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.testing.testers; 18 19 import static com.google.common.collect.testing.features.CollectionFeature.ALLOWS_NULL_VALUES; 20 21 import com.google.common.annotations.GwtCompatible; 22 import com.google.common.collect.testing.Helpers; 23 import com.google.common.collect.testing.MinimalSet; 24 import com.google.common.collect.testing.features.CollectionFeature; 25 import com.google.common.collect.testing.features.CollectionSize; 26 import java.util.Collection; 27 import java.util.Set; 28 import org.junit.Ignore; 29 30 /** 31 * Tests {@link java.util.Set#equals}. 32 * 33 * @author George van den Driessche 34 */ 35 @GwtCompatible 36 @Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests. 37 public class SetEqualsTester<E> extends AbstractSetTester<E> { testEquals_otherSetWithSameElements()38 public void testEquals_otherSetWithSameElements() { 39 assertTrue( 40 "A Set should equal any other Set containing the same elements.", 41 getSet().equals(MinimalSet.from(getSampleElements()))); 42 } 43 44 @CollectionSize.Require(absent = CollectionSize.ZERO) testEquals_otherSetWithDifferentElements()45 public void testEquals_otherSetWithDifferentElements() { 46 Collection<E> elements = getSampleElements(getNumElements() - 1); 47 elements.add(getSubjectGenerator().samples().e3()); 48 49 assertFalse( 50 "A Set should not equal another Set containing different elements.", 51 getSet().equals(MinimalSet.from(elements))); 52 } 53 54 @CollectionSize.Require(absent = CollectionSize.ZERO) 55 @CollectionFeature.Require(ALLOWS_NULL_VALUES) testEquals_containingNull()56 public void testEquals_containingNull() { 57 Collection<E> elements = getSampleElements(getNumElements() - 1); 58 elements.add(null); 59 60 collection = getSubjectGenerator().create(elements.toArray()); 61 assertTrue( 62 "A Set should equal any other Set containing the same elements," 63 + " even if some elements are null.", 64 getSet().equals(MinimalSet.from(elements))); 65 } 66 67 @CollectionSize.Require(absent = CollectionSize.ZERO) testEquals_otherContainsNull()68 public void testEquals_otherContainsNull() { 69 Collection<E> elements = getSampleElements(getNumElements() - 1); 70 elements.add(null); 71 Set<E> other = MinimalSet.from(elements); 72 73 assertFalse( 74 "Two Sets should not be equal if exactly one of them contains null.", 75 getSet().equals(other)); 76 } 77 78 @CollectionSize.Require(absent = CollectionSize.ZERO) testEquals_smallerSet()79 public void testEquals_smallerSet() { 80 Collection<E> fewerElements = getSampleElements(getNumElements() - 1); 81 assertFalse( 82 "Sets of different sizes should not be equal.", 83 getSet().equals(MinimalSet.from(fewerElements))); 84 } 85 testEquals_largerSet()86 public void testEquals_largerSet() { 87 Collection<E> moreElements = getSampleElements(getNumElements() + 1); 88 assertFalse( 89 "Sets of different sizes should not be equal.", 90 getSet().equals(MinimalSet.from(moreElements))); 91 } 92 testEquals_list()93 public void testEquals_list() { 94 assertFalse("A List should never equal a Set.", getSet().equals(Helpers.copyToList(getSet()))); 95 } 96 } 97