test-driven-development

Name: test-driven-development
Availability: InStock
Author: ed3dai

Guide developers through the red-green-refactor cycle with failing tests before implementation.

5|1|Updated Jan 26, 2026

Search Tags:#TDD #red-green-refactor #code-quality #unit-testing #software-engineering #test-driven-development

Ready to run

npx skills add https://github.com/ed3dai/ed3d-plugins-testing --skill test-driven-development-ed3dai

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Please help me install this Agent Skill.
Skill: test-driven-development
Source: https://github.com/ed3dai/ed3d-plugins-testing/tree/main/plugins/ed3d-plan-and-execute/skills/test-driven-development
Command: npx skills add https://github.com/ed3dai/ed3d-plugins-testing --skill test-driven-development-ed3dai

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This skill guides developers through the test-driven development loop by enforcing a failing test before implementation.

Core Features & Use Cases

Red-Green-Refactor workflow: write a failing test, implement minimal code to pass, then refactor with confidence.
Applies to feature development, bug fixes, and refactoring tasks across typical software projects.
Documents and reinforces disciplined testing habits for teams and individuals.

Quick Start

Create a failing test that captures the desired behavior.
Implement the minimal code to make the test pass.
Refactor to improve structure while keeping all tests green.

Frequently Asked Questions about test-driven-development

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

FAQPage Schema

How does test-driven development improve code quality?▼

Test-driven development improves code quality by enforcing a failing test before implementation, ensuring your code reliably meets behavioral requirements through the red-green-refactor cycle.

What is the red-green-refactor cycle in unit testing?▼

The red-green-refactor cycle in unit testing is a workflow where you write a failing test, implement minimal code to pass it, then refactor to improve structure while keeping all tests green.

How do I start writing tests first for a new software feature?▼

To start writing tests first for a new software feature, create a failing unit test that captures the desired behavior, implement the minimal code to make it pass, then refactor with confidence.

Do I need a specific test runner to use test-driven development?▼

You do not need a specific test runner to use test-driven development. It works across standard software projects using common testing frameworks, requiring only a basic node/npm project setup.

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

You can use test-driven development for bug fixes and refactoring by writing a failing test that reproduces the bug or verifies the new structure before changing the implementation code.

When should I not use a tests-first approach?▼

You should avoid a tests-first approach for exploratory prototyping where behavior is undefined, as test-driven development enforces specifying expected behavior through a failing test before writing any implementation code.