From: Ulrich Weigand <ulrich.weigand@de.ibm.com>
Date: Tue, 29 Jun 2021 21:02:03 +0000 (+0200)
Subject: Big-endian fix for DoubleTests.cs:ParsePatterns (#54818)
X-Git-Tag: submit/tizen/20210909.063632~506
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=36e0432547d7d734ef23fce40e8c278ef80c34c8;p=platform%2Fupstream%2Fdotnet%2Fruntime.git

Big-endian fix for DoubleTests.cs:ParsePatterns (#54818)

The recently added DoubleTests.cs:ParsePatterns test case
incorrectly swaps characters of the hexadecimal representation
of the floating-point numbers under test on big-endian platforms.
---

diff --git a/src/libraries/System.Runtime/tests/System/DoubleTests.cs b/src/libraries/System.Runtime/tests/System/DoubleTests.cs
index a80eb05..79bbac4 100644
--- a/src/libraries/System.Runtime/tests/System/DoubleTests.cs
+++ b/src/libraries/System.Runtime/tests/System/DoubleTests.cs
@@ -4,6 +4,7 @@
 using System.Collections.Generic;
 using System.Globalization;
 using System.IO;
+using System.Linq;
 using Xunit;
 
 #pragma warning disable xUnit1025 // reporting duplicate test cases due to not distinguishing 0.0 from -0.0, NaN from -NaN
@@ -349,15 +350,12 @@ namespace System.Tests
 
         internal static string SplitPairs(string input)
         {
-            string[] splitPairs = input.Split('-');
-            string ret = "";
-            foreach (var pair in splitPairs)
+            if (!BitConverter.IsLittleEndian)
             {
-                string reversedPair = Reverse(pair);
-                ret += reversedPair;
+                return input.Replace("-", "");
             }
 
-            return ret;
+            return string.Concat(input.Split('-').Select(pair => Reverse(pair)));
         }
 
         internal static string Reverse(string s)