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.beans; 27 28 import static org.junit.Assert.assertEquals; 29 import static org.junit.Assert.assertFalse; 30 import static org.junit.Assert.assertTrue; 31 import javafx.beans.value.ChangeListener; 32 import javafx.beans.value.ObservableValue; 33 34 import org.junit.Test; 35 36 public class WeakInvalidationListenerTest { 37 38 @Test(expected=NullPointerException.class) 39 public void testConstructWithNull() { 40 new WeakInvalidationListener(null); 41 } 42 43 @Test 44 public void testHandle() { 45 InvalidationListenerMock listener = new InvalidationListenerMock(); 46 final WeakInvalidationListener weakListener = new WeakInvalidationListener(listener); 47 final ObservableMock o = new ObservableMock(); 48 49 // regular call 50 weakListener.invalidated(o); 51 listener.check(o, 1); 52 assertFalse(weakListener.wasGarbageCollected()); 53 54 // GC-ed call 55 o.reset(); 56 listener = null; 57 System.gc(); 58 assertTrue(weakListener.wasGarbageCollected()); 59 weakListener.invalidated(o); 60 assertEquals(1, o.removeCounter); 61 } 62 63 private static class ObservableMock implements ObservableValue<Object> { 64 private int removeCounter; 65 66 private void reset() { 67 removeCounter = 0; 68 } 69 70 @Override 71 public Object getValue() { 72 return null; 73 } 74 75 @Override 76 public void addListener(InvalidationListener listener) { 77 // not used 78 } 79 80 @Override 81 public void addListener(ChangeListener<? super Object> listener) { 82 // not used 83 } 84 85 @Override 86 public void removeListener(InvalidationListener listener) { 87 removeCounter++; 88 } 89 90 @Override 91 public void removeListener(ChangeListener<? super Object> listener) { 92 // not used 93 } 94 95 } 96 97 }