vitest

Run unit tests for Vite projects with a Jest-compatible API.

1|Updated Feb 24, 2026
One-click install
npx skills add https://github.com/xurenlu/marstaff --skill vitest-xurenlu
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: vitest
Source: https://github.com/xurenlu/marstaff/tree/main/skills/vitest
Command: npx skills add https://github.com/xurenlu/marstaff --skill vitest-xurenlu

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill provides a rapid and efficient way to write and run unit tests for your Vite-powered projects, ensuring code quality and stability.

Core Features & Use Cases

  • Fast Test Execution: Leverages Vite's build pipeline for near-instantaneous test runs and HMR-like updates.
  • Jest-Compatible API: Offers a familiar testing experience for developers accustomed to Jest.
  • Rich Feature Set: Supports mocking, snapshots, code coverage, type testing, and more out-of-the-box.
  • Use Case: When developing a new feature, use this Skill to write unit tests that verify the functionality of individual components and functions, catching regressions early.

Quick Start

Use the vitest skill to run all tests in the project.

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 a Vite JavaScript project?

You can run unit tests for a Vite JavaScript project using a Vite-native framework that leverages the existing build pipeline for near-instantaneous execution and HMR-like updates, ensuring rapid feedback during development.

Can I use a Jest-compatible API for TypeScript unit testing?

Yes, you can use a Jest-compatible API for TypeScript unit testing within the Vite ecosystem. This allows developers accustomed to Jest to write tests with a familiar experience while supporting TypeScript out of the box.

Does Vite-native unit testing support mocking and code coverage?

Vite-native unit testing supports mocking, snapshots, code coverage, and type testing out of the box. These features enable efficient code validation and quality assurance directly within your development workflow.

What is the best way to catch regressions early when developing new features?

The best way to catch regressions early is to write unit tests that verify the functionality of individual components and functions. Using a fast Vite-native framework ensures test runs are near-instantaneous, streamlining the validation process.

How do I get started with running all tests in my project?

To get started with running all tests in your project, use the vitest command to execute the test suite. This action validates your codebase using the configured Vite build pipeline and Jest-compatible API.