How does this handle mocking?

It enforces a strategy of mocking only at system boundaries (like APIs or databases) while using real objects for in-process dependencies, ensuring your tests actually verify that your code works together.

Is this skill limited to a specific programming language?

No, the skill provides framework-agnostic patterns and universal testing principles that adapt their guidance based on the technology stack Claude detects in your project.

How does this skill improve Claude's testing ability?

It provides specific heuristics that prevent Claude from testing internal implementation details or over-mocking, focusing instead on observable public API behavior and critical edge cases.

What are 'tautological assertions' in AI coding?

Tautological assertions are tests that essentially compare a value against itself or use the implementation to define the expected result, meaning they can never fail even if the logic is broken. This skill identifies and corrects them.

TDD Patterns & Quality Heuristics

Name: TDD Patterns & Quality Heuristics
Author: Kiwi-Home

byKiwi-Home

0•

Security & Testing

Implements stack-aware test-driven development patterns and quality heuristics to ensure AI-generated tests are resilient, meaningful, and comprehensive.

The TDD Patterns skill equips Claude with a sophisticated framework for performing Test-Driven Development that avoids common AI pitfalls. It shifts the focus from testing implementation details to verifying public API behavior, providing specific guidance on assertion specificity, boundary coverage, and proper mocking strategies. By applying these heuristics, the skill helps developers build test suites that survive refactoring, catch real production bugs, and maintain a high ratio of error-path coverage across any technology stack.

Key Features

01System boundary mocking heuristics to ensure tests verify actual behavior.

02Stack-aware testing guidance that adapts to your specific framework and language.

03Anti-pattern detection to prevent brittle tests and tautological assertions.

04Assertion specificity scoring to move tests from simple existence checks to behavioral verification.

05Comprehensive boundary and error-path coverage checklists.

060 GitHub stars

Use Cases

01Planning robust testing strategies for complex business logic and external API integrations.

02Executing high-quality Red-Green-Refactor loops during feature development.

03Auditing existing test suites to identify and fix brittle implementation-dependent tests.

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add kiwi-home/ai-coding-resources tdd-patterns

For use in Claude.ai and ChatGPT

Download Skill