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.ALLOWS_NULL_VALUES;
18 import static com.google.common.collect.testing.features.CollectionSize.ZERO;
19 
20 import com.google.common.annotations.GwtCompatible;
21 import com.google.common.collect.testing.features.CollectionFeature;
22 import com.google.common.collect.testing.features.CollectionSize;
23 import com.google.common.testing.EqualsTester;
24 
25 /**
26  * Tests for {@code Multiset.equals} and {@code Multiset.hashCode}.
27  *
28  * @author Louis Wasserman
29  */
30 @GwtCompatible
31 public class MultisetEqualsTester<E> extends AbstractMultisetTester<E> {
testEqualsSameContents()32   public void testEqualsSameContents() {
33     new EqualsTester()
34         .addEqualityGroup(
35             getMultiset(),
36             getSubjectGenerator().create(getSampleElements().toArray()))
37         .testEquals();
38   }
39 
40   @CollectionSize.Require(absent = ZERO)
testNotEqualsEmpty()41   public void testNotEqualsEmpty() {
42     new EqualsTester()
43         .addEqualityGroup(getMultiset())
44         .addEqualityGroup(getSubjectGenerator().create())
45         .testEquals();
46   }
47 
testHashCodeMatchesEntrySet()48   public void testHashCodeMatchesEntrySet() {
49     assertEquals(getMultiset().entrySet().hashCode(), getMultiset().hashCode());
50   }
51 
52   @CollectionSize.Require(absent = ZERO)
53   @CollectionFeature.Require(ALLOWS_NULL_VALUES)
testEqualsMultisetWithNullValue()54   public void testEqualsMultisetWithNullValue() {
55     new EqualsTester()
56         .addEqualityGroup(getMultiset())
57         .addEqualityGroup(
58             getSubjectGenerator().create(createArrayWithNullElement()),
59             getSubjectGenerator().create(createArrayWithNullElement()))
60         .testEquals();
61   }
62 }
63