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test-driven-development

Enforce the Red-Green-Refactor cycle by writing failing tests before production code.

Updated Nov 14, 2025
Search Tags:#code quality#testing#tdd#debugging#software development#agile
One-click install
npx skills add https://github.com/ernitpt/ernit_test --skill test-driven-development-ernitpt
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: test-driven-development
Source: https://github.com/ernitpt/ernit_test/tree/main/.agent/skills/test-driven-development
Command: npx skills add https://github.com/ernitpt/ernit_test --skill test-driven-development-ernitpt

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill enforces a rigorous Test-Driven Development (TDD) process, ensuring that all production code is written only after a failing test has been created, thereby preventing bugs and improving code reliability.

Core Features & Use Cases

  • Enforces TDD Cycle: Guides users through the Red-Green-Refactor cycle.
  • Prevents Regressions: Ensures new code is tested before implementation, catching bugs early.
  • Use Case: When developing a new feature, always write a test that describes the desired behavior first. Then, write the minimal code to make that test pass, followed by refactoring.

Quick Start

Always write a failing test before writing any new implementation code.

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 cycle in test-driven development?▼

The Red-Green-Refactor cycle in test-driven development mandates writing a failing test, creating minimal code to pass it, and then refactoring. This ensures code quality and prevents regressions during software development.

How do I prevent regressions when writing new features?▼

To prevent regressions when writing new features, enforce test-driven development by creating a failing test that describes desired behavior before writing any production code. This catches bugs early and ensures reliability.

Can I use test-driven development for bug fixes and refactoring?▼

Yes, you can apply test-driven development to bug fixes and refactoring. The methodology mandates creating a failing test describing the desired behavior before modifying production code, ensuring reliability across all software development tasks.

What's the best way to start test-driven development for a new feature?▼

The best way to start test-driven development is to write a test that describes the desired behavior first. Ensure the test fails, then write the minimal production code required to make it pass before refactoring.

Why does test-driven development require writing a failing test first?▼

Test-driven development requires writing a failing test first to validate that the test works and the feature is missing. This enforces the Red-Green-Refactor cycle, preventing bugs and ensuring new code is tested immediately.

Does test-driven development work for agile software development?▼

Test-driven development works effectively for agile software development by ensuring code quality and preventing regressions. It guides developers through the Red-Green-Refactor cycle for iterative feature delivery and refactoring.

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