| /* |
| * Copyright 2016, gRPC Authors All rights reserved. |
| * |
| * 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 io.grpc.internal; |
| |
| import static org.junit.Assert.assertSame; |
| import static org.junit.Assert.assertTrue; |
| import static org.mockito.Mockito.doAnswer; |
| import static org.mockito.Mockito.inOrder; |
| |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.atomic.AtomicReference; |
| import org.junit.Before; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.JUnit4; |
| import org.mockito.InOrder; |
| import org.mockito.Mock; |
| import org.mockito.MockitoAnnotations; |
| import org.mockito.invocation.InvocationOnMock; |
| import org.mockito.stubbing.Answer; |
| |
| /** |
| * Unit tests for {@link ChannelExecutor}. |
| */ |
| @RunWith(JUnit4.class) |
| public class ChannelExecutorTest { |
| private final ChannelExecutor executor = new ChannelExecutor(); |
| |
| @Mock |
| private Runnable task1; |
| |
| @Mock |
| private Runnable task2; |
| |
| @Mock |
| private Runnable task3; |
| |
| @Before public void setUp() { |
| MockitoAnnotations.initMocks(this); |
| } |
| |
| @Test |
| public void singleThread() { |
| executor.executeLater(task1); |
| executor.executeLater(task2); |
| InOrder inOrder = inOrder(task1, task2, task3); |
| inOrder.verifyNoMoreInteractions(); |
| executor.drain(); |
| inOrder.verify(task1).run(); |
| inOrder.verify(task2).run(); |
| |
| executor.executeLater(task3); |
| inOrder.verifyNoMoreInteractions(); |
| executor.drain(); |
| inOrder.verify(task3).run(); |
| } |
| |
| @Test |
| public void multiThread() throws Exception { |
| InOrder inOrder = inOrder(task1, task2); |
| |
| final CountDownLatch task1Added = new CountDownLatch(1); |
| final CountDownLatch task1Running = new CountDownLatch(1); |
| final CountDownLatch task1Proceed = new CountDownLatch(1); |
| final CountDownLatch sideThreadDone = new CountDownLatch(1); |
| final AtomicReference<Thread> task1Thread = new AtomicReference<Thread>(); |
| final AtomicReference<Thread> task2Thread = new AtomicReference<Thread>(); |
| |
| doAnswer(new Answer<Void>() { |
| @Override |
| public Void answer(InvocationOnMock invocation) { |
| task1Thread.set(Thread.currentThread()); |
| task1Running.countDown(); |
| try { |
| assertTrue(task1Proceed.await(5, TimeUnit.SECONDS)); |
| } catch (InterruptedException e) { |
| throw new RuntimeException(e); |
| } |
| return null; |
| } |
| }).when(task1).run(); |
| |
| doAnswer(new Answer<Void>() { |
| @Override |
| public Void answer(InvocationOnMock invocation) { |
| task2Thread.set(Thread.currentThread()); |
| return null; |
| } |
| }).when(task2).run(); |
| |
| Thread sideThread = new Thread() { |
| @Override |
| public void run() { |
| executor.executeLater(task1); |
| task1Added.countDown(); |
| executor.drain(); |
| sideThreadDone.countDown(); |
| } |
| }; |
| sideThread.start(); |
| |
| assertTrue(task1Added.await(5, TimeUnit.SECONDS)); |
| executor.executeLater(task2); |
| assertTrue(task1Running.await(5, TimeUnit.SECONDS)); |
| // This will do nothing because task1 is running until task1Proceed is set |
| executor.drain(); |
| |
| inOrder.verify(task1).run(); |
| inOrder.verifyNoMoreInteractions(); |
| |
| task1Proceed.countDown(); |
| // drain() on the side thread has returned, which runs task2 |
| assertTrue(sideThreadDone.await(5, TimeUnit.SECONDS)); |
| inOrder.verify(task2).run(); |
| |
| assertSame(sideThread, task1Thread.get()); |
| assertSame(sideThread, task2Thread.get()); |
| } |
| |
| @Test |
| public void taskThrows() { |
| InOrder inOrder = inOrder(task1, task2, task3); |
| doAnswer(new Answer<Void>() { |
| @Override |
| public Void answer(InvocationOnMock invocation) { |
| throw new RuntimeException("Simulated"); |
| } |
| }).when(task2).run(); |
| executor.executeLater(task1); |
| executor.executeLater(task2); |
| executor.executeLater(task3); |
| executor.drain(); |
| inOrder.verify(task1).run(); |
| inOrder.verify(task2).run(); |
| inOrder.verify(task3).run(); |
| } |
| } |