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_RETAIN_ALL; 20 import static com.google.common.collect.testing.features.CollectionSize.ONE; 21 import static com.google.common.collect.testing.features.CollectionSize.SEVERAL; 22 import static com.google.common.collect.testing.features.CollectionSize.ZERO; 23 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 {@code retainAll} operations on a list. 30 * Can't be invoked directly; please see 31 * {@link com.google.common.collect.testing.ListTestSuiteBuilder}. 32 * 33 * <p>This class is GWT compatible. 34 * 35 * @author Chris Povirk 36 */ 37 public class ListRetainAllTester<E> extends AbstractListTester<E> { 38 @CollectionFeature.Require(SUPPORTS_RETAIN_ALL) 39 @CollectionSize.Require(absent = {ZERO, ONE}) 40 public void testRetainAll_duplicatesKept() { 41 E[] array = createSamplesArray(); 42 array[1] = samples.e0; 43 collection = getSubjectGenerator().create(array); 44 assertFalse("containsDuplicates.retainAll(superset) should return false", 45 collection.retainAll(MinimalCollection.of(createSamplesArray()))); 46 expectContents(array); 47 } 48 49 @SuppressWarnings("unchecked") 50 @CollectionFeature.Require(SUPPORTS_RETAIN_ALL) 51 @CollectionSize.Require(SEVERAL) 52 public void testRetainAll_duplicatesRemoved() { 53 E[] array = createSamplesArray(); 54 array[1] = samples.e0; 55 collection = getSubjectGenerator().create(array); 56 assertTrue("containsDuplicates.retainAll(subset) should return true", 57 collection.retainAll(MinimalCollection.of(samples.e2))); 58 expectContents(samples.e2); 59 } 60 } 61
