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.Helpers.assertContentsInOrder;
020import static com.google.common.collect.testing.features.CollectionFeature.SUPPORTS_REMOVE;
021import static com.google.common.collect.testing.features.CollectionSize.ONE;
022import static com.google.common.collect.testing.features.CollectionSize.SEVERAL;
023import static com.google.common.collect.testing.features.CollectionSize.ZERO;
024import static java.util.Arrays.asList;
025
026import com.google.common.annotations.GwtCompatible;
027import com.google.common.collect.testing.MinimalCollection;
028import com.google.common.collect.testing.features.CollectionFeature;
029import com.google.common.collect.testing.features.CollectionSize;
030import org.junit.Ignore;
031
032/**
033 * A generic JUnit test which tests {@code retainAll} operations on a list. Can't be invoked
034 * directly; please see {@link com.google.common.collect.testing.ListTestSuiteBuilder}.
035 *
036 * @author Chris Povirk
037 */
038@GwtCompatible
039@Ignore("test runners must not instantiate and run this directly, only via suites we build")
040// @Ignore affects the Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
041@SuppressWarnings("JUnit4ClassUsedInJUnit3")
042public class ListRetainAllTester<E> extends AbstractListTester<E> {
043  @CollectionFeature.Require(SUPPORTS_REMOVE)
044  @CollectionSize.Require(absent = {ZERO, ONE})
045  public void testRetainAll_duplicatesKept() {
046    E[] array = createSamplesArray();
047    array[1] = e0();
048    collection = getSubjectGenerator().create(array);
049    assertFalse(
050        "containsDuplicates.retainAll(superset) should return false",
051        collection.retainAll(MinimalCollection.of(createSamplesArray())));
052    expectContents(array);
053  }
054
055  @CollectionFeature.Require(SUPPORTS_REMOVE)
056  @CollectionSize.Require(SEVERAL)
057  public void testRetainAll_duplicatesRemoved() {
058    E[] array = createSamplesArray();
059    array[1] = e0();
060    collection = getSubjectGenerator().create(array);
061    assertTrue(
062        "containsDuplicates.retainAll(subset) should return true",
063        collection.retainAll(MinimalCollection.of(e2())));
064    expectContents(e2());
065  }
066
067  @CollectionFeature.Require(SUPPORTS_REMOVE)
068  @CollectionSize.Require(SEVERAL)
069  public void testRetainAll_countIgnored() {
070    resetContainer(getSubjectGenerator().create(e0(), e2(), e1(), e0()));
071    assertTrue(getList().retainAll(asList(e0(), e1())));
072    assertContentsInOrder(getList(), e0(), e1(), e0());
073  }
074}