CollectionEqualsTester.java revision 3c77433663281544363151bf284b0240dfd22a42 
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
17package com.google.common.collect.testing.testers;
18
19import com.google.common.annotations.GwtCompatible;
20import com.google.common.collect.testing.AbstractCollectionTester;
21
22/**
23 * Tests {@link java.util.Collection#equals}.
24 *
25 * <p>This class is GWT compatible.
26 *
27 * @author George van den Driessche
28 */
29@GwtCompatible
30public class CollectionEqualsTester<E> extends AbstractCollectionTester<E> {
31  public void testEquals_self() {
32    assertTrue("An Object should be equal to itself.",
33        collection.equals(collection));
34  }
35
36  public void testEquals_null() {
37    //noinspection ObjectEqualsNull
38    assertFalse("An object should not be equal to null.",
39        collection.equals(null));
40  }
41
42  public void testEquals_notACollection() {
43    //noinspection EqualsBetweenInconvertibleTypes
44    assertFalse("A Collection should never equal an "
45        + "object that is not a Collection.",
46        collection.equals("huh?"));
47  }
48}
49