Android Koin依赖项覆盖在测试中不起作用

我是测试新手，我将Koin用作依赖注入。我的申请很有效。它仍然有一个登录功能。这是我的依赖类

模块.kt

val applicationModule = module (override = true) {
    single { NetworkService.getInstance().getService(APIService::class.java) }
    single { PreferenceManager.getDefaultSharedPreferences(androidContext()) }
}

val activityModule = module {

    scope(named<LoginActivity>()) {
        scoped { (activity: LoginActivity) ->
            Navigation
                .findNavController(activity, R.id.hostFragment)
        }
    }

    scope(named<MainNavigationActivity>()) {
        scoped { (activity: MainNavigationActivity) ->
            Navigation
                .findNavController(activity, R.id.hostFragment)
        }
    }
}

val viewModelModule = module {
    viewModel { LoginViewModel(loginRepository = get()) }
}

val repositoryModule = module (override = true) {
    single { LoginRepository() }
}

class LoginRepositoryTest : KoinTest {

    private val loginRepository: LoginRepository by inject()
    private val server by lazy { MockWebServer() }
    private lateinit var network: APIService

    @get:Rule
    val rule = InstantTaskExecutorRule()

    @Before
    fun setUp() {

        MockitoAnnotations.initMocks(this)

        startKoin {
            printLogger()
            modules(repositoryModule)
        }
    }

    @Test
    fun testLoginWithCorrectCredentials() {

        server.enqueue(
            MockResponse()
                .setResponseCode(200)
                .setBody("{\"msg\":\"success\",\"status\":1,\"session\":{\"userName\":\"Chathuran\",\"loggedin_user_email\":\"valid_email_address@gmail.com\"}}")
        )
        server.start()
        val testingUrl = server.url("account/userAuth/api_login/")

        network = NetworkService.getInstance().getService(APIService::class.java, testingUrl)
        loadKoinModules(module{network})

        val email = "valid_email_address@gmail.com"
        val password = "valid_password"

        loginRepository.generalLogin(email, password)

        loginRepository.getLoginStatus().observeForever {

            it.getContentIfNotHandled()?.also { resource ->
                Assert.assertEquals(email, resource.data?.email)
            }
        }
    }

    @After
    fun tearDown() {
        stopKoin()
        server.shutdown()
    }
}

所以我写了下面的测试类来测试

generallowin（email:String，encryptedPassword:String）

函数中的

LoginRepository

登录还原测试

val applicationModule = module (override = true) {
    single { NetworkService.getInstance().getService(APIService::class.java) }
    single { PreferenceManager.getDefaultSharedPreferences(androidContext()) }
}

val activityModule = module {

    scope(named<LoginActivity>()) {
        scoped { (activity: LoginActivity) ->
            Navigation
                .findNavController(activity, R.id.hostFragment)
        }
    }

    scope(named<MainNavigationActivity>()) {
        scoped { (activity: MainNavigationActivity) ->
            Navigation
                .findNavController(activity, R.id.hostFragment)
        }
    }
}

val viewModelModule = module {
    viewModel { LoginViewModel(loginRepository = get()) }
}

val repositoryModule = module (override = true) {
    single { LoginRepository() }
}

class LoginRepositoryTest : KoinTest {

    private val loginRepository: LoginRepository by inject()
    private val server by lazy { MockWebServer() }
    private lateinit var network: APIService

    @get:Rule
    val rule = InstantTaskExecutorRule()

    @Before
    fun setUp() {

        MockitoAnnotations.initMocks(this)

        startKoin {
            printLogger()
            modules(repositoryModule)
        }
    }

    @Test
    fun testLoginWithCorrectCredentials() {

        server.enqueue(
            MockResponse()
                .setResponseCode(200)
                .setBody("{\"msg\":\"success\",\"status\":1,\"session\":{\"userName\":\"Chathuran\",\"loggedin_user_email\":\"valid_email_address@gmail.com\"}}")
        )
        server.start()
        val testingUrl = server.url("account/userAuth/api_login/")

        network = NetworkService.getInstance().getService(APIService::class.java, testingUrl)
        loadKoinModules(module{network})

        val email = "valid_email_address@gmail.com"
        val password = "valid_password"

        loginRepository.generalLogin(email, password)

        loginRepository.getLoginStatus().observeForever {

            it.getContentIfNotHandled()?.also { resource ->
                Assert.assertEquals(email, resource.data?.email)
            }
        }
    }

    @After
    fun tearDown() {
        stopKoin()
        server.shutdown()
    }
}

因此，在这个类中，我试图用我在测试调用中创建的实例覆盖

APIService

实例。通过这种方式，我可以告诉我的

改型

实例使用

MockWebServer

提供的基本URL。但是我从

Koin

得到以下错误

org.koin.core.error.NoBeanDefFoundException: No definition found for 'com.findmyfare.mobile.app.network.APIService' has been found. Check your module definitions.

    at org.koin.core.scope.Scope.findDefinition(Scope.kt:170)
    at org.koin.core.scope.Scope.resolveInstance(Scope.kt:164)
    at org.koin.core.scope.Scope.get(Scope.kt:128)
    at com.findmyfare.mobile.app.repository.LoginRepository$$special$$inlined$inject$1.invoke(Scope.kt:327)
    at kotlin.SynchronizedLazyImpl.getValue(LazyJVM.kt:74)
    at com.findmyfare.mobile.app.repository.LoginRepository.getNetwork(LoginRepository.kt)
    at com.findmyfare.mobile.app.repository.LoginRepository.generalLogin(LoginRepository.kt:29)
    at com.findmyfare.mobile.app.repository.LoginRepositoryTest.testLoginWithCorrectCredentials(LoginRepositoryTest.kt:56)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
    at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
    at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:55)
    at org.junit.rules.RunRules.evaluate(RunRules.java:20)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
    at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
    at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
    at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)

如果这是错误的，那么覆盖

APIService

实例的正确方法是什么？谢谢

编辑：我的build.gradle依赖项

// Koin
    def koin_version = '2.0.1'
    implementation "org.koin:koin-androidx-scope:$koin_version"
    implementation "org.koin:koin-androidx-viewmodel:$koin_version"
    implementation "org.koin:koin-androidx-ext:$koin_version"
    testImplementation "org.koin:koin-test:$koin_version"

//Testing
    implementation 'androidx.legacy:legacy-support-v4:1.0.0'
    testImplementation 'junit:junit:4.12'
    testImplementation "org.mockito:mockito-core:2.21.0"
    testImplementation 'android.arch.core:core-testing:1.1.1'
    testImplementation 'com.squareup.okhttp3:mockwebserver:4.2.1'
    androidTestImplementation 'androidx.test:runner:1.2.0'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'

---

实际上，您并没有用模块覆盖bean

network = NetworkService.getInstance().getService(APIService::class.java, testingUrl)
loadKoinModules(module{network})

而是将网络bean声明为覆盖

network = NetworkService.getInstance().getService(APIService::class.java, testingUrl)
loadKoinModules(module { single(override=true) { network } })

此外，您不需要对主模块使用

覆盖

在您的实现中，您甚至不需要对上述内容进行

覆盖

。在测试之前，您没有使用Koin启动主模块。这可能会导致另一个问题，因此请确保运行所有需要的模块

startKoin {
    printLogger()
    modules(applicationModule, repositoryModule)
}

---

谢谢你的回答。我做了你要求的所有更改，并消除了那个错误。我能够用测试实例覆盖

网络
实例。未触发
fun generallowin（电子邮件：String，encryptedPassword:String）
内的静态网络调用。如果你知道原因，请留下评论。谢谢。
by inject（）
可能不是最好的测试方法。在
loadKoinModules
之后，尝试在测试中始终获取一个新实例：
loginRepository=get（）
。您可以通过再次省略
applicationModule
来跟踪一些问题。您将看到是否有不正确的设置，或者是否正在重用旧实例。