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/*
* 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", "UNREACHABLE_CODE") // KT-21913
package kotlinx.coroutines
import kotlin.test.*
class WithTimeoutTest : TestBase() {
/**
* Tests a case of no timeout and no suspension inside.
*/
@Test
fun testBasicNoSuspend() = runTest {
expect(1)
val result = withTimeout(10_000) {
expect(2)
"OK"
}
assertEquals("OK", result)
finish(3)
}
/**
* Tests a case of no timeout and one suspension inside.
*/
@Test
fun testBasicSuspend() = runTest {
expect(1)
val result = withTimeout(10_000) {
expect(2)
yield()
expect(3)
"OK"
}
assertEquals("OK", result)
finish(4)
}
/**
* Tests proper dispatching of `withTimeout` blocks
*/
@Test
fun testDispatch() = runTest {
expect(1)
launch {
expect(4)
yield() // back to main
expect(7)
}
expect(2)
// test that it does not yield to the above job when started
val result = withTimeout(1000) {
expect(3)
yield() // yield only now
expect(5)
"OK"
}
assertEquals("OK", result)
expect(6)
yield() // back to launch
finish(8)
}
/**
* Tests that a 100% CPU-consuming loop will react on timeout if it has yields.
*/
@Test
fun testYieldBlockingWithTimeout() = runTest(
expected = { it is CancellationException }
) {
withTimeout(100) {
while (true) {
yield()
}
}
}
/**
* Tests that [withTimeout] waits for children coroutines to complete.
*/
@Test
fun testWithTimeoutChildWait() = runTest {
expect(1)
withTimeout(100) {
expect(2)
// launch child with timeout
launch {
expect(4)
}
expect(3)
// now will wait for child before returning
}
finish(5)
}
@Test
fun testBadClass() = runTest {
val bad = BadClass()
val result = withTimeout(100) {
bad
}
assertSame(bad, result)
}
class BadClass {
override fun equals(other: Any?): Boolean = error("Should not be called")
override fun hashCode(): Int = error("Should not be called")
override fun toString(): String = error("Should not be called")
}
@Test
fun testExceptionOnTimeout() = runTest {
expect(1)
try {
withTimeout(100) {
expect(2)
delay(1000)
expectUnreached()
"OK"
}
} catch (e: CancellationException) {
assertEquals("Timed out waiting for 100 ms", e.message)
finish(3)
}
}
@Test
fun testSuppressExceptionWithResult() = runTest(
expected = { it is CancellationException }
) {
expect(1)
withTimeout(100) {
expect(2)
try {
delay(1000)
} catch (e: CancellationException) {
finish(3)
}
"OK"
}
expectUnreached()
}
@Test
fun testSuppressExceptionWithAnotherException() = runTest{
expect(1)
try {
withTimeout(100) {
expect(2)
try {
delay(1000)
} catch (e: CancellationException) {
expect(3)
throw TestException()
}
expectUnreached()
"OK"
}
expectUnreached()
} catch (e: TestException) {
finish(4)
}
}
@Test
fun testNegativeTimeout() = runTest {
expect(1)
try {
withTimeout(-1) {
expectUnreached()
"OK"
}
} catch (e: CancellationException) {
assertEquals("Timed out immediately", e.message)
finish(2)
}
}
@Test
fun testExceptionFromWithinTimeout() = runTest {
expect(1)
try {
expect(2)
withTimeout(1000) {
expect(3)
throw TestException()
}
expectUnreached()
} catch (e: TestException) {
finish(4)
}
}
}
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