uses Vite's transformation pipeline for fast HMR-like test updates Jest-compatible: Drop-in replacement for most Jest test suites

How do I install vitest?

Run: npx -y skills add https://github.com/antfu/skills --skill vitest --agent claude-code — the source lives at github.com/antfu/skills.

Maintain vitest?

Let people know it's listed here — add the badge (live metrics, light/dark aware) or a plain link to your README or docs.

[![vitest on getagentictools](https://getagentictools.com/badge/skills/antfu-skills-vitest.svg)](https://getagentictools.com/skills/antfu-skills-vitest?ref=badge)

npx agentictools info skills/antfu-skills-vitest

The second line is the CLI lookup for this page — handy in READMEs and docs.