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/*
* Copyright 2016-2019 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
*/
package kotlinx.coroutines.rx2
import io.reactivex.exceptions.*
import kotlinx.coroutines.*
import org.junit.*
import org.junit.Test
import java.util.concurrent.*
import kotlin.test.*
class ObservableExceptionHandlingTest : TestBase() {
@Before
fun setup() {
ignoreLostThreads("RxComputationThreadPool-", "RxCachedWorkerPoolEvictor-", "RxSchedulerPurge-")
}
private inline fun <reified T : Throwable> handler(expect: Int) = { t: Throwable ->
assertTrue(t is UndeliverableException && t.cause is T, "$t")
expect(expect)
}
private fun cehUnreached() = CoroutineExceptionHandler { _, _ -> expectUnreached() }
@Test
fun testException() = withExceptionHandler({ expectUnreached() }) {
rxObservable<Int>(Dispatchers.Unconfined + cehUnreached()) {
expect(1)
throw TestException()
}.subscribe({
expectUnreached()
}, {
expect(2) // Reported to onError
})
finish(3)
}
@Test
fun testFatalException() = withExceptionHandler({ expectUnreached() }) {
rxObservable<Int>(Dispatchers.Unconfined + cehUnreached()) {
expect(1)
throw LinkageError()
}.subscribe({
expectUnreached()
}, {
expect(2)
})
finish(3)
}
@Test
fun testExceptionAsynchronous() = withExceptionHandler({ expectUnreached() }) {
rxObservable<Int>(Dispatchers.Unconfined) {
expect(1)
throw TestException()
}.publish()
.refCount()
.subscribe({
expectUnreached()
}, {
expect(2) // Reported to onError
})
finish(3)
}
@Test
fun testFatalExceptionAsynchronous() = withExceptionHandler({ expectUnreached() }) {
rxObservable<Int>(Dispatchers.Unconfined) {
expect(1)
throw LinkageError()
}.publish()
.refCount()
.subscribe({
expectUnreached()
}, {
expect(2) // Fatal exceptions are not treated in a special manner
})
finish(3)
}
@Test
fun testFatalExceptionFromSubscribe() = withExceptionHandler(handler<LinkageError>(3)) {
val latch = CountDownLatch(1)
rxObservable(Dispatchers.Unconfined) {
expect(1)
val result = trySend(Unit)
val exception = result.exceptionOrNull()
assertTrue(exception is UndeliverableException)
assertTrue(exception.cause is LinkageError)
assertTrue(isClosedForSend)
expect(4)
latch.countDown()
}.subscribe({
expect(2)
throw LinkageError()
}, { expectUnreached() }) // Unreached because RxJava bubbles up fatal exceptions, causing `onNext` to throw.
latch.await()
finish(5)
}
@Test
fun testExceptionFromSubscribe() = withExceptionHandler({ expectUnreached() }) {
rxObservable(Dispatchers.Unconfined) {
expect(1)
send(Unit)
}.subscribe({
expect(2)
throw TestException()
}, { expect(3) })
finish(4)
}
@Test
fun testAsynchronousExceptionFromSubscribe() = withExceptionHandler({ expectUnreached() }) {
rxObservable(Dispatchers.Unconfined) {
expect(1)
send(Unit)
}.publish()
.refCount()
.subscribe({
expect(2)
throw RuntimeException()
}, { expect(3) })
finish(4)
}
@Test
fun testAsynchronousFatalExceptionFromSubscribe() = withExceptionHandler(handler<LinkageError>(3)) {
rxObservable(Dispatchers.Unconfined) {
expect(1)
send(Unit)
}.publish()
.refCount()
.subscribe({
expect(2)
throw LinkageError()
}, { expectUnreached() }) // Unreached because RxJava bubbles up fatal exceptions, causing `onNext` to throw.
finish(4)
}
}
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