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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  
30    // TODO(cpovirk): Consider using EqualsTester from Guava.
31    @SuppressWarnings("SelfEquals")
32    public void testEquals_self() {
33      assertTrue("An Object should be equal to itself.", collection.equals(collection));
34    }
35  
36    public void testEquals_null() {
37      //noinspection ObjectEqualsNull
38      assertFalse("An object should not be equal to null.", collection.equals(null));
39    }
40  
41    public void testEquals_notACollection() {
42      //noinspection EqualsBetweenInconvertibleTypes
43      assertFalse(
44          "A Collection should never equal an object that is not a Collection.",
45          collection.equals("huh?"));
46    }
47  }