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/*
* Copyright 2016-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
*/
package kotlinx.coroutines.reactive
import kotlinx.coroutines.*
import org.junit.*
import org.junit.Test
import org.reactivestreams.*
import java.util.concurrent.*
import kotlin.test.*
public class PublishParentCancelStressTest : TestBase() {
private val dispatcher = newFixedThreadPoolContext(3, "PublishParentCancelStressTest")
private val N_TIMES = 5000 * stressTestMultiplier
@After
fun tearDown() {
dispatcher.close()
}
@Test
fun testStress() = runTest {
var unhandled: Throwable? = null
val handler = CoroutineExceptionHandler { _, ex -> unhandled = ex }
repeat(N_TIMES) {
val barrier = CyclicBarrier(4)
// launch parent job for publisher
val parent = GlobalScope.async<Unit>(dispatcher + handler) {
val publisher = publish<Unit> {
// BARRIER #1 - child publisher crashes
barrier.await()
throw TestException()
}
var sub: Subscription? = null
publisher.subscribe(object : Subscriber<Unit> {
override fun onComplete() { error("Cannot be reached") }
override fun onSubscribe(s: Subscription?) { sub = s }
override fun onNext(t: Unit?) { error("Cannot be reached" ) }
override fun onError(t: Throwable?) {
assertTrue(t is TestException)
}
})
launch {
// BARRIER #3 -- cancel subscription
barrier.await()
sub!!.cancel()
}
// BARRIER #2 -- parent completes
barrier.await()
Unit
}
// BARRIE #4 - go 1-3 together
barrier.await()
// Make sure exception is not lost, but incorporated into parent
val result = kotlin.runCatching { parent.await() }
assertTrue(result.exceptionOrNull() is TestException)
// Make sure unhandled exception handler was not invoked
assertNull(unhandled)
}
}
private class TestException : Exception()
}
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