/*******************************************************************************
 * Copyright (c) 2011, 2015 Frank Appel and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    Frank Appel - initial API and implementation
 *    EclipseSource - ongoing development
 ******************************************************************************/
package org.eclipse.rap.rwt.osgi.internal;

import static org.mockito.Matchers.any;
import static org.mockito.Mockito.doAnswer;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.verify;

import org.eclipse.rap.rwt.application.ApplicationConfiguration;
import org.junit.Before;
import org.junit.Test;
import org.mockito.invocation.InvocationOnMock;
import org.mockito.stubbing.Answer;
import org.osgi.framework.*;


public class ApplicationConfigurationTracker_Test {

  private BundleContext bundleContext;
  private ApplicationLauncherImpl applicationLauncher;
  private ServiceReference< ApplicationConfiguration> configurationReference;
  private ApplicationConfiguration configurator;
  private ApplicationConfigurationTracker tracker;

  @Before
  public void setUp() throws Exception {
    mockBundleContext();
    applicationLauncher = mock( ApplicationLauncherImpl.class );
    tracker = new ApplicationConfigurationTracker( bundleContext, applicationLauncher );
    configurationReference = mock( ServiceReference.class );
    configurator = mock( ApplicationConfiguration.class );
  }

  @Test
  public void testAddingService() {
    tracker.addingService( configurationReference );

    verify( applicationLauncher ).addConfiguration( configurationReference );
  }

  @Test
  public void testRemovedService() {
    tracker.removedService( configurationReference, configurator );

    verify( applicationLauncher ).removeConfiguration( configurator );
  }

  @Test
  public void testOpen() {
    tracker.open();

    verify( applicationLauncher ).addConfiguration( configurationReference );
  }

  private void mockBundleContext() throws InvalidSyntaxException {
    bundleContext = mock( BundleContext.class );
    doAnswer( createServiceRegistrationTrigger() )
     .when( bundleContext ).addServiceListener( any( ServiceListener.class ), any( String.class ) );
  }

  private Answer<Object> createServiceRegistrationTrigger() {
    return new Answer<Object>() {
      @Override
      public Object answer( InvocationOnMock invocation ) throws Throwable {
        triggerServiceRegistration( invocation );
        return null;
      }
    };
  }

  private void triggerServiceRegistration( InvocationOnMock invocation ) {
    ServiceListener listener = ( ServiceListener )invocation.getArguments()[ 0 ];
    listener.serviceChanged( new ServiceEvent( ServiceEvent.REGISTERED, configurationReference ) );
  }

}