common/kotlinx-coroutines-core-common/test/selects/SelectJobTest.kt

/*
 * 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 kotlinx.coroutines.experimental.*
import kotlin.coroutines.experimental.*
import kotlin.test.*

class SelectJobTest : TestBase() {
    @Test
    fun testSelectCompleted() = runTest {
        expect(1)
        launch(coroutineContext) { // makes sure we don't yield to it earlier
            finish(4) // after main exits
        }
        val job = Job()
        job.cancel()
        select<Unit> {
            job.onJoin {
                expect(2)
            }
        }
        expect(3)
        // will wait for the first coroutine
    }

    @Test
    fun testSelectIncomplete() = runTest {
        expect(1)
        val job = Job()
        launch(coroutineContext) { // makes sure we don't yield to it earlier
            expect(3)
            val res = select<String> {
                job.onJoin {
                    expect(6)
                    "OK"
                }
            }
            expect(7)
            assertEquals("OK", res)
        }
        expect(2)
        yield()
        expect(4)
        job.cancel()
        expect(5)
        yield()
        finish(8)
    }

    @Test
    fun testSelectLazy() = runTest {
        expect(1)
        val job = launch(coroutineContext, CoroutineStart.LAZY) {
            expect(2)
        }
        val res = select<String> {
            job.onJoin {
                expect(3)
                "OK"
            }
        }
        finish(4)
        assertEquals("OK", res)
    }
}