| /* |
| * Copyright (C) 2007 The Guava Authors |
| * |
| * 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 com.google.common.util.concurrent; |
| |
| import static com.google.common.util.concurrent.MoreExecutors.directExecutor; |
| |
| import com.google.common.testing.NullPointerTester; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.Executor; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.atomic.AtomicInteger; |
| import junit.framework.TestCase; |
| |
| /** |
| * Unit tests for {@link ExecutionList}. |
| * |
| * @author Nishant Thakkar |
| * @author Sven Mawson |
| */ |
| public class ExecutionListTest extends TestCase { |
| |
| private final ExecutionList list = new ExecutionList(); |
| |
| |
| public void testRunOnPopulatedList() throws Exception { |
| Executor exec = Executors.newCachedThreadPool(); |
| CountDownLatch countDownLatch = new CountDownLatch(3); |
| list.add(new MockRunnable(countDownLatch), exec); |
| list.add(new MockRunnable(countDownLatch), exec); |
| list.add(new MockRunnable(countDownLatch), exec); |
| assertEquals(3L, countDownLatch.getCount()); |
| |
| list.execute(); |
| |
| // Verify that all of the runnables execute in a reasonable amount of time. |
| assertTrue(countDownLatch.await(1L, TimeUnit.SECONDS)); |
| } |
| |
| public void testExecute_idempotent() { |
| final AtomicInteger runCalled = new AtomicInteger(); |
| list.add( |
| new Runnable() { |
| @Override |
| public void run() { |
| runCalled.getAndIncrement(); |
| } |
| }, |
| directExecutor()); |
| list.execute(); |
| assertEquals(1, runCalled.get()); |
| list.execute(); |
| assertEquals(1, runCalled.get()); |
| } |
| |
| |
| public void testExecute_idempotentConcurrently() throws InterruptedException { |
| final CountDownLatch okayToRun = new CountDownLatch(1); |
| final AtomicInteger runCalled = new AtomicInteger(); |
| list.add( |
| new Runnable() { |
| @Override |
| public void run() { |
| try { |
| okayToRun.await(); |
| } catch (InterruptedException e) { |
| Thread.currentThread().interrupt(); |
| throw new RuntimeException(e); |
| } |
| runCalled.getAndIncrement(); |
| } |
| }, |
| directExecutor()); |
| Runnable execute = |
| new Runnable() { |
| @Override |
| public void run() { |
| list.execute(); |
| } |
| }; |
| Thread thread1 = new Thread(execute); |
| Thread thread2 = new Thread(execute); |
| thread1.start(); |
| thread2.start(); |
| assertEquals(0, runCalled.get()); |
| okayToRun.countDown(); |
| thread1.join(); |
| thread2.join(); |
| assertEquals(1, runCalled.get()); |
| } |
| |
| |
| public void testAddAfterRun() throws Exception { |
| // Run the previous test |
| testRunOnPopulatedList(); |
| |
| // If it passed, then verify an Add will be executed without calling run |
| CountDownLatch countDownLatch = new CountDownLatch(1); |
| list.add(new MockRunnable(countDownLatch), Executors.newCachedThreadPool()); |
| assertTrue(countDownLatch.await(1L, TimeUnit.SECONDS)); |
| } |
| |
| public void testOrdering() throws Exception { |
| final AtomicInteger integer = new AtomicInteger(); |
| for (int i = 0; i < 10; i++) { |
| final int expectedCount = i; |
| list.add( |
| new Runnable() { |
| @Override |
| public void run() { |
| integer.compareAndSet(expectedCount, expectedCount + 1); |
| } |
| }, |
| MoreExecutors.directExecutor()); |
| } |
| list.execute(); |
| assertEquals(10, integer.get()); |
| } |
| |
| private class MockRunnable implements Runnable { |
| CountDownLatch countDownLatch; |
| |
| MockRunnable(CountDownLatch countDownLatch) { |
| this.countDownLatch = countDownLatch; |
| } |
| |
| @Override |
| public void run() { |
| countDownLatch.countDown(); |
| } |
| } |
| |
| public void testExceptionsCaught() { |
| list.add(THROWING_RUNNABLE, directExecutor()); |
| list.execute(); |
| list.add(THROWING_RUNNABLE, directExecutor()); |
| } |
| |
| public void testNulls() { |
| new NullPointerTester().testAllPublicInstanceMethods(new ExecutionList()); |
| } |
| |
| private static final Runnable THROWING_RUNNABLE = |
| new Runnable() { |
| @Override |
| public void run() { |
| throw new RuntimeException(); |
| } |
| }; |
| } |