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diff --git a/third_party/protobuf/3.6.0/csharp/src/Google.Protobuf.Test/Collections/ProtobufEqualityComparersTest.cs b/third_party/protobuf/3.6.0/csharp/src/Google.Protobuf.Test/Collections/ProtobufEqualityComparersTest.cs
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--- a/third_party/protobuf/3.6.0/csharp/src/Google.Protobuf.Test/Collections/ProtobufEqualityComparersTest.cs
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@@ -1,124 +0,0 @@
-#region Copyright notice and license
-// Protocol Buffers - Google's data interchange format
-// Copyright 2017 Google Inc. All rights reserved.
-// https://developers.google.com/protocol-buffers/
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-// * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-// * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-// * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-#endregion
-
-using NUnit.Framework;
-using System.Collections.Generic;
-using System.Linq;
-using static Google.Protobuf.Collections.ProtobufEqualityComparers;
-
-namespace Google.Protobuf.Collections
-{
- public class ProtobufEqualityComparersTest
- {
- private static readonly double[] doubles =
- {
- 0,
- 1,
- 1.5,
- -1.5,
- double.PositiveInfinity,
- double.NegativeInfinity,
- // Three different types of NaN...
- SampleNaNs.Regular,
- SampleNaNs.SignallingFlipped,
- SampleNaNs.PayloadFlipped
- };
-
- [Test]
- public void GetEqualityComparer_Default()
- {
- // It's more pain than it's worth to try to parameterize these tests.
- Assert.AreSame(EqualityComparer<object>.Default, GetEqualityComparer<object>());
- Assert.AreSame(EqualityComparer<string>.Default, GetEqualityComparer<string>());
- Assert.AreSame(EqualityComparer<int>.Default, GetEqualityComparer<int>());
- Assert.AreSame(EqualityComparer<int?>.Default, GetEqualityComparer<int?>());
- }
-
- [Test]
- public void GetEqualityComparer_NotDefault()
- {
- // It's more pain than it's worth to try to parameterize these tests.
- Assert.AreSame(BitwiseDoubleEqualityComparer, GetEqualityComparer<double>());
- Assert.AreSame(BitwiseSingleEqualityComparer, GetEqualityComparer<float>());
- Assert.AreSame(BitwiseNullableDoubleEqualityComparer, GetEqualityComparer<double?>());
- Assert.AreSame(BitwiseNullableSingleEqualityComparer, GetEqualityComparer<float?>());
- }
-
- [Test]
- public void DoubleComparisons()
- {
- ValidateEqualityComparer(BitwiseDoubleEqualityComparer, doubles);
- }
-
- [Test]
- public void NullableDoubleComparisons()
- {
- ValidateEqualityComparer(BitwiseNullableDoubleEqualityComparer, doubles.Select(d => (double?) d).Concat(new double?[] { null }));
- }
-
- [Test]
- public void SingleComparisons()
- {
- ValidateEqualityComparer(BitwiseSingleEqualityComparer, doubles.Select(d => (float) d));
- }
-
- [Test]
- public void NullableSingleComparisons()
- {
- ValidateEqualityComparer(BitwiseNullableSingleEqualityComparer, doubles.Select(d => (float?) d).Concat(new float?[] { null }));
- }
-
- private static void ValidateEqualityComparer<T>(EqualityComparer<T> comparer, IEnumerable<T> values)
- {
- var array = values.ToArray();
- // Each value should be equal to itself, but not to any other value.
- for (int i = 0; i < array.Length; i++)
- {
- for (int j = 0; j < array.Length; j++)
- {
- if (i == j)
- {
- Assert.IsTrue(comparer.Equals(array[i], array[j]),
- "{0} should be equal to itself", array[i], array[j]);
- }
- else
- {
- Assert.IsFalse(comparer.Equals(array[i], array[j]),
- "{0} and {1} should not be equal", array[i], array[j]);
- Assert.AreNotEqual(comparer.GetHashCode(array[i]), comparer.GetHashCode(array[j]),
- "Hash codes for {0} and {1} should not be equal", array[i], array[j]);
- }
- }
- }
- }
- }
-}