11d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert/* 21d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * Copyright (C) 2007 The Guava Authors 31d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * 41d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * Licensed under the Apache License, Version 2.0 (the "License"); 51d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * you may not use this file except in compliance with the License. 61d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * You may obtain a copy of the License at 71d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * 81d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * http://www.apache.org/licenses/LICENSE-2.0 91d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * 101d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * Unless required by applicable law or agreed to in writing, software 111d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * distributed under the License is distributed on an "AS IS" BASIS, 121d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 131d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * See the License for the specific language governing permissions and 141d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * limitations under the License. 151d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert */ 161d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 171d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertpackage com.google.common.eventbus; 181d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 191d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertimport com.google.common.collect.Lists; 201d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertimport java.util.List; 211d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertimport java.util.concurrent.Executor; 221d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertimport junit.framework.TestCase; 231d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 241d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert/** 251d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * Test case for {@link AsyncEventBus}. 261d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * 271d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * @author Cliff Biffle 281d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert */ 291d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertpublic class AsyncEventBusTest extends TestCase { 301d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert private static final String EVENT = "Hello"; 311d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 321d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert /** The executor we use to fake asynchronicity. */ 331d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert private FakeExecutor executor; 341d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert private AsyncEventBus bus; 351d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 361d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert @Override protected void setUp() throws Exception { 371d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert super.setUp(); 381d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert executor = new FakeExecutor(); 391d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert bus = new AsyncEventBus(executor); 401d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 411d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 421d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public void testBasicDistribution() { 431d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert StringCatcher catcher = new StringCatcher(); 441d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert bus.register(catcher); 451d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 461d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert // We post the event, but our Executor will not deliver it until instructed. 471d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert bus.post(EVENT); 481d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 491d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert List<String> events = catcher.getEvents(); 501d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertTrue("No events should be delivered synchronously.", 511d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert events.isEmpty()); 521d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 531d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert // Now we find the task in our Executor and explicitly activate it. 541d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert List<Runnable> tasks = executor.getTasks(); 551d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertEquals("One event dispatch task should be queued.", 1, tasks.size()); 561d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 571d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert tasks.get(0).run(); 581d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 591d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertEquals("One event should be delivered.", 1, events.size()); 601d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertEquals("Correct string should be delivered.", EVENT, events.get(0)); 611d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 621d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 631d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert /** 641d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * An {@link Executor} wanna-be that simply records the tasks it's given. 651d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * Arguably the Worst Executor Ever. 661d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * 671d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * @author cbiffle 681d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * 691d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert */ 701d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public static class FakeExecutor implements Executor { 711d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert List<Runnable> tasks = Lists.newArrayList(); 721d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 731d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert @Override 741d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public void execute(Runnable task) { 751d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert tasks.add(task); 761d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 771d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 781d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public List<Runnable> getTasks() { 791d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert return tasks; 801d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 811d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 821d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 831d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert} 84