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/*
* Copyright 2016-2019 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
*/
package kotlinx.coroutines.exceptions
import kotlinx.coroutines.*
import kotlinx.coroutines.channels.*
import org.junit.Test
import kotlin.test.*
@Suppress("UNREACHABLE_CODE", "UNUSED", "UNUSED_PARAMETER")
class StackTraceRecoveryCustomExceptionsTest : TestBase() {
internal class NonCopyable(val customData: Int) : Throwable() {
// Bait
public constructor(cause: Throwable) : this(42)
}
internal class Copyable(val customData: Int) : Throwable(), CopyableThrowable<Copyable> {
// Bait
public constructor(cause: Throwable) : this(42)
override fun createCopy(): Copyable {
val copy = Copyable(customData)
copy.initCause(this)
return copy
}
}
@Test
fun testStackTraceNotRecovered() = runTest {
try {
withContext(wrapperDispatcher(coroutineContext)) {
throw NonCopyable(239)
}
expectUnreached()
} catch (e: NonCopyable) {
assertEquals(239, e.customData)
assertNull(e.cause)
}
}
@Test
fun testStackTraceRecovered() = runTest {
try {
withContext(wrapperDispatcher(coroutineContext)) {
throw Copyable(239)
}
expectUnreached()
} catch (e: Copyable) {
assertEquals(239, e.customData)
val cause = e.cause
assertTrue(cause is Copyable)
assertEquals(239, cause.customData)
}
}
internal class WithDefault(message: String = "default") : Exception(message)
@Test
fun testStackTraceRecoveredWithCustomMessage() = runTest {
try {
withContext(wrapperDispatcher(coroutineContext)) {
throw WithDefault("custom")
}
expectUnreached()
} catch (e: WithDefault) {
assertEquals("custom", e.message)
val cause = e.cause
assertTrue(cause is WithDefault)
assertEquals("custom", cause.message)
}
}
class WrongMessageException(token: String) : RuntimeException("Token $token")
@Test
fun testWrongMessageException() = runTest {
val result = runCatching {
coroutineScope<Unit> {
throw WrongMessageException("OK")
}
}
val ex = result.exceptionOrNull() ?: error("Expected to fail")
assertTrue(ex is WrongMessageException)
assertEquals("Token OK", ex.message)
}
@Test
fun testWrongMessageExceptionInChannel() = runTest {
val result = produce<Unit>(SupervisorJob() + Dispatchers.Unconfined) {
throw WrongMessageException("OK")
}
val ex = runCatching {
@Suppress("ControlFlowWithEmptyBody")
for (unit in result) {
// Iterator has a special code path
}
}.exceptionOrNull() ?: error("Expected to fail")
assertTrue(ex is WrongMessageException)
assertEquals("Token OK", ex.message)
}
class CopyableWithCustomMessage(
message: String?,
cause: Throwable? = null
) : RuntimeException(message, cause),
CopyableThrowable<CopyableWithCustomMessage> {
override fun createCopy(): CopyableWithCustomMessage {
return CopyableWithCustomMessage("Recovered: [$message]", cause)
}
}
@Test
fun testCustomCopyableMessage() = runTest {
val result = runCatching {
coroutineScope<Unit> {
throw CopyableWithCustomMessage("OK")
}
}
val ex = result.exceptionOrNull() ?: error("Expected to fail")
assertTrue(ex is CopyableWithCustomMessage)
assertEquals("Recovered: [OK]", ex.message)
}
}
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