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testing-with-vitest

Guide Vitest 4.x testing with migration, configuration, and optimization.

1|Updated Jan 7, 2026
Search Tags:#automation#vitest#testing#unit testing#testing frameworks
One-click install
npx skills add https://github.com/sumik5/sumik-llm-plugin --skill testing-with-vitest-sumik5
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: testing-with-vitest
Source: https://github.com/sumik5/sumik-llm-plugin/tree/main/plugins/web/skills/testing-with-vitest
Command: npx skills add https://github.com/sumik5/sumik-llm-plugin --skill testing-with-vitest-sumik5

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill requires vitest, playwright, and includes scripts (resource) and references (resource) components.

What problem does it solve?

This Skill streamlines the testing process for applications using Vitest, offering comprehensive guides for configuration, migration, and optimization, reducing the complexity of setting up and running tests.

Core Features & Use Cases

  • V4 Migration Guide: Simplifies the migration from Vitest v3 to v4, addressing breaking changes and compatibility issues.
  • Advanced Configuration: Provides detailed configuration options for environments, coverage, reporters, and performance tuning.
  • Browser Mode Support: Facilitates browser-based testing and visual regression with Playwright.
  • Fixture Management: Offers advanced fixture management with test.extend() and test context manipulation.
  • Lifecycle Hooks: Guides the use of lifecycle hooks like aroundEach, aroundAll, beforeEach, and afterEach.

Quick Start

Run the skill by executing the command: use testing-with-vitest. This will activate the Vitest testing environment with the specified configurations and ready you for automated testing and optimization.

Frequently Asked Questions about testing-with-vitest

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

FAQPage Schema
How do I migrate my testing setup from Vitest v3 to v4?▼

To migrate from Vitest v3 to v4, you must address breaking changes and compatibility issues. This guide provides a dedicated V4 migration path to transition your testing setup efficiently.

What are the Node.js and Vite version requirements for Vitest 4.x?▼

Vitest 4.x requires Node.js version 20.0.0 or higher and Vite version 6.0.0 or higher. Ensuring your environment meets these prerequisites is essential before executing automated tests.

Can I use Vitest for browser-based testing and visual regression?▼

Yes, you can use Vitest for browser-based testing and visual regression. By integrating Playwright, this setup facilitates comprehensive browser mode support and visual validation for your tests.

How do I manage advanced fixtures with test.extend in Vitest?▼

Advanced fixture management in Vitest uses `test.extend()` and test context manipulation. This allows you to customize test environments and share reusable setup logic across your unit tests efficiently.

What is the best way to configure lifecycle hooks like aroundEach in Vitest?▼

Configuring lifecycle hooks like `aroundEach`, `aroundAll`, `beforeEach`, and `afterEach` allows precise control over test execution. This guide details how to structure these hooks for optimal testing workflows.

How do I optimize Vitest configuration for performance and coverage?▼

Optimizing Vitest configuration involves tuning environments, coverage settings, and reporters. This guide provides detailed configuration options to maximize performance tuning and improve test execution.

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