84 lines
2.8 KiB
Java
84 lines
2.8 KiB
Java
/*
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* Copyright (c) 2007, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 5004188
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* @summary Tests how often method equals() is called
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* @author Sergey Malenkov
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*/
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import java.beans.PropertyChangeEvent;
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import java.beans.PropertyVetoException;
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import java.beans.VetoableChangeListener;
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import java.beans.VetoableChangeSupport;
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public final class TestEquals implements VetoableChangeListener {
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private static final String PROPERTY = "property";
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public static void main(String[] args) throws PropertyVetoException {
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TestEquals one = new TestEquals(1);
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TestEquals two = new TestEquals(2);
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Object source = TestEquals.class;
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VetoableChangeSupport vcs = new VetoableChangeSupport(source);
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vcs.addVetoableChangeListener(PROPERTY, one);
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vcs.addVetoableChangeListener(PROPERTY, two);
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PropertyChangeEvent event = new PropertyChangeEvent(source, PROPERTY, one, two);
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vcs.fireVetoableChange(event);
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test(one, two, 1); // only one check
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vcs.fireVetoableChange(PROPERTY, one, two);
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test(one, two, 2); // because it invokes fireVetoableChange(PropertyChangeEvent)
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}
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private static void test(TestEquals v1, TestEquals v2, int amount) {
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int count = v1.count + v2.count;
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if (amount < count)
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throw new Error("method equals() is called " + count + " times");
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v1.count = 0;
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v2.count = 0;
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}
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private final int value;
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private int count;
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private TestEquals(int value) {
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this.value = value;
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}
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@Override
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public boolean equals(Object object) {
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if (object instanceof TestEquals) {
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this.count++;
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TestEquals that = (TestEquals)object;
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return that.value == this.value;
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}
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return false;
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}
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public void vetoableChange(PropertyChangeEvent event) {
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}
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}
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