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
33using System;
34using NUnit.Framework;
35
36namespace 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