guava-tests/test/com/google/common/eventbus/outside/OutsideEventBusTest.java


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/*
 * Copyright (C) 2011 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.outside;

import com.google.common.eventbus.EventBus;
import com.google.common.eventbus.Subscribe;

import junit.framework.TestCase;

import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicReference;

/**
 * Test cases for {@code EventBus} that must not be in the same package.
 *
 * @author Louis Wasserman
 */
public class OutsideEventBusTest extends TestCase {

  /*
   * If you do this test from common.eventbus.EventBusTest, it doesn't actually test the behavior.
   * That is, even if exactly the same method works from inside the common.eventbus package tests,
   * it can fail here.
   */
  public void testAnonymous() {
    final AtomicReference<String> holder = new AtomicReference<String>();
    final AtomicInteger deliveries = new AtomicInteger();
    EventBus bus = new EventBus();
    bus.register(new Object() {
      @Subscribe
      public void accept(String str) {
        holder.set(str);
        deliveries.incrementAndGet();
      }
    });

    String EVENT = "Hello!";
    bus.post(EVENT);

    assertEquals("Only one event should be delivered.", 1, deliveries.get());
    assertEquals("Correct string should be delivered.", EVENT, holder.get());
  }
}