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test-driven-development

Drive development with a red-green-refactor workflow and test-first design.

Updated Apr 2, 2026
Search Tags:#tdd#red-green-refactor#code-quality#unit-testing#test-driven-development#bug-fix#testing-pyramid
One-click install
npx skills add https://github.com/logo-solutions/NAS-logo --skill test-driven-development-logo-solutions
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: test-driven-development
Source: https://github.com/logo-solutions/NAS-logo/tree/main/skills/test-driven-development
Command: npx skills add https://github.com/logo-solutions/NAS-logo --skill test-driven-development-logo-solutions

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Writing code without tests leaves behavior uncertain and increases risk of regressions; Test-Driven Development provides a discipline that ensures code correctness by validating it through tests.

Core Features & Use Cases

  • Red-Green-Refactor workflow: write a failing test, implement code, refactor while keeping tests green.
  • Prove-It Pattern for bug fixes: reproduce bug with tests before implementing fix.
  • Tests as specification: emphasize tests documenting expected behavior and guardrails.

Quick Start

Begin by writing a failing test for the desired behavior, then implement the minimal code to pass it, and finally refactor while keeping tests green.

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 guarantee code correctness?▼

Test-driven development is a discipline that guarantees software behavior by writing tests before implementation, proving code correctness through a red-green-refactor workflow.

How do I fix a bug using the test-first approach?▼

To fix a bug using the test-first approach, you reproduce the bug with a failing test before implementing the fix, proving the defect exists and verifying the solution corrects it.

How do I start writing unit tests using the red-green-refactor workflow?▼

Start the red-green-refactor workflow by writing a failing unit test for desired behavior, implement minimal code to pass it, then refactor while keeping tests green.

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

Yes, test-driven development works for refactoring by running existing tests as guardrails to prove code correctness across changes without introducing new regressions.

What is the testing pyramid and why does it matter for unit testing?▼

The testing pyramid is a framework emphasized during test-first design to ensure balanced test coverage, prioritizing foundational unit tests over broader, slower tests.

When should I not use test-driven development for new feature work?▼

You should avoid test-driven development when writing throwaway prototypes or exploratory spikes where long-term code correctness and behavior specification are not required.

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