Why does this skill require me to watch a test fail?

Watching a test fail (the Red phase) proves that the test is actually checking the intended behavior and isn't passing by accident or testing the wrong logic.

Can I use this skill for bug fixes?

Yes, the skill mandates writing a failing test that reproduces the bug before applying the fix to ensure the bug is truly resolved and won't return.

Does this skill allow for exceptions to the TDD process?

Exceptions are only permitted for throwaway prototypes, generated code, or configuration files, and typically require explicit confirmation from a human partner.

What is the 'Iron Law' of this TDD skill?

The Iron Law states that no production code should be written without a failing test first. If code is written before a test, it must be deleted and rewritten after the test is established.

What should I do if a test is too hard to write?

A hard-to-write test usually signals a design issue. The skill suggests simplifying the interface, improving the design, or using dependency injection to make the code more testable.

Test-Driven Development (TDD)

Name: Test-Driven Development (TDD)
Author: ed3dai

byed3dai

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보안 및 테스팅

Enforces a strict Red-Green-Refactor workflow to ensure high-quality code through mandatory failing tests before implementation.

The Test-Driven Development (TDD) skill provides a disciplined framework for writing robust, reliable software by mandating that tests are written and verified to fail before any production code is authored. By following the 'Iron Law' of TDD, this skill helps developers avoid regressions, document behavior through tests, and ensure that every line of code serves a verified purpose. It guides the user through the complete cycle of writing minimal failing tests, implementing the simplest passing code, and refactoring for clean architecture, ultimately reducing debugging time and technical debt.

주요 기능

01Comprehensive guidance for bug fixes and refactoring

02Strict minimal implementation rules to prevent over-engineering

03Verification of test failure to ensure test validity

04Mandatory Red-Green-Refactor cycle enforcement

05Troubleshooting for common TDD rationalizations and roadblocks

065 GitHub stars

사용 사례

01Implementing new features with high confidence and verified test coverage

02Safely refactoring legacy codebases by establishing a test-first safety net

03Fixing bugs by reproducing them with a failing test before applying a fix

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add ed3dai/ed3d-plugins-testing test-driven-development

For use in Claude.ai and ChatGPT

Download Skill