| /* |
| * Copyright (c) 2015, Oracle and/or its affiliates. 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| import java.util.Arrays; |
| import java.util.ConcurrentModificationException; |
| import java.util.HashMap; |
| import java.util.Hashtable; |
| import java.util.Iterator; |
| import java.util.LinkedHashMap; |
| import java.util.Map; |
| import java.util.function.BiFunction; |
| |
| import org.testng.annotations.Test; |
| import org.testng.annotations.DataProvider; |
| |
| /** |
| * @test |
| * @bug 8071667 |
| * @summary Ensure that ConcurrentModificationExceptions are thrown as specified from Map methods that accept Functions |
| * @author bchristi |
| * @build Defaults |
| * @run testng FunctionalCMEs |
| */ |
| public class FunctionalCMEs { |
| static final String KEY = "key"; |
| |
| @DataProvider(name = "Maps", parallel = true) |
| private static Iterator<Object[]> makeMaps() { |
| return Arrays.asList( |
| // Test maps that CME |
| new Object[]{new HashMap<>(), true}, |
| new Object[]{new Hashtable<>(), true}, |
| new Object[]{new LinkedHashMap<>(), true}, |
| // Test default Map methods - no CME |
| new Object[]{new Defaults.ExtendsAbstractMap<>(), false} |
| ).iterator(); |
| } |
| |
| @Test(dataProvider = "Maps") |
| public void testComputeIfAbsent(Map<String,String> map, boolean expectCME) { |
| checkCME(() -> { |
| map.computeIfAbsent(KEY, k -> { |
| putToForceRehash(map); |
| return "computedValue"; |
| }); |
| }, expectCME); |
| } |
| |
| @Test(dataProvider = "Maps") |
| public void testCompute(Map<String,String> map, boolean expectCME) { |
| checkCME(() -> { |
| map.compute(KEY, mkBiFunc(map)); |
| }, expectCME); |
| } |
| |
| @Test(dataProvider = "Maps") |
| public void testComputeWithKeyMapped(Map<String,String> map, boolean expectCME) { |
| map.put(KEY, "firstValue"); |
| checkCME(() -> { |
| map.compute(KEY, mkBiFunc(map)); |
| }, expectCME); |
| } |
| |
| @Test(dataProvider = "Maps") |
| public void testComputeIfPresent(Map<String,String> map, boolean expectCME) { |
| map.put(KEY, "firstValue"); |
| checkCME(() -> { |
| map.computeIfPresent(KEY, mkBiFunc(map)); |
| }, expectCME); |
| } |
| |
| @Test(dataProvider = "Maps") |
| public void testMerge(Map<String,String> map, boolean expectCME) { |
| map.put(KEY, "firstValue"); |
| checkCME(() -> { |
| map.merge(KEY, "nextValue", mkBiFunc(map)); |
| }, expectCME); |
| } |
| |
| @Test(dataProvider = "Maps") |
| public void testForEach(Map<String,String> map, boolean ignored) { |
| checkCME(() -> { |
| map.put(KEY, "firstValue"); |
| putToForceRehash(map); |
| map.forEach((k,v) -> { |
| map.remove(KEY); |
| }); |
| }, true); |
| } |
| |
| @Test(dataProvider = "Maps") |
| public void testReplaceAll(Map<String,String> map, boolean ignored) { |
| checkCME(() -> { |
| map.put(KEY, "firstValue"); |
| putToForceRehash(map); |
| map.replaceAll((k,v) -> { |
| map.remove(KEY); |
| return "computedValue"; |
| }); |
| },true); |
| } |
| |
| private static void checkCME(Runnable code, boolean expectCME) { |
| try { |
| code.run(); |
| } catch (ConcurrentModificationException cme) { |
| if (expectCME) { return; } else { throw cme; } |
| } |
| if (expectCME) { |
| throw new RuntimeException("Expected CME, but wasn't thrown"); |
| } |
| } |
| |
| private static BiFunction<String,String,String> mkBiFunc(Map<String,String> map) { |
| return (k,v) -> { |
| putToForceRehash(map); |
| return "computedValue"; |
| }; |
| } |
| |
| private static void putToForceRehash(Map<String,String> map) { |
| for (int i = 0; i < 64; ++i) { |
| map.put(i + "", "value"); |
| } |
| } |
| } |