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 java.util.Arrays.asList; 20 21 import com.google.common.base.Function; 22 import com.google.common.collect.testing.MinimalSet; 23 import com.google.common.collect.testing.SetTestSuiteBuilder; 24 import com.google.common.collect.testing.TestStringSetGenerator; 25 import com.google.common.collect.testing.features.CollectionFeature; 26 import com.google.common.collect.testing.features.CollectionSize; 27 import com.google.common.testing.EqualsTester; 28 import com.google.common.testing.ForwardingWrapperTester; 29 import java.util.Collection; 30 import java.util.Set; 31 import junit.framework.Test; 32 import junit.framework.TestCase; 33 import junit.framework.TestSuite; 34 35 /** 36 * Tests for {@code ForwardingSet}. 37 * 38 * @author Robert Konigsberg 39 * @author Louis Wasserman 40 */ 41 public class ForwardingSetTest extends TestCase { 42 static class StandardImplForwardingSet<T> extends ForwardingSet<T> { 43 private final Set<T> backingSet; 44 StandardImplForwardingSet(Set<T> backingSet)45 StandardImplForwardingSet(Set<T> backingSet) { 46 this.backingSet = backingSet; 47 } 48 49 @Override delegate()50 protected Set<T> delegate() { 51 return backingSet; 52 } 53 54 @Override equals(Object object)55 public boolean equals(Object object) { 56 return standardEquals(object); 57 } 58 59 @Override hashCode()60 public int hashCode() { 61 return standardHashCode(); 62 } 63 64 @Override addAll(Collection<? extends T> collection)65 public boolean addAll(Collection<? extends T> collection) { 66 return standardAddAll(collection); 67 } 68 69 @Override clear()70 public void clear() { 71 standardClear(); 72 } 73 74 @Override contains(Object object)75 public boolean contains(Object object) { 76 return standardContains(object); 77 } 78 79 @Override containsAll(Collection<?> collection)80 public boolean containsAll(Collection<?> collection) { 81 return standardContainsAll(collection); 82 } 83 84 @Override remove(Object object)85 public boolean remove(Object object) { 86 return standardRemove(object); 87 } 88 89 @Override removeAll(Collection<?> collection)90 public boolean removeAll(Collection<?> collection) { 91 return standardRemoveAll(collection); 92 } 93 94 @Override retainAll(Collection<?> collection)95 public boolean retainAll(Collection<?> collection) { 96 return standardRetainAll(collection); 97 } 98 99 @Override toArray()100 public Object[] toArray() { 101 return standardToArray(); 102 } 103 104 @Override toArray(T[] array)105 public <T> T[] toArray(T[] array) { 106 return standardToArray(array); 107 } 108 109 @Override toString()110 public String toString() { 111 return standardToString(); 112 } 113 } 114 suite()115 public static Test suite() { 116 TestSuite suite = new TestSuite(); 117 118 suite.addTestSuite(ForwardingSetTest.class); 119 suite.addTest( 120 SetTestSuiteBuilder.using( 121 new TestStringSetGenerator() { 122 @Override 123 protected Set<String> create(String[] elements) { 124 return new StandardImplForwardingSet<>(Sets.newLinkedHashSet(asList(elements))); 125 } 126 }) 127 .named("ForwardingSet[LinkedHashSet] with standard implementations") 128 .withFeatures( 129 CollectionSize.ANY, 130 CollectionFeature.ALLOWS_NULL_VALUES, 131 CollectionFeature.GENERAL_PURPOSE) 132 .createTestSuite()); 133 suite.addTest( 134 SetTestSuiteBuilder.using( 135 new TestStringSetGenerator() { 136 @Override 137 protected Set<String> create(String[] elements) { 138 return new StandardImplForwardingSet<>(MinimalSet.of(elements)); 139 } 140 }) 141 .named("ForwardingSet[MinimalSet] with standard implementations") 142 .withFeatures(CollectionSize.ANY, CollectionFeature.ALLOWS_NULL_VALUES) 143 .createTestSuite()); 144 145 return suite; 146 } 147 148 @SuppressWarnings({"rawtypes", "unchecked"}) testForwarding()149 public void testForwarding() { 150 new ForwardingWrapperTester() 151 .testForwarding( 152 Set.class, 153 new Function<Set, Set>() { 154 @Override 155 public Set apply(Set delegate) { 156 return wrap(delegate); 157 } 158 }); 159 } 160 testEquals()161 public void testEquals() { 162 Set<String> set1 = ImmutableSet.of("one"); 163 Set<String> set2 = ImmutableSet.of("two"); 164 new EqualsTester() 165 .addEqualityGroup(set1, wrap(set1), wrap(set1)) 166 .addEqualityGroup(set2, wrap(set2)) 167 .testEquals(); 168 } 169 wrap(final Set<T> delegate)170 private static <T> Set<T> wrap(final Set<T> delegate) { 171 return new ForwardingSet<T>() { 172 @Override 173 protected Set<T> delegate() { 174 return delegate; 175 } 176 }; 177 } 178 } 179