1   /*
2    * Copyright (C) 2007 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 com.google.common.annotations.GwtCompatible;
20  import com.google.common.collect.testing.AbstractCollectionTester;
21  
22  /**
23   * Tests {@link java.util.Collection#equals}.
24   *
25   * @author George van den Driessche
26   */
27  @GwtCompatible
28  public class CollectionEqualsTester<E> extends AbstractCollectionTester<E> {
29    public void testEquals_self() {
30      assertTrue("An Object should be equal to itself.",
31          collection.equals(collection));
32    }
33  
34    public void testEquals_null() {
35      //noinspection ObjectEqualsNull
36      assertFalse("An object should not be equal to null.",
37          collection.equals(null));
38    }
39  
40    public void testEquals_notACollection() {
41      //noinspection EqualsBetweenInconvertibleTypes
42      assertFalse("A Collection should never equal an "
43          + "object that is not a Collection.",
44          collection.equals("huh?"));
45    }
46  }