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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.selects
import kotlinx.coroutines.*
import kotlin.test.*
class SelectBiasTest : TestBase() {
val n = 10_000
@Test
fun testBiased() = runTest {
val d0 = async { 0 }
val d1 = async { 1 }
val counter = IntArray(2)
repeat(n) {
val selected = select<Int> {
d0.onAwait { 0 }
d1.onAwait { 1 }
}
counter[selected]++
}
assertEquals(n, counter[0])
assertEquals(0, counter[1])
}
@Test
fun testUnbiased() = runTest {
val d0 = async { 0 }
val d1 = async { 1 }
val counter = IntArray(2)
repeat(n) {
val selected = selectUnbiased<Int> {
d0.onAwait { 0 }
d1.onAwait { 1 }
}
counter[selected]++
}
assertTrue(counter[0] >= n / 4)
assertTrue(counter[1] >= n / 4)
}
}
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