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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.reactor
import kotlinx.coroutines.*
import kotlinx.coroutines.reactive.*
import org.hamcrest.core.*
import org.junit.*
import org.junit.Assert.*
import reactor.core.publisher.*
import java.time.Duration.*
class MonoTest : TestBase() {
@Before
fun setup() {
ignoreLostThreads("timer-", "parallel-")
}
@Test
fun testBasicSuccess() = runBlocking {
expect(1)
val mono = mono {
expect(4)
"OK"
}
expect(2)
mono.subscribe { value ->
expect(5)
Assert.assertThat(value, IsEqual("OK"))
}
expect(3)
yield() // to started coroutine
finish(6)
}
@Test
fun testBasicFailure() = runBlocking {
expect(1)
val mono = mono(NonCancellable) {
expect(4)
throw RuntimeException("OK")
}
expect(2)
mono.subscribe({
expectUnreached()
}, { error ->
expect(5)
Assert.assertThat(error, IsInstanceOf(RuntimeException::class.java))
Assert.assertThat(error.message, IsEqual("OK"))
})
expect(3)
yield() // to started coroutine
finish(6)
}
@Test
fun testBasicEmpty() = runBlocking {
expect(1)
val mono = mono {
expect(4)
null
}
expect(2)
mono.subscribe({}, { throw it }, {
expect(5)
})
expect(3)
yield() // to started coroutine
finish(6)
}
@Test
fun testBasicUnsubscribe() = runBlocking {
expect(1)
val mono = mono {
expect(4)
yield() // back to main, will get cancelled
expectUnreached()
}
expect(2)
// nothing is called on a disposed mono
val sub = mono.subscribe({
expectUnreached()
}, {
expectUnreached()
})
expect(3)
yield() // to started coroutine
expect(5)
sub.dispose() // will cancel coroutine
yield()
finish(6)
}
@Test
fun testMonoNoWait() {
val mono = GlobalScope.mono {
"OK"
}
checkMonoValue(mono) {
assertEquals("OK", it)
}
}
@Test
fun testMonoAwait() = runBlocking {
assertEquals("OK", Mono.just("O").awaitSingle() + "K")
}
@Test
fun testMonoEmitAndAwait() {
val mono = GlobalScope.mono {
Mono.just("O").awaitSingle() + "K"
}
checkMonoValue(mono) {
assertEquals("OK", it)
}
}
@Test
fun testMonoWithDelay() {
val mono = GlobalScope.mono {
Flux.just("O").delayElements(ofMillis(50)).awaitSingle() + "K"
}
checkMonoValue(mono) {
assertEquals("OK", it)
}
}
@Test
fun testMonoException() {
val mono = GlobalScope.mono {
Flux.just("O", "K").awaitSingle() + "K"
}
checkErroneous(mono) {
assert(it is IllegalArgumentException)
}
}
@Test
fun testAwaitFirst() {
val mono = GlobalScope.mono {
Flux.just("O", "#").awaitFirst() + "K"
}
checkMonoValue(mono) {
assertEquals("OK", it)
}
}
@Test
fun testAwaitLast() {
val mono = GlobalScope.mono {
Flux.just("#", "O").awaitLast() + "K"
}
checkMonoValue(mono) {
assertEquals("OK", it)
}
}
@Test
fun testExceptionFromFlux() {
val mono = GlobalScope.mono {
try {
Flux.error<String>(RuntimeException("O")).awaitFirst()
} catch (e: RuntimeException) {
Flux.just(e.message!!).awaitLast() + "K"
}
}
checkMonoValue(mono) {
assertEquals("OK", it)
}
}
@Test
fun testExceptionFromCoroutine() {
val mono = GlobalScope.mono<String> {
throw IllegalStateException(Flux.just("O").awaitSingle() + "K")
}
checkErroneous(mono) {
assert(it is IllegalStateException)
assertEquals("OK", it.message)
}
}
@Test
fun testCancelsParentOnFailure() = runTest(
expected = { it is RuntimeException && it.message == "OK" }
) {
// has parent, so should cancel it on failure
mono<Unit> {
throw RuntimeException("OK")
}.subscribe(
{ expectUnreached() },
{ assert(it is RuntimeException) }
)
}
}
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