Coverage Summary for Class: MultimapEqualsTester (com.google.common.collect.testing.google)

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.CollectionSize.ZERO;
18 import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_KEYS;
19 import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_VALUES;
20 
21 import com.google.common.annotations.GwtCompatible;
22 import com.google.common.collect.Multimap;
23 import com.google.common.collect.testing.Helpers;
24 import com.google.common.collect.testing.features.CollectionSize;
25 import com.google.common.collect.testing.features.MapFeature;
26 import com.google.common.testing.EqualsTester;
27 import java.util.ArrayList;
28 import java.util.List;
29 import java.util.Map.Entry;
30 import org.junit.Ignore;
31 
32 /**
33  * Tester for {@code Multimap.equals}.
34  *
35  * @author Louis Wasserman
36  */
37 @GwtCompatible
38 @Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
39 public class MultimapEqualsTester<K, V> extends AbstractMultimapTester<K, V, Multimap<K, V>> {
40   public void testEqualsTrue() {
41     new EqualsTester()
42         .addEqualityGroup(multimap(), getSubjectGenerator().create(getSampleElements().toArray()))
43         .testEquals();
44   }
45 
46   public void testEqualsFalse() {
47     List<Entry<K, V>> targetEntries = new ArrayList<>(getSampleElements());
48     targetEntries.add(Helpers.mapEntry(k0(), v3()));
49     new EqualsTester()
50         .addEqualityGroup(multimap())
51         .addEqualityGroup(getSubjectGenerator().create(targetEntries.toArray()))
52         .testEquals();
53   }
54 
55   @CollectionSize.Require(absent = ZERO)
56   @MapFeature.Require(ALLOWS_NULL_KEYS)
57   public void testEqualsMultimapWithNullKey() {
58     Multimap<K, V> original = multimap();
59     initMultimapWithNullKey();
60     Multimap<K, V> withNull = multimap();
61     new EqualsTester()
62         .addEqualityGroup(original)
63         .addEqualityGroup(
64             withNull, getSubjectGenerator().create((Object[]) createArrayWithNullKey()))
65         .testEquals();
66   }
67 
68   @CollectionSize.Require(absent = ZERO)
69   @MapFeature.Require(ALLOWS_NULL_VALUES)
70   public void testEqualsMultimapWithNullValue() {
71     Multimap<K, V> original = multimap();
72     initMultimapWithNullValue();
73     Multimap<K, V> withNull = multimap();
74     new EqualsTester()
75         .addEqualityGroup(original)
76         .addEqualityGroup(
77             withNull, getSubjectGenerator().create((Object[]) createArrayWithNullValue()))
78         .testEquals();
79   }
80 
81   @CollectionSize.Require(absent = ZERO)
82   public void testNotEqualsEmpty() {
83     new EqualsTester()
84         .addEqualityGroup(multimap())
85         .addEqualityGroup(getSubjectGenerator().create())
86         .testEquals();
87   }
88 
89   public void testHashCodeMatchesAsMap() {
90     assertEquals(multimap().asMap().hashCode(), multimap().hashCode());
91   }
92 }