| /* |
| * Copyright 2016-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license. |
| */ |
| |
| @file:Suppress("NAMED_ARGUMENTS_NOT_ALLOWED") // KT-21913 |
| |
| package kotlinx.coroutines.experimental |
| |
| import kotlin.test.* |
| |
| class AsyncTest : TestBase() { |
| |
| @Test |
| fun testSimple() = runTest { |
| expect(1) |
| val d = async { |
| expect(3) |
| 42 |
| } |
| expect(2) |
| assertTrue(d.isActive) |
| assertEquals(d.await(), 42) |
| assertTrue(!d.isActive) |
| expect(4) |
| assertEquals(d.await(), 42) // second await -- same result |
| finish(5) |
| } |
| |
| @Test |
| fun testUndispatched() = runTest { |
| expect(1) |
| val d = async(start = CoroutineStart.UNDISPATCHED) { |
| expect(2) |
| 42 |
| } |
| expect(3) |
| assertTrue(!d.isActive) |
| assertEquals(d.await(), 42) |
| finish(4) |
| } |
| |
| @Test |
| fun testSimpleException() = runTest(expected = { it is TestException }) { |
| expect(1) |
| val d = async { |
| finish(3) |
| throw TestException() |
| } |
| expect(2) |
| d.await() // will throw TestException |
| } |
| |
| @Test |
| fun testCancellationWithCause() = runTest(expected = { it is AssertionError }) { |
| expect(1) |
| val d = async(start = CoroutineStart.ATOMIC) { |
| finish(3) |
| yield() |
| } |
| |
| expect(2) |
| d.cancel(AssertionError()) |
| d.await() |
| } |
| |
| @Test |
| fun testLostException() = runTest { |
| expect(1) |
| val deferred = async(Job()) { |
| expect(2) |
| throw Exception() |
| } |
| |
| // Exception is not consumed -> nothing is reported |
| deferred.join() |
| finish(3) |
| } |
| |
| @Test |
| fun testParallelDecompositionCaughtException() = runTest { |
| val deferred = async(Job()) { |
| val decomposed = async { |
| throw AssertionError() |
| 1 |
| } |
| |
| try { |
| decomposed.await() |
| } catch (e: AssertionError) { |
| 42 |
| } |
| } |
| |
| assertEquals(42, deferred.await()) |
| } |
| |
| |
| @Test |
| fun testParallelDecompositionCaughtExceptionWithInheritedParent() = runTest { |
| val deferred = async { |
| val decomposed = async { |
| throw AssertionError() |
| 1 |
| } |
| |
| try { |
| decomposed.await() |
| } catch (e: AssertionError) { |
| 42 |
| } |
| } |
| |
| assertEquals(42, deferred.await()) |
| } |
| |
| @Test |
| fun testParallelDecompositionUncaughtExceptionWithInheritedParent() = runTest(expected = { it is AssertionError }) { |
| val deferred = async { |
| val decomposed = async { |
| throw AssertionError() |
| 1 |
| } |
| |
| decomposed.await() |
| } |
| |
| deferred.await() |
| expectUnreached() |
| } |
| |
| @Test |
| fun testParallelDecompositionUncaughtException() = runTest(expected = { it is AssertionError }) { |
| val deferred = async(Job()) { |
| val decomposed = async { |
| throw AssertionError() |
| 1 |
| } |
| |
| decomposed.await() |
| } |
| |
| deferred.await() |
| expectUnreached() |
| } |
| |
| @Test |
| fun testCancellationTransparency() = runTest { |
| val deferred = async(kotlin.coroutines.experimental.coroutineContext, CoroutineStart.ATOMIC) { |
| expect(2) |
| throw TestException() |
| } |
| |
| expect(1) |
| deferred.cancel(UnsupportedOperationException()) |
| |
| try { |
| deferred.await() |
| } catch (e: UnsupportedOperationException) { |
| finish(3) |
| } |
| } |
| |
| @Test |
| fun testDeferAndYieldException() = runTest(expected = { it is TestException }) { |
| expect(1) |
| val d = async { |
| expect(3) |
| yield() // no effect, parent waiting |
| finish(4) |
| throw TestException() |
| } |
| expect(2) |
| d.await() // will throw IOException |
| } |
| |
| @Test |
| fun testDeferWithTwoWaiters() = runTest { |
| expect(1) |
| val d = async { |
| expect(5) |
| yield() |
| expect(9) |
| 42 |
| } |
| expect(2) |
| launch { |
| expect(6) |
| assertEquals(d.await(), 42) |
| expect(11) |
| } |
| expect(3) |
| launch { |
| expect(7) |
| assertEquals(d.await(), 42) |
| expect(12) |
| } |
| expect(4) |
| yield() // this actually yields control to async, which produces results and resumes both waiters (in order) |
| expect(8) |
| yield() // yield again to "d", which completes |
| expect(10) |
| yield() // yield to both waiters |
| finish(13) |
| } |
| |
| class BadClass { |
| override fun equals(other: Any?): Boolean = error("equals") |
| override fun hashCode(): Int = error("hashCode") |
| override fun toString(): String = error("toString") |
| } |
| |
| @Test |
| fun testDeferBadClass() = runTest { |
| val bad = BadClass() |
| val d = async { |
| expect(1) |
| bad |
| } |
| assertSame(d.await(), bad) |
| finish(2) |
| } |
| |
| @Test |
| fun testOverriddenParent() = runTest { |
| val parent = Job() |
| val deferred = async(parent, CoroutineStart.ATOMIC) { |
| expect(2) |
| delay(Long.MAX_VALUE) |
| } |
| |
| parent.cancel() |
| try { |
| expect(1) |
| deferred.await() |
| } catch (e: JobCancellationException) { |
| finish(3) |
| } |
| } |
| |
| private class TestException : Exception() |
| } |