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package org.eclipse.jpt.utility.tests.internal;
import java.io.Serializable;
import java.util.EventListener;
import junit.framework.TestCase;
import org.eclipse.jpt.utility.internal.CollectionTools;
import org.eclipse.jpt.utility.internal.ListenerList;
@SuppressWarnings("nls")
public class ListenerListTests extends TestCase {
public ListenerListTests(String name) {
super(name);
}
public void testGetListeners() throws Exception {
ListenerList<Listener> listenerList = new ListenerList<Listener>(Listener.class);
Listener listener1 = new LocalListener();
Listener listener2 = new LocalListener();
Iterable<Listener> listeners = listenerList.getListeners();
assertEquals(0, CollectionTools.size(listeners));
listenerList.add(listener1);
listenerList.add(listener2);
listeners = listenerList.getListeners();
assertEquals(2, CollectionTools.size(listeners));
assertTrue(CollectionTools.contains(listeners, listener1));
assertTrue(CollectionTools.contains(listeners, listener2));
}
public void testSize() throws Exception {
ListenerList<Listener> listenerList = new ListenerList<Listener>(Listener.class);
Listener listener1 = new LocalListener();
Listener listener2 = new LocalListener();
assertEquals(0, listenerList.size());
listenerList.add(listener1);
listenerList.add(listener2);
assertEquals(2, listenerList.size());
}
public void testIsEmpty() throws Exception {
ListenerList<Listener> listenerList = new ListenerList<Listener>(Listener.class);
Listener listener1 = new LocalListener();
Listener listener2 = new LocalListener();
assertTrue(listenerList.isEmpty());
listenerList.add(listener1);
listenerList.add(listener2);
assertFalse(listenerList.isEmpty());
}
public void testAdd_null() throws Exception {
ListenerList<Listener> listenerList = new ListenerList<Listener>(Listener.class);
boolean exCaught = false;
try {
listenerList.add(null);
fail("invalid listener list: " + listenerList);
} catch (NullPointerException ex) {
exCaught = true;
}
assertTrue(exCaught);
}
public void testAdd_duplicate() throws Exception {
ListenerList<Listener> listenerList = new ListenerList<Listener>(Listener.class);
Listener listener = new LocalListener();
listenerList.add(listener);
boolean exCaught = false;
try {
listenerList.add(listener);
fail("invalid listener list: " + listenerList);
} catch (IllegalArgumentException ex) {
exCaught = true;
}
assertTrue(exCaught);
}
public void testRemove() throws Exception {
ListenerList<Listener> listenerList = new ListenerList<Listener>(Listener.class);
Listener listener1 = new LocalListener();
Listener listener2 = new LocalListener();
listenerList.add(listener1);
listenerList.add(listener2);
assertTrue(CollectionTools.contains(listenerList.getListeners(), listener1));
assertTrue(CollectionTools.contains(listenerList.getListeners(), listener2));
listenerList.remove(listener1);
assertFalse(CollectionTools.contains(listenerList.getListeners(), listener1));
assertTrue(CollectionTools.contains(listenerList.getListeners(), listener2));
listenerList.remove(listener2);
assertFalse(CollectionTools.contains(listenerList.getListeners(), listener2));
}
public void testRemove_null() throws Exception {
ListenerList<Listener> listenerList = new ListenerList<Listener>(Listener.class);
boolean exCaught = false;
try {
listenerList.remove(null);
fail("invalid listener list: " + listenerList);
} catch (NullPointerException ex) {
exCaught = true;
}
assertTrue(exCaught);
}
public void testRemove_unregistered() throws Exception {
ListenerList<Listener> listenerList = new ListenerList<Listener>(Listener.class);
Listener listener = new LocalListener();
listenerList.add(listener);
listenerList.remove(listener);
boolean exCaught = false;
try {
listenerList.remove(listener);
fail("invalid listener list: " + listenerList);
} catch (IllegalArgumentException ex) {
exCaught = true;
}
assertTrue(exCaught);
}
public void testClear() throws Exception {
ListenerList<Listener> listenerList = new ListenerList<Listener>(Listener.class);
Listener listener1 = new LocalListener();
Listener listener2 = new LocalListener();
listenerList.add(listener1);
listenerList.add(listener2);
assertTrue(CollectionTools.contains(listenerList.getListeners(), listener1));
assertTrue(CollectionTools.contains(listenerList.getListeners(), listener2));
listenerList.clear();
assertFalse(CollectionTools.contains(listenerList.getListeners(), listener1));
assertFalse(CollectionTools.contains(listenerList.getListeners(), listener2));
}
//TODO - This test doesn't pass in the Eclipse build environment (Linux) for some reason
// public void testSerialization() throws Exception {
// ListenerList<Listener> listenerList = new ListenerList<Listener>(Listener.class);
// Listener listener1 = new LocalListener();
// Listener listener2 = new LocalListener();
// listenerList.add(listener1);
// listenerList.add(listener2);
//
// ListenerList<Listener> listenerList2 = TestTools.serialize(listenerList);
// assertNotSame(listenerList, listenerList2);
// assertEquals(2, listenerList2.size());
//
// Listener listener3 = new NonSerializableListener();
// listenerList.add(listener3);
//
// listenerList2 = TestTools.serialize(listenerList);
// assertNotSame(listenerList, listenerList2);
// assertEquals(2, listenerList2.size());
//
// }
interface Listener extends EventListener {
void somethingHappened();
}
static class LocalListener implements Listener, Serializable {
public void somethingHappened() {
// do nothing
}
}
static class NonSerializableListener implements Listener {
public void somethingHappened() {
// do nothing
}
}
}
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