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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 kotlin.test.*
import java.util.concurrent.ExecutorService
import java.util.concurrent.Executors
import java.util.concurrent.ThreadFactory
import java.util.concurrent.atomic.AtomicInteger
import kotlin.coroutines.CoroutineContext
class WithTimeoutOrNullThreadDispatchTest : TestBase() {
var executor: ExecutorService? = null
@AfterTest
fun tearDown() {
executor?.shutdown()
}
@Test
fun testCancellationDispatchScheduled() {
checkCancellationDispatch {
executor = Executors.newScheduledThreadPool(1, it)
executor!!.asCoroutineDispatcher()
}
}
@Test
fun testCancellationDispatchNonScheduled() {
checkCancellationDispatch {
executor = Executors.newSingleThreadExecutor(it)
executor!!.asCoroutineDispatcher()
}
}
@Test
fun testCancellationDispatchCustomNoDelay() {
// it also checks that there is at most once scheduled request in flight (no spurious concurrency)
var error: String? = null
checkCancellationDispatch {
executor = Executors.newSingleThreadExecutor(it)
val scheduled = AtomicInteger(0)
object : CoroutineDispatcher() {
override fun dispatch(context: CoroutineContext, block: Runnable) {
if (scheduled.incrementAndGet() > 1) error = "Two requests are scheduled concurrently"
executor!!.execute {
scheduled.decrementAndGet()
block.run()
}
}
}
}
error?.let { error(it) }
}
private fun checkCancellationDispatch(factory: (ThreadFactory) -> CoroutineDispatcher) = runBlocking {
expect(1)
var thread: Thread? = null
val dispatcher = factory(ThreadFactory { Thread(it).also { thread = it } })
withContext(dispatcher) {
expect(2)
assertEquals(thread, Thread.currentThread())
val result = withTimeoutOrNull(100) {
try {
expect(3)
delay(1000)
expectUnreached()
} catch (e: CancellationException) {
expect(4)
assertEquals(thread, Thread.currentThread())
throw e // rethrow
}
}
assertEquals(thread, Thread.currentThread())
assertEquals(null, result)
expect(5)
}
finish(6)
}
}
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