90 lines
3.3 KiB
Java
90 lines
3.3 KiB
Java
/*
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* Copyright (c) 2014, 2015, 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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import java.awt.datatransfer.DataFlavor;
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/**
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* @test
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* @bug 8038999
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* @summary DataFlavor.equals is not symmetric
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* @author Petr Pchelko <petr.pchelko@oracle.com>
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* @modules java.datatransfer
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*/
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public class EqualsHashCodeSymmetryTest {
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private static final DataFlavor[] dataFlavors = {
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DataFlavor.stringFlavor,
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DataFlavor.imageFlavor,
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DataFlavor.javaFileListFlavor,
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DataFlavor.allHtmlFlavor,
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DataFlavor.selectionHtmlFlavor,
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DataFlavor.fragmentHtmlFlavor,
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createFlavor("text/html; class=java.lang.String"),
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new DataFlavor(String.class, "My test flavor number 1"),
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new DataFlavor(String.class, "My test flavor number 2"),
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new DataFlavor(StringBuilder.class, "My test flavor number 1")
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};
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public static void main(String[] args) {
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testEqualsSymmetry();
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testEqualsHashCodeConsistency();
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testSimpleCollision();
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}
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private static void testEqualsSymmetry() {
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for (DataFlavor flavor1 : dataFlavors) {
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for (DataFlavor flavor2 : dataFlavors) {
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if (flavor1.equals(flavor2) != flavor2.equals(flavor1)) {
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throw new RuntimeException(
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String.format("Equals is not symmetric for %s and %s", flavor1, flavor2));
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}
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}
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}
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}
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private static void testEqualsHashCodeConsistency() {
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for (DataFlavor flavor1 : dataFlavors) {
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for (DataFlavor flavor2 : dataFlavors) {
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if ((flavor1.equals(flavor2) && flavor1.hashCode() != flavor2.hashCode())) {
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throw new RuntimeException(
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String.format("Equals and hash code not consistent for %s and %s", flavor1, flavor2));
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}
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}
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}
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}
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private static void testSimpleCollision() {
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if (createFlavor("text/html; class=java.lang.String").hashCode() == DataFlavor.allHtmlFlavor.hashCode()) {
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throw new RuntimeException("HashCode collision because the document parameter is not used");
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}
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}
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private static DataFlavor createFlavor(String mime) {
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try {
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return new DataFlavor(mime);
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} catch (ClassNotFoundException e) {
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throw new RuntimeException(e);
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}
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}
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}
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