test-driven-development

Enforce Red-Green-Refactor by requiring failing tests before coding.

69|19|Updated Jan 26, 2026

Search Tags:#testing #tdd #red-green-refactor #quality-assurance #software-engineering #unit-tests

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npx skills add https://github.com/alffei/skill_share --skill test-driven-development-alffei

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Please help me install this Agent Skill.
Skill: test-driven-development
Source: https://github.com/alffei/skill_share/tree/main/superpowers-antigravity/skills/test-driven-development
Command: npx skills add https://github.com/alffei/skill_share --skill test-driven-development-alffei

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

It helps developers drive code quality by forcing tests to fail before implementing production code, reducing bugs and improving design clarity.

Core Features & Use Cases

Red-Green-Refactor cycle: Write a failing test, implement minimal code to pass, then refactor.
Behavioral guarantees: Ensure changes are verified by automated tests before merge, supporting safe refactors and feature work.
Language-agnostic workflow: Applies to any language or framework and can be adopted incrementally.

Quick Start

Create a small failing test that describes the expected behavior.
Run the test suite to observe the failure.
Implement the minimal production code to satisfy the test.
Run tests again to confirm they pass and then refactor for readability and reliability.

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 design practice where you write a failing test, implement minimal production code to pass it, and then refactor. This red-green-refactor cycle enforces automated verification and drives code quality before behavioral changes are merged.

How do I start writing failing unit tests before implementing production code?▼

To write failing unit tests first, create a small test describing the expected behavior, run the test suite to observe the failure, implement the minimal code to satisfy the test, and then refactor for readability and reliability while confirming the tests still pass.

Can I apply test-first design to any programming language or framework?▼

Yes, you can apply test-first design across any language or framework. This language-agnostic workflow supports feature development, bug fixes, refactors, and behavioral changes, allowing you to incrementally adopt automated testing and red-green-refactor practices in any project.

When should I use TDD for bug fixes and refactoring?▼

You should use TDD for bug fixes and refactoring whenever you need behavioral guarantees and safe code changes. By requiring failing tests before coding, TDD ensures changes are verified by automated tests, reducing bugs and improving design clarity during refactors.

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

No, test-driven development does not require specific testing frameworks or dependencies. It is a language-agnostic workflow discipline that applies test-first design and automated verification principles to any existing project environment or testing setup.