vitest

Automate unit testing for Vitest in Vite projects.

1|Updated Feb 9, 2026
One-click install
npx skills add https://github.com/blesstosam/trpc-fastify-starter --skill vitest-blesstosam
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: vitest
Source: https://github.com/blesstosam/trpc-fastify-starter/tree/main/.agents/skills/vitest
Command: npx skills add https://github.com/blesstosam/trpc-fastify-starter --skill vitest-blesstosam

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

Vitest provides fast, integrated unit testing for Vite-based projects with a Jest-compatible API, reducing test feedback loops and boilerplate.

Core Features & Use Cases

  • Native ESM and TypeScript support with zero-config for many use cases.
  • Jest-compatible API for a familiar test experience; built-in coverage and Vite integration.
  • Quick feedback during development with fast startup and test execution.

Quick Start

Run Vitest from the project root to start fast, in-context tests during development.

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 with native ESM and TypeScript support?

To run unit tests for a Vite project with native ESM and TypeScript support, use Vitest to execute fast tests with zero-config setup. It leverages Vite's native ESM and TypeScript capabilities directly for quick development feedback.

Can I use a Jest-compatible API for testing my Vue or React Vite applications?

Yes, you can use a Jest-compatible API for testing Vue or React Vite applications. Vitest supports a familiar Jest-compatible API, allowing you to author tests seamlessly without changing existing testing habits.

What is the best way to get fast test feedback loops during frontend development?

The best way to get fast test feedback loops during frontend development is using Vitest. It reduces feedback loops and boilerplate by providing fast startup and in-context test execution directly within your Vite environment.

Does Vitest work with JSX and provide built-in test coverage?

Yes, Vitest works with JSX and provides built-in test coverage. It natively supports TypeScript and JSX out of the box, while its built-in coverage feature helps track code execution across your Vite applications.

How do I start writing unit tests and mocking modules in a Vite project?

To start writing unit tests and mocking modules in a Vite project, run Vitest from your project root. This automates test authoring and mocking seamlessly, providing a fast and reliable testing environment for vanilla TS/JS or framework applications.