unit-testing

Generate Vitest unit tests for TypeScript code using behavior-driven development.

4|Updated Feb 5, 2026
One-click install
npx skills add https://github.com/kvnwolf/devtools --skill unit-testing-kvnwolf
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: unit-testing
Source: https://github.com/kvnwolf/devtools/tree/main/plugins/base/skills/unit-testing
Command: npx skills add https://github.com/kvnwolf/devtools --skill unit-testing-kvnwolf

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill streamlines the process of writing effective unit tests, ensuring code quality and maintainability by adhering to best practices and conventions.

Core Features & Use Cases

  • Behavior-Driven Development: Encourages testing through public interfaces and observable behavior.
  • Mocking Strategy: Guides developers on when and how to mock dependencies, focusing on system boundaries.
  • Coverage Standards: Helps meet project coverage thresholds by promoting comprehensive test writing.
  • Use Case: When developing a new feature, use this Skill to generate co-located unit tests that verify the behavior of your functions and components.

Quick Start

Use the unit-testing skill to write a test for the calculateTotal function.

Frequently Asked Questions about unit-testing

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

FAQPage Schema
How do I write unit tests for TypeScript using Vitest?

Yes, behavior-driven development testing encourages verifying software through public interfaces and observable behavior. This Skill generates unit tests following BDD conventions to ensure your TypeScript code maintains robust quality and adheres to best practices for comprehensive coverage.

What is the best way to mock dependencies in Vitest?

The best way to mock dependencies in Vitest is to mock only at system boundaries. This Skill guides developers on exactly when and how to mock dependencies, ensuring that your unit tests remain maintainable and accurately reflect external interactions without over-mocking internal logic.

How do I ensure my unit tests meet project coverage thresholds?

Yes, you can use this Skill for new TypeScript feature development. It generates co-located unit tests that verify the behavior of your functions and components, streamlining the process of ensuring code quality and maintainability as you build new features.

Why mock only at system boundaries when writing unit tests?

Mocking only at system boundaries when writing unit tests prevents over-mocking internal logic and keeps test suites maintainable. This Skill guides developers to focus mocking strategies on external dependencies, ensuring tests remain robust and accurately reflect system behavior.