MultimapPutAllMultimapTester.java revision 3ecfa412eddc4b084663f38d562537b86b9734d5 
1/*
2 * Copyright (C) 2013 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
17package com.google.common.collect.testing.google;
18
19import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_KEYS;
20import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_VALUES;
21import static com.google.common.collect.testing.features.MapFeature.SUPPORTS_PUT;
22import static com.google.common.truth.Truth.assertThat;
23
24import com.google.common.annotations.GwtCompatible;
25import com.google.common.collect.Multimap;
26import com.google.common.collect.testing.Helpers;
27import com.google.common.collect.testing.features.MapFeature;
28
29import java.util.Collection;
30
31/**
32 * Tester for {@link Multimap#putAll(Multimap)}.
33 *
34 * @author Louis Wasserman
35 */
36@GwtCompatible
37public class MultimapPutAllMultimapTester<K, V>
38    extends AbstractMultimapTester<K, V, Multimap<K, V>> {
39  @MapFeature.Require(absent = SUPPORTS_PUT)
40  public void testPutUnsupported() {
41    try {
42      multimap().putAll(getSubjectGenerator().create(
43          Helpers.mapEntry(sampleKeys().e3, sampleValues().e3)));
44      fail("Expected UnsupportedOperationException");
45    } catch (UnsupportedOperationException expected) {}
46  }
47
48  @MapFeature.Require(SUPPORTS_PUT)
49  public void testPutAllIntoEmpty() {
50    Multimap<K, V> target = getSubjectGenerator().create();
51    assertEquals(!multimap().isEmpty(), target.putAll(multimap()));
52    assertEquals(multimap(), target);
53  }
54
55  @MapFeature.Require(SUPPORTS_PUT)
56  public void testPutAll() {
57    Multimap<K, V> source = getSubjectGenerator().create(
58        Helpers.mapEntry(sampleKeys().e0, sampleValues().e3),
59        Helpers.mapEntry(sampleKeys().e3, sampleValues().e3));
60    assertTrue(multimap().putAll(source));
61    assertTrue(multimap().containsEntry(sampleKeys().e0, sampleValues().e3));
62    assertTrue(multimap().containsEntry(sampleKeys().e3, sampleValues().e3));
63  }
64
65  @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_VALUES})
66  public void testPutAllWithNullValue() {
67    Multimap<K, V> source = getSubjectGenerator().create(
68        Helpers.mapEntry(sampleKeys().e0, null));
69    assertTrue(multimap().putAll(source));
70    assertTrue(multimap().containsEntry(sampleKeys().e0, null));
71  }
72
73  @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_KEYS})
74  public void testPutAllWithNullKey() {
75    Multimap<K, V> source = getSubjectGenerator().create(
76        Helpers.mapEntry(null, sampleValues().e0));
77    assertTrue(multimap().putAll(source));
78    assertTrue(multimap().containsEntry(null, sampleValues().e0));
79  }
80
81  @MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_VALUES)
82  public void testPutAllRejectsNullValue() {
83    Multimap<K, V> source = getSubjectGenerator().create(
84        Helpers.mapEntry(sampleKeys().e0, null));
85    try {
86      multimap().putAll(source);
87      fail("Expected NullPointerException");
88    } catch (NullPointerException expected) {}
89    expectUnchanged();
90  }
91
92  @MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_KEYS)
93  public void testPutAllRejectsNullKey() {
94    Multimap<K, V> source = getSubjectGenerator().create(
95        Helpers.mapEntry(null, sampleValues().e0));
96    try {
97      multimap().putAll(source);
98      fail("Expected NullPointerException");
99    } catch (NullPointerException expected) {}
100    expectUnchanged();
101  }
102
103  @MapFeature.Require(SUPPORTS_PUT)
104  public void testPutAllPropagatesToGet() {
105    Multimap<K, V> source = getSubjectGenerator().create(
106        Helpers.mapEntry(sampleKeys().e0, sampleValues().e3),
107        Helpers.mapEntry(sampleKeys().e3, sampleValues().e3));
108    Collection<V> getCollection = multimap().get(sampleKeys().e0);
109    int getCollectionSize = getCollection.size();
110    assertTrue(multimap().putAll(source));
111    assertEquals(getCollectionSize + 1, getCollection.size());
112    assertThat(getCollection).has().allOf(sampleValues().e3);
113  }
114}
115