vitest-skill

Generate Vitest unit tests for JavaScript/TypeScript Vite-native applications.

350|69|Updated Feb 17, 2026

Search Tags:#typescript #vitest #testing #unit testing #react #javascript #vue

Ready to run

npx skills add https://github.com/LambdaTest/agent-skills --skill vitest-skill

💬 Prompt for ChatGPT / Claude Chat▼

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

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill helps you write and run unit tests efficiently for JavaScript and TypeScript projects using Vitest, a modern, Vite-native testing framework.

Core Features & Use Cases

Vitest Test Generation: Create basic and advanced test structures for your code.
Mocking with vi: Learn to use Vitest's powerful mocking utilities (vi.mock, vi.fn, vi.spyOn).
Component Testing: Write tests for React and Vue components.
Use Case: You need to write unit tests for a new React component and mock its API calls. This Skill provides the necessary patterns and configuration to get started quickly.

Quick Start

Write Vitest tests for the provided React component, including mocking API calls.

Frequently Asked Questions about vitest-skill

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I write Vitest unit tests for a React component?▼

Writing Vitest unit tests for a React component involves generating a Vite-native test structure with Jest-compatible APIs. You can render the component and verify its output using snapshot testing and ESM support.

How do I mock API calls in Vitest using the vi utility?▼

Mocking API calls in Vitest utilizes the `vi.mock`, `vi.fn`, and `vi.spyOn` functions to intercept module exports. This allows you to simulate network responses and isolate components during unit testing without real network requests.

Can I use Vitest for Vue component testing?▼

Yes, Vitest supports Vue component testing natively. You can generate test structures that mount Vue components and validate their behavior using Jest-compatible APIs and ESM within Vite-native applications.

Does Vitest support snapshot testing for JavaScript and TypeScript projects?▼

Yes, Vitest supports snapshot testing for JavaScript and TypeScript projects. You can generate snapshot tests to capture component output and ensure UI consistency using Vite-native configurations.

What is the best way to configure in-source testing with Vitest?▼

Configuring in-source testing with Vitest involves embedding test blocks directly within JavaScript or TypeScript files. This leverages Vite-native HMR and ESM support to run tests alongside application code.