1/* 2 * Copyright (C) 2012 Google Inc. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package libcore.java.util; 18 19import java.io.Serializable; 20import java.util.AbstractCollection; 21import java.util.concurrent.atomic.AtomicBoolean; 22import java.util.concurrent.ConcurrentHashMap; 23import junit.framework.TestCase; 24 25public final class AbstractCollectionTest extends TestCase { 26 // http://code.google.com/p/android/issues/detail?id=36519 27 public void test_toArray() throws Exception { 28 final ConcurrentHashMap<Integer, Integer> m = new ConcurrentHashMap<Integer, Integer>(); 29 final AtomicBoolean finished = new AtomicBoolean(false); 30 31 Thread reader = new Thread(new Runnable() { 32 @Override public void run() { 33 while (!finished.get()) { 34 m.values().toArray(); 35 m.values().toArray(new Integer[m.size()]); 36 } 37 } 38 }); 39 40 Thread mutator = new Thread(new Runnable() { 41 @Override public void run() { 42 for (int i = 0; i < 100; ++i) { 43 m.put(-i, -i); 44 } 45 for (int i = 0; i < 4096; ++i) { 46 m.put(i, i); 47 m.remove(i); 48 } 49 finished.set(true); 50 } 51 }); 52 53 reader.start(); 54 mutator.start(); 55 reader.join(); 56 mutator.join(); 57 } 58} 59