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test-driven-development

Enforce a red-green-refactor workflow with failing tests before production code.

7.6k|721|Updated Mar 20, 2026
Search Tags:#workflow#tdd#red-green-refactor#unit-testing#quality-assurance#test-driven-development#software-testing
One-click install
npx skills add https://github.com/jnMetaCode/superpowers-zh --skill test-driven-development-jnmetacode
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: test-driven-development
Source: https://github.com/jnMetaCode/superpowers-zh/tree/main/skills/test-driven-development
Command: npx skills add https://github.com/jnMetaCode/superpowers-zh --skill test-driven-development-jnmetacode

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Test-driven development (TDD) helps teams write failing tests first, guiding design and ensuring changes do not regress functionality.

Core Features & Use Cases

  • Enforces the red-green-refactor cycle to improve reliability.
  • Encourages writing focused tests for new features and bug fixes.
  • Use Case: when adding a feature or refactoring, start with a failing test to define expected behavior.

Quick Start

Start by writing a failing test that expresses the desired behavior, then implement the minimal code to make it pass.

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 improve software quality?▼

Test-driven development improves software quality by enforcing a test-first workflow where you write failing tests before production code, ensuring changes satisfy defined behavior and preventing functionality regressions.

How do I start writing unit tests using the red-green-refactor cycle?▼

To start the red-green-refactor cycle, write a failing unit test expressing desired behavior, implement minimal code to pass it, then refactor while maintaining test coverage for new features or bug fixes.

Can I use test-driven development for fixing bugs and refactoring?▼

Yes, test-driven development supports fixing bugs and refactoring by requiring a failing test defining expected behavior first, then making minimal implementation changes to pass the test within the red-green-refactor workflow.

What is the best way to ensure code changes do not regress existing functionality?▼

The best way to prevent functionality regression is adopting test-driven development, writing focused failing tests before implementing changes to validate expected behavior across your software project.

When should I not use a test-first development workflow?▼

A test-first development workflow may not suit exploratory prototyping where behavior is undefined, as test-driven development requires clear expected behavior to create failing tests before writing minimal production code.

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