android - Kotlin、Mockito 和 Android 测试仪器。 Lateinit 属性尚未初始化

Question

我正在尝试在测试仪器中模拟 UseCase 依赖项。

我正在创建一个 @Rule 来处理这个问题:

LocationsUseCaseRule.kt

class LocationsUseCaseRule : ExternalResource() {

    @Mock
    lateinit var locationsUseCase : LocationsUseCase

    @Throws(Throwable::class)
    override fun before() {
        super.before()
        LocationsUseCase.setInstance(locationsUseCase)
    }
}

但是当我点击 before() 时，用例没有加载。

我在单元测试中有相同的实现并且它有效。

这些是我的依赖项:

// Mockito
def mockitoVersion = "2.6.3"
testCompile 'org.mockito:mockito-core:' + mockitoVersion
androidTestCompile 'org.mockito:mockito-core:' + mockitoVersion
androidTestCompile "org.mockito:mockito-android:" + mockitoVersion

testCompile "com.nhaarman:mockito-kotlin-kt1.1:1.5.0"

这就是我在 LocationsUseCase 中设置我的实例的方式:

object Singleton {
    var instance: LocationsUseCase? = null
}

companion object {

    fun setInstance(locationsUseCase: LocationsUseCase?) {
        Singleton.instance = locationsUseCase
    }

    fun getInstance(): LocationsUseCase {
        if (Singleton.instance == null) {
            Singleton.instance = LocationsUseCase(
                    LocationsRepository.instance
            )
        }

        return Singleton.instance!!
    }


}

Answer 1

我认为这种方式更简单并且可以实现你想要的:

object Singleton {
    val instance = LocationsUseCase(LocationsRepository.instance)
}