| /* |
| * Copyright 2016-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license. |
| */ |
| |
| package kotlinx.coroutines.experimental.selects |
| |
| import kotlin.coroutines.experimental.* |
| import kotlin.coroutines.experimental.intrinsics.* |
| import kotlin.test.* |
| |
| class SelectBuilderImplTest { |
| @Test |
| fun testIdempotentSelectResumeInline() { |
| var resumed = false |
| val delegate = object : Continuation<String> { |
| override val context: CoroutineContext get() = EmptyCoroutineContext |
| override fun resume(value: String) { |
| check(value === "OK") |
| resumed = true |
| } |
| override fun resumeWithException(exception: Throwable) { error("Should not happen") } |
| } |
| 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 resume(value: String) { |
| check(value === "OK") |
| resumed = true |
| } |
| override fun resumeWithException(exception: Throwable) { error("Should not happen") } |
| } |
| 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 resume(value: String) { error("Should not happen") } |
| override fun resumeWithException(exception: Throwable) { |
| check(exception 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 resume(value: String) { error("Should not happen") } |
| override fun resumeWithException(exception: Throwable) { |
| check(exception 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")) |
| } |
| |
| class TestException : Throwable() |
| } |