test-driven-development

Automate the test-driven development workflow for feature implementation.

1|Updated Apr 21, 2026

Search Tags:#testing #tdd #quality #red-green-refactor #software-engineering #cycle

Ready to run

npx skills add https://github.com/ChangZhou-xj/zxj_skill --skill test-driven-development-changzhou-xj

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: test-driven-development
Source: https://github.com/ChangZhou-xj/zxj_skill/tree/main/software-development/test-driven-development
Command: npx skills add https://github.com/ChangZhou-xj/zxj_skill --skill test-driven-development-changzhou-xj

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Test-driven development (TDD) aims to prevent defects by requiring a failing test before any production code, guiding design and catching regressions early.

Core Features & Use Cases

Enforces a strict Red-Green-Refactor cycle for new features, bug fixes, and refactors.
Encourages writing focused tests that validate behavior before implementation.
Supports iterative improvement through refactoring while keeping tests green.

Quick Start

Write a failing test first, then implement the minimal code to pass it and refactor as needed.

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 the red-green-refactor cycle work?▼

Test-driven development (TDD) prevents defects by requiring a failing test before any production code. The red-green-refactor cycle involves writing a failing test, implementing minimal code to pass it, then refactoring while keeping tests green.

How do I automate a test-driven development workflow for feature implementation?▼

Automate test-driven development by enforcing the strict red-green-refactor cycle for feature implementation. Write a focused failing test that validates behavior first, implement the minimal production code to pass it, and refactor iteratively.

Do I need a deterministic test suite to practice test-driven development?▼

Yes, a deterministic test suite is required for test-driven development. Deterministic tests ensure consistent results during the red-green-refactor cycle, allowing safe incremental design changes and reliable regression catching.

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

Yes, test-driven development applies to bug fixes and refactoring existing code. You enforce the red-green-refactor cycle by writing a failing test that reproduces the bug or validates behavior before adjusting the production code.

When should I not use a test-driven development approach?▼

Avoid test-driven development for tasks lacking deterministic behavior, as it requires a deterministic test suite. It is also less suitable for exploratory prototypes where validating behavior through unit tests is not practical before implementation.