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 javafx.collections; 27 28 import com.sun.javafx.collections.NonIterableChange; 29 import com.sun.javafx.collections.ObservableListWrapper; 30 import org.junit.Test; 31 32 import java.util.ArrayList; 33 import java.util.Collections; 34 35 import static org.junit.Assert.*; 36 37 public class WeakListChangeListenerTest { 38 39 @Test(expected=NullPointerException.class) 40 public void testConstructWithNull() { 41 new WeakListChangeListener<Object>(null); 42 } 43 44 @Test 45 public void testHandle() { 46 MockListObserver<Object> listener = new MockListObserver<Object>(); 47 final WeakListChangeListener<Object> weakListener = new WeakListChangeListener<Object>(listener); 48 final ObservableListWrapper<Object> list = new ObservableListWrapper<Object>(new ArrayList<Object>()); 49 final Object removedElement = new Object(); 50 final ListChangeListener.Change<Object> change = new NonIterableChange.SimpleRemovedChange<Object>(0, 1, removedElement, list); 51 52 // regular call 53 weakListener.onChanged(change); 54 listener.check1AddRemove(list, Collections.singletonList(removedElement), 0, 1); 55 assertFalse(weakListener.wasGarbageCollected()); 56 57 // GC-ed call 58 listener = null; 59 System.gc(); 60 assertTrue(weakListener.wasGarbageCollected()); 61 weakListener.onChanged(change); 62 63 } 64 65 }