MultisetElementSetTester.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;
20import static com.google.common.collect.testing.features.CollectionFeature.SUPPORTS_REMOVE;
21import static com.google.common.collect.testing.features.CollectionSize.SEVERAL;
22import static com.google.common.collect.testing.features.CollectionSize.ZERO;
23import static org.truth0.Truth.ASSERT;
24
25import com.google.common.annotations.GwtCompatible;
26import com.google.common.collect.testing.features.CollectionFeature;
27import com.google.common.collect.testing.features.CollectionSize;
28
29import java.util.Collections;
30import java.util.Set;
31
32/**
33 * Tests for {@code Multiset.elementSet()} not covered by the derived {@code SetTestSuiteBuilder}.
34 *
35 * @author Louis Wasserman
36 */
37@GwtCompatible
38public class MultisetElementSetTester<E> extends AbstractMultisetTester<E> {
39  @CollectionFeature.Require(SUPPORTS_ADD)
40  public void testElementSetReflectsAddAbsent() {
41    Set<E> elementSet = getMultiset().elementSet();
42    assertFalse(elementSet.contains(samples.e3));
43    getMultiset().add(samples.e3, 4);
44    assertTrue(elementSet.contains(samples.e3));
45  }
46
47  @CollectionSize.Require(absent = ZERO)
48  @CollectionFeature.Require(SUPPORTS_REMOVE)
49  public void testElementSetReflectsRemove() {
50    Set<E> elementSet = getMultiset().elementSet();
51    assertTrue(elementSet.contains(samples.e0));
52    getMultiset().removeAll(Collections.singleton(samples.e0));
53    assertFalse(elementSet.contains(samples.e0));
54  }
55
56  @CollectionSize.Require(absent = ZERO)
57  @CollectionFeature.Require(SUPPORTS_REMOVE)
58  public void testElementSetRemovePropagatesToMultiset() {
59    Set<E> elementSet = getMultiset().elementSet();
60    assertTrue(elementSet.remove(samples.e0));
61    assertFalse(getMultiset().contains(samples.e0));
62  }
63
64  @CollectionSize.Require(SEVERAL)
65  @CollectionFeature.Require(SUPPORTS_REMOVE)
66  public void testElementSetRemoveDuplicatePropagatesToMultiset() {
67    initThreeCopies();
68    Set<E> elementSet = getMultiset().elementSet();
69    assertTrue(elementSet.remove(samples.e0));
70    ASSERT.that(getMultiset()).isEmpty();
71  }
72
73  @CollectionFeature.Require(SUPPORTS_REMOVE)
74  public void testElementSetRemoveAbsent() {
75    Set<E> elementSet = getMultiset().elementSet();
76    assertFalse(elementSet.remove(samples.e3));
77    expectUnchanged();
78  }
79
80  @CollectionFeature.Require(SUPPORTS_REMOVE)
81  public void testElementSetClear() {
82    getMultiset().elementSet().clear();
83    ASSERT.that(getMultiset()).isEmpty();
84  }
85}
86