Can it assist with snapshot testing?

Yes, it provides patterns for both file-based snapshots and inline snapshots to track UI and data structure changes over time.

Does it support browser-based testing environments?

Absolutely. It includes setup instructions for Happy-DOM and JSDOM, allowing you to simulate browser environments for component and DOM testing.

Can this skill help me migrate from Jest to Vitest?

Yes, it provides a structured migration path including package replacement, script updates, and configuration conversion from jest.config.js to vitest.config.ts.

Is it compatible with Bun?

Yes, the skill includes optimized commands for the Bun runtime, including installation and execution via bunx.

How does it handle code coverage?

The skill helps you configure either v8 (recommended for speed) or Istanbul providers, set coverage thresholds, and generate reports in formats like HTML or LCOV.

Vitest Testing

Name: Vitest Testing
Author: laurigates

bylaurigates

•

Security & Testing

Streamlines unit and integration testing for JavaScript and TypeScript projects using the high-performance Vitest runner.

About

The Vitest Testing skill equips Claude with specialized knowledge to manage modern testing workflows in Vite-native environments. It provides comprehensive guidance on setting up test suites, writing robust assertions, and implementing advanced mocking for modules, timers, and globals. Whether you are performing a complex migration from Jest, configuring code coverage thresholds with v8, or utilizing UI mode for visual debugging, this skill ensures your JavaScript and TypeScript applications maintain high code quality through fast, ESM-native testing patterns.

Key Features

3 GitHub stars
Jest-compatible API providing a low-friction migration path for legacy test suites.
First-class TypeScript support with native ESM execution and no transpilation required.
Vite-native integration for seamless configuration and instant HMR-powered watch mode.
Built-in coverage reporting using v8 or Istanbul with customizable success thresholds.
Comprehensive mocking suite for functions, modules, timers, and global objects.

Use Cases

Initializing and configuring test environments for new Vite-based frontend or backend projects.
Migrating existing Jest test suites to Vitest to improve execution speed and ESM compatibility.
Automating complex integration tests involving asynchronous API calls and snapshot comparisons.

About

Key Features

3 GitHub stars
Jest-compatible API providing a low-friction migration path for legacy test suites.
First-class TypeScript support with native ESM execution and no transpilation required.
Vite-native integration for seamless configuration and instant HMR-powered watch mode.
Built-in coverage reporting using v8 or Istanbul with customizable success thresholds.
Comprehensive mocking suite for functions, modules, timers, and global objects.

Use Cases

Initializing and configuring test environments for new Vite-based frontend or backend projects.
Migrating existing Jest test suites to Vitest to improve execution speed and ESM compatibility.
Automating complex integration tests involving asynchronous API calls and snapshot comparisons.