--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/beans/VetoableChangeSupport/TestEquals.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,83 @@
+/*
+ * Copyright 2007 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+/*
+ * @test
+ * @bug 5004188
+ * @summary Tests how often method equals() is called
+ * @author Sergey Malenkov
+ */
+
+import java.beans.PropertyChangeEvent;
+import java.beans.PropertyVetoException;
+import java.beans.VetoableChangeListener;
+import java.beans.VetoableChangeSupport;
+
+public final class TestEquals implements VetoableChangeListener {
+    private static final String PROPERTY = "property";
+
+    public static void main(String[] args) throws PropertyVetoException {
+        TestEquals one = new TestEquals(1);
+        TestEquals two = new TestEquals(2);
+
+        Object source = TestEquals.class;
+        VetoableChangeSupport vcs = new VetoableChangeSupport(source);
+        vcs.addVetoableChangeListener(PROPERTY, one);
+        vcs.addVetoableChangeListener(PROPERTY, two);
+
+        PropertyChangeEvent event = new PropertyChangeEvent(source, PROPERTY, one, two);
+        vcs.fireVetoableChange(event);
+        test(one, two, 1); // only one check
+        vcs.fireVetoableChange(PROPERTY, one, two);
+        test(one, two, 2); // because it invokes fireVetoableChange(PropertyChangeEvent)
+    }
+
+    private static void test(TestEquals v1, TestEquals v2, int amount) {
+        int count = v1.count + v2.count;
+        if (amount < count)
+            throw new Error("method equals() is called " + count + " times");
+
+        v1.count = 0;
+        v2.count = 0;
+    }
+
+    private final int value;
+    private int count;
+
+    private TestEquals(int value) {
+        this.value = value;
+    }
+
+    @Override
+    public boolean equals(Object object) {
+        if (object instanceof TestEquals) {
+            this.count++;
+            TestEquals that = (TestEquals)object;
+            return that.value == this.value;
+        }
+        return false;
+    }
+
+    public void vetoableChange(PropertyChangeEvent event) {
+    }
+}