vitest

Run unit tests and generate coverage reports for JavaScript and TypeScript projects.

Updated Mar 8, 2026
One-click install
npx skills add https://github.com/martinezharo/fewya --skill vitest-martinezharo
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: vitest
Source: https://github.com/martinezharo/fewya/tree/main/.agents/skills/vitest
Command: npx skills add https://github.com/martinezharo/fewya --skill vitest-martinezharo

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

Vitest solves the friction of slow, complex testing setups by providing a high-performance, Vite-native framework that integrates seamlessly with your existing development environment.

Core Features & Use Cases

  • Vite-Native Performance: Leverages Vite's transformation pipeline for near-instant test updates and HMR-like feedback.
  • Jest Compatibility: Offers a drop-in replacement for Jest, allowing you to migrate existing suites with minimal configuration changes.
  • Advanced Testing Capabilities: Includes built-in support for mocking, snapshot testing, code coverage, and multi-threaded parallel execution.

Quick Start

Use the vitest skill to run all unit tests in the current project and generate a coverage report.

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 my Vite and TypeScript application?▼

You can run unit tests for Vite and TypeScript applications using a Vite-native framework that leverages Vite's transformation pipeline for near-instant test updates and multi-threaded parallel execution.

Can I migrate my Jest test suites to a Vite-native testing framework?▼

Yes, you can migrate Jest test suites to a Vite-native framework because it offers Jest-compatible APIs, allowing you to transition existing tests with minimal configuration changes.

How do I generate code coverage reports when unit testing JavaScript applications?▼

You can generate code coverage reports within a unified configuration environment by using a testing framework that includes built-in coverage analysis alongside mocking and snapshotting capabilities.

What is the best way to handle mocking in TypeScript unit tests?▼

The best way to handle mocking in TypeScript unit tests is using a framework with built-in advanced mocking capabilities that operates natively within your Vite transformation pipeline.

Does Vite-native testing support snapshot testing for JavaScript components?▼

Yes, Vite-native testing supports snapshot testing for JavaScript components as part of its advanced testing capabilities, alongside built-in mocking and code coverage analysis.

Why are my unit tests slow when using TypeScript, and how can Vite help?▼

Unit tests are often slow due to complex setups, but using a Vite-native testing framework solves this friction by leveraging Vite's pipeline for high-performance, HMR-like feedback during test execution.