1 /* 2 * Copyright (C) 2008 The Guava Authors 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 17 package com.google.common.collect; 18 19 import java.util.concurrent.ConcurrentSkipListMap; 20 import java.util.concurrent.atomic.AtomicInteger; 21 22 /** 23 * Unit test for {@link ConcurrentHashMultiset} behavior when backed by 24 * {@link ConcurrentSkipListMap}. User code cannot create such a multiset, since 25 * the constructor we use here is package-private, but 26 * {@link ConcurrentHashMultiset} should work regardless of the type of its 27 * backing map, and it's possible that this test could catch a bug that the 28 * standard test doesn't. 29 * 30 * @author Chris Povirk 31 * @author Jared Levy 32 */ 33 public class ConcurrentHashMultisetWithCslmTest 34 extends AbstractConcurrentHashMultisetTest { create()35 @Override protected <E> Multiset<E> create() { 36 return new ConcurrentHashMultiset<E>( 37 new ConcurrentSkipListMap<E, AtomicInteger>()); 38 } 39 } 40