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/*
* Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
* that can be found in the license/LICENSE.txt file.
*/
package test.coroutines
import java.io.Closeable
import java.util.concurrent.ExecutorService
import java.util.concurrent.Executors
import kotlin.coroutines.*
import kotlin.test.assertEquals
class TestDispatcher(
private val name: String
) : AbstractCoroutineContextElement(ContinuationInterceptor), ContinuationInterceptor, Closeable {
private lateinit var thread: Thread
val executor: ExecutorService = Executors.newSingleThreadExecutor { runnable ->
Thread(runnable, name).also { thread = it }
}
fun assertThread() {
assertEquals(thread, Thread.currentThread())
}
override fun <T> interceptContinuation(continuation: Continuation<T>): Continuation<T> =
DispatchedContinuation(continuation)
override fun close() {
executor.shutdown()
}
suspend fun yield() = suspendCoroutine<Unit> { cont ->
executor.execute {
assertThread()
cont.resume(Unit)
}
}
inner class DispatchedContinuation<T>(val delegate: Continuation<T>) : Continuation<T> {
override val context: CoroutineContext = delegate.context
override fun resumeWith(result: Result<T>) {
executor.execute {
delegate.resumeWith(result)
}
}
}
}
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