1 /* 2 * Copyright (C) 2007 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 static com.google.common.base.Preconditions.checkNotNull; 20 21 import com.google.common.collect.testing.SetTestSuiteBuilder; 22 import com.google.common.collect.testing.TestStringSetGenerator; 23 import com.google.common.collect.testing.features.CollectionFeature; 24 import com.google.common.collect.testing.features.CollectionSize; 25 26 import junit.framework.Test; 27 import junit.framework.TestCase; 28 29 import java.io.Serializable; 30 import java.util.Collection; 31 import java.util.Collections; 32 import java.util.HashSet; 33 import java.util.Set; 34 35 import javax.annotation.Nullable; 36 37 /** 38 * Tests for {@code Synchronized#set}. 39 * 40 * @author Mike Bostock 41 */ 42 public class SynchronizedSetTest extends TestCase { 43 44 public static final Object MUTEX = new Integer(1); // something Serializable 45 suite()46 public static Test suite() { 47 return SetTestSuiteBuilder.using(new TestStringSetGenerator() { 48 @Override 49 protected Set<String> create(String[] elements) { 50 TestSet<String> inner = new TestSet<String>(new HashSet<String>(), MUTEX); 51 Set<String> outer = Synchronized.set(inner, inner.mutex); 52 Collections.addAll(outer, elements); 53 return outer; 54 } 55 }) 56 .named("Synchronized.set") 57 .withFeatures(CollectionFeature.GENERAL_PURPOSE, 58 CollectionFeature.ALLOWS_NULL_VALUES, 59 CollectionSize.ANY, 60 CollectionFeature.SERIALIZABLE) 61 .createTestSuite(); 62 } 63 64 static class TestSet<E> extends ForwardingSet<E> implements Serializable { 65 final Set<E> delegate; 66 public final Object mutex; 67 68 public TestSet(Set<E> delegate, Object mutex) { 69 checkNotNull(mutex); 70 this.delegate = delegate; 71 this.mutex = mutex; 72 } 73 74 @Override protected Set<E> delegate() { 75 return delegate; 76 } 77 78 @Override public String toString() { 79 assertTrue(Thread.holdsLock(mutex)); 80 return super.toString(); 81 } 82 83 @Override public boolean equals(@Nullable Object o) { 84 assertTrue(Thread.holdsLock(mutex)); 85 return super.equals(o); 86 } 87 88 @Override public int hashCode() { 89 assertTrue(Thread.holdsLock(mutex)); 90 return super.hashCode(); 91 } 92 93 @Override public boolean add(@Nullable E o) { 94 assertTrue(Thread.holdsLock(mutex)); 95 return super.add(o); 96 } 97 98 @Override public boolean addAll(Collection<? extends E> c) { 99 assertTrue(Thread.holdsLock(mutex)); 100 return super.addAll(c); 101 } 102 103 @Override public void clear() { 104 assertTrue(Thread.holdsLock(mutex)); 105 super.clear(); 106 } 107 108 @Override public boolean contains(@Nullable Object o) { 109 assertTrue(Thread.holdsLock(mutex)); 110 return super.contains(o); 111 } 112 113 @Override public boolean containsAll(Collection<?> c) { 114 assertTrue(Thread.holdsLock(mutex)); 115 return super.containsAll(c); 116 } 117 118 @Override public boolean isEmpty() { 119 assertTrue(Thread.holdsLock(mutex)); 120 return super.isEmpty(); 121 } 122 123 /* Don't test iterator(); it may or may not hold the mutex. */ 124 125 @Override public boolean remove(@Nullable Object o) { 126 assertTrue(Thread.holdsLock(mutex)); 127 return super.remove(o); 128 } 129 130 @Override public boolean removeAll(Collection<?> c) { 131 assertTrue(Thread.holdsLock(mutex)); 132 return super.removeAll(c); 133 } 134 135 @Override public boolean retainAll(Collection<?> c) { 136 assertTrue(Thread.holdsLock(mutex)); 137 return super.retainAll(c); 138 } 139 140 @Override public int size() { 141 assertTrue(Thread.holdsLock(mutex)); 142 return super.size(); 143 } 144 145 @Override public Object[] toArray() { 146 assertTrue(Thread.holdsLock(mutex)); 147 return super.toArray(); 148 } 149 150 @Override public <T> T[] toArray(T[] a) { 151 assertTrue(Thread.holdsLock(mutex)); 152 return super.toArray(a); 153 } 154 155 private static final long serialVersionUID = 0; 156 } 157 } 158