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.

HardTechnical

34 practiced

Design an automated and manual security testing plan for mobile apps focused on encryption, secure storage (Keychain and Keystore), certificate pinning, local data leakage, and API authentication. Specify which checks can be automated in CI, which require manual penetration testing, and how to integrate security checks into the release workflow.

MediumTechnical

35 practiced

Propose a repeatable testing approach to detect regressions in battery usage and app performance. Include recommended tooling (for example Xcode Instruments, Android Battery Historian), how to create CI-friendly performance baselines, tolerances and thresholds, and strategies to isolate noisy measurements.

MediumTechnical

39 practiced

UI tests are slow and fragile; you must keep CI feedback fast while preserving coverage of critical flows. Propose a concrete strategy including test selection, test tagging, smoke suites, test sampling, gating rules, and when to run full regression suites to balance speed, stability, and risk.

EasyTechnical

34 practiced

What are the key accessibility tests you should include in a mobile app's testing strategy? Describe automated and manual approaches for iOS and Android, which tools you would use (for example Accessibility Inspector and TalkBack), and how to include accessibility checks in CI.

EasyTechnical

29 practiced

Given the following Swift function, write XCTest unit tests (in Swift) that cover normal cases, edge cases, and invalid input. Show test functions and assertions.

swift

func calculateDiscount(price: Double?, discountPercentage: Double) -> Double {
    guard let price = price, price > 0, discountPercentage > 0 else { return 0 }
    return price * (1 - discountPercentage / 100)
}

Aim for clarity, use XCTest methods, and avoid external dependencies.

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