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test-driven-development

Enforce red-green-refactor workflow by running failing tests before implementation.

Updated Feb 5, 2026
Search Tags:#tdd#red-green-refactor#web-development#unit-testing#quality-assurance#test-driven-development
One-click install
npx skills add https://github.com/Khoiwall/be_vidify --skill test-driven-development-khoiwall
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: test-driven-development
Source: https://github.com/Khoiwall/be_vidify/tree/main/.opencode/skill/test-driven-development
Command: npx skills add https://github.com/Khoiwall/be_vidify --skill test-driven-development-khoiwall

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Ensures correct software behavior by requiring tests to fail before implementing code, preventing ambiguous changes and catching regressions early.

Core Features & Use Cases

  • Red-Green-Refactor workflow: write a failing test, make it pass with minimal code, then clean up.
  • Safety through verification: guarantees changes are validated by automated tests across features.
  • Use Case: when adding a new feature or fixing a bug, you drive design by tests first to ensure behavior matches expectations.

Quick Start

Run a failing test first to define the expected behavior, then implement just enough code to pass it.

Frequently Asked Questions about test-driven-development

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

FAQPage Schema
How does test-driven development prevent regressions in web development?▼

Test-driven development prevents regressions by requiring automated tests to fail before implementing code, ensuring changes are validated across features and catching ambiguous modifications early.

What is the red-green-refactor workflow for unit testing?▼

The red-green-refactor workflow involves writing a failing test, implementing minimal code to pass it, then cleaning up. This disciplined unit testing approach drives design and validates behavior.

How do I fix a bug using test-first development?▼

To fix a bug using test-first development, write a failing test that defines the expected behavior, then implement just enough code to pass it and validate the change against regressions.

Does test-driven development work for refactoring existing features?▼

Test-driven development works for refactoring by validating changes with automated tests first. This guards against regressions and ensures software behavior matches expectations before cleaning up code.

Why do my unit tests need to fail before writing implementation code?▼

Unit tests must fail before implementation to prove they validate the correct behavior. This test-first approach prevents ambiguous changes and ensures the test actually catches unmet requirements.

Can I use test-driven development for quality assurance on large features?▼

Test-driven development supports quality assurance for large features by enforcing test isolation and reliable execution, ensuring safety through verification and validating changes across the codebase.

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