| /******************************************************************************* |
| * Copyright (c) 2009 Matthew Hall 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: |
| * Matthew Hall - initial API and implementation (bug 255734) |
| ******************************************************************************/ |
| |
| package org.eclipse.core.tests.databinding.observable; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertFalse; |
| import static org.junit.Assert.assertTrue; |
| |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.List; |
| |
| import org.eclipse.core.databinding.observable.ChangeSupport; |
| import org.eclipse.core.databinding.observable.DisposeEvent; |
| import org.eclipse.core.databinding.observable.IDisposeListener; |
| import org.eclipse.core.databinding.observable.IStaleListener; |
| import org.eclipse.core.databinding.observable.Realm; |
| import org.eclipse.core.databinding.observable.StaleEvent; |
| import org.eclipse.jface.tests.databinding.AbstractDefaultRealmTestCase; |
| import org.junit.Before; |
| import org.junit.Test; |
| |
| /** |
| * @since 3.2 |
| * |
| */ |
| public class ChangeSupportTest extends AbstractDefaultRealmTestCase { |
| private ChangeSupportStub changeSupport; |
| |
| @Before |
| public void setUp() throws Exception { |
| super.setUp(); |
| |
| changeSupport = new ChangeSupportStub(Realm.getDefault()); |
| } |
| |
| @Test |
| public void testAddDisposeListener_HasListenersFalse() { |
| IDisposeListener disposeListener = new IDisposeListener() { |
| @Override |
| public void handleDispose(DisposeEvent staleEvent) { |
| } |
| }; |
| IStaleListener staleListener = new IStaleListener() { |
| @Override |
| public void handleStale(StaleEvent staleEvent) { |
| } |
| }; |
| |
| assertFalse(changeSupport.hasListeners()); |
| |
| changeSupport.addDisposeListener(disposeListener); |
| assertFalse(changeSupport.hasListeners()); |
| assertEquals(Collections.EMPTY_LIST, changeSupport.log); |
| |
| changeSupport.addStaleListener(staleListener); |
| assertTrue(changeSupport.hasListeners()); |
| assertEquals(Collections.singletonList(ADD_FIRST), changeSupport.log); |
| |
| changeSupport.removeDisposeListener(disposeListener); |
| assertTrue(changeSupport.hasListeners()); |
| assertEquals(Collections.singletonList(ADD_FIRST), changeSupport.log); |
| |
| changeSupport.removeStaleListener(staleListener); |
| assertFalse(changeSupport.hasListeners()); |
| assertEquals(Arrays.asList(new Object[] { ADD_FIRST, REMOVE_LAST }), changeSupport.log); |
| } |
| |
| private static final String ADD_FIRST = "firstListenerAdded"; |
| private static final String REMOVE_LAST = "lastListenerRemoved"; |
| |
| private static class ChangeSupportStub extends ChangeSupport { |
| List<String> log = new ArrayList<String>(); |
| |
| ChangeSupportStub(Realm realm) { |
| super(realm); |
| } |
| |
| @Override |
| protected void firstListenerAdded() { |
| log.add(ADD_FIRST); |
| } |
| |
| @Override |
| protected void lastListenerRemoved() { |
| log.add(REMOVE_LAST); |
| } |
| |
| @Override |
| protected boolean hasListeners() { |
| return super.hasListeners(); |
| } |
| } |
| } |