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/*
* Copyright 2016-2021 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
*/
package kotlinx.coroutines.rx2
import kotlinx.coroutines.*
import kotlinx.coroutines.channels.*
import kotlinx.coroutines.selects.*
import org.junit.Test
import kotlin.onSuccess
import kotlin.test.*
class ObservableSubscriptionSelectTest : TestBase() {
@Test
fun testSelect() = runTest {
// source with n ints
val n = 1000 * stressTestMultiplier
val source = rxObservable { repeat(n) { send(it) } }
var a = 0
var b = 0
// open two subs
val channelA = source.toChannel()
val channelB = source.toChannel()
loop@ while (true) {
val done: Int = select {
channelA.onReceiveCatching { result ->
result.onSuccess { assertEquals(a++, it) }
if (result.isSuccess) 1 else 0
}
channelB.onReceiveCatching { result ->
result.onSuccess { assertEquals(b++, it) }
if (result.isSuccess) 2 else 0
}
}
when (done) {
0 -> break@loop
1 -> {
val r = channelB.receiveCatching().getOrNull()
if (r != null) assertEquals(b++, r)
}
2 -> {
val r = channelA.receiveCatching().getOrNull()
if (r != null) assertEquals(a++, r)
}
}
}
channelA.cancel()
channelB.cancel()
// should receive one of them fully
assertTrue(a == n || b == n)
}
}
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