vitest

Run Jest-compatible unit tests in Vite-powered projects with mocking and coverage.

Updated Mar 26, 2026
One-click install
npx skills add https://github.com/SteepCraft/Base-de-datos-2 --skill vitest-steepcraft
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: vitest
Source: https://github.com/SteepCraft/Base-de-datos-2/tree/main/.agents/skills/vitest
Command: npx skills add https://github.com/SteepCraft/Base-de-datos-2 --skill vitest-steepcraft

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

Vitest is a fast, Jest-compatible testing framework built for Vite, enabling seamless test execution in modern front-end apps.

Core Features & Use Cases

  • Jest-compatible API inside a vite-powered workflow for quick adoption.
  • Vite-native transformation pipeline for fast test runs, HMR-like updates, and native ESM support.
  • Built-in coverage, snapshot testing, and robust mocking utilities for reliable QA.
  • Excellent watch mode and multi-project support for scalable testing in large apps.

Quick Start

Install Vitest in your project and run vitest to execute your tests.

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 project using TypeScript?

Vitest enables fast unit testing in Vite-powered projects by utilizing Vite's native transformation pipeline for quick test execution. It offers native TypeScript, ESM, and JSX support out of the box.

Can I use a Jest-compatible API for testing in a Vite workflow?

Yes, Vitest provides a Jest-compatible API inside a Vite-powered workflow for quick adoption. It includes built-in coverage, snapshot testing, and robust mocking utilities for reliable QA.

Does Vitest support native ESM and JSX in modern frontend testing?

Yes, Vitest supports native ESM, TypeScript, and JSX out of the box for modern frontend testing. It leverages Vite's config and plugin ecosystem to handle transformations seamlessly during test execution.

What is the best way to get fast feedback during test runs?

Vitest offers excellent watch mode with HMR-like updates to provide fast feedback during test runs. This ensures quick test execution and scalable testing workflows for large applications with multi-project support.

How do I handle mocking and code coverage in a Vite testing environment?

Vitest includes built-in code coverage, snapshot testing, and robust mocking utilities to handle QA in a Vite testing environment. These features integrate directly with Vite's native transformation pipeline.

Is Vitest suitable for scalable testing in large full-stack apps?

Vitest is designed for frontend and modern full-stack apps, providing scalable testing workflows. It includes multi-project support and excellent watch mode to handle large applications effectively.