| /* |
| * 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.eventbus; |
| |
| import com.google.common.collect.Lists; |
| |
| import junit.framework.TestCase; |
| |
| import java.util.List; |
| import java.util.concurrent.Executor; |
| |
| /** |
| * Test case for {@link AsyncEventBus}. |
| * |
| * @author Cliff Biffle |
| */ |
| public class AsyncEventBusTest extends TestCase { |
| private static final String EVENT = "Hello"; |
| |
| /** The executor we use to fake asynchronicity. */ |
| private FakeExecutor executor; |
| private AsyncEventBus bus; |
| |
| @Override protected void setUp() throws Exception { |
| super.setUp(); |
| executor = new FakeExecutor(); |
| bus = new AsyncEventBus(executor); |
| } |
| |
| public void testBasicDistribution() { |
| StringCatcher catcher = new StringCatcher(); |
| bus.register(catcher); |
| |
| // We post the event, but our Executor will not deliver it until instructed. |
| bus.post(EVENT); |
| |
| List<String> events = catcher.getEvents(); |
| assertTrue("No events should be delivered synchronously.", |
| events.isEmpty()); |
| |
| // Now we find the task in our Executor and explicitly activate it. |
| List<Runnable> tasks = executor.getTasks(); |
| assertEquals("One event dispatch task should be queued.", 1, tasks.size()); |
| |
| tasks.get(0).run(); |
| |
| assertEquals("One event should be delivered.", 1, events.size()); |
| assertEquals("Correct string should be delivered.", EVENT, events.get(0)); |
| } |
| |
| /** |
| * An {@link Executor} wanna-be that simply records the tasks it's given. |
| * Arguably the Worst Executor Ever. |
| * |
| * @author cbiffle |
| * |
| */ |
| public static class FakeExecutor implements Executor { |
| List<Runnable> tasks = Lists.newArrayList(); |
| |
| @Override |
| public void execute(Runnable task) { |
| tasks.add(task); |
| } |
| |
| public List<Runnable> getTasks() { |
| return tasks; |
| } |
| } |
| |
| } |