android.os.Looper中的getMainLooper方法未被模拟,即使在添加RxImmediateSchedulerRule后仍会出现
趋势视图模型测试android.os.Looper中的getMainLooper方法未被模拟,即使在添加RxImmediateSchedulerRule后仍会出现,android,unit-testing,rx-java2,android-looper,Android,Unit Testing,Rx Java2,Android Looper,趋势视图模型测试 @RunWith(JUnit4::class) class TrendingViewModelTest { private lateinit var trendingRepository: TrendingRepository private lateinit var trendingViewModel: TrendingViewModel @get:Rule val schedulers = RxImmediateSchedulerRule(
@RunWith(JUnit4::class)
class TrendingViewModelTest {
private lateinit var trendingRepository: TrendingRepository
private lateinit var trendingViewModel: TrendingViewModel
@get:Rule
val schedulers = RxImmediateSchedulerRule()
@Before
fun setUp() {
trendingRepository = mock(TrendingRepository::class.java)
trendingViewModel = TrendingViewModel(trendingRepository)
}
@Test
fun testWithNetwork() {
trendingViewModel.isConnected = true
trendingViewModel.fetchTrendingRepos()
verify(trendingRepository, times(1)).getTrendingRepos()
}
//...
}
趋势视图模型
fun fetchTrendingRepos() {
if (isConnected) {
loadingProgress.value = true
compositeDisposable.add(
trendingRepository.getTrendingRepos().subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe({ response ->
run {
loadingProgress.value = false
},
{ error ->
loadingProgress.value = false
}
)
)
}
RXimmediateScheduleRule:
class RxImmediateSchedulerRule : TestRule {
override fun apply(base: Statement?, description: Description?): Statement {
return object : Statement() {
@Throws(Throwable::class)
override fun evaluate() {
RxJavaPlugins.setIoSchedulerHandler { Schedulers.trampoline() }
RxJavaPlugins.setComputationSchedulerHandler { Schedulers.trampoline() }
RxJavaPlugins.setNewThreadSchedulerHandler { Schedulers.trampoline() }
RxAndroidPlugins.setInitMainThreadSchedulerHandler { Schedulers.trampoline() }
try {
base?.evaluate()
} finally {
RxJavaPlugins.reset()
RxAndroidPlugins.reset()
}
}
}
}
}
TrendingRepositoryImpl:
class TrendingRepositoryImpl @Inject constructor(
val apiService: GitHubApi,
val trendingDao: AppDao
) : TrendingRepository {
override fun getTrendingRepos(): Single<List<TrendingRepo>> {
return apiService.getTrendingGits()
}
}
class TrendingRepositoryImpl@Inject构造函数(
val apiService:GitHubApi,
val trendingDao:AppDao
):TrendingRepository{
覆盖有趣的getTrendingRepos():单个{
返回apiService.getRendingGits()
}
}
趋势库:
interface TrendingRepository {
fun getTrendingRepos(): Single<List<TrendingRepo>>
}
interface TrendingRepository{
有趣的GetRendingRepos():单身
}
在fetchTrendingRepos()内部,Rxjava调用被启动,它还钩住了“AndroidSchedulers.mainThread()”,这可能是导致它的原因
java.lang.RuntimeException:android.os.Looper中的方法getMainLooper未被模拟。
位于android.os.Looper.getMainLooper(Looper.java)
位于androidx.arch.core.executor.DefaultTaskExecutor.isMainThread(DefaultTaskExecutor.java:77)
位于androidx.arch.core.executor.ArchTaskExecutor.isMainThread(ArchTaskExecutor.java:116)
位于androidx.lifecycle.LiveData.assertMainThread(LiveData.java:461)
位于androidx.lifecycle.LiveData.setValue(LiveData.java:304)
位于androidx.lifecycle.MutableLiveData.setValue(MutableLiveData.java:50)
位于com.manoj.trendgitz.mvvm.ui.TrendingViewModel.fetchTrendingRepos(TrendingViewModel.kt:32)
位于com.manoj.trendgitz.TrendingViewModelTest.testWithNetwork(TrendingViewModelTest.kt:52)
在sun.reflect.NativeMethodAccessorImpl.invoke0(本机方法)处
位于sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
在sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)中
位于java.lang.reflect.Method.invoke(Method.java:498)
位于org.junit.runners.model.FrameworkMethod$1.runReflectVeCall(FrameworkMethod.java:50)
位于org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
位于org.junit.runners.model.FrameworkMethod.invokeeexplosive(FrameworkMethod.java:47)
位于org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
位于org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
位于org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
位于org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
位于org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
位于org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
位于org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
位于org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
访问org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
位于org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
位于org.junit.runners.ParentRunner.run(ParentRunner.java:363)
位于org.junit.runner.JUnitCore.run(JUnitCore.java:137)
位于com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
位于com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
位于com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
位于com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
更新LiveData
值时,还应添加@get:Rule-var-Rule:TestRule=InstantTaskExecutorRule()
不要忘记将以下内容添加到build.gradle文件中:
dependencies {
// ...
testImplementation "androidx.arch.core:core-testing:2.1.0"
}
另外,相应地更改测试代码,以避免出现NullPointerException
:
@Test
fun testWithNetwork() {
trendingViewModel.isConnected = true
Mockito.`when`(trendingRepository.fetchTrendingRepos()).thenReturn(Single.just(listOf<TrendingRepo>()))
trendingViewModel.fetchTrendingRepos()
verify(trendingRepository, times(1)).getTrendingRepos()
}
@测试
有趣的网络测试(){
trendingViewModel.isConnected=true
Mockito.`when`(trendingRepository.fetchTrendingRepos())。然后返回(Single.just(listOf())
trendingViewModel.fetchTrendingRepos()
验证(trendingRepository,times(1)).getTrendingRepos()
}
Mockito.when()
允许您在每次调用mock方法时执行不同的操作。如果您不使用它,您可能会看到可能的NullPointerException
,具体取决于您的测试功能。您能把运行测试时得到的所有日志都放进去吗?添加了@natigbayevit在com.manoj.trendgitz.mvvm.ui.TrendingViewModel.fetchTrendingRepos(TrendingViewModel.kt:34)上导致java.lang.NullPointerException在com.manoj.trendgitz.TrendingViewModelTest.testWithNetwork(TrendingViewModelTest.kt:53)@Natig BabayevWhat在TrendingViewModel?trendingRepository.getTrendingRepos().subscribeOn(Schedulers.io())的第34行,我也调试了它,它可能不是空的,你缺少了Mockito.`when`(trendingRepository.fetchTrendingRepos())。然后返回(…)
。在调用viewModel函数之前添加它。在@Natig Babayev更新了一点问题