skills.rest
vietlinhh02
vietlinhh02COMMUNITY
Explore all skills by this author →
GitHub

Test-Driven Development (TDD)

Guides developers through the Red-Green-Refactor cycle for writing tests before implementation.

Updated Dec 30, 2025
Search Tags:#testing#tdd#quality assurance#methodology#software development#agile
One-click install
npx skills add https://github.com/vietlinhh02/cogninote --skill test-driven-development-tdd-vietlinhh02
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: Test-Driven Development (TDD)
Source: https://github.com/vietlinhh02/cogninote/tree/main/.claude/skills/methodology/test-driven-development
Command: npx skills add https://github.com/vietlinhh02/cogninote --skill test-driven-development-tdd-vietlinhh02

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill enforces a rigorous development methodology that prevents bugs, improves code design, and ensures reliable software by requiring tests to be written before any implementation code.

Core Features & Use Cases

  • Red-Green-Refactor Cycle: Guides developers through the core TDD loop.
  • Strict Rule Enforcement: Mandates that no production code is written without a preceding failing test.
  • Test Quality Standards: Outlines best practices for writing effective, maintainable tests.
  • Use Case: When developing a new user authentication feature, TDD ensures that tests for valid login, invalid credentials, and edge cases are written first, guaranteeing the feature works as intended before it's even implemented.

Quick Start

Follow the Red-Green-Refactor cycle to implement new functionality.

Frequently Asked Questions about Test-Driven Development (TDD)

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

FAQPage Schema
How do I start writing tests before implementation to prevent bugs?▼

The Red-Green-Refactor cycle guides developers through the core TDD loop for new features, bug fixes, and refactoring. It mandates writing a failing test first, then implementation code, and finally refactoring.

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

The Red-Green-Refactor cycle is the core TDD loop where you write a failing test, implement code to pass it, and then refactor. This strict methodology ensures reliable software and prevents bugs by enforcing tests before implementation.

Can I use TDD methodology for fixing bugs and refactoring existing code?▼

Yes, TDD supports new feature development, bug fixes, and refactoring with strict adherence to testing principles. It mandates writing tests before implementation to ensure reliable software and prevent regressions.

Why does writing tests first improve code quality in agile development?▼

Writing tests first improves code quality and prevents bugs by enforcing a rigorous development methodology. It ensures reliable software by requiring tests to be written before any implementation code is added.

Does strict test-driven development allow writing production code without a failing test?▼

No, strict rule enforcement mandates that no production code is written without a preceding failing test. This guarantees reliable software by validating all implementation code through the Red-Green-Refactor cycle.

Related Skills

Explore More Software Engineering Skills→
elophantoelophanto
116

test-driven-development

Enforce the Red-Green-Refactor cycle requiring failing tests before implementation.

Community
Advanced
forcedotcomforcedotcom
803

running-apex-tests

Execute Salesforce Apex unit tests with coverage analysis and failure diagnosis.

Official
Advanced
npc-chrisnpc-chris
1

ship

Automate code deployment by merging, testing, reviewing, and pushing changes.

Community
Advanced
mikemylmikemyl
1

testing

Implement behavior-driven testing patterns through public APIs.

Community
Intermediate