Why should I avoid testing mock calls?

Testing mock calls is considered an anti-pattern because it tests the implementation (how a function is called) rather than the outcome (what the software actually does for the user).

Can I use this for frontend and backend testing?

Yes, the skill includes specific assertion strategies and patterns for UI frameworks like React as well as backend languages like Python and Go.

How does this help with test maintenance?

By focusing on user-observable behavior instead of internal implementation or private methods, the tests generated are less likely to break when you refactor the underlying code.

What is the Testing Trophy model used in this skill?

The Testing Trophy is a model that prioritizes integration tests because they provide the best balance of speed and confidence by testing how multiple units work together with real dependencies.

When does this skill recommend mocking dependencies?

Mocking is reserved only for external factors that are outside your control, such as third-party APIs, payment gateways, email services, or non-deterministic values like time and randomness.

Behavior-Driven Test Writing

Name: Behavior-Driven Test Writing
Author: rileyhilliard

byrileyhilliard

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セキュリティとテスト

Implements high-confidence testing strategies using the Testing Trophy model and real dependencies to ensure code reliability.

概要

The Writing Tests skill equips Claude with a robust framework for creating test suites that prioritize real-world behavior over implementation details. By following the Testing Trophy model, this skill emphasizes integration tests that use real dependencies, ensuring that your tests provide maximum confidence and remain resilient during code refactors. It guides the AI in choosing the correct test type—E2E, integration, or unit—while providing strict mocking guidelines and assertion strategies that focus on user-observable outcomes rather than fragile internal states.

主な機能

Implements the Testing Trophy model prioritizing integration tests
Provides clear decision logic for E2E, Integration, and Unit test types
Minimizes fragile mocking by favoring real dependencies and databases
Identifies and fixes common anti-patterns like testing internal state
62 GitHub stars
Includes language-specific patterns for TypeScript, React, Python, and Go

ユースケース

Building a resilient test suite for a new feature or service
Refactoring brittle tests that break during internal implementation changes
Determining the most effective testing strategy for complex business logic

概要

主な機能

Implements the Testing Trophy model prioritizing integration tests
Provides clear decision logic for E2E, Integration, and Unit test types
Minimizes fragile mocking by favoring real dependencies and databases
Identifies and fixes common anti-patterns like testing internal state
62 GitHub stars
Includes language-specific patterns for TypeScript, React, Python, and Go

ユースケース

Building a resilient test suite for a new feature or service
Refactoring brittle tests that break during internal implementation changes
Determining the most effective testing strategy for complex business logic