From b016a5661ec64e7304380afa44ad9667bd5519a8 Mon Sep 17 00:00:00 2001
From: Jan Kotas <jkotas@microsoft.com>
Date: Thu, 29 Nov 2018 18:39:36 -0800
Subject: [PATCH] Undo accidental change

Commit migrated from https://github.com/dotnet/coreclr/commit/afbcdb2ede89e3c75b1bc658e25884bc5daf30f5
---
 .../src/System/MemoryExtensions.Fast.cs            | 54 ----------------------
 1 file changed, 54 deletions(-)

diff --git a/src/libraries/System.Private.CoreLib/src/System/MemoryExtensions.Fast.cs b/src/libraries/System.Private.CoreLib/src/System/MemoryExtensions.Fast.cs
index 51ebd8d..11980fb 100644
--- a/src/libraries/System.Private.CoreLib/src/System/MemoryExtensions.Fast.cs
+++ b/src/libraries/System.Private.CoreLib/src/System/MemoryExtensions.Fast.cs
@@ -2,12 +2,10 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-using System.Collections.Generic;
 using System.Diagnostics;
 using System.Globalization;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
-using Xunit;
 
 using Internal.Runtime.CompilerServices;
 
@@ -382,58 +380,6 @@ namespace System
                     CultureInfo.CurrentCulture.CompareInfo.IsPrefix(span, value, string.GetCaseCompareOfComparisonCulture(comparisonType));
         }
 
-        [Theory]
-        [InlineData(new char[0], new int[0])] // empty
-        [InlineData(new char[] { 'x', 'y', 'z' }, new int[] { 'x', 'y', 'z' })]
-        [InlineData(new char[] { 'x', '\uD86D', '\uDF54', 'y' }, new int[] { 'x', 0x2B754, 'y' })] // valid surrogate pair
-        [InlineData(new char[] { 'x', '\uD86D', 'y' }, new int[] { 'x', 0xFFFD, 'y' })] // standalone high surrogate
-        [InlineData(new char[] { 'x', '\uDF54', 'y' }, new int[] { 'x', 0xFFFD, 'y' })] // standalone low surrogate
-        [InlineData(new char[] { 'x', '\uD86D' }, new int[] { 'x', 0xFFFD })] // standalone high surrogate at end of string
-        [InlineData(new char[] { 'x', '\uDF54' }, new int[] { 'x', 0xFFFD })] // standalone low surrogate at end of string
-        [InlineData(new char[] { 'x', '\uD86D', '\uD86D', 'y' }, new int[] { 'x', 0xFFFD, 0xFFFD, 'y' })] // two high surrogates should be two replacement chars
-        [InlineData(new char[] { 'x', '\uFFFD', 'y' }, new int[] { 'x', 0xFFFD, 'y' })] // literal U+FFFD
-        public static void EnumerateRunes(char[] chars, int[] expected)
-        {
-            // Test data is smuggled as char[] instead of straight-up string since the test framework
-            // doesn't like invalid UTF-16 literals.
-
-            // first, test Span<char>
-
-            List<int> enumeratedValues = new List<int>();
-            foreach (Rune rune in ((Span<char>)chars).EnumerateRunes())
-            {
-                enumeratedValues.Add(rune.Value);
-            }
-            Assert.Equal(expected, enumeratedValues.ToArray());
-
-
-            // next, ROS<char>
-
-            enumeratedValues.Clear();
-            foreach (Rune rune in ((ReadOnlySpan<char>)chars).EnumerateRunes())
-            {
-                enumeratedValues.Add(rune.Value);
-            }
-            Assert.Equal(expected, enumeratedValues.ToArray());
-        }
-
-        [Fact]
-        public static void EnumerateRunes_DoesNotReadPastEndOfSpan(char[] chars, int[] expected)
-        {
-            // As an optimization, reading scalars from a string *may* read past the end of the string
-            // to the terminating null. This optimization is invalid for arbitrary spans, so this test
-            // ensures that we're not performing this optimization here.
-
-            ReadOnlySpan<char> span = "xy\U0002B754z".AsSpan(1, 2); // well-formed string, but span splits surrogate pair
-
-            List<int> enumeratedValues = new List<int>();
-            foreach (Rune rune in span.EnumerateRunes())
-            {
-                enumeratedValues.Add(rune.Value);
-            }
-            Assert.Equal(new int[] { 'y', '\uFFFD' }, enumeratedValues.ToArray());
-        }
-
         /// <summary>
         /// Creates a new span over the portion of the target array.
         /// </summary>
-- 
2.7.4