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test-driven-development

Write failing tests before implementing minimal code to pass.

Updated Aug 27, 2026
Search Tags:#testing#tdd#red-green-refactor#best-practices#unit-testing#quality-assurance#software-development
One-click install
npx skills add https://github.com/cvenwu/AiFlow --skill test-driven-development-cvenwu
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: test-driven-development
Source: https://github.com/cvenwu/AiFlow/tree/main/skills/test-driven-development
Command: npx skills add https://github.com/cvenwu/AiFlow --skill test-driven-development-cvenwu

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Writing and maintaining correct software behavior is hard; TDD enforces a failing test before implementation to guard against regressions.

Core Features & Use Cases

  • Red-Green-Refactor workflow: Write a failing test, implement minimal code to pass, and refactor for clarity and maintainability.
  • Test-first discipline: Guides writing tests that exercise intended behavior before coding.
  • Safe refactoring: Encourages incremental changes with automated tests to prevent regressions.
  • Use Case: When adding a feature or fixing a bug, you start with a test that fails, then implement minimum code to satisfy the test, then clean up.

Quick Start

Write a failing test for 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
What is the red-green-refactor workflow in test-driven development?▼

The red-green-refactor workflow in test-driven development involves writing a failing test, implementing minimal code to pass it, and then refactoring for clarity. This cycle ensures immediate feedback and guards against regressions throughout software development.

How do I start fixing a bug using test-first development?▼

To start fixing a bug using test-first development, write a failing unit test that exposes the incorrect behavior. Then, implement the minimum code required to make the failing test pass, ensuring the bug is resolved without regressions.

Why should I write failing tests before implementing code?▼

You should write failing tests before implementing code to enforce correct behavior and prevent future regressions. This test-first discipline ensures your implementation is guided by intended behavior, resulting in higher quality assurance and immediate feedback.

When do I need test-driven development for refactoring?▼

You need test-driven development for refactoring when you want to make incremental changes safely without breaking existing functionality. Maintaining a green test suite allows you to clean up code for maintainability while ensuring behavior remains correct.

Does test-driven development work for both feature development and bug fixes?▼

Yes, test-driven development works for both feature development and bug fixes. By forcing a failing test before implementation, it applies uniformly across software projects to ensure correct behavior, immediate feedback, and high code quality.

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