/*
    * Copyright (C) 2008 The Guava Authors
    *
    * Licensed under the Apache License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    * http://www.apache.org/licenses/LICENSE-2.0
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package com.google.common.collect.testing.testers;
  
  import static com.google.common.collect.testing.features.CollectionFeature.SUPPORTS_REMOVE;
  import static com.google.common.collect.testing.features.CollectionSize.ONE;
  import static com.google.common.collect.testing.features.CollectionSize.ZERO;
  
  import com.google.common.annotations.GwtCompatible;
  import com.google.common.collect.testing.features.CollectionFeature;
  import com.google.common.collect.testing.features.CollectionSize;
  
  /**
   * A generic JUnit test which tests {@code remove(Object)} operations on a list.
   * Can't be invoked directly; please see
   * {@link com.google.common.collect.testing.ListTestSuiteBuilder}.
   *
   * @author George van den Driessche
   */
  @GwtCompatible
  public class ListRemoveTester<E> extends AbstractListTester<E> {
    @CollectionFeature.Require(SUPPORTS_REMOVE)
    @CollectionSize.Require(absent = {ZERO, ONE})
    public void testRemove_duplicate() {
      ArrayWithDuplicate<E> arrayAndDuplicate = createArrayWithDuplicateElement();
      collection = getSubjectGenerator().create(arrayAndDuplicate.elements);
      E duplicate = arrayAndDuplicate.duplicate;
  
      int firstIndex = getList().indexOf(duplicate);
      int initialSize = getList().size();
      assertTrue("remove(present) should return true",
          getList().remove(duplicate));
      assertTrue("After remove(duplicate), a list should still contain "
          + "the duplicate element", getList().contains(duplicate));
      assertFalse("remove(duplicate) should remove the first instance of the "
          + "duplicate element in the list",
          firstIndex == getList().indexOf(duplicate));
      assertEquals("remove(present) should decrease the size of a list by one.",
          initialSize - 1, getList().size());
    }
  }