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_QUERIES; 20 import static com.google.common.collect.testing.features.CollectionFeature.ALLOWS_NULL_VALUES; 21 import static com.google.common.collect.testing.features.CollectionFeature.SUPPORTS_REMOVE_ALL; 22 import static com.google.common.collect.testing.features.CollectionSize.ZERO; 23 24 import com.google.common.collect.testing.AbstractCollectionTester; 25 import com.google.common.collect.testing.MinimalCollection; 26 import com.google.common.collect.testing.WrongType; 27 import com.google.common.collect.testing.features.CollectionFeature; 28 import com.google.common.collect.testing.features.CollectionSize; 29 30 import java.util.Collections; 31 32 /** 33 * A generic JUnit test which tests {@code removeAll} operations on a 34 * collection. Can't be invoked directly; please see 35 * {@link com.google.common.collect.testing.CollectionTestSuiteBuilder}. 36 * 37 * <p>This class is GWT compatible. 38 * 39 * @author George van den Driessche 40 * @author Chris Povirk 41 */ 42 @SuppressWarnings("unchecked") // too many "unchecked generic array creations" 43 public class CollectionRemoveAllTester<E> extends AbstractCollectionTester<E> { 44 @CollectionFeature.Require(SUPPORTS_REMOVE_ALL) testRemoveAll_emptyCollection()45 public void testRemoveAll_emptyCollection() { 46 assertFalse("removeAll(emptyCollection) should return false", 47 collection.removeAll(MinimalCollection.of())); 48 expectUnchanged(); 49 } 50 51 @CollectionFeature.Require(SUPPORTS_REMOVE_ALL) testRemoveAll_nonePresent()52 public void testRemoveAll_nonePresent() { 53 assertFalse("removeAll(disjointCollection) should return false", 54 collection.removeAll(MinimalCollection.of(samples.e3))); 55 expectUnchanged(); 56 } 57 58 @CollectionFeature.Require(SUPPORTS_REMOVE_ALL) 59 @CollectionSize.Require(absent = ZERO) testRemoveAll_allPresent()60 public void testRemoveAll_allPresent() { 61 assertTrue("removeAll(intersectingCollection) should return true", 62 collection.removeAll(MinimalCollection.of(samples.e0))); 63 expectMissing(samples.e0); 64 } 65 66 @CollectionFeature.Require(SUPPORTS_REMOVE_ALL) 67 @CollectionSize.Require(absent = ZERO) testRemoveAll_somePresent()68 public void testRemoveAll_somePresent() { 69 assertTrue("removeAll(intersectingCollection) should return true", 70 collection.removeAll(MinimalCollection.of(samples.e0, samples.e3))); 71 expectMissing(samples.e0); 72 } 73 74 /** 75 * Trigger the other.size() >= this.size() case in AbstractSet.removeAll(). 76 */ 77 @CollectionFeature.Require(SUPPORTS_REMOVE_ALL) 78 @CollectionSize.Require(absent = ZERO) testRemoveAll_somePresentLargeCollectionToRemove()79 public void testRemoveAll_somePresentLargeCollectionToRemove() { 80 assertTrue("removeAll(largeIntersectingCollection) should return true", 81 collection.removeAll(MinimalCollection.of( 82 samples.e0, samples.e0, samples.e0, 83 samples.e3, samples.e3, samples.e3))); 84 expectMissing(samples.e0); 85 } 86 87 @CollectionFeature.Require(absent = SUPPORTS_REMOVE_ALL) testRemoveAll_unsupportedEmptyCollection()88 public void testRemoveAll_unsupportedEmptyCollection() { 89 try { 90 assertFalse("removeAll(emptyCollection) should return false or throw " 91 + "UnsupportedOperationException", 92 collection.removeAll(MinimalCollection.of())); 93 } catch (UnsupportedOperationException tolerated) { 94 } 95 expectUnchanged(); 96 } 97 98 @CollectionFeature.Require(absent = SUPPORTS_REMOVE_ALL) testRemoveAll_unsupportedNonePresent()99 public void testRemoveAll_unsupportedNonePresent() { 100 try { 101 assertFalse("removeAll(disjointCollection) should return false or throw " 102 + "UnsupportedOperationException", 103 collection.removeAll(MinimalCollection.of(samples.e3))); 104 } catch (UnsupportedOperationException tolerated) { 105 } 106 expectUnchanged(); 107 } 108 109 @CollectionFeature.Require(absent = SUPPORTS_REMOVE_ALL) 110 @CollectionSize.Require(absent = ZERO) testRemoveAll_unsupportedPresent()111 public void testRemoveAll_unsupportedPresent() { 112 try { 113 collection.removeAll(MinimalCollection.of(samples.e0)); 114 fail("removeAll(intersectingCollection) should throw " 115 + "UnsupportedOperationException"); 116 } catch (UnsupportedOperationException expected) { 117 } 118 expectUnchanged(); 119 assertTrue(collection.contains(samples.e0)); 120 } 121 122 /* 123 * AbstractCollection fails the removeAll(null) test when the subject 124 * collection is empty, but we'd still like to test removeAll(null) when we 125 * can. We split the test into empty and non-empty cases. This allows us to 126 * suppress only the former. 127 */ 128 129 @CollectionFeature.Require(SUPPORTS_REMOVE_ALL) 130 @CollectionSize.Require(ZERO) testRemoveAll_nullCollectionReferenceEmptySubject()131 public void testRemoveAll_nullCollectionReferenceEmptySubject() { 132 try { 133 collection.removeAll(null); 134 // Returning successfully is not ideal, but tolerated. 135 } catch (NullPointerException expected) { 136 } 137 } 138 139 @CollectionFeature.Require(SUPPORTS_REMOVE_ALL) 140 @CollectionSize.Require(absent = ZERO) testRemoveAll_nullCollectionReferenceNonEmptySubject()141 public void testRemoveAll_nullCollectionReferenceNonEmptySubject() { 142 try { 143 collection.removeAll(null); 144 fail("removeAll(null) should throw NullPointerException"); 145 } catch (NullPointerException expected) { 146 } 147 } 148 149 @CollectionFeature.Require(value = SUPPORTS_REMOVE_ALL, 150 absent = ALLOWS_NULL_QUERIES) testRemoveAll_containsNullNo()151 public void testRemoveAll_containsNullNo() { 152 MinimalCollection<?> containsNull = MinimalCollection.of((Object) null); 153 try { 154 assertFalse("removeAll(containsNull) should return false or throw", 155 collection.removeAll(containsNull)); 156 } catch (NullPointerException tolerated) { 157 } 158 expectUnchanged(); 159 } 160 161 @CollectionFeature.Require({SUPPORTS_REMOVE_ALL, ALLOWS_NULL_QUERIES}) testRemoveAll_containsNullNoButAllowed()162 public void testRemoveAll_containsNullNoButAllowed() { 163 MinimalCollection<?> containsNull = MinimalCollection.of((Object) null); 164 assertFalse("removeAll(containsNull) should return false", 165 collection.removeAll(containsNull)); 166 expectUnchanged(); 167 } 168 169 @CollectionFeature.Require({SUPPORTS_REMOVE_ALL, ALLOWS_NULL_VALUES}) 170 @CollectionSize.Require(absent = ZERO) testRemoveAll_containsNullYes()171 public void testRemoveAll_containsNullYes() { 172 initCollectionWithNullElement(); 173 assertTrue("removeAll(containsNull) should return true", 174 collection.removeAll(Collections.singleton(null))); 175 // TODO: make this work with MinimalCollection 176 } 177 178 @CollectionFeature.Require(SUPPORTS_REMOVE_ALL) testRemoveAll_containsWrongType()179 public void testRemoveAll_containsWrongType() { 180 try { 181 assertFalse("removeAll(containsWrongType) should return false or throw", 182 collection.removeAll(MinimalCollection.of(WrongType.VALUE))); 183 } catch (ClassCastException tolerated) { 184 } 185 expectUnchanged(); 186 } 187 } 188