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 com.google.common.collect.testing.SetTestSuiteBuilder; 20 import com.google.common.collect.testing.TestStringSetGenerator; 21 import com.google.common.collect.testing.features.CollectionFeature; 22 import com.google.common.collect.testing.features.CollectionSize; 23 import java.io.Serializable; 24 import java.util.Collection; 25 import java.util.Collections; 26 import java.util.HashSet; 27 import java.util.Set; 28 import junit.framework.Test; 29 import junit.framework.TestCase; 30 import org.checkerframework.checker.nullness.qual.Nullable; 31 32 /** 33 * Tests for {@code Synchronized#set}. 34 * 35 * @author Mike Bostock 36 */ 37 public class SynchronizedSetTest extends TestCase { 38 39 public static final Object MUTEX = new Integer(1); // something Serializable 40 suite()41 public static Test suite() { 42 return SetTestSuiteBuilder.using( 43 new TestStringSetGenerator() { 44 @Override 45 protected Set<String> create(String[] elements) { 46 TestSet<String> inner = new TestSet<>(new HashSet<String>(), null); 47 Set<String> outer = Synchronized.set(inner, null); 48 inner.mutex = outer; 49 Collections.addAll(outer, elements); 50 return outer; 51 } 52 }) 53 .named("Synchronized.set") 54 .withFeatures( 55 CollectionFeature.GENERAL_PURPOSE, 56 CollectionFeature.ALLOWS_NULL_VALUES, 57 CollectionSize.ANY, 58 CollectionFeature.SERIALIZABLE) 59 .createTestSuite(); 60 } 61 62 static class TestSet<E> extends ForwardingSet<E> implements Serializable { 63 final Set<E> delegate; 64 public Object mutex; 65 66 public TestSet(Set<E> delegate, Object mutex) { 67 this.delegate = delegate; 68 this.mutex = mutex; 69 } 70 71 @Override 72 protected Set<E> delegate() { 73 return delegate; 74 } 75 76 @Override 77 public String toString() { 78 assertTrue(Thread.holdsLock(mutex)); 79 return super.toString(); 80 } 81 82 @Override 83 public boolean equals(@Nullable Object o) { 84 assertTrue(Thread.holdsLock(mutex)); 85 return super.equals(o); 86 } 87 88 @Override 89 public int hashCode() { 90 assertTrue(Thread.holdsLock(mutex)); 91 return super.hashCode(); 92 } 93 94 @Override 95 public boolean add(@Nullable E o) { 96 assertTrue(Thread.holdsLock(mutex)); 97 return super.add(o); 98 } 99 100 @Override 101 public boolean addAll(Collection<? extends E> c) { 102 assertTrue(Thread.holdsLock(mutex)); 103 return super.addAll(c); 104 } 105 106 @Override 107 public void clear() { 108 assertTrue(Thread.holdsLock(mutex)); 109 super.clear(); 110 } 111 112 @Override 113 public boolean contains(@Nullable Object o) { 114 assertTrue(Thread.holdsLock(mutex)); 115 return super.contains(o); 116 } 117 118 @Override 119 public boolean containsAll(Collection<?> c) { 120 assertTrue(Thread.holdsLock(mutex)); 121 return super.containsAll(c); 122 } 123 124 @Override 125 public boolean isEmpty() { 126 assertTrue(Thread.holdsLock(mutex)); 127 return super.isEmpty(); 128 } 129 130 /* Don't test iterator(); it may or may not hold the mutex. */ 131 132 @Override 133 public boolean remove(@Nullable Object o) { 134 assertTrue(Thread.holdsLock(mutex)); 135 return super.remove(o); 136 } 137 138 @Override 139 public boolean removeAll(Collection<?> c) { 140 assertTrue(Thread.holdsLock(mutex)); 141 return super.removeAll(c); 142 } 143 144 @Override 145 public boolean retainAll(Collection<?> c) { 146 assertTrue(Thread.holdsLock(mutex)); 147 return super.retainAll(c); 148 } 149 150 @Override 151 public int size() { 152 assertTrue(Thread.holdsLock(mutex)); 153 return super.size(); 154 } 155 156 @Override 157 public Object[] toArray() { 158 assertTrue(Thread.holdsLock(mutex)); 159 return super.toArray(); 160 } 161 162 @Override 163 public <T> T[] toArray(T[] a) { 164 assertTrue(Thread.holdsLock(mutex)); 165 return super.toArray(a); 166 } 167 168 private static final long serialVersionUID = 0; 169 } 170 } 171