001/*
002 * Copyright (C) 2008 The Guava Authors
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package com.google.common.collect.testing.testers;
018
019import static com.google.common.collect.testing.features.CollectionFeature.SUPPORTS_REMOVE;
020import static com.google.common.collect.testing.features.CollectionSize.ONE;
021import static com.google.common.collect.testing.features.CollectionSize.ZERO;
022
023import com.google.common.annotations.GwtCompatible;
024import com.google.common.collect.testing.MinimalCollection;
025import com.google.common.collect.testing.features.CollectionFeature;
026import com.google.common.collect.testing.features.CollectionSize;
027
028/**
029 * A generic JUnit test which tests removeAll operations on a list. Can't be invoked directly;
030 * please see {@link com.google.common.collect.testing.ListTestSuiteBuilder}.
031 *
032 * @author George van den Driessche
033 */
034@GwtCompatible
035public class ListRemoveAllTester<E> extends AbstractListTester<E> {
036  @CollectionFeature.Require(SUPPORTS_REMOVE)
037  @CollectionSize.Require(absent = {ZERO, ONE})
038  public void testRemoveAll_duplicate() {
039    ArrayWithDuplicate<E> arrayAndDuplicate = createArrayWithDuplicateElement();
040    collection = getSubjectGenerator().create(arrayAndDuplicate.elements);
041    E duplicate = arrayAndDuplicate.duplicate;
042
043    assertTrue(
044        "removeAll(intersectingCollection) should return true",
045        getList().removeAll(MinimalCollection.of(duplicate)));
046    assertFalse(
047        "after removeAll(e), a collection should not contain e even "
048            + "if it initially contained e more than once.",
049        getList().contains(duplicate));
050  }
051
052  // All other cases are covered by CollectionRemoveAllTester.
053}