writing-tests

When writing integration tests, you should use real dependencies instead of mocks to verify actual behavior. Mocking guidelines emphasize testing real interactions to achieve high confidence in your code's user-observable behavior.

When writing tests, you should avoid the anti-pattern of testing mocks themselves. Instead, use real dependencies to verify actual behavior, ensuring your assertions focus on user-observable outcomes rather than mock implementation details.

The Testing Trophy model works for TypeScript and React testing by prioritizing integration tests. This Skill provides language-specific patterns for TypeScript and React to help you write high-confidence tests across these frameworks.

Writing assertions for UI, API, and library tests requires focusing on user-observable behavior. This Skill offers best practices on what to assert in different contexts, ensuring your tests verify high-confidence outcomes.

You should avoid mocking dependencies in most test scenarios to prevent testing mocks instead of behavior. Mocking guidelines suggest using real dependencies primarily, reserving mocks for specific scenarios where external boundaries require isolation.