skills.rest
swtch1
swtch1COMMUNITY
Explore all skills by this author →
GitHub

test-driven-development

Guide software feature implementation through the Test-Driven Development Red-Green-Refactor cycle.

Updated Aug 23, 2026
Search Tags:#code quality#unit tests#testing#tdd#refactoring#bug fixing
One-click install
npx skills add https://github.com/swtch1/dotfiles --skill test-driven-development-swtch1
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: test-driven-development
Source: https://github.com/swtch1/dotfiles/tree/main/.claude/skills/test-driven-development
Command: npx skills add https://github.com/swtch1/dotfiles --skill test-driven-development-swtch1

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill ensures code quality and maintainability by enforcing the practice of writing tests before implementation, preventing bugs and improving design.

Core Features & Use Cases

  • Test-First Development: Guides the user through the Red-Green-Refactor cycle.
  • Bug Fixing: Provides a structured approach to fixing bugs with regression tests.
  • Legacy Code Testing: Enables safe refactoring of untested codebases.
  • Use Case: When starting a new feature, use this skill to write a failing test, then implement the minimal code to pass, and finally refactor with confidence.

Quick Start

Use the test-driven-development skill to write a failing test for a new function.

Frequently Asked Questions about test-driven-development

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

FAQPage Schema
What is the test-driven development process for writing new features?▼

The test-driven development process uses the Red-Green-Refactor cycle: write a failing unit test, implement minimal code to pass it, and refactor with confidence to ensure correctness.

How do I fix bugs using regression tests?▼

Fix bugs using regression tests by writing a unit test that reproduces the specific defect before altering code, ensuring the bug fixing process prevents future occurrences and maintains code quality.

Can I use TDD to safely refactor untested legacy code?▼

You can refactor untested legacy code safely by writing characterization tests first, establishing a baseline of current behavior before making changes to improve maintainability.

What's the best way to ensure code quality when implementing software features?▼

The best way to ensure code quality is enforcing test-first development, writing unit tests before implementation to prevent bugs and improve software design throughout the coding process.

When should I not use the test-first development approach?▼

You should carefully consider test-first development limitations when dealing with untested legacy code, requiring characterization tests to capture existing behavior before standard TDD can be applied effectively.

Related Skills

Explore More Software Engineering Skills→
rbaumierrbaumier
4

tdd

Enforce failing tests before production code using Red-Green-Refactor cycles.

Community
Intermediate
Cor-IncorporatedCor-Incorporated
4

tdd-workflow

Guide the RED-GREEN-REFACTOR cycle for TDD with 80%+ test coverage.

Official
Intermediate
OirancaOiranca

ci-checks

Executes lint, type-check, test, and build commands for CI validation.

Community
Intermediate
AsiaOstrichAsiaOstrich
70

ATDD 助手

Guide teams through ATDD workflows with Given-When-Then acceptance criteria.

Community
Intermediate