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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.future
import kotlinx.coroutines.*
import org.junit.*
import org.junit.Assert.*
import java.io.*
import java.util.concurrent.*
class FutureExceptionsTest : TestBase() {
@Test
fun testAwait() {
testException(IOException(), { it is IOException })
}
@Test
fun testAwaitChained() {
testException(IOException(), { it is IOException }, { f -> f.thenApply { it + 1 } })
}
@Test
fun testAwaitDeepChain() {
testException(IOException(), { it is IOException },
{ f -> f
.thenApply { it + 1 }
.thenApply { it + 2 } })
}
@Test
fun testAwaitCompletionException() {
testException(CompletionException("test", IOException()), { it is IOException })
}
@Test
fun testAwaitChainedCompletionException() {
testException(CompletionException("test", IOException()), { it is IOException }, { f -> f.thenApply { it + 1 } })
}
@Test
fun testAwaitTestException() {
testException(TestException(), { it is TestException })
}
@Test
fun testAwaitChainedTestException() {
testException(TestException(), { it is TestException }, { f -> f.thenApply { it + 1 } })
}
private fun testException(
exception: Throwable,
expected: ((Throwable) -> Boolean),
transformer: (CompletableFuture<Int>) -> CompletableFuture<Int> = { it }
) {
// Fast path
runTest {
val future = CompletableFuture<Int>()
val chained = transformer(future)
future.completeExceptionally(exception)
try {
chained.await()
} catch (e: Throwable) {
assertTrue(expected(e))
}
}
// Slow path
runTest {
val future = CompletableFuture<Int>()
val chained = transformer(future)
launch {
future.completeExceptionally(exception)
}
try {
chained.await()
} catch (e: Throwable) {
assertTrue(expected(e))
}
}
}
}
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