Comprehensive Testing Strategy (Unit, Integration, UI, E2E) Questions

Comprehensive testing strategy for production mobile apps. Unit testing: testing business logic in isolation, mocking dependencies. Integration testing: testing interactions between layers and components. UI testing: testing user-facing features with appropriate frameworks. E2E testing: full user flow testing. Tools: XCTest (iOS), JUnit/Espresso (Android), Detox for cross-platform. Test coverage goals and test pyramid principles. Avoiding flaky tests, managing test data, CI/CD integration. Different testing strategies for different components.