CollectionContainsAllTester.java revision 0888a09821a98ac0680fad765217302858e70fa4 
1/*
2 * Copyright (C) 2007 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.testers;
18
19import static com.google.common.collect.testing.features.CollectionFeature.ALLOWS_NULL_QUERIES;
20import static com.google.common.collect.testing.features.CollectionFeature.ALLOWS_NULL_VALUES;
21import static com.google.common.collect.testing.features.CollectionSize.ZERO;
22
23import com.google.common.annotations.GwtCompatible;
24import com.google.common.collect.testing.AbstractCollectionTester;
25import com.google.common.collect.testing.MinimalCollection;
26import com.google.common.collect.testing.WrongType;
27import com.google.common.collect.testing.features.CollectionFeature;
28import com.google.common.collect.testing.features.CollectionSize;
29
30import java.util.Collection;
31
32/**
33 * A generic JUnit test which tests {@code containsAll()} operations on a
34 * collection. Can't be invoked directly; please see
35 * {@link com.google.common.collect.testing.CollectionTestSuiteBuilder}.
36 *
37 * @author Kevin Bourrillion
38 * @author Chris Povirk
39 */
40@SuppressWarnings("unchecked") // too many "unchecked generic array creations"
41@GwtCompatible
42public class CollectionContainsAllTester<E>
43    extends AbstractCollectionTester<E> {
44  public void testContainsAll_empty() {
45    assertTrue("containsAll(empty) should return true",
46        collection.containsAll(MinimalCollection.of()));
47  }
48
49  @CollectionSize.Require(absent = ZERO)
50  public void testContainsAll_subset() {
51    assertTrue("containsAll(subset) should return true",
52        collection.containsAll(MinimalCollection.of(samples.e0)));
53  }
54
55  public void testContainsAll_sameElements() {
56    assertTrue("containsAll(sameElements) should return true",
57        collection.containsAll(MinimalCollection.of(createSamplesArray())));
58  }
59
60  @SuppressWarnings("ModifyingCollectionWithItself")
61  public void testContainsAll_self() {
62    assertTrue("containsAll(this) should return true",
63        collection.containsAll(collection));
64  }
65
66  public void testContainsAll_partialOverlap() {
67    assertFalse("containsAll(partialOverlap) should return false",
68        collection.containsAll(MinimalCollection.of(samples.e0, samples.e3)));
69  }
70
71  public void testContainsAll_disjoint() {
72    assertFalse("containsAll(disjoint) should return false",
73        collection.containsAll(MinimalCollection.of(samples.e3)));
74  }
75
76  @CollectionFeature.Require(absent = ALLOWS_NULL_QUERIES)
77  public void testContainsAll_nullNotAllowed() {
78    try {
79      assertFalse(collection.containsAll(MinimalCollection.of((E) null)));
80    } catch (NullPointerException tolerated) {}
81  }
82
83  @CollectionFeature.Require(ALLOWS_NULL_QUERIES)
84  public void testContainsAll_nullAllowed() {
85    assertFalse(collection.containsAll(MinimalCollection.of((E) null)));
86  }
87
88  @CollectionFeature.Require(ALLOWS_NULL_VALUES)
89  @CollectionSize.Require(absent = ZERO)
90  public void testContainsAll_nullPresent() {
91    initCollectionWithNullElement();
92    assertTrue(collection.containsAll(MinimalCollection.of((E) null)));
93  }
94
95  public void testContainsAll_wrongType() {
96    Collection<WrongType> wrong = MinimalCollection.of(WrongType.VALUE);
97    try {
98      assertFalse("containsAll(wrongType) should return false or throw",
99          collection.containsAll(wrong));
100    } catch (ClassCastException tolerated) {
101    }
102  }
103}
104