001/*
002 * Copyright (C) 2013 The Guava Authors
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package com.google.common.collect.testing.google;
018
019import static com.google.common.collect.testing.Helpers.assertContentsAnyOrder;
020import static com.google.common.collect.testing.Helpers.assertEmpty;
021import static com.google.common.collect.testing.Helpers.mapEntry;
022import static com.google.common.collect.testing.features.CollectionSize.SEVERAL;
023import static com.google.common.collect.testing.features.CollectionSize.ZERO;
024import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_VALUES;
025import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_VALUE_QUERIES;
026import static com.google.common.collect.testing.features.MapFeature.SUPPORTS_PUT;
027import static com.google.common.collect.testing.features.MapFeature.SUPPORTS_REMOVE;
028import static org.junit.Assert.assertThrows;
029
030import com.google.common.annotations.GwtCompatible;
031import com.google.common.collect.Multimap;
032import com.google.common.collect.testing.features.CollectionSize;
033import com.google.common.collect.testing.features.MapFeature;
034import java.util.Collection;
035
036/**
037 * Tests for {@code Multimap.asMap().get(Object)}.
038 *
039 * @author Louis Wasserman
040 */
041@GwtCompatible
042public class MultimapAsMapGetTester<K, V> extends AbstractMultimapTester<K, V, Multimap<K, V>> {
043
044  @CollectionSize.Require(SEVERAL)
045  @MapFeature.Require(SUPPORTS_REMOVE)
046  public void testPropagatesRemoveToMultimap() {
047    resetContainer(mapEntry(k0(), v0()), mapEntry(k0(), v3()), mapEntry(k0(), v2()));
048    Collection<V> result = multimap().asMap().get(k0());
049    assertTrue(result.remove(v0()));
050    assertFalse(multimap().containsEntry(k0(), v0()));
051    assertEquals(2, multimap().size());
052  }
053
054  @CollectionSize.Require(absent = ZERO)
055  @MapFeature.Require(SUPPORTS_REMOVE)
056  public void testPropagatesRemoveLastElementToMultimap() {
057    Collection<V> result = multimap().asMap().get(k0());
058    assertTrue(result.remove(v0()));
059    assertGet(k0());
060  }
061
062  @CollectionSize.Require(absent = ZERO)
063  @MapFeature.Require(SUPPORTS_REMOVE)
064  public void testPropagatesClearToMultimap() {
065    Collection<V> result = multimap().asMap().get(k0());
066    result.clear();
067    assertGet(k0());
068    assertEmpty(result);
069  }
070
071  @CollectionSize.Require(absent = ZERO)
072  @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_VALUES})
073  public void testAddNullValue() {
074    Collection<V> result = multimap().asMap().get(k0());
075    assertTrue(result.add(null));
076    assertTrue(multimap().containsEntry(k0(), null));
077  }
078
079  @CollectionSize.Require(absent = ZERO)
080  @MapFeature.Require({SUPPORTS_REMOVE, ALLOWS_NULL_VALUE_QUERIES})
081  public void testRemoveNullValue() {
082    Collection<V> result = multimap().asMap().get(k0());
083    assertFalse(result.remove(null));
084  }
085
086  @CollectionSize.Require(absent = ZERO)
087  @MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_VALUES)
088  public void testAddNullValueUnsupported() {
089    Collection<V> result = multimap().asMap().get(k0());
090    assertThrows(NullPointerException.class, () -> result.add(null));
091  }
092
093  @CollectionSize.Require(absent = ZERO)
094  @MapFeature.Require(SUPPORTS_PUT)
095  public void testPropagatesAddToMultimap() {
096    Collection<V> result = multimap().asMap().get(k0());
097    result.add(v3());
098    assertContentsAnyOrder(multimap().get(k0()), v0(), v3());
099  }
100
101  @CollectionSize.Require(absent = ZERO)
102  @MapFeature.Require({SUPPORTS_REMOVE, SUPPORTS_PUT})
103  public void testPropagatesRemoveThenAddToMultimap() {
104    int oldSize = getNumElements();
105
106    Collection<V> result = multimap().asMap().get(k0());
107    assertTrue(result.remove(v0()));
108
109    assertFalse(multimap().containsKey(k0()));
110    assertFalse(multimap().containsEntry(k0(), v0()));
111    assertEmpty(result);
112
113    assertTrue(result.add(v1()));
114    assertTrue(result.add(v2()));
115
116    assertContentsAnyOrder(result, v1(), v2());
117    assertContentsAnyOrder(multimap().get(k0()), v1(), v2());
118    assertTrue(multimap().containsKey(k0()));
119    assertFalse(multimap().containsEntry(k0(), v0()));
120    assertTrue(multimap().containsEntry(k0(), v2()));
121    assertEquals(oldSize + 1, multimap().size());
122  }
123
124  @CollectionSize.Require(absent = ZERO)
125  @MapFeature.Require(SUPPORTS_REMOVE)
126  public void testReflectsMultimapRemove() {
127    Collection<V> result = multimap().asMap().get(k0());
128    multimap().removeAll(k0());
129    assertEmpty(result);
130  }
131}