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test-driven-development

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

Updated Mar 2, 2026
Search Tags:#tdd#red-green-refactor#unit-testing#quality-assurance#software-engineering#test-driven-development
One-click install
npx skills add https://github.com/FerranGuardia/claude-autonomous-setup --skill test-driven-development-ferranguardia
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: test-driven-development
Source: https://github.com/FerranGuardia/claude-autonomous-setup/tree/main/skills/testing/tdd-guide
Command: npx skills add https://github.com/FerranGuardia/claude-autonomous-setup --skill test-driven-development-ferranguardia

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

TDD helps engineers avoid regression and ensures code behavior aligns with tests by requiring tests before production code.

Core Features & Use Cases

  • Red-Green-Refactor cycle: fail a test, implement minimum code, refactor safely.
  • Test-first discipline: defines behavior before implementation and documents intent.
  • Use Cases: feature development, bug fixes, and refactoring with confidence.

Quick Start

Write a failing test that captures the desired behavior, then implement the minimal code to pass the test and refactor for clarity.

Frequently Asked Questions about test-driven-development

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
What is the test-driven development workflow for writing unit tests?▼

Test-driven development enforces a tests-first workflow using the Red-Green-Refactor cycle to ensure code correctness. You write a failing test capturing desired behavior, implement minimal code to pass, then refactor safely for clarity.

How do I use the Red-Green-Refactor cycle when developing new features?▼

To apply the Red-Green-Refactor cycle to feature development, write a failing test that defines the expected behavior, implement the minimum production code required to pass that test, and finally refactor the code safely.

Can I apply test-first discipline when fixing bugs and refactoring?▼

Yes, test-first discipline applies directly to bug fixes and refactoring by defining behavior through tests before changing production code. This ensures code correctness and allows you to refactor with confidence across projects of all sizes.

Why should I write tests before production code instead of after?▼

Writing tests before production code ensures behavior aligns with requirements and prevents regression. Test-driven development documents intent clearly and provides fast feedback, guaranteeing the implementation meets the defined test criteria.

Does test-driven development work for large software engineering projects?▼

Test-driven development applies to software engineering projects of all sizes. It satisfies requirements for disciplined practice and clear test guidance, helping engineers avoid regression and maintain code correctness across complex codebases.

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