test-driven-development

Guide developers through the RED-GREEN-REFACTOR cycle for implementing Test-Driven Development practices.

2|Updated Jan 24, 2026

Search Tags:#testing #tdd #software-quality #test-driven-development #coding-practices

Ready to run

npx skills add https://github.com/jtsang4/efficient-coding --skill test-driven-development-jtsang4

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: test-driven-development
Source: https://github.com/jtsang4/efficient-coding/tree/main/skills/test-driven-development
Command: npx skills add https://github.com/jtsang4/efficient-coding --skill test-driven-development-jtsang4

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) and references (resource) components.

What problem does it solve?

This Skill helps enforce the Test-Driven Development (TDD) methodology, ensuring code quality and robustness through rigorous testing.

Core Features & Use Cases

Failing Tests: Starts with writing a test that will fail.
Green Tests: Writes minimal code to pass the failing test.
Refactoring: Refactors code to improve it without breaking the tests.
Use Case: Ideal for developing new features, fixing bugs, or refactoring existing code.

Quick Start

Run the test to ensure it fails, then implement the feature to pass the test.

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 is a coding practice where you write a failing test, implement minimal code to pass it, and then refactor. The RED-GREEN-REFACTOR cycle enforces this sequence to ensure software quality and robust correctness.

How do I start implementing test-driven development for a new software feature?▼

To start test-driven development for a new feature, first write a failing test that defines the desired behavior. Next, write the minimal amount of code required to pass that test, and finally refactor the code to improve clarity without breaking it.

Can I use test-driven development for bug fixing and refactoring existing code?▼

Yes, test-driven development is ideal for fixing bugs and refactoring existing code. By writing a failing test that reproduces the bug first, you ensure your subsequent code changes fix the issue reliably without introducing new errors.

When should I not use test-driven development practices?▼

You should avoid test-driven development for trivial changes or exploratory spikes where high assurance of correctness is unnecessary. It is designed for programming tasks requiring robust software quality and minimal error through rigorous testing.

What is the best way to ensure code reliability and clarity through testing?▼

The best way to ensure code reliability and clarity is adhering to the test-driven development cycle. By writing failing tests first and refactoring only after tests pass, you enforce clean, robust code with minimal errors.

Does test-driven development require specific testing frameworks or dependencies?▼

Test-driven development does not require specific testing frameworks or dependencies. It is a methodology focusing on the RED-GREEN-REFACTOR cycle, making it applicable across various programming tasks and tech stacks.