testing-patterns-vitest

Name: testing-patterns-vitest
Availability: InStock
Author: j0KZ

Standardize Vitest test patterns for the @j0kz/mcp-agents monorepo.

Updated Oct 1, 2025

Search Tags:#vitest #mocking #unit-testing #test-organization #testing-patterns #code-standards

Ready to run

npx skills add https://github.com/j0KZ/mcp-agents --skill testing-patterns-vitest

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: testing-patterns-vitest
Source: https://github.com/j0KZ/mcp-agents/tree/main/starter-kit/template/.claude/skills/testing-patterns-vitest
Command: npx skills add https://github.com/j0KZ/mcp-agents --skill testing-patterns-vitest

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill provides comprehensive Vitest testing conventions and patterns to standardize test structure, improve reliability, and speed up test creation across the monorepo.

Core Features & Use Cases

Test Organization: Structure tests by feature/package for clarity.
Assertion Patterns: Preset assertion styles for common return types.
Mocking Strategies: Guidance for mocks and spies to isolate units.
Coverage Guidelines: Target 75%+ coverage for critical packages.

Quick Start

Use this Skill to standardize testing in your project and quickly generate patterns for a new test file. Try: "Set up Vitest patterns for analyzer.ts".

Frequently Asked Questions about testing-patterns-vitest

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

FAQPage Schema

How do I organize and structure unit tests in a Vitest monorepo?▼

Vitest test organization uses feature-based directory structures with *.test.ts files, assertion patterns for common return types, and parallel execution across 4 threads. Group tests by package to improve clarity and maintainability across monorepo packages.

What mocking strategies should I use in Vitest for unit testing?▼

Vitest mocking isolates units through spies and mocks following preset conventions. Apply mocking guidance to control dependencies, verify function calls, and test behavior in isolation while maintaining consistent patterns across your test suite.

How do I achieve 75% code coverage in Vitest?▼

Vitest coverage targets enforce statements 75%, branches 50%, functions 60%, and lines 75%. Structure test scaffolding templates to cover critical paths, use assertion conventions for common return types, and organize suites by feature to reach and sustain coverage thresholds.

What are testing patterns and assertion conventions in Vitest?▼

Testing patterns define standardized test scaffolding templates, preset assertion styles for common return types, and mocking conventions. These patterns speed up test creation, improve reliability, and enforce consistent structure across the monorepo.

Can I use Vitest for monorepo testing with specific coverage requirements?▼

Vitest 3.2.4 supports monorepo testing with explicit coverage targets, parallel execution, and file naming conventions. This Skill applies standardized patterns to generate tests, organize suites, and debug failures while meeting 75% coverage across multiple packages.