# Android Testing Advanced (Android)

> 고급 Android 테스트: TDD, mocking, Coroutines, Flow, Compose UI, 테스트 커버리지

- 18 면접 질문
- Senior
- [면접 질문: Android](https://sharpskill.dev/ko/technologies/android/interview-questions.md)

## 1. 테스트에서 Mock, Stub, Fake의 차이는 무엇인가요?

**답변**

Mock은 상호작용(누가 무엇을, 몇 번, 어떤 인자로 호출했는지)을 검증합니다. Stub은 검증 없이 미리 정의된 응답을 반환합니다. Fake는 단순화된 동작 구현(예: 인메모리 리포지토리)입니다. Mock은 behavior verification에, Stub은 state verification에, Fake는 가볍고 현실적인 대안에 사용됩니다.

## 2. Kotlin에서 mocking을 위해 MockK를 어떻게 사용하나요?

**답변**

MockK는 Kotlin 중심입니다: mockk<T>()로 double을 생성하고, every { ... } returns ...로 응답을 스텁하며, verify { ... }로 상호작용을 검증합니다. 코루틴(coEvery/coVerify), relaxed mocks, slot을 통한 인자 캡처를 지원합니다.

## 3. TDD(Test-Driven Development)란 무엇인가요?

**답변**

TDD는 코드보다 테스트를 먼저 작성하고 Red‑Green‑Refactor를 반복하는 것입니다: 실패하는 테스트, 통과시킬 최소한의 코드, 그 후 동작을 바꾸지 않고 리팩터링. 이점: 더 나은 커버리지, 테스트하기 쉬운 설계, 살아있는 문서.

## 15개 추가 질문 이용 가능

- runTest로 코루틴을 어떻게 테스트하나요?
- Flow를 어떻게 테스트하나요?

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## 기타 Android 면접 주제

- [Android 기초](https://sharpskill.dev/ko/technologies/android/interview-questions/android-fundamentals.md): 24개 질문, Junior
- [Android UI 및 리소스](https://sharpskill.dev/ko/technologies/android/interview-questions/android-ui-and-resources.md): 30개 질문, Junior
- [Android 생명주기](https://sharpskill.dev/ko/technologies/android/interview-questions/android-lifecycle.md): 30개 질문, Junior
- [Android 내비게이션](https://sharpskill.dev/ko/technologies/android/interview-questions/android-navigation.md): 26개 질문, Junior
- [Android 데이터 관리](https://sharpskill.dev/ko/technologies/android/interview-questions/android-data-management.md): 29개 질문, Junior
- [Android 네트워킹](https://sharpskill.dev/ko/technologies/android/interview-questions/android-networking.md): 29개 질문, Junior
- [Android 테스트](https://sharpskill.dev/ko/technologies/android/interview-questions/android-testing.md): 28개 질문, Junior
- [Android Gradle](https://sharpskill.dev/ko/technologies/android/interview-questions/android-gradle.md): 26개 질문, Junior
- [Android를 위한 Kotlin 언어 기초](https://sharpskill.dev/ko/technologies/android/interview-questions/android-kotlin-language-essentials.md): 24개 질문, Junior
- [Room Database](https://sharpskill.dev/ko/technologies/android/interview-questions/android-room-database.md): 25개 질문, Mid-Level
- [백그라운드 작업](https://sharpskill.dev/ko/technologies/android/interview-questions/android-background-work.md): 18개 질문, Mid-Level
- [Jetpack Compose](https://sharpskill.dev/ko/technologies/android/interview-questions/android-compose.md): 28개 질문, Mid-Level
- [권한 및 기기 기능](https://sharpskill.dev/ko/technologies/android/interview-questions/android-permissions-and-device.md): 21개 질문, Mid-Level
- [Android용 Firebase](https://sharpskill.dev/ko/technologies/android/interview-questions/android-firebase.md): 23개 질문, Mid-Level
- [Android MVVM Architecture](https://sharpskill.dev/ko/technologies/android/interview-questions/android-mvvm-architecture.md): 18개 질문, Mid-Level
- [Android 네트워킹 고급](https://sharpskill.dev/ko/technologies/android/interview-questions/android-networking-advanced.md): 13개 질문, Mid-Level
- [Kotlin 컬렉션과 연산자](https://sharpskill.dev/ko/technologies/android/interview-questions/android-kotlin-collections-operators.md): 20개 질문, Mid-Level
- [Kotlin Coroutines와 Flow](https://sharpskill.dev/ko/technologies/android/interview-questions/android-kotlin-coroutines-flow.md): 20개 질문, Mid-Level
- [Android 의존성 주입](https://sharpskill.dev/ko/technologies/android/interview-questions/android-dependency-injection.md): 15개 질문, Mid-Level
- [Android MVI Architecture](https://sharpskill.dev/ko/technologies/android/interview-questions/android-mvi-architecture.md): 17개 질문, Mid-Level
- [Android Clean Architecture](https://sharpskill.dev/ko/technologies/android/interview-questions/android-clean-architecture.md): 21개 질문, Senior
- [Android Compose 고급](https://sharpskill.dev/ko/technologies/android/interview-questions/android-compose-advanced.md): 17개 질문, Senior
- [Android Performance and Monitoring](https://sharpskill.dev/ko/technologies/android/interview-questions/android-performance-monitoring.md): 13개 질문, Senior
- [Android Security and Privacy](https://sharpskill.dev/ko/technologies/android/interview-questions/android-security-privacy.md): 18개 질문, Senior
- [Android CI/CD and Release](https://sharpskill.dev/ko/technologies/android/interview-questions/android-cicd-release.md): 15개 질문, Senior
- [Android UX and Form Factors](https://sharpskill.dev/ko/technologies/android/interview-questions/android-ux-form-factors.md): 18개 질문, Senior

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