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