Is accessibility testing included in these patterns?

Yes, the skill considers shipping UI without accessibility testing an anti-pattern and prioritizes accessible queries (like getByRole) for testing components.

What is the primary goal of the Testing Anti-Patterns skill?

The primary goal is to ensure tests verify real application behavior rather than the behavior of mocks, resulting in more stable and meaningful test suites.

Does this skill help with frontend framework refactoring?

Yes, by discouraging testing of internal state or props and encouraging testing of user-visible outcomes (like ARIA roles and text), tests become resilient to framework-level refactoring.

Why is 'incomplete mocking' considered an anti-pattern?

Partial mocks hide structural assumptions; if downstream code depends on a field you didn't mock, the test might pass while the real integration fails silently. This skill mandates complete schema mirroring.

How does this skill handle test-only methods in production code?

It enforces a strict rule against adding test-only methods to production classes, instead guiding developers to place that logic in dedicated test utilities or mock handlers.

Testing Anti-Patterns

Name: Testing Anti-Patterns
Author: samjhecht

bysamjhecht

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보안 및 테스팅

Enforces robust testing standards by preventing brittle mocks, production code pollution, and implementation-detail testing.

The Testing Anti-Patterns skill serves as a quality gate for developers using Claude Code, ensuring that test suites remain maintainable and meaningful. It enforces 'Iron Laws' of testing, such as verifying real behavior instead of mock existence, keeping production classes clean of test-only methods, and prioritizing user-visible outcomes over internal component state. By guiding the AI to avoid common pitfalls like partial mocks and incomplete dependency mapping, this skill helps teams build resilient test suites that survive refactoring and provide genuine confidence in software stability.

주요 기능

01Prioritizes accessible, user-centric queries over internal implementation details.

02Blocks the pollution of production classes with test-specific lifecycle methods.

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04Ensures mock data structures are complete and mirror real-world API schemas.

05Prevents assertions on mock existence to focus on real component behavior.

06Mandates accessibility (a11y) testing and full UI state coverage.

사용 사례

01Audit and cleanup of legacy production codebases containing test-only helper methods.

02Standardizing testing protocols across a team to ensure consistent mock behavior and dependency handling.

03Refactoring frontend components from state-based to context-based logic without breaking tests.

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add samjhecht/wrangler testing-anti-patterns

For use in Claude.ai and ChatGPT

Download Skill