MultisetAddTester.java revision 0888a09821a98ac0680fad765217302858e70fa4 
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.CollectionFeature.SUPPORTS_ADD;
20
21import com.google.common.annotations.GwtCompatible;
22import com.google.common.collect.testing.features.CollectionFeature;
23
24import java.util.Arrays;
25import java.util.Collections;
26
27/**
28 * Tests for {@code Multiset.add}.
29 *
30 * @author Jared Levy
31 */
32@GwtCompatible
33public 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