1/* 2 * Copyright (c) 2016, 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. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24/* 25 * @test 26 * @bug 8139233 27 * @summary ensure entry set's iterator doesn't have side effects on the entry set 28 * @run testng EntrySetIterator 29 */ 30 31import java.util.*; 32import org.testng.annotations.Test; 33import static org.testng.Assert.assertTrue; 34import static org.testng.Assert.assertEquals; 35 36public class EntrySetIterator { 37 @Test 38 public void main() { 39 Map<String, String> map = Map.of("a", "1", "b", "2", "c", "3"); 40 Set<Map.Entry<String, String>> entrySet = map.entrySet(); 41 Iterator<Map.Entry<String, String>> iterator = entrySet.iterator(); 42 43 assertTrue(iterator.hasNext()); 44 45 // copying implicitly iterates an iterator 46 Set<Map.Entry<String, String>> copy1 = new HashSet<>(entrySet); 47 Set<Map.Entry<String, String>> copy2 = new HashSet<>(entrySet); 48 49 assertEquals(copy2, copy1); 50 assertTrue(iterator.hasNext()); 51 } 52} 53