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}