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test-driven-development

Guide the RED-GREEN-REFACTOR cycle for features, bug fixes, and refactors.

Updated Mar 21, 2026
Search Tags:#testing#tdd#red-green-refactor#quality-assurance#software-engineering#test-driven-development
One-click install
npx skills add https://github.com/ironbob/SuperPower_light --skill test-driven-development-ironbob
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: test-driven-development
Source: https://github.com/ironbob/SuperPower_light/tree/main/skills/test-driven-development
Command: npx skills add https://github.com/ironbob/SuperPower_light --skill test-driven-development-ironbob

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Test-driven development helps teams write tests before production code to prevent regressions and ensure correct behavior.

Core Features & Use Cases

  • Red-Green-Refactor workflow guidance for feature work, bug fixes, and refactors.
  • Clear rules to write minimal, meaningful tests that verify behavior.
  • Encourages deterministic iteration and safer refactoring across projects.

Quick Start

Start by writing a failing test for the next feature you plan to implement, then write the minimal code to pass it.

Frequently Asked Questions about test-driven-development

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

FAQPage Schema
How does the red-green-refactor cycle work in test-driven development?▼

The red-green-refactor cycle in test-driven development starts by writing a failing test, then writing minimal production code to pass it, and finally refactoring safely. It enforces deterministic iteration and cleaner design across feature work.

What's the best way to start writing tests before production code for a new feature?▼

To start writing tests before production code, write a failing test for the next feature you plan to implement, then write the minimal code required to pass it. This ensures tests drive design and prevent regressions.

Can I use mocks for test-driven development when fixing bugs or refactoring?▼

Mocks are rejected in test-driven development for this workflow. You must write real tests that verify actual behavior, ensuring minimal production code and meaningful quality assurance during bug fixes and refactors.

Does test-driven development work for both new features and refactoring existing code?▼

Test-driven development works for new features, bug fixes, and refactoring existing code. It guides the red-green-refactor cycle to ensure safer refactoring and prevent regressions across diverse software engineering projects.

Why does test-driven development require writing a failing test first?▼

Test-driven development requires a failing test first to enforce minimal production code and ensure tests drive design. Rejecting code without failing tests prevents regressions and guarantees correct behavior through meaningful verification.

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