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test-driven-development

Enforce the red-green-refactor cycle for automated test-driven development.

3|2|Updated Oct 10, 2025
Search Tags:#testing#quality assurance#TDD#refactoring#software design#clean code#bug fixing
One-click install
npx skills add https://github.com/liauw-media/CodeAssist --skill test-driven-development-liauw-media
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: test-driven-development
Source: https://github.com/liauw-media/CodeAssist/tree/main/skills/testing/test-driven-development
Command: npx skills add https://github.com/liauw-media/CodeAssist --skill test-driven-development-liauw-media

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This skill eliminates bugs before they're written and fosters better design by enforcing the Test-Driven Development (TDD) cycle, ensuring every piece of code is backed by a failing test first. This leads to higher quality, more maintainable code and reduces refactoring fear.

Core Features & Use Cases

  • RED/GREEN/REFACTOR Cycle: Guides you through writing a failing test, implementing minimal code to pass, and then refactoring, ensuring a disciplined and safe development process.
  • Design-First Approach: Forces you to think about the desired behavior and API before writing implementation, leading to cleaner, more testable code.
  • Use Case: When adding a user registration endpoint, this skill will prompt you to write a test that expects a 201 status (RED), then write only the necessary code to make that test pass (GREEN), and finally refactor the controller for better structure while keeping the test green (REFACTOR).

Quick Start

I need to add a new feature to update user profiles. Use the test-driven-development skill to guide my implementation.

Frequently Asked Questions about test-driven-development

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

FAQPage Schema
How do I write tests before implementing code?▼

Test-driven development starts by writing a failing test that describes the desired behavior, then writing minimal code to pass it, and finally refactoring. This RED/GREEN/REFACTOR cycle ensures every feature is backed by tests from the start, improving code quality and reducing bugs.

What's the best way to ensure code quality while refactoring?▼

TDD keeps tests green throughout refactoring, giving you confidence that changes don't break functionality. By having a failing test first, you validate behavior before touching implementation, making refactoring safer and preventing regressions.

Can I use test-driven development when adding features?▼

Yes, TDD works for feature development, bug fixes, and planned tasks. Write a test expecting the new behavior, implement only what's needed to pass, then refactor. This enforces design thinking upfront and delivers cleaner, more maintainable code.

How does writing tests first improve design?▼

TDD forces you to think about desired behavior and API before implementation, naturally leading to better-designed, more testable code. This design-first approach eliminates bugs before they're written and reduces refactoring fear.

When should I use test-driven development in my workflow?▼

Apply TDD when adding features, fixing bugs, refactoring, or implementing planned tasks in projects with automated tests. It's most effective in teams prioritizing code quality and maintainability over rapid initial delivery.

Do I need existing tests to start test-driven development?▼

No, TDD works from the ground up or in existing projects. Start by writing your first failing test for any new feature or change, then follow the RED/GREEN/REFACTOR cycle. The discipline applies regardless of current test coverage.

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