1 /* 2 * Copyright (C) 2013 The Guava Authors 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except 5 * in compliance with the License. You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software distributed under the License 10 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express 11 * or implied. See the License for the specific language governing permissions and limitations under 12 * the License. 13 */ 14 15 package com.google.common.collect.testing.google; 16 17 import static com.google.common.collect.testing.features.CollectionFeature.SUPPORTS_ITERATOR_REMOVE; 18 import static com.google.common.collect.testing.features.CollectionSize.ONE; 19 import static com.google.common.collect.testing.features.CollectionSize.ZERO; 20 import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_KEYS; 21 import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_KEY_QUERIES; 22 import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_VALUES; 23 import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_VALUE_QUERIES; 24 import static com.google.common.collect.testing.features.MapFeature.SUPPORTS_REMOVE; 25 import static com.google.common.truth.Truth.assertThat; 26 27 import com.google.common.annotations.GwtCompatible; 28 import com.google.common.collect.Multimap; 29 import com.google.common.collect.testing.Helpers; 30 import com.google.common.collect.testing.features.CollectionFeature; 31 import com.google.common.collect.testing.features.CollectionSize; 32 import com.google.common.collect.testing.features.MapFeature; 33 34 import java.util.Collections; 35 import java.util.Iterator; 36 import java.util.Map.Entry; 37 38 /** 39 * Tester for {@code Multimap.entries}. 40 * 41 * @author Louis Wasserman 42 */ 43 @GwtCompatible 44 public class MultimapEntriesTester<K, V> extends AbstractMultimapTester<K, V, Multimap<K, V>> { 45 public void testEntries() { 46 assertThat(multimap().entries()).has().exactlyAs(getSampleElements()); 47 } 48 49 @CollectionSize.Require(absent = ZERO) 50 @MapFeature.Require(ALLOWS_NULL_KEYS) 51 public void testContainsEntryWithNullKeyPresent() { 52 initMultimapWithNullKey(); 53 assertThat(multimap().entries()).has().allOf( 54 Helpers.mapEntry((K) null, getValueForNullKey())); 55 } 56 57 @MapFeature.Require(ALLOWS_NULL_KEY_QUERIES) 58 public void testContainsEntryWithNullKeyAbsent() { 59 assertFalse(multimap().entries().contains(Helpers.mapEntry(null, sampleValues().e0))); 60 } 61 62 @CollectionSize.Require(absent = ZERO) 63 @MapFeature.Require(ALLOWS_NULL_VALUES) 64 public void testContainsEntryWithNullValuePresent() { 65 initMultimapWithNullValue(); 66 assertThat(multimap().entries()).has().allOf( 67 Helpers.mapEntry(getKeyForNullValue(), (V) null)); 68 } 69 70 @MapFeature.Require(ALLOWS_NULL_VALUE_QUERIES) 71 public void testContainsEntryWithNullValueAbsent() { 72 assertFalse(multimap().entries().contains( 73 Helpers.mapEntry(sampleKeys().e0, null))); 74 } 75 76 @CollectionSize.Require(absent = ZERO) 77 @MapFeature.Require(SUPPORTS_REMOVE) 78 public void testRemovePropagatesToMultimap() { 79 assertTrue(multimap().entries().remove( 80 Helpers.mapEntry(sampleKeys().e0, sampleValues().e0))); 81 expectMissing(Helpers.mapEntry(sampleKeys().e0, sampleValues().e0)); 82 assertEquals(getNumElements() - 1, multimap().size()); 83 assertFalse(multimap().containsEntry(sampleKeys().e0, sampleValues().e0)); 84 } 85 86 @CollectionSize.Require(absent = ZERO) 87 @MapFeature.Require(SUPPORTS_REMOVE) 88 public void testRemoveAllPropagatesToMultimap() { 89 assertTrue(multimap().entries().removeAll( 90 Collections.singleton(Helpers.mapEntry(sampleKeys().e0, sampleValues().e0)))); 91 expectMissing(Helpers.mapEntry(sampleKeys().e0, sampleValues().e0)); 92 assertEquals(getNumElements() - 1, multimap().size()); 93 assertFalse(multimap().containsEntry(sampleKeys().e0, sampleValues().e0)); 94 } 95 96 @CollectionSize.Require(absent = ZERO) 97 @MapFeature.Require(SUPPORTS_REMOVE) 98 public void testRetainAllPropagatesToMultimap() { 99 multimap().entries().retainAll( 100 Collections.singleton(Helpers.mapEntry(sampleKeys().e0, sampleValues().e0))); 101 assertEquals( 102 getSubjectGenerator().create(Helpers.mapEntry(sampleKeys().e0, sampleValues().e0)), 103 multimap()); 104 assertEquals(1, multimap().size()); 105 assertTrue(multimap().containsEntry(sampleKeys().e0, sampleValues().e0)); 106 } 107 108 @CollectionSize.Require(ONE) 109 @CollectionFeature.Require(SUPPORTS_ITERATOR_REMOVE) 110 public void testIteratorRemovePropagatesToMultimap() { 111 Iterator<Entry<K, V>> iterator = multimap().entries().iterator(); 112 assertEquals( 113 Helpers.mapEntry(sampleKeys().e0, sampleValues().e0), 114 iterator.next()); 115 iterator.remove(); 116 assertTrue(multimap().isEmpty()); 117 } 118 119 @CollectionSize.Require(absent = ZERO) 120 @MapFeature.Require(SUPPORTS_REMOVE) 121 public void testEntriesRemainValidAfterRemove() { 122 Iterator<Entry<K, V>> iterator = multimap().entries().iterator(); 123 Entry<K, V> entry = iterator.next(); 124 K key = entry.getKey(); 125 V value = entry.getValue(); 126 multimap().removeAll(key); 127 assertEquals(key, entry.getKey()); 128 assertEquals(value, entry.getValue()); 129 } 130 } 131 132
