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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.reactive
import kotlinx.coroutines.*
import org.hamcrest.MatcherAssert.*
import org.hamcrest.core.*
import org.junit.*
import org.junit.runner.*
import org.junit.runners.*
import org.reactivestreams.*
import kotlin.coroutines.*
@RunWith(Parameterized::class)
class IntegrationTest(
private val ctx: Ctx,
private val delay: Boolean
) : TestBase() {
enum class Ctx {
MAIN { override fun invoke(context: CoroutineContext): CoroutineContext = context },
DEFAULT { override fun invoke(context: CoroutineContext): CoroutineContext = Dispatchers.Default },
UNCONFINED { override fun invoke(context: CoroutineContext): CoroutineContext = Dispatchers.Unconfined };
abstract operator fun invoke(context: CoroutineContext): CoroutineContext
}
companion object {
@Parameterized.Parameters(name = "ctx={0}, delay={1}")
@JvmStatic
fun params(): Collection<Array<Any>> = Ctx.values().flatMap { ctx ->
listOf(false, true).map { delay ->
arrayOf(ctx, delay)
}
}
}
@Test
fun testEmpty(): Unit = runBlocking {
val pub = CoroutineScope(ctx(coroutineContext)).publish<String> {
if (delay) delay(1)
// does not send anything
}
assertNSE { pub.awaitFirst() }
assertThat(pub.awaitFirstOrDefault("OK"), IsEqual("OK"))
assertThat(pub.awaitFirstOrNull(), IsNull())
assertThat(pub.awaitFirstOrElse { "ELSE" }, IsEqual("ELSE"))
assertNSE { pub.awaitLast() }
assertNSE { pub.awaitSingle() }
var cnt = 0
pub.consumeEach { cnt++ }
assertThat(cnt, IsEqual(0))
}
@Test
fun testSingle() = runBlocking {
val pub = publish(ctx(coroutineContext)) {
if (delay) delay(1)
send("OK")
}
assertThat(pub.awaitFirst(), IsEqual("OK"))
assertThat(pub.awaitFirstOrDefault("!"), IsEqual("OK"))
assertThat(pub.awaitFirstOrNull(), IsEqual("OK"))
assertThat(pub.awaitFirstOrElse { "ELSE" }, IsEqual("OK"))
assertThat(pub.awaitLast(), IsEqual("OK"))
assertThat(pub.awaitSingle(), IsEqual("OK"))
var cnt = 0
pub.consumeEach {
assertThat(it, IsEqual("OK"))
cnt++
}
assertThat(cnt, IsEqual(1))
}
@Test
fun testNumbers() = runBlocking<Unit> {
val n = 100 * stressTestMultiplier
val pub = CoroutineScope(ctx(coroutineContext)).publish {
for (i in 1..n) {
send(i)
if (delay) delay(1)
}
}
assertThat(pub.awaitFirst(), IsEqual(1))
assertThat(pub.awaitFirstOrDefault(0), IsEqual(1))
assertThat(pub.awaitLast(), IsEqual(n))
assertThat(pub.awaitFirstOrNull(), IsEqual(1))
assertThat(pub.awaitFirstOrElse { 0 }, IsEqual(1))
assertIAE { pub.awaitSingle() }
checkNumbers(n, pub)
val channel = pub.openSubscription()
checkNumbers(n, channel.asPublisher(ctx(coroutineContext)))
channel.cancel()
}
@Test
fun testCancelWithoutValue() = runTest {
val job = launch(Job(), start = CoroutineStart.UNDISPATCHED) {
publish<String> {
yield()
expectUnreached()
}.awaitFirst()
}
job.cancel()
job.join()
}
@Test
fun testEmptySingle() = runTest(unhandled = listOf({e -> e is NoSuchElementException})) {
expect(1)
val job = launch(Job(), start = CoroutineStart.UNDISPATCHED) {
publish<String> {
yield()
expect(2)
// Nothing to emit
}.awaitFirst()
}
job.join()
finish(3)
}
private suspend fun checkNumbers(n: Int, pub: Publisher<Int>) {
var last = 0
pub.consumeEach {
assertThat(it, IsEqual(++last))
}
assertThat(last, IsEqual(n))
}
private inline fun assertIAE(block: () -> Unit) {
try {
block()
expectUnreached()
} catch (e: Throwable) {
assertThat(e, IsInstanceOf(IllegalArgumentException::class.java))
}
}
private inline fun assertNSE(block: () -> Unit) {
try {
block()
expectUnreached()
} catch (e: Throwable) {
assertThat(e, IsInstanceOf(NoSuchElementException::class.java))
}
}
}
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