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.MinimalSet; 23 import com.google.common.collect.testing.features.CollectionFeature; 24 import com.google.common.collect.testing.features.CollectionSize; 25 26 import java.util.ArrayList; 27 import java.util.Collection; 28 import java.util.List; 29 30 /** 31 * Tests {@link List#equals}. 32 * 33 * @author George van den Driessche 34 */ 35 @GwtCompatible 36 public class ListEqualsTester<E> extends AbstractListTester<E> { 37 public void testEquals_otherListWithSameElements() { 38 assertTrue( 39 "A List should equal any other List containing the same elements.", 40 getList().equals(new ArrayList<E>(getOrderedElements()))); 41 } 42 43 @CollectionSize.Require(absent = CollectionSize.ZERO) 44 public void testEquals_otherListWithDifferentElements() { 45 ArrayList<E> other = new ArrayList<E>(getSampleElements()); 46 other.set(other.size() / 2, getSubjectGenerator().samples().e3); 47 assertFalse( 48 "A List should not equal another List containing different elements.", 49 getList().equals(other)); 50 } 51 52 @CollectionSize.Require(absent = CollectionSize.ZERO) 53 public void testEquals_otherListContainingNull() { 54 List<E> other = new ArrayList<E>(getSampleElements()); 55 other.set(other.size() / 2, null); 56 assertFalse("Two Lists should not be equal if exactly one of them has " 57 + "null at a given index.", 58 getList().equals(other)); 59 } 60 61 @CollectionSize.Require(absent = CollectionSize.ZERO) 62 @CollectionFeature.Require(ALLOWS_NULL_VALUES) 63 public void testEquals_containingNull() { 64 ArrayList<E> elements = new ArrayList<E>(getSampleElements()); 65 elements.set(elements.size() / 2, null); 66 collection = getSubjectGenerator().create(elements.toArray()); 67 List<E> other = new ArrayList<E>(getSampleElements()); 68 assertFalse("Two Lists should not be equal if exactly one of them has " 69 + "null at a given index.", 70 getList().equals(other)); 71 } 72 73 @CollectionSize.Require(absent = CollectionSize.ZERO) 74 public void testEquals_shorterList() { 75 Collection<E> fewerElements = getSampleElements(getNumElements() - 1); 76 assertFalse("Lists of different sizes should not be equal.", 77 getList().equals(new ArrayList<E>(fewerElements))); 78 } 79 80 public void testEquals_longerList() { 81 Collection<E> moreElements = getSampleElements(getNumElements() + 1); 82 assertFalse("Lists of different sizes should not be equal.", 83 getList().equals(new ArrayList<E>(moreElements))); 84 } 85 86 public void testEquals_set() { 87 assertFalse("A List should never equal a Set.", 88 getList().equals(MinimalSet.from(getList()))); 89 } 90 } 91
