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test-driven-development

Enforce a red-green-refactor test-first workflow for software development.

Updated Aug 23, 2026
Search Tags:#typescript#unit-testing#software-engineering#test-driven-development#testing-patterns#bug-fix-testing
One-click install
npx skills add https://github.com/s0341969/scheduler-project --skill test-driven-development-s0341969
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: test-driven-development
Source: https://github.com/s0341969/scheduler-project/tree/main/.codex/skills/agent-skills/skills/test-driven-development
Command: npx skills add https://github.com/s0341969/scheduler-project --skill test-driven-development-s0341969

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

TDD drives development by making tests the first step, reducing defects and regression risk.

Core Features & Use Cases

  • Enforces a red-green-refactor cycle for new and existing code
  • Provides guidelines for writing meaningful tests, managing edge cases, and reproducing bugs
  • Includes patterns like the Prove-It approach and the Test Pyramid to guide QA and maintenance

Quick Start

Write a failing test for a new behavior, implement the minimum code to pass, then 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
How do I start test-driven development for a new feature?▼

Test-driven development starts by writing a failing test for a new behavior, implementing the minimum code to pass, then refactoring while keeping tests green.

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

The red-green-refactor cycle is a test-driven workflow where you write a failing test, implement code to make it pass, and then refactor while maintaining green tests.

How do I write unit tests to reproduce a bug fix?▼

To reproduce a bug fix with unit testing, write an explicit failing test that captures the defect, then modify the code to satisfy requirements and make the test pass.

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

Test-driven development works for existing TypeScript code by enforcing the red-green-refactor cycle during logic changes, bug fixes, and feature work to reduce regression risk.

When should I use the test pyramid in software engineering?▼

Use the test pyramid in software engineering to guide QA and maintenance by structuring meaningful tests and managing edge cases when writing robust, maintainable code.

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