vitest

Run unit and integration tests for Vite projects using Vitest.

Updated Jan 2, 2026
One-click install
npx skills add https://github.com/onmax/claude-config --skill vitest-onmax
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: vitest
Source: https://github.com/onmax/claude-config/tree/main/skills/vitest
Command: npx skills add https://github.com/onmax/claude-config --skill vitest-onmax

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill simplifies the process of writing and running unit and integration tests for Vite projects, providing a robust testing framework and clear guidance.

Core Features & Use Cases

  • Vite-Native Testing: Leverages Vitest, a fast testing framework built for Vite.
  • Jest-Compatible API: Familiar syntax for developers coming from Jest.
  • Component Testing: Ideal for testing Vue, React, and Svelte components.
  • Mocking & Coverage: Includes tools for mocking modules, timers, and setting up code coverage reports.

Quick Start

Use the vitest skill to set up a basic test file in your Vite project.

Frequently Asked Questions about vitest

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

FAQPage Schema
How do I set up unit and integration testing for a Vite project?

Unit and integration testing for a Vite project is set up using Vitest, a framework that integrates seamlessly with Vite's build tooling to provide a fast development experience.

Can I test Vue, React, and Svelte components with Vitest?

Yes, Vitest supports component testing for Vue, React, and Svelte, allowing you to write and run tests for your UI components directly within your Vite environment.

Does Vitest work with Jest syntax for migrating JavaScript tests?

Vitest provides a Jest-compatible API, offering familiar syntax for JavaScript developers coming from Jest to ensure a smooth migration to a Vite-native testing framework.

How do I mock modules and manipulate timers in JavaScript tests?

You can mock modules and manipulate timers in JavaScript tests using Vitest's built-in mocking tools, which also support configuring code coverage analysis for your project.

Do I need Vite to use Vitest for TypeScript testing?

Vitest is a Vite-native testing framework designed specifically for Vite projects, leveraging the build tooling to deliver fast test execution for your TypeScript and JavaScript code.