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vitest

Run Jest-compatible unit tests for Vite projects with coverage and snapshots.

Updated Feb 4, 2026
Search Tags:#typescript#vitest#testing#vite#coverage#unit-testing#esm
One-click install
npx skills add https://github.com/hakushun/ai-dev-starter --skill vitest-hakushun
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: vitest
Source: https://github.com/hakushun/ai-dev-starter/tree/main/.cursor/skills/vitest
Command: npx skills add https://github.com/hakushun/ai-dev-starter --skill vitest-hakushun

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

Vitest provides fast, integrated unit testing for Vite-based projects, offering a Jest-compatible API, native ESM support, and streamlined configuration.

Core Features & Use Cases

  • Fast, Vite-native test execution with instant feedback
  • Jest-compatible API for familiar testing patterns
  • Built-in coverage, snapshots, mocking, and fixtures
  • Use cases: test-driven development, component/unit testing for React, Vite apps, or libraries

Quick Start

Install Vitest in your project and run tests:

  • pnpm add -D vitest
  • npx vitest

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 testing for a Vite project using TypeScript?▼

Unit testing for a Vite project requires installing Vitest via pnpm add -D vitest and running npx vitest. It provides native ESM and TypeScript support, leveraging your existing Vite config for fast execution.

Can I use a Jest-compatible API for testing React components in Vite?▼

Yes, Vitest offers a Jest-compatible API for testing React components and utilities in modern front-end stacks. It provides familiar testing patterns while utilizing Vite's native ESM and JSX support.

What is the best way to get code coverage and mocks for Vite native ESM?▼

Vitest provides built-in coverage, mocks, and fixtures for Vite native ESM projects. You get instant feedback and streamlined configuration without additional external mocking libraries.

Does Vitest require a separate configuration file for Vite apps?▼

No, Vitest integrates directly with your existing Vite config. This Vite-native integration allows for streamlined configuration and fast test execution for your React components and libraries.

How do I run tests with filtering and snapshots in a Vite environment?▼

Vitest includes built-in snapshot tooling and test filtering for Vite projects. This enables fast test-driven development with instant feedback for your utilities and front-end libraries.

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