Testing Patterns and Utilities Testing Philosophy Test-Driven Development (TDD): - Write failing test FIRST - Implement minimal code to pass - Refactor after green - Never write production code without a failing test Behavior-Driven Testing: - Test behavior, not implementation - Focus on public APIs and business requirements - Avoid testing implementation details - Use descriptive test names that describe behavior Factory Pattern: - Create functions - Provide sensible defaults - Allow overriding specific properties - Keep tests DRY and maintainable Test Utilities Custom Render Function Create…