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.collect.testing.features.CollectionFeature; 24 import com.google.common.collect.testing.features.CollectionSize; 25 26 /** 27 * A generic JUnit test which tests {@code remove(Object)} operations on a list. 28 * Can't be invoked directly; please see 29 * {@link com.google.common.collect.testing.ListTestSuiteBuilder}. 30 * 31 * <p>This class is GWT compatible. 32 * 33 * @author George van den Driessche 34 */ 35 public class ListRemoveTester<E> extends AbstractListTester<E> { 36 @CollectionFeature.Require(SUPPORTS_REMOVE) 37 @CollectionSize.Require(absent = {ZERO, ONE}) 38 public void testRemove_duplicate() { 39 ArrayWithDuplicate<E> arrayAndDuplicate = createArrayWithDuplicateElement(); 40 collection = getSubjectGenerator().create(arrayAndDuplicate.elements); 41 E duplicate = arrayAndDuplicate.duplicate; 42 43 int firstIndex = getList().indexOf(duplicate); 44 int initialSize = getList().size(); 45 assertTrue("remove(present) should return true", 46 getList().remove(duplicate)); 47 assertTrue("After remove(duplicate), a list should still contain " 48 + "the duplicate element", getList().contains(duplicate)); 49 assertFalse("remove(duplicate) should remove the first instance of the " 50 + "duplicate element in the list", 51 firstIndex == getList().indexOf(duplicate)); 52 assertEquals("remove(present) should decrease the size of a list by one.", 53 initialSize - 1, getList().size()); 54 } 55 } 56
