util/src/test/java/org/apache/aries/util/SingleServiceTrackerTest.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.aries.util;

import org.apache.aries.mocks.BundleContextMock;
import org.apache.aries.unittest.mocks.MethodCall;
import org.apache.aries.unittest.mocks.Skeleton;
import org.apache.aries.util.SingleServiceTracker.SingleServiceListener;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.osgi.framework.BundleContext;

import static org.junit.Assert.*;

public class SingleServiceTrackerTest {
  private BundleContext ctx;
  private SingleServiceTracker<String> sut;
  private SingleServiceTracker.SingleServiceListener listener;
  
  @Before
  public void setup() {
    ctx = Skeleton.newMock(new BundleContextMock(), BundleContext.class);
  }
  
  @After
  public void teardown() {
    BundleContextMock.clear();
  }
  
  private void createSut() {
    listener = Skeleton.newMock(SingleServiceListener.class);
    sut = new SingleServiceTracker<String>(ctx, String.class, listener);
    sut.open();
  }
  
  @Test
  public void testAfterTheFactService() 
  {
    createSut();
    Skeleton.getSkeleton(listener).assertSkeletonNotCalled();
    
    ctx.registerService("java.lang.String", "uno", null);
    Skeleton.getSkeleton(listener).assertCalled(new MethodCall(SingleServiceListener.class, "serviceFound"));
    
    assertEquals("uno", sut.getService());
  }
  
  @Test
  public void testDoubleRegistration() {
    testAfterTheFactService();
    
    Skeleton.getSkeleton(listener).clearMethodCalls();
    ctx.registerService("java.lang.String", "due", null);
    
    Skeleton.getSkeleton(listener).assertSkeletonNotCalled();
    assertEquals("uno", sut.getService());
  }
  
  @Test
  public void testRegistrationWhileClosed() {
    createSut();
    sut.close();
    
    ctx.registerService("java.lang.String", "uno", null);
    Skeleton.getSkeleton(listener).assertSkeletonNotCalled();
    
    assertNull(sut.getService());
  }
  
}