| /* |
| * Copyright 2016-2017 JetBrains s.r.o. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package kotlinx.coroutines.experimental.channels |
| |
| import kotlinx.coroutines.experimental.* |
| import org.hamcrest.core.IsEqual |
| import org.hamcrest.core.IsNull |
| import org.junit.Assert.* |
| import org.junit.Test |
| |
| class ArrayBroadcastChannelTest : TestBase() { |
| @Test |
| fun testBasic() = runBlocking<Unit> { |
| expect(1) |
| val broadcast = ArrayBroadcastChannel<Int>(1) |
| assertThat(broadcast.isClosedForSend, IsEqual(false)) |
| val first = broadcast.open() |
| launch(context, CoroutineStart.UNDISPATCHED) { |
| expect(2) |
| assertThat(first.receive(), IsEqual(1)) // suspends |
| assertThat(first.isClosedForReceive, IsEqual(false)) |
| expect(5) |
| assertThat(first.receive(), IsEqual(2)) // suspends |
| assertThat(first.isClosedForReceive, IsEqual(false)) |
| expect(10) |
| assertThat(first.receiveOrNull(), IsNull()) // suspends |
| assertThat(first.isClosedForReceive, IsEqual(true)) |
| expect(14) |
| } |
| expect(3) |
| broadcast.send(1) |
| expect(4) |
| yield() // to the first receiver |
| expect(6) |
| val second = broadcast.open() |
| launch(context, CoroutineStart.UNDISPATCHED) { |
| expect(7) |
| assertThat(second.receive(), IsEqual(2)) // suspends |
| assertThat(second.isClosedForReceive, IsEqual(false)) |
| expect(11) |
| assertThat(second.receiveOrNull(), IsNull()) // suspends |
| assertThat(second.isClosedForReceive, IsEqual(true)) |
| expect(15) |
| } |
| expect(8) |
| broadcast.send(2) |
| expect(9) |
| yield() // to first & second receivers |
| expect(12) |
| broadcast.close() |
| expect(13) |
| assertThat(broadcast.isClosedForSend, IsEqual(true)) |
| yield() // to first & second receivers |
| finish(16) |
| } |
| |
| @Test |
| fun testSendSuspend() = runBlocking { |
| expect(1) |
| val broadcast = ArrayBroadcastChannel<Int>(1) |
| val first = broadcast.open() |
| launch(context) { |
| expect(4) |
| assertThat(first.receive(), IsEqual(1)) |
| expect(5) |
| assertThat(first.receive(), IsEqual(2)) |
| expect(6) |
| } |
| expect(2) |
| broadcast.send(1) // puts to buffer, receiver not running yet |
| expect(3) |
| broadcast.send(2) // suspends |
| finish(7) |
| } |
| |
| @Test |
| fun testConcurrentSendCompletion() = runBlocking { |
| expect(1) |
| val broadcast = ArrayBroadcastChannel<Int>(1) |
| val sub = broadcast.open() |
| // launch 3 concurrent senders (one goes buffer, two other suspend) |
| for (x in 1..3) { |
| launch(context, CoroutineStart.UNDISPATCHED) { |
| expect(x + 1) |
| broadcast.send(x) |
| } |
| } |
| // and close it for send |
| expect(5) |
| broadcast.close() |
| // now must receive all 3 items |
| expect(6) |
| assertThat(sub.isClosedForReceive, IsEqual(false)) |
| for (x in 1..3) |
| assertThat(sub.receiveOrNull(), IsEqual(x)) |
| // and receive close signal |
| assertThat(sub.receiveOrNull(), IsNull()) |
| assertThat(sub.isClosedForReceive, IsEqual(true)) |
| finish(7) |
| } |
| } |