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1 #region Copyright notice and license
2 // Protocol Buffers - Google's data interchange format
3 // Copyright 2015 Google Inc.  All rights reserved.
4 // https://developers.google.com/protocol-buffers/
5 //
6 // Redistribution and use in source and binary forms, with or without
7 // modification, are permitted provided that the following conditions are
8 // met:
9 //
10 //     * Redistributions of source code must retain the above copyright
11 // notice, this list of conditions and the following disclaimer.
12 //     * Redistributions in binary form must reproduce the above
13 // copyright notice, this list of conditions and the following disclaimer
14 // in the documentation and/or other materials provided with the
15 // distribution.
16 //     * Neither the name of Google Inc. nor the names of its
17 // contributors may be used to endorse or promote products derived from
18 // this software without specific prior written permission.
19 //
20 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 #endregion
32 
33 using System;
34 using NUnit.Framework;
35 
36 namespace Google.Protobuf
37 {
38     /// <summary>
39     /// Helper methods when testing equality. NUnit's Assert.AreEqual and
40     /// Assert.AreNotEqual methods try to be clever with collections, which can
41     /// be annoying...
42     /// </summary>
43     internal static class EqualityTester
44     {
45         public static void AssertEquality<T>(T first, T second) where T : IEquatable<T>
46         {
47             Assert.IsTrue(first.Equals(second));
48             Assert.IsTrue(first.Equals((object) second));
49             Assert.AreEqual(first.GetHashCode(), second.GetHashCode());
50         }
51 
52         public static void AssertInequality<T>(T first, T second) where T : IEquatable<T>
53         {
54             Assert.IsFalse(first.Equals(second));
55             Assert.IsFalse(first.Equals((object) second));
56             // While this isn't a requirement, the chances of this test failing due to
57             // coincidence rather than a bug are very small.
58             if (first != null && second != null)
59             {
60                 Assert.AreNotEqual(first.GetHashCode(), second.GetHashCode());
61             }
62         }
63     }
64 }
65