vitest

Run Vitest unit tests for JavaScript and TypeScript projects.

490|23|Updated Sep 25, 2023

Search Tags:#typescript #vitest #testing #javascript #vite #unit-testing

Ready to run

npx skills add https://github.com/victorgarciaesgi/regle --skill vitest-victorgarciaesgi

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: vitest
Source: https://github.com/victorgarciaesgi/regle/tree/main/.agents/skills/vitest
Command: npx skills add https://github.com/victorgarciaesgi/regle --skill vitest-victorgarciaesgi

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

Vitest provides a fast, integrated unit testing experience for modern Vite-based projects, replacing slower test runners and heavy configuration.

Core Features & Use Cases

Jest-compatible API with native ESM, TypeScript, and JSX support
Vite-powered test execution with fast feedback and instant module updates
Built-in coverage, snapshots, mocking, and concurrency for scalable testing
Use cases include frontend component testing, library development, and CI pipelines

Quick Start

Install Vitest in your project, place tests in your source tree, and run the Vitest CLI to execute tests with optional watch or run modes.

Frequently Asked Questions about vitest

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

FAQPage Schema

What is the best way to run unit tests for a Vite project?▼

Vitest provides a Vite-native unit testing framework that delivers blazing fast feedback and instant module updates for JavaScript and TypeScript projects. It uses Vite-powered test execution to streamline modern frontend and backend testing workflows.

Can I use Vitest if I am migrating from Jest?▼

Yes, Vitest supports a Jest-compatible API with native ESM, TypeScript, and JSX support. This allows you to transition your existing testing workflows to Vite-powered execution without rewriting your test suites.

How do I set up unit testing with Vitest in my source tree?▼

To set up unit testing, install Vitest in your project, place your test files in the source tree, and run the Vitest CLI. You need a Node.js environment, a project using Vite, and a Vitest configuration to execute tests in watch or run modes.

Does Vitest include built-in coverage and mocking for scalable testing?▼

Yes, Vitest includes built-in coverage, snapshots, mocking, and concurrency features. These capabilities support scalable testing scenarios like frontend component testing, library development, and CI pipelines.

Do I need a Vite configuration to run TypeScript unit tests with Vitest?▼

Yes, you need a project using Vite and a Vitest configuration to load and run TypeScript unit tests. Vitest leverages your existing Vite config to provide native ESM and TypeScript support during test execution.