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 
17 package com.google.common.collect.testing.google;
18 
19 import static com.google.common.collect.testing.features.CollectionFeature.SUPPORTS_ADD;
20 
21 import com.google.common.annotations.GwtCompatible;
22 import com.google.common.collect.testing.features.CollectionFeature;
23 
24 import java.util.Arrays;
25 import java.util.Collections;
26 
27 /**
28  * Tests for {@code Multiset.add}.
29  *
30  * @author Jared Levy
31  */
32 @GwtCompatible
33 public class MultisetAddTester<E> extends AbstractMultisetTester<E> {
34   @CollectionFeature.Require(absent = SUPPORTS_ADD)
35   public void testAddUnsupported() {
36     try {
37       getMultiset().add(samples.e0);
38       fail("Expected UnsupportedOperationException");
39     } catch (UnsupportedOperationException expected) {}
40   }
41 
42   @CollectionFeature.Require(SUPPORTS_ADD)
43   public void testAddMeansAddOne() {
44     int originalCount = getMultiset().count(samples.e0);
45     assertTrue(getMultiset().add(samples.e0));
46     assertEquals(originalCount + 1, getMultiset().count(samples.e0));
47   }
48 
49   @CollectionFeature.Require(SUPPORTS_ADD)
50   public void testAddOccurrencesZero() {
51     int originalCount = getMultiset().count(samples.e0);
52     assertEquals("old count", originalCount, getMultiset().add(samples.e0, 0));
53     expectUnchanged();
54   }
55 
56   @CollectionFeature.Require(SUPPORTS_ADD)
57   public void testAddOccurrences() {
58     int originalCount = getMultiset().count(samples.e0);
59     assertEquals("old count", originalCount, getMultiset().add(samples.e0, 2));
60     assertEquals("old count", originalCount + 2, getMultiset().count(samples.e0));
61   }
62 
63   @CollectionFeature.Require(SUPPORTS_ADD)
64   public void testAddSeveralTimes() {
65     int originalCount = getMultiset().count(samples.e0);
66     assertEquals(originalCount, getMultiset().add(samples.e0, 2));
67     assertTrue(getMultiset().add(samples.e0));
68     assertEquals(originalCount + 3, getMultiset().add(samples.e0, 1));
69     assertEquals(originalCount + 4, getMultiset().count(samples.e0));
70   }
71 
72   @CollectionFeature.Require(absent = SUPPORTS_ADD)
73   public void testAddOccurrences_unsupported() {
74     try {
75       getMultiset().add(samples.e0, 2);
76       fail("unsupported multiset.add(E, int) didn't throw exception");
77     } catch (UnsupportedOperationException required) {}
78   }
79 
80   @CollectionFeature.Require(SUPPORTS_ADD)
81   public void testAddOccurrencesNegative() {
82     try {
83       getMultiset().add(samples.e0, -1);
84       fail("multiset.add(E, -1) didn't throw an exception");
85     } catch (IllegalArgumentException required) {}
86   }
87 
88   @CollectionFeature.Require(SUPPORTS_ADD)
89   public void testAddTooMany() {
90     getMultiset().add(samples.e3, Integer.MAX_VALUE);
91     try {
92       getMultiset().add(samples.e3);
93       fail();
94     } catch (IllegalArgumentException expected) {}
95     assertEquals(Integer.MAX_VALUE, getMultiset().count(samples.e3));
96     assertEquals(Integer.MAX_VALUE, getMultiset().size());
97   }
98 
99   @CollectionFeature.Require(SUPPORTS_ADD)
100   public void testAddAll_emptySet() {
101     assertFalse(getMultiset().addAll(Collections.<E>emptySet()));
102     expectUnchanged();
103   }
104 
105   @CollectionFeature.Require(SUPPORTS_ADD)
106   public void testAddAll_emptyMultiset() {
107     assertFalse(getMultiset().addAll(getSubjectGenerator().create()));
108     expectUnchanged();
109   }
110 
111   @CollectionFeature.Require(SUPPORTS_ADD)
112   public void testAddAll_nonEmptyList() {
113     assertTrue(getMultiset().addAll(Arrays.asList(samples.e3, samples.e4, samples.e3)));
114     expectAdded(samples.e3, samples.e4, samples.e3);
115   }
116 
117   @CollectionFeature.Require(SUPPORTS_ADD)
118   public void testAddAll_nonEmptyMultiset() {
119     assertTrue(getMultiset().addAll(
120         getSubjectGenerator().create(samples.e3, samples.e4, samples.e3)));
121     expectAdded(samples.e3, samples.e4, samples.e3);
122   }
123 }
124