/*
* $Id$
*
* Copyright 2006 Sun Microsystems, Inc., 4150 Network Circle,
* Santa Clara, California 95054, U.S.A. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
package org.jdesktop.swingx.event;
import javax.swing.event.ChangeListener;
import junit.framework.TestCase;
import org.jdesktop.test.ChangeReport;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/**
* Unit tests for SwingX' EventListenerList. Testing the
* mechanics of mutations and returned listener arrays. <p>
*
* PENDING: any way to unit test memory leaks?
*
* @author Jeanette Winzenburg
*/
@RunWith(JUnit4.class)
public class WeakEventListenerListTest extends TestCase {
/**
* Test intial getListenerList
*
*/
@Test
public void testGetListenerListInitial() {
WeakEventListenerList list = new WeakEventListenerList();
// must return empty array
assertNotNull("array must be not null", list.getListenerList());
assertEquals("array must be empty", 0, list.getListenerList().length);
}
/**
* test sequence in array.
*
*/
@Test
public void testGetListenerListAddRemove() {
WeakEventListenerList list = new WeakEventListenerList();
// add one changeListener
ChangeReport changeReport = new ChangeReport();
list.add(ChangeListener.class, changeReport);
Object[] array = list.getListenerList();
assertEquals("array must have 2 elements", 2, array.length);
assertSame("listener class must be at 0", ChangeListener.class, array[0]);
assertSame("added listener must be at 1", changeReport, array[1]);
// add a second
ChangeReport otherReport = new ChangeReport();
list.add(ChangeListener.class, otherReport);
Object[] otherArray = list.getListenerList();
assertEquals("array must have 4 elements", 4, otherArray.length);
assertSame(ChangeListener.class, otherArray[0]);
assertSame(changeReport, otherArray[1]);
assertSame(ChangeListener.class, otherArray[2]);
assertSame(otherReport, otherArray[3]);
list.remove(ChangeListener.class, changeReport);
Object[] removedArray = list.getListenerList();
assertEquals("array must have 2 elements", 2, removedArray.length);
assertSame("listener class must be at 0", ChangeListener.class, removedArray[0]);
assertSame("added listener must be at 1", otherReport, removedArray[1]);
}
@Test
public void testGetListenersInitial() {
WeakEventListenerList list = new WeakEventListenerList();
// must return empty array
assertNotNull("array must be not null", list.getListeners(ChangeListener.class));
assertEquals("array must be empty", 0, list.getListeners(ChangeListener.class).length);
}
/**
* test sequence in array.
*
*/
@Test
public void testGetListenersAddRemove() {
WeakEventListenerList list = new WeakEventListenerList();
// add one changeListener
ChangeReport changeReport = new ChangeReport();
list.add(ChangeListener.class, changeReport);
ChangeListener[] array = list.getListeners(ChangeListener.class);
assertEquals("array must have 2 elements", 1, array.length);
assertSame("added listener must be at 0", changeReport, array[0]);
// add a second
ChangeReport otherReport = new ChangeReport();
list.add(ChangeListener.class, otherReport);
ChangeListener[] otherArray = list.getListeners(ChangeListener.class);
assertEquals("array must have 2 elements", 2, otherArray.length);
assertSame(changeReport, otherArray[0]);
assertSame(otherReport, otherArray[1]);
list.remove(ChangeListener.class, changeReport);
ChangeListener[] removedArray = list.getListeners(ChangeListener.class);
assertEquals("array length", 1, removedArray.length);
assertSame("last added listener must be at 0", otherReport, removedArray[0]);
}
}