1 /* 2 * Copyright (c) 2015, 2020, 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 import java.util.Arrays; 27 import java.util.ConcurrentModificationException; 28 import java.util.HashMap; 29 import java.util.Hashtable; 30 import java.util.Iterator; 31 import java.util.LinkedHashMap; 32 import java.util.Map; 33 import java.util.TreeMap; 34 import java.util.function.BiFunction; 35 36 import org.testng.annotations.Test; 37 import org.testng.annotations.DataProvider; 38 39 /** 40 * @test 41 * @bug 8071667 42 * @summary Ensure that ConcurrentModificationExceptions are thrown as specified from Map methods that accept Functions 43 * @author bchristi 44 * @build Defaults 45 * @run testng FunctionalCMEs 46 */ 47 public class FunctionalCMEs { 48 static final String KEY = "key"; 49 50 @DataProvider(name = "Maps", parallel = true) 51 private static Iterator<Object[]> makeMaps() { 52 return Arrays.asList( 53 // Test maps that CME 54 new Object[]{new HashMap<>(), true}, 55 new Object[]{new Hashtable<>(), true}, 56 new Object[]{new LinkedHashMap<>(), true}, 57 new Object[]{new TreeMap<>(), true}, 58 // Test default Map methods - no CME 59 new Object[]{new Defaults.ExtendsAbstractMap<>(), false} 60 ).iterator(); 61 } 62 63 @Test(dataProvider = "Maps") 64 public void testComputeIfAbsent(Map<String,String> map, boolean expectCME) { 65 checkCME(() -> { 66 map.computeIfAbsent(KEY, k -> { 67 putToForceRehash(map); 68 return "computedValue"; 69 }); 70 }, expectCME); 71 } 72 73 @Test(dataProvider = "Maps") 74 public void testCompute(Map<String,String> map, boolean expectCME) { 75 checkCME(() -> { 76 map.compute(KEY, mkBiFunc(map)); 77 }, expectCME); 78 } 79 80 @Test(dataProvider = "Maps") 81 public void testComputeWithKeyMapped(Map<String,String> map, boolean expectCME) { 82 map.put(KEY, "firstValue"); 83 checkCME(() -> { 84 map.compute(KEY, mkBiFunc(map)); 85 }, expectCME); 86 } 87 88 @Test(dataProvider = "Maps") 89 public void testComputeIfPresent(Map<String,String> map, boolean expectCME) { 90 map.put(KEY, "firstValue"); 91 checkCME(() -> { 92 map.computeIfPresent(KEY, mkBiFunc(map)); 93 }, expectCME); 94 } 95 96 @Test(dataProvider = "Maps") 97 public void testMerge(Map<String,String> map, boolean expectCME) { 98 map.put(KEY, "firstValue"); 99 checkCME(() -> { 100 map.merge(KEY, "nextValue", mkBiFunc(map)); 101 }, expectCME); 102 } 103 104 @Test(dataProvider = "Maps") 105 public void testForEach(Map<String,String> map, boolean ignored) { 106 checkCME(() -> { 107 map.put(KEY, "firstValue"); 108 putToForceRehash(map); 109 map.forEach((k,v) -> { 110 map.remove(KEY); 111 }); 112 }, true); 113 } 114 115 @Test(dataProvider = "Maps") 116 public void testReplaceAll(Map<String,String> map, boolean ignored) { 117 checkCME(() -> { 118 map.put(KEY, "firstValue"); 119 putToForceRehash(map); 120 map.replaceAll((k,v) -> { 121 map.remove(KEY); 122 return "computedValue"; 123 }); 124 },true); 125 } 126 127 private static void checkCME(Runnable code, boolean expectCME) { 128 try { 129 code.run(); 130 } catch (ConcurrentModificationException cme) { 131 if (expectCME) { return; } else { throw cme; } 132 } 133 if (expectCME) { 134 throw new RuntimeException("Expected CME, but wasn't thrown"); 135 } 136 } 137 138 private static BiFunction<String,String,String> mkBiFunc(Map<String,String> map) { 139 return (k,v) -> { 140 putToForceRehash(map); 141 return "computedValue"; 142 }; 143 } 144 145 private static void putToForceRehash(Map<String,String> map) { 146 for (int i = 0; i < 64; ++i) { 147 map.put(i + "", "value"); 148 } 149 } 150 }