test-driven-development

Enforce a test-first workflow with failing tests before coding and refactoring.

14|2|Updated Mar 29, 2026

Search Tags:#workflow #testing #tdd #quality #refactor #best-practices

Ready to run

npx skills add https://github.com/gquthier/CLAWG --skill test-driven-development-gquthier

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: test-driven-development
Source: https://github.com/gquthier/CLAWG/tree/main/skills/software-development/test-driven-development
Command: npx skills add https://github.com/gquthier/CLAWG --skill test-driven-development-gquthier

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

TDD provides a disciplined approach that ensures code changes are guided by concrete tests, reducing regressions and increasing confidence.

Core Features & Use Cases

Enforce test-first development for new features and bug fixes.
Guide red-green-refactor cycles to ensure maintainable, well-tested codebases.
Applicable to various languages and stacks with a clear incremental workflow.

Quick Start

Initiate a TDD cycle by writing a failing test first, then implement the minimal code to pass it, and finally refactor.

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 workflow requiring a failing test first, implementing minimal code to pass it, and then refactoring. This red-green-refactor cycle ensures changes are guided by concrete tests, reducing regressions and increasing code reliability.

How do I start writing tests first when adding a new feature or fixing a bug?▼

To start writing tests first, initiate a test-driven development cycle by writing a failing test that defines the desired behavior. Then implement the smallest amount of code to pass the test, followed by a refactor pass to maintain code quality.

Can I apply test-driven development with pytest and any programming language?▼

Yes, test-driven development is applicable to various languages and stacks. The workflow is compatible with standard test runners like pytest, providing a clear incremental approach for feature development, bug fixing, and refactoring across any project.

Does test-driven development work for refactoring existing codebases?▼

Yes, test-driven development applies to refactoring scenarios. By enforcing a test-first workflow, it guides incremental implementation and ensures maintainability, giving you confidence that your refactoring changes do not introduce regressions.

Why should I write a failing test before coding instead of testing afterwards?▼

Writing a failing test before coding ensures your test actually validates the new behavior. This test-first workflow provides a disciplined approach, reducing regressions and increasing confidence that your implementation meets the concrete requirements.