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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.coroutines.*
import kotlin.coroutines.intrinsics.*
import kotlin.test.*
class SelectBuilderImplTest : TestBase() {
@Test
fun testIdempotentSelectResumeInline() {
var resumed = false
val delegate = object : Continuation<String> {
override val context: CoroutineContext get() = EmptyCoroutineContext
override fun resumeWith(result: Result<String>) {
check(result.getOrNull() == "OK")
resumed = true
}
}
val c = SelectBuilderImpl(delegate)
// still running builder
check(!c.isSelected)
check(c.trySelect("SELECT"))
check(c.isSelected)
check(!c.trySelect("OTHER"))
check(c.trySelect("SELECT"))
c.completion.resume("OK")
check(!resumed) // still running builder, didn't invoke delegate
check(c.isSelected)
check(!c.trySelect("OTHER"))
check(c.trySelect("SELECT"))
check(c.getResult() === "OK") // then builder returns
}
@Test
fun testIdempotentSelectResumeSuspended() {
var resumed = false
val delegate = object : Continuation<String> {
override val context: CoroutineContext get() = EmptyCoroutineContext
override fun resumeWith(result: Result<String>) {
check(result.getOrNull() == "OK")
resumed = true
}
}
val c = SelectBuilderImpl(delegate)
check(c.getResult() === COROUTINE_SUSPENDED) // suspend first
check(!c.isSelected)
check(c.trySelect("SELECT"))
check(c.isSelected)
check(!c.trySelect("OTHER"))
check(c.trySelect("SELECT"))
check(!resumed)
c.completion.resume("OK")
check(resumed)
check(c.isSelected)
check(!c.trySelect("OTHER"))
check(c.trySelect("SELECT"))
}
@Test
fun testIdempotentSelectResumeWithExceptionInline() {
var resumed = false
val delegate = object : Continuation<String> {
override val context: CoroutineContext get() = EmptyCoroutineContext
override fun resumeWith(result: Result<String>) {
check(result.exceptionOrNull() is TestException)
resumed = true
}
}
val c = SelectBuilderImpl(delegate)
// still running builder
check(!c.isSelected)
check(c.trySelect("SELECT"))
check(c.isSelected)
check(!c.trySelect("OTHER"))
check(c.trySelect("SELECT"))
c.completion.resumeWithException(TestException())
check(!resumed) // still running builder, didn't invoke delegate
check(c.isSelected)
check(!c.trySelect("OTHER"))
check(c.trySelect("SELECT"))
try {
c.getResult() // the builder should throw exception
error("Failed")
} catch (e: Throwable) {
check(e is TestException)
}
}
@Test
fun testIdempotentSelectResumeWithExceptionSuspended() {
var resumed = false
val delegate = object : Continuation<String> {
override val context: CoroutineContext get() = EmptyCoroutineContext
override fun resumeWith(result: Result<String>) {
check(result.exceptionOrNull() is TestException)
resumed = true
}
}
val c = SelectBuilderImpl(delegate)
check(c.getResult() === COROUTINE_SUSPENDED) // suspend first
check(!c.isSelected)
check(c.trySelect("SELECT"))
check(c.isSelected)
check(!c.trySelect("OTHER"))
check(c.trySelect("SELECT"))
check(!resumed)
c.completion.resumeWithException(TestException())
check(resumed)
check(c.isSelected)
check(!c.trySelect("OTHER"))
check(c.trySelect("SELECT"))
}
}
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