vitest

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

1|Updated Jan 23, 2026
One-click install
npx skills add https://github.com/sltc-dev/core-foundry --skill vitest-sltc-dev
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: vitest
Source: https://github.com/sltc-dev/core-foundry/tree/main/skills/coding/vitest
Command: npx skills add https://github.com/sltc-dev/core-foundry --skill vitest-sltc-dev

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill streamlines the process of writing and running unit tests for Vite-powered projects, offering a fast and Jest-compatible testing experience.

Core Features & Use Cases

  • Fast Test Execution: Leverages Vite's build pipeline for rapid test loading and updates.
  • Jest Compatibility: Uses a familiar API for easy migration and adoption.
  • Rich Features: Supports mocking, snapshots, coverage, type testing, and more.
  • Use Case: Quickly write and run unit tests for your React components, ensuring they function correctly in isolation before integration.

Quick Start

Use the vitest skill to run all tests in the 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 tests for a Vite project?

To run unit tests for a Vite project, you can use a Vite-native testing framework that leverages the Vite build pipeline for fast test loading and execution. It provides a Jest-compatible API to facilitate writing and running tests seamlessly within your existing Vite configuration.

What is the best way to migrate Jest tests to Vite?

The best way to migrate Jest tests to Vite is using a Jest-compatible testing framework designed for Vite. It allows for easy migration and adoption by providing a familiar API while integrating seamlessly with Vite's configuration and tooling for an optimized workflow.

Does Vite unit testing support mocking and snapshots?

Yes, Vite unit testing supports mocking and snapshots. The framework provides rich testing features including mocking, snapshots, coverage reporting, and type testing to ensure your JavaScript and TypeScript components function correctly in isolation.

Can I use this testing framework for TypeScript components?

Yes, you can use this testing framework for TypeScript components. It supports type testing and checking natively, allowing you to write and execute unit tests for JavaScript and TypeScript files while leveraging Vite's optimized development workflow.

Why are my Vite unit tests running slowly?

If your Vite unit tests are running slowly, switching to a framework that leverages Vite's build pipeline can significantly improve execution speed. It facilitates rapid test loading and updates by integrating seamlessly with Vite's configuration rather than using external transformers.