test-driven-development

Name: test-driven-development
Availability: InStock
Author: aRustyDev

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

Updated Jan 28, 2026

Search Tags:#code quality #testing #development workflow #TDD #red-green-refactor

Ready to run

npx skills add https://github.com/aRustyDev/git-atomic --skill test-driven-development-arustydev

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: test-driven-development
Source: https://github.com/aRustyDev/git-atomic/tree/main/.claude/skills/method-tdd-dev
Command: npx skills add https://github.com/aRustyDev/git-atomic --skill test-driven-development-arustydev

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Test-driven development (TDD) ensures software behavior is defined and verified before implementing code, reducing defects and easing future changes.

Core Features & Use Cases

Red-Green-Refactor cycle: write a failing test, implement minimal production code to pass, then refactor without changing behavior.
Regression protection: tests document expected outcomes and prevent accidental regressions during refactors or feature changes.
Applicable scenarios: ideal for new features, bug fixes, performance improvements, and architectural changes where correct behavior is critical.

Quick Start

Start by writing a small failing test for a new or changed feature, implement the simplest code to pass it, run the tests, and then refactor for clarity and maintainability while keeping all tests green.

Frequently Asked Questions about test-driven-development

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

FAQPage Schema

How does test-driven development reduce bugs in a codebase?▼

Test-driven development reduces bugs by enforcing a failing test before writing production code, ensuring behavior is specified and verified from the start. This protects against regressions during future refactors or feature changes.

What is the red-green-refactor cycle in TDD?▼

The red-green-refactor cycle in TDD means writing a failing test, implementing minimal production code to pass it, and then refactoring for clarity without changing behavior. Tests must stay green throughout the refactoring phase.

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

To start writing tests first, write a small failing test describing the desired behavior, implement the simplest production code to pass it, run the tests, and then refactor for maintainability while keeping all tests green.

When should I use TDD for development workflows?▼

Use TDD for development workflows when correct behavior is critical, such as during new feature development, bug fixes, performance improvements, and architectural changes where predictable behavior and regression safety are valued.

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

Test-driven development works for refactoring existing code by using tests to document expected outcomes and prevent accidental regressions, allowing you to iterate with small refactors while keeping tests green.

Why write failing tests before implementing production code?▼

You write failing tests before implementing production code to ensure software behavior is defined and verified upfront, which reduces defects and eases future changes by providing immediate regression protection.