// Copyright 2004 The Apache Software Foundation
//
// 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 org.apache.hivemind.util;
import hivemind.test.FrameworkTestCase;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.apache.hivemind.util.EventListenerList;
/**
* Tests for {@link org.apache.hivemind.util.EventListenerList}.
*
* @author Howard Lewis Ship
*/
public class TestEventListenerList extends FrameworkTestCase
{
private static class Trigger
{
private boolean _trigger;
public boolean isTrigger()
{
return _trigger;
}
public void setTrigger(boolean b)
{
_trigger = b;
}
}
private Trigger[] buildTriggers(int count)
{
Trigger[] result = new Trigger[count];
for (int i = 0; i < count; i++)
{
result[i] = new Trigger();
}
return result;
}
private void addAll(EventListenerList l, Trigger[] t)
{
for (int i = 0; i < t.length; i++)
l.addListener(t[i]);
}
private void checkAllTrue(Trigger[] t)
{
for (int i = 0; i < t.length; i++)
assertEquals(true, t[i].isTrigger());
}
public void testBasic()
{
EventListenerList l = new EventListenerList();
Trigger[] ta = buildTriggers(20);
addAll(l, ta);
Iterator i = l.getListeners();
while (i.hasNext())
{
Trigger t = (Trigger) i.next();
t.setTrigger(true);
}
}
public void testEmptyList()
{
EventListenerList l = new EventListenerList();
Iterator i = l.getListeners();
assertEquals(false, i.hasNext());
}
public void testLateAdd()
{
Trigger[] ta = buildTriggers(20);
EventListenerList l = new EventListenerList();
addAll(l, ta);
Iterator i = l.getListeners();
for (int j = 0; j < 5; j++)
{
Trigger t = (Trigger) i.next();
t.setTrigger(true);
}
Trigger tnew = new Trigger();
l.addListener(tnew);
while (i.hasNext())
{
Trigger t = (Trigger) i.next();
t.setTrigger(true);
}
assertEquals(false, tnew.isTrigger());
checkAllTrue(ta);
}
public void testLateRemove()
{
Trigger[] ta = buildTriggers(20);
EventListenerList l = new EventListenerList();
addAll(l, ta);
Iterator i = l.getListeners();
for (int j = 0; j < 5; j++)
{
Trigger t = (Trigger) i.next();
t.setTrigger(true);
}
Trigger tremoved = ta[15];
l.removeListener(tremoved);
while (i.hasNext())
{
Trigger t = (Trigger) i.next();
t.setTrigger(true);
}
checkAllTrue(ta);
}
public void testRemoveMissing()
{
Trigger[] ta = buildTriggers(20);
EventListenerList l = new EventListenerList();
addAll(l, ta);
Trigger tremove = new Trigger();
l.removeListener(tremove);
Iterator i = l.getListeners();
while (i.hasNext())
{
Trigger t = (Trigger) i.next();
t.setTrigger(true);
}
checkAllTrue(ta);
}
public void testIteratorRemoveFailure()
{
Trigger[] ta = buildTriggers(20);
EventListenerList l = new EventListenerList();
addAll(l, ta);
Iterator i = l.getListeners();
for (int j = 0; j < 5; j++)
i.next();
try
{
i.remove();
unreachable();
}
catch (UnsupportedOperationException ex)
{
}
}
public void testOutOfMemoryError()
{
Trigger ta = buildTriggers(1)[0];
EventListenerList l = new EventListenerList();
List iterators = new ArrayList();
try
{
for (int i = 0; i < 100; i++)
{
l.addListener(ta);
iterators.add(l.getListeners());
l.removeListener(ta);
}
}
catch (OutOfMemoryError e)
{
fail("Ran out of memory!");
}
catch (Throwable e)
{
fail(e.getMessage());
}
}
}