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test-driven-development

Enforce test-first design with a Red/Green/Refactor cycle.

Updated Aug 27, 2026
Search Tags:#workflow#tdd#red-green-refactor#unit-testing#software-quality#test-driven-development#coding-practice
One-click install
npx skills add https://github.com/lemessdavi/ia-prev --skill test-driven-development-lemessdavi
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: test-driven-development
Source: https://github.com/lemessdavi/ia-prev/tree/main/skills/test-driven-development
Command: npx skills add https://github.com/lemessdavi/ia-prev --skill test-driven-development-lemessdavi

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Enforces a disciplined development practice where tests drive implementation, reducing defects and easing future changes.

Core Features & Use Cases

  • Red: write a failing test for a single behavior.
  • Green: implement the minimal code to make the test pass.
  • Refactor: improve structure after tests pass to keep behavior unchanged.

Quick Start

Describe a failing test first for a new feature, then implement the minimal code to make it pass.

Frequently Asked Questions about test-driven-development

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

FAQPage Schema
What is test-driven development and how does the red-green-refactor cycle work?▼

Test-driven development (TDD) is a coding practice where you write a failing unit test before production code, implement the minimal code to make it pass (green), then refactor while keeping behavior unchanged.

How do I start writing failing tests first for a new software feature?▼

To start test-driven development, describe a failing unit test for a single behavior of your new feature, implement the minimal code required to turn the test green, and then refactor the structure to improve software quality.

Does test-driven development work for fixing bugs and modifying existing behavior?▼

Yes, test-driven development applies to feature work, bug fixes, and behavioral changes across typical software projects by enforcing test-first design constraints and clear Done Criteria for every modification.

How does writing failing tests first reduce software defects?▼

Writing failing tests first enforces a disciplined development workflow where tests drive implementation, which reduces defects, ensures reliable code, and eases future structural changes through continuous refactoring.

What are the constraints and limitations of strict test-first design?▼

Test-first design constraints require writing unit tests for single behaviors before any production code, demanding strict adherence to the red-green-refactor cycle to maintain software quality and avoid behavioral drift during refactoring.

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