1 /* 2 * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package test.javafx.collections; 27 28 import com.sun.javafx.binding.MapExpressionHelper; 29 import com.sun.javafx.collections.ObservableMapWrapper; 30 import org.junit.Test; 31 32 import java.util.HashMap; 33 import javafx.collections.MapChangeListener; 34 import javafx.collections.WeakMapChangeListener; 35 36 import static org.junit.Assert.*; 37 38 public class WeakMapChangeListenerTest { 39 40 @Test(expected=NullPointerException.class) 41 public void testConstructWithNull() { 42 new WeakMapChangeListener<Object, Object>(null); 43 } 44 45 @Test 46 public void testHandle() { 47 MockMapObserver<Object, Object> listener = new MockMapObserver<Object, Object>(); 48 final WeakMapChangeListener<Object, Object> weakListener = new WeakMapChangeListener<Object, Object>(listener); 49 final ObservableMapMock map = new ObservableMapMock(); 50 final Object key = new Object(); 51 final Object value = new Object(); 52 final MapChangeListener.Change<Object, Object> change = new MapExpressionHelper.SimpleChange<Object, Object>(map).setRemoved(key, value); 53 54 // regular call 55 weakListener.onChanged(change); 56 listener.assertRemoved(MockMapObserver.Tuple.tup(key, value)); 57 assertFalse(weakListener.wasGarbageCollected()); 58 59 // GC-ed call 60 map.reset(); 61 listener = null; 62 System.gc(); 63 assertTrue(weakListener.wasGarbageCollected()); 64 weakListener.onChanged(change); 65 assertEquals(1, map.removeCounter); 66 } 67 68 private static class ObservableMapMock extends ObservableMapWrapper<Object, Object> { 69 private int removeCounter; 70 71 public ObservableMapMock() { 72 super(new HashMap<Object, Object>()); 73 } 74 75 private void reset() { 76 removeCounter = 0; 77 } 78 79 @Override 80 public void removeListener(MapChangeListener<? super Object, ? super Object> listener) { 81 removeCounter++; 82 } 83 } 84 85 }