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shynlee04
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test-driven-development

Guide developers through the red-green-refactor cycle for writing tested code.

Updated Feb 5, 2026
Search Tags:#code quality#testing#tdd#debugging#refactoring#development methodology
One-click install
npx skills add https://github.com/shynlee04/idumb-v2 --skill test-driven-development-shynlee04
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: test-driven-development
Source: https://github.com/shynlee04/idumb-v2/tree/main/.agent/skills%20copy/test-driven-development
Command: npx skills add https://github.com/shynlee04/idumb-v2 --skill test-driven-development-shynlee04

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill enforces the Test-Driven Development (TDD) methodology to ensure that all new code is written with corresponding tests, preventing bugs and regressions before they are introduced.

Core Features & Use Cases

  • Enforces TDD: Mandates writing failing tests before any implementation code.
  • Red-Green-Refactor Cycle: Guides the developer through the TDD workflow.
  • Use Case: When implementing a new user authentication feature, you would first write a test for the login success scenario, watch it fail, then write the minimal code to make it pass, and finally refactor.

Quick Start

Use the test-driven-development skill to implement the new user profile update functionality.

Frequently Asked Questions about test-driven-development

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

FAQPage Schema
What is the test-driven development process for writing robust code?▼

The test-driven development process mandates writing a failing test before any implementation, achieving minimal passing code, then refactoring. This red-green-refactor cycle prevents bugs and regressions during new feature development.

How do I use TDD for a new feature implementation?▼

To use TDD for a new feature, write a test for the desired scenario and watch it fail. Next, write the minimal code to make it pass, and finally refactor the code while ensuring the test still passes.

When should I apply the test-driven development methodology?▼

Apply the test-driven development methodology during all new feature development, bug fixes, and refactoring tasks. It ensures that production code is always preceded by a failing test to prevent regressions.

Does test-driven development work for fixing bugs and refactoring existing code?▼

Yes, test-driven development works for bug fixes and refactoring. You write a failing test that reproduces the bug or verifies the refactored behavior, then write code to ensure the test passes.

Why write failing tests before implementation code in TDD?▼

Writing failing tests before implementation code in TDD ensures that every piece of production code is driven by a verifiable requirement. This minimizes bugs and prevents regressions from being introduced into the system.

What are the limitations of using TDD for development methodology?▼

The TDD methodology requires strict adherence to writing tests first, which may slow initial feature velocity. However, it enforces code quality and minimizes debugging time by preventing regressions before they are introduced.

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