Coverage Summary for Class: ListRetainAllTester (com.google.common.collect.testing.testers)

1 /*
2  * Copyright (C) 2008 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.testers;
18 
19 import static com.google.common.collect.testing.Helpers.assertContentsInOrder;
20 import static com.google.common.collect.testing.features.CollectionFeature.SUPPORTS_REMOVE;
21 import static com.google.common.collect.testing.features.CollectionSize.ONE;
22 import static com.google.common.collect.testing.features.CollectionSize.SEVERAL;
23 import static com.google.common.collect.testing.features.CollectionSize.ZERO;
24 
25 import com.google.common.annotations.GwtCompatible;
26 import com.google.common.collect.testing.MinimalCollection;
27 import com.google.common.collect.testing.features.CollectionFeature;
28 import com.google.common.collect.testing.features.CollectionSize;
29 import java.util.Arrays;
30 import org.junit.Ignore;
31 
32 /**
33  * A generic JUnit test which tests {@code retainAll} operations on a list. Can't be invoked
34  * directly; please see {@link com.google.common.collect.testing.ListTestSuiteBuilder}.
35  *
36  * @author Chris Povirk
37  */
38 @GwtCompatible
39 @Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
40 public class ListRetainAllTester<E> extends AbstractListTester<E> {
41   @CollectionFeature.Require(SUPPORTS_REMOVE)
42   @CollectionSize.Require(absent = {ZERO, ONE})
43   public void testRetainAll_duplicatesKept() {
44     E[] array = createSamplesArray();
45     array[1] = e0();
46     collection = getSubjectGenerator().create(array);
47     assertFalse(
48         "containsDuplicates.retainAll(superset) should return false",
49         collection.retainAll(MinimalCollection.of(createSamplesArray())));
50     expectContents(array);
51   }
52 
53   @SuppressWarnings("unchecked")
54   @CollectionFeature.Require(SUPPORTS_REMOVE)
55   @CollectionSize.Require(SEVERAL)
56   public void testRetainAll_duplicatesRemoved() {
57     E[] array = createSamplesArray();
58     array[1] = e0();
59     collection = getSubjectGenerator().create(array);
60     assertTrue(
61         "containsDuplicates.retainAll(subset) should return true",
62         collection.retainAll(MinimalCollection.of(e2())));
63     expectContents(e2());
64   }
65 
66   @SuppressWarnings("unchecked")
67   @CollectionFeature.Require(SUPPORTS_REMOVE)
68   @CollectionSize.Require(SEVERAL)
69   public void testRetainAll_countIgnored() {
70     resetContainer(getSubjectGenerator().create(e0(), e2(), e1(), e0()));
71     assertTrue(getList().retainAll(Arrays.asList(e0(), e1())));
72     assertContentsInOrder(getList(), e0(), e1(), e0());
73   }
74 }