#52851 Enable/ Skip test case on MacCatalyst (#74070)

Author: mkhamoyan

src/libraries/Common/tests/TestUtilities/System/PlatformDetection.cs

@@ -43,6 +43,7 @@ public static partial class PlatformDetection
         public static bool IsiOS => RuntimeInformation.IsOSPlatform(OSPlatform.Create("IOS"));
         public static bool IstvOS => RuntimeInformation.IsOSPlatform(OSPlatform.Create("TVOS"));
         public static bool IsMacCatalyst => RuntimeInformation.IsOSPlatform(OSPlatform.Create("MACCATALYST"));
+        public static bool IsNotMacCatalyst => !IsMacCatalyst;
         public static bool Isillumos => RuntimeInformation.IsOSPlatform(OSPlatform.Create("ILLUMOS"));
         public static bool IsSolaris => RuntimeInformation.IsOSPlatform(OSPlatform.Create("SOLARIS"));
         public static bool IsBrowser => RuntimeInformation.IsOSPlatform(OSPlatform.Create("BROWSER"));

src/libraries/Microsoft.VisualBasic.Core/tests/FileSystemTests.cs

@@ -23,12 +23,11 @@ protected override void Dispose(bool disposing)
             base.Dispose(disposing);
         }
 
-        // On OSX, the temp directory /tmp/ is a symlink to /private/tmp, so setting the current
+        // On OSX/MacCatalyst, the temp directory /tmp/ is a symlink to /private/tmp, so setting the current
         // directory to a symlinked path will result in GetCurrentDirectory returning the absolute
         // path that followed the symlink.
-        [ConditionalFact(typeof(PlatformDetection), nameof(PlatformDetection.IsNotOSX))]
+        [ConditionalFact(typeof(PlatformDetection), nameof(PlatformDetection.IsNotOSX), nameof(PlatformDetection.IsNotMacCatalyst))]
         [ActiveIssue("https://github.com/dotnet/runtime/issues/50572", TestPlatforms.Android)]
-        [ActiveIssue("https://github.com/dotnet/runtime/issues/52851", TestPlatforms.MacCatalyst)]
         public void ChDir()
         {
             var savedDirectory = System.IO.Directory.GetCurrentDirectory();
@@ -86,7 +85,6 @@ static string getString(string fileName)
         // Can't get current directory on OSX before setting it.
         [ConditionalFact(typeof(PlatformDetection), nameof(PlatformDetection.IsNotOSX))]
         [ActiveIssue("https://github.com/dotnet/runtime/issues/50572", TestPlatforms.Android)]
-        [ActiveIssue("https://github.com/dotnet/runtime/issues/52851", TestPlatforms.MacCatalyst)]
         public void CurDir()
         {
             Assert.Equal(FileSystem.CurDir(), System.IO.Directory.GetCurrentDirectory());