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test-driven-development

Enforce the red-green-refactor cycle with failing tests before production code.

66|20|Updated Dec 30, 2025
Search Tags:#TDD#red-green-refactor#code-quality#unit-testing#software-engineering#test-first#development-process
One-click install
npx skills add https://github.com/cooker/wxHm --skill test-driven-development-cooker
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: test-driven-development
Source: https://github.com/cooker/wxHm/tree/main/.cursor/skills/test-driven-development
Command: npx skills add https://github.com/cooker/wxHm --skill test-driven-development-cooker

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This skill guides teams to adopt test-driven development, ensuring features start with verifiable expectations and preventing regressive changes by requiring tests before implementation.

Core Features & Use Cases

  • Red-Green-Refactor cycle as the standard workflow for feature or bugfix work.
  • Early validation of behavior through tests, reducing debugging time and design drift.
  • Use Case: When adding a new feature, write a failing test, implement the minimal code to pass, then refactor for clarity and maintainability.

Quick Start

Tell an AI to demonstrate a complete TDD cycle by writing a failing unit test for a small function, then implement the minimal production code to pass the test, and refactor for readability.

Frequently Asked Questions about test-driven-development

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

FAQPage Schema
How do I start writing unit tests before production code?▼

To start test-first development, write a failing unit test for a small function, implement the minimal production code to pass it, then refactor for readability. This enforces the red-green-refactor cycle.

What is the red-green-refactor cycle in software engineering?▼

The red-green-refactor cycle is a test-driven development workflow where you write a failing test, implement minimal code to pass it, then refactor for clarity. It ensures early validation of behavior during feature development.

How does test-driven development prevent regressive changes during refactoring?▼

Test-driven development prevents regressive changes by requiring verifiable failing tests before implementation. This early validation ensures existing behavior remains intact when you refactor code for maintainability.

Can I use test-first development for bug fixes and new features?▼

Yes, test-first development is applied during both feature development and bug fixes. It guides teams to write failing tests that define the expected behavior before writing any production code.

When should I not use the test-driven development process?▼

The test-driven development process requires writing failing tests before coding and minimal incremental implementations. It may not suit rapid prototyping or exploratory coding where immediate behavior validation is unnecessary.

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