test-driven-development

Enforce a test-first workflow using the Red-Green-Refactor cycle.

60|4|Updated Jan 15, 2026

Search Tags:#unit tests #quality assurance #TDD #test-driven development #red-green-refactor #coding workflow #software-engineering

Ready to run

npx skills add https://github.com/dsifry/goodtogo --skill test-driven-development-dsifry

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: test-driven-development
Source: https://github.com/dsifry/goodtogo/tree/main/.claude/plugins/superpowers/skills/test-driven-development
Command: npx skills add https://github.com/dsifry/goodtogo --skill test-driven-development-dsifry

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill promotes disciplined development by guiding you to write tests before implementation, reducing bugs and regressions.

Core Features & Use Cases

Red-Green-Refactor cycle: write a failing test, make it pass, then clean up.
Test-first workflow: ensures code behavior is validated before writing production code.
Use Case: when adding a new feature or fixing a bug, start with a failing test and drive implementation from that signal.

Quick Start

Write a failing test for the new behavior, implement the minimal code to pass, then refactor for readability and maintainability.

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 test-first workflow where you write a failing test, implement minimal code to pass it, then refactor for readability. This red-green-refactor cycle reduces bugs and regressions by validating behavior before production code.

How do I start writing unit tests before implementation for a new feature?▼

To write unit tests first, create a failing test defining the new behavior, implement the minimal code required to make it pass, then refactor the code for maintainability. This test-first workflow ensures code quality during feature development.

Do I need a specific test framework to follow a test-driven development workflow?▼

Yes, you need a test framework to execute your unit tests and drive the test-driven development workflow. The approach requires a test framework to validate code behavior, run the red-green-refactor cycle, and ensure quality assurance across software projects.

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

Yes, test-driven development applies to bug fixes and refactoring across software projects. When fixing a bug, start with a failing test reproducing the issue, then drive implementation from that signal to ensure code quality and prevent regressions.

Why should I write a failing test before writing production code?▼

Writing a failing test before production code enforces disciplined development by validating expected behavior upfront. This test-first workflow reduces bugs and regressions by ensuring code behavior is validated before implementation.