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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.features.CollectionFeature.SUPPORTS_REMOVE;
20  import static com.google.common.collect.testing.features.CollectionSize.ONE;
21  import static com.google.common.collect.testing.features.CollectionSize.ZERO;
22  
23  import com.google.common.annotations.GwtCompatible;
24  import com.google.common.collect.testing.MinimalCollection;
25  import com.google.common.collect.testing.features.CollectionFeature;
26  import com.google.common.collect.testing.features.CollectionSize;
27  
28  /**
29   * A generic JUnit test which tests removeAll operations on a list. Can't be
30   * invoked directly; please see
31   * {@link com.google.common.collect.testing.ListTestSuiteBuilder}.
32   *
33   * @author George van den Driessche
34   */
35  @SuppressWarnings("unchecked") // too many "unchecked generic array creations"
36  @GwtCompatible
37  public class ListRemoveAllTester<E> extends AbstractListTester<E> {
38    @CollectionFeature.Require(SUPPORTS_REMOVE)
39    @CollectionSize.Require(absent = {ZERO, ONE})
40    public void testRemoveAll_duplicate() {
41      ArrayWithDuplicate<E> arrayAndDuplicate = createArrayWithDuplicateElement();
42      collection = getSubjectGenerator().create(arrayAndDuplicate.elements);
43      E duplicate = arrayAndDuplicate.duplicate;
44  
45      assertTrue(
46          "removeAll(intersectingCollection) should return true",
47          getList().removeAll(MinimalCollection.of(duplicate)));
48      assertFalse(
49          "after removeAll(e), a collection should not contain e even "
50              + "if it initially contained e more than once.",
51          getList().contains(duplicate));
52    }
53  
54    // All other cases are covered by CollectionRemoveAllTester.
55  }