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vitest

Run unit and integration tests in Vite projects with Jest-compatible APIs.

2|Updated Apr 11, 2026
Search Tags:#typescript#vitest#testing#javascript#vite#mocking
One-click install
npx skills add https://github.com/PlazaCC/antes-da-tela --skill vitest-plazacc
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: vitest
Source: https://github.com/PlazaCC/antes-da-tela/tree/main/.agents/skills/vitest
Command: npx skills add https://github.com/PlazaCC/antes-da-tela --skill vitest-plazacc

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

Vitest simplifies adding unit and integration tests to Vite‑based projects, removing the need for separate testing frameworks and complex configurations.

Core Features & Use Cases

  • Vite‑native testing: Seamless integration with Vite's dev server and build pipeline.
  • Jest‑compatible API: Use familiar describe, it, expect, and mocking utilities.
  • Parallel execution & coverage: Run tests concurrently with built‑in coverage reporting.
  • TypeScript support: Full type checking for test files and type‑testing capabilities.
  • Mocking and environment control: Easily mock modules, timers, and switch between node, jsdom, and custom environments.

Quick Start

Use the vitest skill to configure testing for the project and run all tests.

Frequently Asked Questions about vitest

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

FAQPage Schema
How do I add unit testing to a Vite project without complex configurations?▼

You can add unit testing to a Vite project by using a Vite-native testing framework that integrates directly with the dev server and build pipeline. This removes the need for separate testing configurations.

Can I use Jest-compatible APIs and mocking for TypeScript testing in Vite?▼

Yes, Vite-native testing supports Jest-compatible APIs including describe, it, expect, and mocking utilities. It provides full TypeScript type checking for test files and type-testing capabilities.

Does Vitest support browser environment testing with jsdom or happy-dom?▼

Vitest supports browser environment testing by allowing you to switch between node, jsdom, and custom environments. This requires optional dependencies like jsdom or happy-dom installed in your Node.js environment.

How do I run tests concurrently and track code coverage in a JavaScript codebase?▼

You can run tests concurrently and track code coverage by utilizing built-in parallel execution and coverage reporting features. This provides fast, reliable results for your JavaScript or TypeScript codebase.

What configuration do I need to start running integration tests on a Vite project?▼

To start running integration tests, you need a vitest.config.ts file and a Node.js environment. The configuration enables seamless integration with Vite's pipeline and optional browser environment setup.

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