test-driven-development

Write failing tests before implementation code using the red-green-refactor cycle.

Updated Mar 11, 2026

Search Tags:#code quality #TDD #development practices #test-driven-development #software-testing

Ready to run

npx skills add https://github.com/act70255/SkillsBundle --skill test-driven-development-act70255

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Please help me install this Agent Skill.
Skill: test-driven-development
Source: https://github.com/act70255/SkillsBundle/tree/main/testing/skills/test-driven-development
Command: npx skills add https://github.com/act70255/SkillsBundle --skill test-driven-development-act70255

SYSTEM DOCUMENTATION & REQUIREMENTS

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

What problem does it solve?

This Skill helps developers adopt Test-Driven Development (TDD) practices, ensuring that code is thoroughly tested and reliable, reducing the risk of bugs and improving code quality.

Core Features & Use Cases

Test-First Development: Encourages writing tests before writing implementation code.
Red-Green-Refactor Cycle: Provides a structured approach to developing code, iterating through writing a failing test, making minimal changes to pass the test, and refactoring.
Anti-Patterns and Best Practices: Offers guidance on common mistakes in testing and best practices for writing effective tests.

Quick Start

To start a new test-driven development cycle, write a failing test for the feature you want to implement.

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 it improve code quality?▼

Test-driven development is a practice where you write tests before implementation code. It improves code quality and reliability by validating features and bug fixes through comprehensive software testing.

How do I start a test-driven development cycle for a new feature?▼

To start a test-driven development cycle, write a failing test for the feature you want to implement. Then follow the Red-Green-Refactor cycle: make minimal code changes to pass the test, and finally refactor the implementation.

What is the Red-Green-Refactor cycle in software testing?▼

The Red-Green-Refactor cycle is a structured test-driven development approach. You iterate by writing a failing test, making minimal implementation changes to pass the test, and refactoring the code to ensure quality without breaking functionality.

What are common anti-patterns and mistakes when writing tests before implementation?▼

Common anti-patterns in test-driven development include writing tests that are too broad or testing multiple behaviors at once. Following best practices ensures your tests validate specific features and bug fixes effectively without creating maintenance overhead.

Do I need specific testing frameworks to adopt test-first development practices?▼

Adopting test-first development requires an understanding of testing frameworks and coding standards. While no specific frameworks are mandated, you need an environment that supports running tests to validate your implementation code and ensure reliability.