vitest

Run Vitest unit tests for JavaScript and TypeScript projects.

1|1|Updated Jan 23, 2026
One-click install
npx skills add https://github.com/woody1234567/Nuxt_tech_blog --skill vitest-woody1234567
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: vitest
Source: https://github.com/woody1234567/Nuxt_tech_blog/tree/main/.agents/skills/vitest
Command: npx skills add https://github.com/woody1234567/Nuxt_tech_blog --skill vitest-woody1234567

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

Vitest provides fast, integrated unit testing for JavaScript and TypeScript projects.

Core Features & Use Cases

  • Lightweight, fast unit tests with Vite-powered transformation and fast test updates
  • Jest-compatible API with built-in mocking, coverage, snapshots, and fixtures
  • Suitable for TDD/BDD workflows, CI pipelines, and multi-project repos
  • Use cases include test-driven development for UI components, libraries, and server code

Quick Start

Install Vitest in your project and begin writing tests with vitest test, then run vitest run to execute them.

Frequently Asked Questions about vitest

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I run unit tests for TypeScript with native ESM support?

Vitest runs unit tests for TypeScript with native ESM and TSX support using a Vite-powered pipeline. It provides fast test updates and handles test files directly without requiring separate transpilation steps.

Can I use Jest-compatible APIs and mocking for JavaScript unit tests?

Vitest provides a Jest-compatible API for JavaScript unit tests, featuring built-in mocking, coverage, snapshots, and fixtures. This allows you to migrate or write tests using familiar Jest patterns seamlessly.

What is the best way to configure unit testing across multi-project repositories?

Vitest supports multi-project setups for unit testing, allowing you to define configurations and run tests across multiple projects within a single repository. It handles test filtering and fixtures for each project independently.

Does Vitest work with Vite-powered pipelines for test-driven development?

Vitest integrates directly with Vite-powered pipelines to deliver fast unit tests for test-driven development workflows. It leverages Vite's transformation pipeline to provide immediate feedback during UI component and library development.

Why use Vitest for fast unit tests in CI pipelines?

Vitest is designed for fast unit tests in CI pipelines through its lightweight Vite-based pipeline. It executes tests quickly and supports multi-project repositories, making it suitable for continuous integration environments.

How do I start writing unit tests after installing Vitest?

To write unit tests, install Vitest in your project and create test files. You begin writing tests with the vitest command, then execute your test suite by running vitest run.