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test-driven-development

Enforce failing tests before coding with a Red-Green-Refactor workflow.

Updated Aug 27, 2026
Search Tags:#tdd#refactoring#red-green-refactor#quality-assurance#software-engineering#test-driven-development#testing-discipline
One-click install
npx skills add https://github.com/Sjw2005/https---gitee.com-song-jiawei-2005-yolopro --skill test-driven-development-sjw2005
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: test-driven-development
Source: https://github.com/Sjw2005/https---gitee.com-song-jiawei-2005-yolopro/tree/main/.agents/skills/test-driven-development
Command: npx skills add https://github.com/Sjw2005/https---gitee.com-song-jiawei-2005-yolopro --skill test-driven-development-sjw2005

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Test-driven development helps teams ensure new code is driven by failing tests and verified by tests before implementation, reducing regressions and clarifying requirements.

Core Features & Use Cases

  • Red-Green-Refactor workflow: write a failing test, implement minimal code to pass, and refactor safely.
  • Guardrails for feature work and bug fixes: enforce testing discipline across new code, refactoring, and behavioral changes.
  • Real-world use: when implementing any feature, module, or fix, ensure tests exist and align with expected outcomes.

Quick Start

Write a failing test for the desired behavior, then implement the minimal code to make it pass, and repeat until all tests pass.

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 workflow function?▼

Test-driven development enforces writing a failing test, implementing minimal code to pass it, and safely refactoring. The Red-Green-Refactor workflow clarifies requirements and reduces regressions by verifying expected outcomes before and after coding.

How do I start practicing test-first development for a new software feature?▼

Start test-first development by writing a failing test for the desired behavior. Implement the minimal code required to make that test pass, and repeat this cycle until all tests pass and the feature is complete.

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

Yes, test-driven development applies to bug fixes and refactoring. It enforces testing discipline by mandating failing tests first across behavioral changes, ensuring guarded refactoring that safely aligns code with expected outcomes.

What's the best way to enforce testing discipline during incremental implementation?▼

The best way to enforce testing discipline is using test-driven development to mandate minimal, incremental implementation. By forcing failing tests before coding, it guarantees that all new code and refactoring are verified by tests.

Why does test-driven development require a failing test before writing implementation code?▼

Test-driven development requires a failing test first to clarify exact requirements and prove the test detects the missing behavior. This reduces regressions by ensuring implementation code is strictly driven and verified by failing tests.

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