Swift Unit Testing Skill

This skill provides comprehensive guidance on writing effective unit tests using Apple's XCTest framework. It covers test-driven development (TDD), testing patterns, mocking strategies, and best practices for maintaining high-quality test suites.

Best Practices

1. Test First: Follow TDD principles - write tests before implementation.

2. Single Responsibility: Each test should verify one specific behavior.

3. Arrange-Act-Assert: Structure tests clearly with setup, execution, and verification phases.

4. Descriptive Names: Use descriptive test method names that explain what is being tested.

5. Independent Tests: Tests should not depend on each other or shared state.

6. Fast Execution: Keep tests fast to encourage frequent running.

Unit Testing Guidelines