Can this skill help with incomplete API mocks?

Yes, it enforces mirroring real API completeness by requiring mocks to include all documented fields, preventing silent downstream failures in the test environment.

How does this skill prevent production code pollution?

It identifies methods created solely for test cleanup or setup and provides guidance on moving them to dedicated test utility files, keeping the production API clean and safe.

Why is testing mock behavior discouraged?

Testing mock behavior verifies that the mock exists rather than confirming the component works, leading to a false sense of security and tests that fail to catch real regressions.

What are the core 'Iron Laws' of this testing skill?

The Iron Laws include: never test mock behavior, never add test-only methods to production classes, and never mock without fully understanding the underlying dependencies.

Does this skill integrate with Test-Driven Development (TDD)?

Absolutely. It uses TDD principles to ensure tests are written first and fail against real code before any minimal mocking is introduced.

Testing Anti-Pattern Prevention

Name: Testing Anti-Pattern Prevention
Author: flora131

byflora131

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セキュリティとテスト

Prevents brittle test suites and production code pollution by enforcing high-standard mocking and architectural testing principles.

概要

This skill acts as a strategic architectural guardrail for software testing, specifically designed to eliminate anti-patterns that lead to fragile or misleading test suites. By enforcing 'Iron Laws'—such as never testing mock behavior and keeping test-only methods out of production classes—it ensures that tests verify real business logic rather than implementation details. It provides actionable gate functions to evaluate mocking strategies, prevents incomplete API mocks that cause silent failures, and promotes a strict TDD workflow to maintain high-quality, maintainable codebases.

主な機能

Prevention of test-only method pollution in production classes
Structural verification for complete API mock responses
Detection of mock-behavior testing assertions
TDD-aligned gate functions for real-time testing guidance
Dependency analysis to ensure mocks are applied at the correct level
56 GitHub stars

ユースケース

Refactoring legacy test suites to reduce fragility and false positives
Maintaining clean production code by offloading test utilities to external helpers
Onboarding teams to high-standard unit and integration testing patterns

概要

主な機能

Prevention of test-only method pollution in production classes
Structural verification for complete API mock responses
Detection of mock-behavior testing assertions
TDD-aligned gate functions for real-time testing guidance
Dependency analysis to ensure mocks are applied at the correct level
56 GitHub stars

ユースケース

Refactoring legacy test suites to reduce fragility and false positives
Maintaining clean production code by offloading test utilities to external helpers
Onboarding teams to high-standard unit and integration testing patterns