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[英]How to handle mocked RxJava2 observable throwing exception in unit test
[英]RxJava Unit test Observable interval, Change response by advancing through time
我的存储库中有一个具有可观察间隔的网络轮询功能
class repository @Inject constructor(
private val api: api,
private val schedulerProvider: SchedulerProvider
) {
private fun networkPoll(): Observable<response> {
return Observable.interval(1L, TimeUnit.Seconds, schedulerProvider.io())
.startWith(0L)
.flatMap {
api.getStatus().subscribeOn(schedulerProvider.io()).toObservable()
}
}
private fun pollStates(): Observable<State> {
return networkPoll()
.map {
// map the response to State1, State2, State3
}
}
fun pollForState3(): Observable<State> {
return pollStates()
.subscribeOn(schedulerProvider.io())
.takeUntil {
it is State3
}
}
}
如何对 pollForState3 进行单元测试并通过时间推进来更改响应?
我通过这样做解决了它
private lateinit var repository: Repository
private val schedulerProvider = TestSchedulerProvider()
@Mock
private lateinit var api: Api
@Before
fun setup() {
repository = repository(api, schedulerProvider)
}
@Test
fun test() {
`when`(api.getStatus()).thenReturn(
// return such a way that pollStates function map this to State1
)
val testObserver = repository.pollForState3().test()
schedulerProvider.ioScheduler.advanceTimeBy(1L, TimeUnit.MILLISECONDS)
testObserver.assertValue {
it is State1
}
testObserver.assertNotTerminated()
`when`(api.getStatus()).thenReturn(
// now return such a way that pollStates function map this to State3
)
schedulerProvider.ioScheduler.advanceTimeBy(2L, TimeUnit.SECONDS)
testObserver.assertValue {
it is State3
}
testObserver.assertTerminated()
testObserver.dispose()
}
}
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