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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
import org.junit.*
import org.junit.Test
import java.util.concurrent.*
import kotlin.test.*
class JobChildStressTest : TestBase() {
private val N_ITERATIONS = 10_000 * stressTestMultiplier
private val pool = newFixedThreadPoolContext(3, "JobChildStressTest")
@After
fun tearDown() {
pool.close()
}
/**
* Perform concurrent launch of a child job & cancellation of the explicit parent job
*/
@Test
@Suppress("PLATFORM_CLASS_MAPPED_TO_KOTLIN")
fun testChild() = runTest {
val barrier = CyclicBarrier(3)
repeat(N_ITERATIONS) {
var wasLaunched = false
var unhandledException: Throwable? = null
val handler = CoroutineExceptionHandler { _, ex ->
unhandledException = ex
}
val scope = CoroutineScope(pool + handler)
val parent = CompletableDeferred<Unit>()
// concurrent child launcher
val launcher = scope.launch {
barrier.await()
// A: launch child for a parent job
launch(parent) {
wasLaunched = true
throw TestException()
}
}
// concurrent cancel
val canceller = scope.launch {
barrier.await()
// B: cancel parent job of a child
parent.cancel()
}
barrier.await()
joinAll(launcher, canceller, parent)
assertNull(unhandledException)
if (wasLaunched) {
val exception = parent.getCompletionExceptionOrNull()
assertTrue(exception is TestException, "exception=$exception")
}
}
}
}
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