Fix Unicode BiDi Category (dotnet#55790)

Author: tarekgh

src/libraries/System.Globalization/tests/System/Globalization/CharUnicodeInfoTestData.cs

@@ -44,9 +44,11 @@ private static void Parse(List<CharUnicodeInfoTestCase> testCases, string line)
             string charName = data[1];
             string charCategoryString = data[2];
             string numericValueString = data[8];
+            StrongBidiCategory bidiCategory = data[4] == "L" ? StrongBidiCategory.StrongLeftToRight :
+                                              data[4] == "R" || data[4] == "AL" ? StrongBidiCategory.StrongRightToLeft : StrongBidiCategory.Other;
 
             int codePoint = int.Parse(charValueString, NumberStyles.HexNumber);
-            Parse(testCases, codePoint, charCategoryString, numericValueString);
+            Parse(testCases, codePoint, charCategoryString, numericValueString, bidiCategory);
 
             if (charName.EndsWith("First>"))
             {
@@ -59,7 +61,7 @@ private static void Parse(List<CharUnicodeInfoTestCase> testCases, string line)
                 {
                     // Assumes that all code points in the range have the same numeric value
                     // and general category
-                    Parse(testCases, rangeCodePoint, charCategoryString, numericValueString);
+                    Parse(testCases, rangeCodePoint, charCategoryString, numericValueString, bidiCategory);
                 }
             }
         }
@@ -99,7 +101,7 @@ private static void Parse(List<CharUnicodeInfoTestCase> testCases, string line)
             ["Lu"] = UnicodeCategory.UppercaseLetter
         };
 
-        private static void Parse(List<CharUnicodeInfoTestCase> testCases, int codePoint, string charCategoryString, string numericValueString)
+        private static void Parse(List<CharUnicodeInfoTestCase> testCases, int codePoint, string charCategoryString, string numericValueString, StrongBidiCategory bidiCategory)
         {
             string codeValueRepresentation = codePoint > char.MaxValue ? char.ConvertFromUtf32(codePoint) : ((char)codePoint).ToString();
             double numericValue = ParseNumericValueString(numericValueString);
@@ -110,7 +112,8 @@ private static void Parse(List<CharUnicodeInfoTestCase> testCases, int codePoint
                 Utf32CodeValue = codeValueRepresentation,
                 GeneralCategory = generalCategory,
                 NumericValue = numericValue,
-                CodePoint = codePoint
+                CodePoint = codePoint,
+                BidiCategory = bidiCategory
             });
         }
 
@@ -141,11 +144,19 @@ private static double ParseNumericValueString(string numericValueString)
         }
     }
 
+    public enum StrongBidiCategory
+    {
+        Other = 0x00,
+        StrongLeftToRight = 0x20,
+        StrongRightToLeft = 0x40,
+    }
+
     public class CharUnicodeInfoTestCase
     {
         public string Utf32CodeValue { get; set; }
         public int CodePoint { get; set; }
         public UnicodeCategory GeneralCategory { get; set; }
         public double NumericValue { get; set; }
+        public StrongBidiCategory BidiCategory { get; set; }
     }
 }

src/libraries/System.Globalization/tests/System/Globalization/CharUnicodeInfoTests.cs

@@ -2,6 +2,7 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 
 using Xunit;
+using System.Reflection;
 
 namespace System.Globalization.Tests
 {
@@ -12,6 +13,9 @@ public partial class CharUnicodeInfoTests
         [Fact]
         public void GetUnicodeCategory()
         {
+            MethodInfo GetBidiCategory = Type.GetType("System.Globalization.CharUnicodeInfo").GetMethod("GetBidiCategoryNoBoundsChecks", BindingFlags.NonPublic | BindingFlags.Static | BindingFlags.Instance | BindingFlags.InvokeMethod);
+            object [] parameters = new object [] { 0 };
+
             foreach (CharUnicodeInfoTestCase testCase in CharUnicodeInfoTestData.TestCases)
             {
                 if (testCase.Utf32CodeValue.Length == 1)
@@ -22,6 +26,9 @@ public void GetUnicodeCategory()
                 // Test the string overload for a surrogate pair or a single char
                 GetUnicodeCategoryTest_String(testCase.Utf32CodeValue, new UnicodeCategory[] { testCase.GeneralCategory });
                 Assert.Equal(testCase.GeneralCategory, CharUnicodeInfo.GetUnicodeCategory(testCase.CodePoint));
+
+                parameters[0] = (uint)testCase.CodePoint;
+                Assert.Equal(testCase.BidiCategory, (StrongBidiCategory)GetBidiCategory.Invoke(null, parameters));
             }
         }
 

src/libraries/System.Private.CoreLib/src/System/Globalization/StrongBidiCategory.cs

@@ -10,7 +10,7 @@ namespace System.Globalization
     internal enum StrongBidiCategory
     {
         Other = 0x00,
-        StrongLeftToRight = 0x10,
-        StrongRightToLeft = 0x20,
+        StrongLeftToRight = 0x20,
+        StrongRightToLeft = 0x40,
     }
 }