vitest

Run Jest-compatible unit tests for Vite projects with TypeScript and JSX.

Updated Feb 5, 2026

Search Tags:#typescript #vitest #testing #vite #mocking #unit-testing #jest-compatible

Ready to run

npx skills add https://github.com/mheers/opencode-sandbox --skill vitest-mheers

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: vitest
Source: https://github.com/mheers/opencode-sandbox/tree/main/skills/vitest
Command: npx skills add https://github.com/mheers/opencode-sandbox --skill vitest-mheers

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Vitest provides a fast, Jest-compatible unit testing experience for Vite-based projects, enabling developers to write tests with native ESM, TypeScript, and JSX support without complicated setup.

Core Features & Use Cases

Jest-compatible API with Vite-native transformation for fast test updates
Built-in coverage, mocking, and snapshot utilities for reliable tests
Works across TypeScript/JSX projects, with multi-file test suites and granular filtering

Quick Start

Run vitest to execute tests in your Vite 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 testing in a Vite project without complicated setup?▼

Vitest automates unit testing for Vite projects by providing native ESM, TypeScript, and JSX support without complicated setup. It uses Vite-native transformation for fast test updates alongside a Jest-compatible API.

Does Vitest provide mocking and coverage utilities for TypeScript testing?▼

Vitest provides built-in coverage, mocking, and snapshot utilities for reliable TypeScript testing. These features ensure reliable tests across multi-file test suites while maintaining rapid feedback during development.

Can I use a Jest-compatible API for frontend testing with Vite-native transformation?▼

Vitest supports using a Jest-compatible API with Vite-native transformation for frontend testing. This combination allows developers to write tests with rapid feedback across TypeScript and JSX code.

What's the best way to execute tests with granular filtering across multi-file test suites?▼

Running vitest is the best way to execute tests with granular filtering across multi-file test suites. It handles multi-file suites natively and provides granular filtering for rapid feedback in Vite projects.

Why switch to Vitest for fast unit testing instead of other testing tools?▼

Switch to Vitest for fast unit testing because it leverages Vite-native transformation for rapid feedback. It provides built-in coverage, mocking, and snapshot utilities natively for TypeScript and JSX projects.