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 import org.checkerframework.checker.nullness.qual.Nullable; 35 36 /** 37 * Tests for {@code ForwardingSet}. 38 * 39 * @author Robert Konigsberg 40 * @author Louis Wasserman 41 */ 42 public class ForwardingSetTest extends TestCase { 43 static class StandardImplForwardingSet<T> extends ForwardingSet<T> { 44 private final Set<T> backingSet; 45 StandardImplForwardingSet(Set<T> backingSet)46 StandardImplForwardingSet(Set<T> backingSet) { 47 this.backingSet = backingSet; 48 } 49 50 @Override delegate()51 protected Set<T> delegate() { 52 return backingSet; 53 } 54 55 @Override equals(@ullable Object object)56 public boolean equals(@Nullable Object object) { 57 return standardEquals(object); 58 } 59 60 @Override hashCode()61 public int hashCode() { 62 return standardHashCode(); 63 } 64 65 @Override addAll(Collection<? extends T> collection)66 public boolean addAll(Collection<? extends T> collection) { 67 return standardAddAll(collection); 68 } 69 70 @Override clear()71 public void clear() { 72 standardClear(); 73 } 74 75 @Override contains(Object object)76 public boolean contains(Object object) { 77 return standardContains(object); 78 } 79 80 @Override containsAll(Collection<?> collection)81 public boolean containsAll(Collection<?> collection) { 82 return standardContainsAll(collection); 83 } 84 85 @Override remove(Object object)86 public boolean remove(Object object) { 87 return standardRemove(object); 88 } 89 90 @Override removeAll(Collection<?> collection)91 public boolean removeAll(Collection<?> collection) { 92 return standardRemoveAll(collection); 93 } 94 95 @Override retainAll(Collection<?> collection)96 public boolean retainAll(Collection<?> collection) { 97 return standardRetainAll(collection); 98 } 99 100 @Override toArray()101 public Object[] toArray() { 102 return standardToArray(); 103 } 104 105 @Override toArray(T[] array)106 public <T> T[] toArray(T[] array) { 107 return standardToArray(array); 108 } 109 110 @Override toString()111 public String toString() { 112 return standardToString(); 113 } 114 } 115 suite()116 public static Test suite() { 117 TestSuite suite = new TestSuite(); 118 119 suite.addTestSuite(ForwardingSetTest.class); 120 suite.addTest( 121 SetTestSuiteBuilder.using( 122 new TestStringSetGenerator() { 123 @Override 124 protected Set<String> create(String[] elements) { 125 return new StandardImplForwardingSet<>(Sets.newLinkedHashSet(asList(elements))); 126 } 127 }) 128 .named("ForwardingSet[LinkedHashSet] with standard implementations") 129 .withFeatures( 130 CollectionSize.ANY, 131 CollectionFeature.ALLOWS_NULL_VALUES, 132 CollectionFeature.GENERAL_PURPOSE) 133 .createTestSuite()); 134 suite.addTest( 135 SetTestSuiteBuilder.using( 136 new TestStringSetGenerator() { 137 @Override 138 protected Set<String> create(String[] elements) { 139 return new StandardImplForwardingSet<>(MinimalSet.of(elements)); 140 } 141 }) 142 .named("ForwardingSet[MinimalSet] with standard implementations") 143 .withFeatures(CollectionSize.ANY, CollectionFeature.ALLOWS_NULL_VALUES) 144 .createTestSuite()); 145 146 return suite; 147 } 148 149 @SuppressWarnings({"rawtypes", "unchecked"}) testForwarding()150 public void testForwarding() { 151 new ForwardingWrapperTester() 152 .testForwarding( 153 Set.class, 154 new Function<Set, Set>() { 155 @Override 156 public Set apply(Set delegate) { 157 return wrap(delegate); 158 } 159 }); 160 } 161 testEquals()162 public void testEquals() { 163 Set<String> set1 = ImmutableSet.of("one"); 164 Set<String> set2 = ImmutableSet.of("two"); 165 new EqualsTester() 166 .addEqualityGroup(set1, wrap(set1), wrap(set1)) 167 .addEqualityGroup(set2, wrap(set2)) 168 .testEquals(); 169 } 170 wrap(final Set<T> delegate)171 private static <T> Set<T> wrap(final Set<T> delegate) { 172 return new ForwardingSet<T>() { 173 @Override 174 protected Set<T> delegate() { 175 return delegate; 176 } 177 }; 178 } 179 } 180