问如何解决使用RxJava和Mockito创建android单元测试不起作用？

EN

以下是我的代码：

class LoginActivityPresenter(private var authUseCase: AuthStructure, private var view: LoginActivityView, private var database: SupervisorDatabaseInterface) {

        fun tryLogin(identifier: String, password: String) {
            val disposable = database.getQrCode() //this retuns Single<QRCode>
                    .doOnSubscribe { view.showProgressDialog() }
                    .doAfterTerminate { view.hideProgressDialog() }
                    .flatMap { it -> authUseCase.authenticate(identifier, password, it.qrcode) }//this retuns Single<UserToken>
                    .subscribe(
                            {
                                database.insertUserToken(it)
                                view.loginSucess()
                            },
                            {
                                when (it) {
                                    is EmptyResultSetException -> {
                                        view.loginErrorNoQrCode()
                                    }
                                    else -> {
                                        view.loginError()
                                        it.printStackTrace()
                                    }
                                }
                            }
                    )
        }
    }

class LoginActivityPresenterTest {
    private val immediateScheduler = object : Scheduler() {
        override fun createWorker(): Worker {
            return ExecutorScheduler.ExecutorWorker(Executor { it.run() })
        }
    }

    private fun <T> any(): T {
        Mockito.any<T>()
        return uninitialized()
    }

    private fun <T> uninitialized(): T = null as T

    @Mock
    private lateinit var mLoginActivityView: LoginActivityView

    @Mock
    private lateinit var mAuthStructure: AuthStructure

    @Mock
    private lateinit var mSupervisorDatabaseInterface: SupervisorDatabaseInterface

    @InjectMocks
    private lateinit var mLoginActivityPresenter: LoginActivityPresenter

    @Before
    fun setup() {
        MockitoAnnotations.initMocks(this)

        RxJavaPlugins.setInitIoSchedulerHandler { immediateScheduler }
        RxAndroidPlugins.setInitMainThreadSchedulerHandler { immediateScheduler }
    }

    @After
    fun tearDown() {
        RxJavaPlugins.reset()
        RxAndroidPlugins.reset()
    }

    @Test
    fun `should happen when you successfully log in`() {
        val userToken = UserToken()
        val qrCode = QRCode("qr")
        val identifier = "test"
        val password = "password"

`when`(mSupervisorDatabaseInterface.getQrCode()).thenReturn(Single.just(qrCode))

        mLoginActivityPresenter.tryLogin(identifier, password)

        verify(mLoginActivityView, times(1)).showProgressDialog()

        verify(mLoginActivityView, times(1)).hideProgressDialog()

        verify(mLoginActivityView, times(1)).loginSucess()

        verify(mLoginActivityView, never()).loginError()
    }
}

测试结果：

java.lang.NullPointerException: The single returned by the mapper is null at io.reactivex.internal.functions.ObjectHelper.requireNonNull(ObjectHelper.java:39) at io.reactivex.internal.operators.single.SingleFlatMap$SingleFlatMapCallback.onSuccess(SingleFlatMap.java:76) at io.reactivex.internal.operators.single.SingleDoAfterTerminate$DoAfterTerminateObserver.onSuccess(SingleDoAfterTerminate.java:70) at io.reactivex.internal.operators.single.SingleDoOnSubscribe$DoOnSubscribeSingleObserver.onSuccess(SingleDoOnSubscribe.java:77) at io.reactivex.internal.operators.single.SingleJust.subscribeActual(SingleJust.java:30) at io.reactivex.Single.subscribe(Single.java:3096) at io.reactivex.internal.operators.single.SingleDoOnSubscribe.subscribeActual(SingleDoOnSubscribe.java:41) at io.reactivex.Single.subscribe(Single.java:3096) at io.reactivex.internal.operators.single.SingleDoAfterTerminate.subscribeActual(SingleDoAfterTerminate.java:43) at io.reactivex.Single.subscribe(Single.java:3096) at io.reactivex.internal.operators.single.SingleFlatMap.subscribeActual(SingleFlatMap.java:36) at io.reactivex.Single.subscribe(Single.java:3096) at io.reactivex.Single.subscribe(Single.java:3082) at id.teste.supervisor.presenters.login.LoginActivityPresenter.tryLogin(LoginActivityPresenter.kt:14) at id.teste.supervisor.presenters.login.LoginActivityPresenterTest.should happen when you successfully log in(LoginActivityPresenterTest.kt:72) 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.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) 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 com.intellij.rt.execution.application.AppMainV2.main(AppMainV2.java:131)

Wanted but not invoked: mLoginActivityView.loginSucess(); -> at id.teste.supervisor.presenters.login.LoginActivityPresenterTest.should happen when you successfully log in(LoginActivityPresenterTest.kt:78)

However, there were exactly 3 interactions with this mock: mLoginActivityView.showProgressDialog(); -> at id.teste.supervisor.presenters.login.LoginActivityPresenter$tryLogin$disposable$1.accept(LoginActivityPresenter.kt:11)

mLoginActivityView.loginError(); -> at id.teste.supervisor.presenters.login.LoginActivityPresenter$tryLogin$disposable$5.accept(LoginActivityPresenter.kt:25)

mLoginActivityView.hideProgressDialog(); -> at id.teste.supervisor.presenters.login.LoginActivityPresenter$tryLogin$disposable$2.run(LoginActivityPresenter.kt:12)

Wanted but not invoked: mLoginActivityView.loginSucess(); -> at id.teste.supervisor.presenters.login.LoginActivityPresenterTest.should happen when you successfully log in(LoginActivityPresenterTest.kt:78)

However, there were exactly 3 interactions with this mock: mLoginActivityView.showProgressDialog(); -> at id.teste.supervisor.presenters.login.LoginActivityPresenter$tryLogin$disposable$1.accept(LoginActivityPresenter.kt:11)

mLoginActivityView.loginError(); -> at id.teste.supervisor.presenters.login.LoginActivityPresenter$tryLogin$disposable$5.accept(LoginActivityPresenter.kt:25)

mLoginActivityView.hideProgressDialog(); -> at id.teste.supervisor.presenters.login.LoginActivityPresenter$tryLogin$disposable$2.run(LoginActivityPresenter.kt:12)

at id.teste.supervisor.presenters.login.LoginActivityPresenterTest.should happen when you successfully log in(LoginActivityPresenterTest.kt:78) 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.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) 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 com.intellij.rt.execution.application.AppMainV2.main(AppMainV2.java:131)

Process finished with exit code 255