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.features.CollectionFeature; 025import com.google.common.collect.testing.features.CollectionSize; 026import org.junit.Ignore; 027 028/** 029 * A generic JUnit test which tests {@code remove(Object)} operations on a list. Can't be invoked 030 * directly; please see {@link com.google.common.collect.testing.ListTestSuiteBuilder}. 031 * 032 * @author George van den Driessche 033 */ 034@GwtCompatible 035@Ignore("test runners must not instantiate and run this directly, only via suites we build") 036// @Ignore affects the Android test runner, which respects JUnit 4 annotations on JUnit 3 tests. 037@SuppressWarnings("JUnit4ClassUsedInJUnit3") 038public class ListRemoveTester<E> extends AbstractListTester<E> { 039 @CollectionFeature.Require(SUPPORTS_REMOVE) 040 @CollectionSize.Require(absent = {ZERO, ONE}) 041 public void testRemove_duplicate() { 042 ArrayWithDuplicate<E> arrayAndDuplicate = createArrayWithDuplicateElement(); 043 collection = getSubjectGenerator().create(arrayAndDuplicate.elements); 044 E duplicate = arrayAndDuplicate.duplicate; 045 046 int firstIndex = getList().indexOf(duplicate); 047 int initialSize = getList().size(); 048 assertTrue("remove(present) should return true", getList().remove(duplicate)); 049 assertTrue( 050 "After remove(duplicate), a list should still contain the duplicate element", 051 getList().contains(duplicate)); 052 assertFalse( 053 "remove(duplicate) should remove the first instance of the " 054 + "duplicate element in the list", 055 firstIndex == getList().indexOf(duplicate)); 056 assertEquals( 057 "remove(present) should decrease the size of a list by one.", 058 initialSize - 1, 059 getList().size()); 060 } 061}