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.