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.features.CollectionSize.SEVERAL;
022import static com.google.common.collect.testing.features.CollectionSize.ZERO;
023import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_VALUES;
024import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_VALUE_QUERIES;
025import static com.google.common.collect.testing.features.MapFeature.SUPPORTS_PUT;
026import static com.google.common.collect.testing.features.MapFeature.SUPPORTS_REMOVE;
027
028import com.google.common.annotations.GwtCompatible;
029import com.google.common.collect.Multimap;
030import com.google.common.collect.testing.Helpers;
031import com.google.common.collect.testing.features.CollectionSize;
032import com.google.common.collect.testing.features.MapFeature;
033import java.util.Collection;
034import org.junit.Ignore;
035
036/**
037 * Tests for {@code Multimap.asMap().get(Object)}.
038 *
039 * @author Louis Wasserman
040 */
041@GwtCompatible
042@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
043@SuppressWarnings("JUnit4ClassUsedInJUnit3")
044public class MultimapAsMapGetTester<K, V> extends AbstractMultimapTester<K, V, Multimap<K, V>> {
045
046  @CollectionSize.Require(SEVERAL)
047  @MapFeature.Require(SUPPORTS_REMOVE)
048  public void testPropagatesRemoveToMultimap() {
049    resetContainer(
050        Helpers.mapEntry(k0(), v0()), Helpers.mapEntry(k0(), v3()), Helpers.mapEntry(k0(), v2()));
051    Collection<V> result = multimap().asMap().get(k0());
052    assertTrue(result.remove(v0()));
053    assertFalse(multimap().containsEntry(k0(), v0()));
054    assertEquals(2, multimap().size());
055  }
056
057  @CollectionSize.Require(absent = ZERO)
058  @MapFeature.Require(SUPPORTS_REMOVE)
059  public void testPropagatesRemoveLastElementToMultimap() {
060    Collection<V> result = multimap().asMap().get(k0());
061    assertTrue(result.remove(v0()));
062    assertGet(k0());
063  }
064
065  @CollectionSize.Require(absent = ZERO)
066  @MapFeature.Require(SUPPORTS_REMOVE)
067  public void testPropagatesClearToMultimap() {
068    Collection<V> result = multimap().asMap().get(k0());
069    result.clear();
070    assertGet(k0());
071    assertEmpty(result);
072  }
073
074  @CollectionSize.Require(absent = ZERO)
075  @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_VALUES})
076  public void testAddNullValue() {
077    Collection<V> result = multimap().asMap().get(k0());
078    assertTrue(result.add(null));
079    assertTrue(multimap().containsEntry(k0(), null));
080  }
081
082  @CollectionSize.Require(absent = ZERO)
083  @MapFeature.Require({SUPPORTS_REMOVE, ALLOWS_NULL_VALUE_QUERIES})
084  public void testRemoveNullValue() {
085    Collection<V> result = multimap().asMap().get(k0());
086    assertFalse(result.remove(null));
087  }
088
089  @CollectionSize.Require(absent = ZERO)
090  @MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_VALUES)
091  public void testAddNullValueUnsupported() {
092    Collection<V> result = multimap().asMap().get(k0());
093    try {
094      result.add(null);
095      fail("Expected NullPointerException");
096    } catch (NullPointerException expected) {
097    }
098  }
099
100  @CollectionSize.Require(absent = ZERO)
101  @MapFeature.Require(SUPPORTS_PUT)
102  public void testPropagatesAddToMultimap() {
103    Collection<V> result = multimap().asMap().get(k0());
104    result.add(v3());
105    assertContentsAnyOrder(multimap().get(k0()), v0(), v3());
106  }
107
108  @CollectionSize.Require(absent = ZERO)
109  @MapFeature.Require({SUPPORTS_REMOVE, SUPPORTS_PUT})
110  public void testPropagatesRemoveThenAddToMultimap() {
111    int oldSize = getNumElements();
112
113    Collection<V> result = multimap().asMap().get(k0());
114    assertTrue(result.remove(v0()));
115
116    assertFalse(multimap().containsKey(k0()));
117    assertFalse(multimap().containsEntry(k0(), v0()));
118    assertEmpty(result);
119
120    assertTrue(result.add(v1()));
121    assertTrue(result.add(v2()));
122
123    assertContentsAnyOrder(result, v1(), v2());
124    assertContentsAnyOrder(multimap().get(k0()), v1(), v2());
125    assertTrue(multimap().containsKey(k0()));
126    assertFalse(multimap().containsEntry(k0(), v0()));
127    assertTrue(multimap().containsEntry(k0(), v2()));
128    assertEquals(oldSize + 1, multimap().size());
129  }
130
131  @CollectionSize.Require(absent = ZERO)
132  @MapFeature.Require(SUPPORTS_REMOVE)
133  public void testReflectsMultimapRemove() {
134    Collection<V> result = multimap().asMap().get(k0());
135    multimap().removeAll(k0());
136    assertEmpty(result);
137  }
138}