test-driven-development

Guide developers through the Red-Green-Refactor cycle for Test-Driven Development.

Updated Aug 23, 2026

Search Tags:#tdd #test-driven-development #development-methodology #coding-practices #software-testing

Ready to run

npx skills add https://github.com/elysiaerica/ai_context_vault --skill test-driven-development-elysiaerica

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: test-driven-development
Source: https://github.com/elysiaerica/ai_context_vault/tree/main/.codex/AGENT%20SKILLS/superpowers-main/skills/test-driven-development
Command: npx skills add https://github.com/elysiaerica/ai_context_vault --skill test-driven-development-elysiaerica

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) and references (resource) components.

What problem does it solve?

This Skill provides a guide for Test-Driven Development (TDD), helping developers write tests before code to ensure functionality and catch issues early.

Core Features & Use Cases

Test-Driven Development Methodology: A structured approach to software development that starts with writing tests.
Red-Green-Refactor Cycle: Writing a failing test, making minimal changes to pass it, and then refactoring the code.
When to Use: For new features, bug fixes, refactoring, and behavior changes.
Avoiding Anti-Patterns: Offers guidelines to avoid common pitfalls in testing and development.
Use Case: When developing a new feature in a web application, use this Skill to create a failing test before writing any implementation code.

Quick Start

Start with the TDD cycle: write a failing test, make the code pass, then refactor. Follow the Red-Green-Refactor pattern for every feature or bugfix.

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 methodology and how does it work?▼

Test-driven development is a software development methodology where you write unit tests before implementation code. It works through the Red-Green-Refactor cycle: write a failing test, make minimal code changes to pass it, then refactor.

How do I start writing tests before code for a new feature?▼

To start writing tests before code, follow the Red-Green-Refactor pattern for your new feature. Create a failing unit test that defines the desired behavior, write the minimal implementation to pass it, and then refactor the code.

When should I use test-driven development for software testing?▼

Use test-driven development for software testing when developing new features, fixing bugs, refactoring existing code, or implementing behavior changes. It helps catch issues early and ensures functionality through comprehensive unit testing.

What are common anti-patterns to avoid in test-driven development?▼

Common anti-patterns in test-driven development include writing tests after implementation and overcomplicating initial test logic. Avoid these pitfalls by strictly following the Red-Green-Refactor cycle and writing minimal code to pass tests.

Do I need prerequisite knowledge to apply test-driven development practices?▼

Yes, applying test-driven development practices requires an understanding of basic programming and TDD principles. You need foundational coding knowledge to write effective unit tests and implement the Red-Green-Refactor cycle.