Android PublishSubject和TestScheduler出现问题,项目编号为';t发射
我一直面临主题和测试调度程序的问题。如果我使用Trampoline调度程序,我的测试就会通过,但是由于某种原因,如果我使用TestScheduler,测试就会失败 这是我的样本测试和相关课程Android PublishSubject和TestScheduler出现问题,项目编号为';t发射,android,unit-testing,testing,rx-java,rx-android,Android,Unit Testing,Testing,Rx Java,Rx Android,我一直面临主题和测试调度程序的问题。如果我使用Trampoline调度程序,我的测试就会通过,但是由于某种原因,如果我使用TestScheduler,测试就会失败 这是我的样本测试和相关课程 @RunWith(MockitoJUnitRunner::class) class DemoViewModelTest { //Error Mocks private val actionsStream: PublishSubject<DemoContract.ViewEvent
@RunWith(MockitoJUnitRunner::class)
class DemoViewModelTest {
//Error Mocks
private val actionsStream: PublishSubject<DemoContract.ViewEvent> = PublishSubject.create()
private lateinit var viewModel: DemoViewModel
private val handler = mock(DemoContract.Handler::class.java)
@Before
fun setup() {
viewModel = DemoViewModel(schedulersProvider, handler)
viewModel.viewEventsStream = actionsStream
}
@Test
fun testUpdateCounter() {
actionsStream.onNext(DemoContract.ViewEvent.UpdateClick)
testScheduler.triggerActions()
verify(handler).onUpdate()
}
protected var testScheduler = TestScheduler()
protected var schedulersProvider: SchedulersProvider = object : SchedulersProvider() {
override fun mainThread(): Scheduler {
return testScheduler
}
override fun io(): Scheduler {
return testScheduler
}
override fun computation(): Scheduler {
return testScheduler
}
override fun newThread(): Scheduler {
return testScheduler
}
override fun trampoline(): Scheduler {
return testScheduler
}
override fun single(): Scheduler {
return testScheduler
}
}
}
关于这件事,如果我替换
viewModel.viewEventsStream = actionsStream
与
这个测试通过了
有人能解释一下吗,提前谢谢。这是最低可运行值非常感谢@akarnokd为我指明了正确的方向。事实证明,这是正在添加的
PublishSubject
的订户(subscribeActual
调用)和我在测试中触发的onNext调用之间的竞争条件onNext
调用在前者发生之前返回
解决方案是在订阅后立即显式调用两次triggerations
,在发布后显式调用一次
改变这个
@Before
fun setup() {
viewModel = DemoViewModel(schedulersProvider, handler)
viewModel.viewEventsStream = actionsStream
}
到
如果在
subscribeOn()
运算符之前插入日志语句,会发生什么情况?尝试.doOnNext(v->logger.debug(v.toString())
-它没有被调用,如果您愿意,这里有一个简单的可复制的git项目。在调用onNext
之前,检查actionstream.hasObservators
是否为true。是否调用过subscribeToViewEvents
?actionstream.hasObservators
是否为false
viewModel.viewEventsStream = actionsStream
viewModel.viewEventsStream = Observable.just(DemoContract.ViewEvent.Update)
@Before
fun setup() {
viewModel = DemoViewModel(schedulersProvider, handler)
viewModel.viewEventsStream = actionsStream
}
@Before
fun setup() {
viewModel = DemoViewModel(schedulersProvider, handler)
viewModel.viewEventsStream = actionsStream
testScheduler.triggerActions()
}