Resolve tvOS/iOS FileSystem test failures

src/libraries/System.IO.FileSystem/tests/Directory/CreateDirectory.cs

@@ -466,34 +466,37 @@ public void DriveLetter_Windows()
             Assert.Equal(current.FullName, driveLetter.FullName);
         }
 
-        [Fact]
+        [ConditionalFact(typeof(RemoteExecutor), nameof(RemoteExecutor.IsSupported))]
         [PlatformSpecific(TestPlatforms.AnyUnix)]  // drive letters casing
-        [ActiveIssue("https://github.com/dotnet/runtime/issues/67853", TestPlatforms.iOS | TestPlatforms.tvOS)]
         public void DriveLetter_Unix()
         {
-            // On Unix, there's no special casing for drive letters.  These may or may not be valid names, depending
-            // on the file system underlying the current directory.  Unix file systems typically allow these, but,
-            // for example, these names are not allowed if running on a file system mounted from a Windows machine.
-            DirectoryInfo driveLetter;
-            try
-            {
-                driveLetter = Create("C:");
-            }
-            catch (IOException)
-            {
-                return;
-            }
-            var current = Create(".");
-            Assert.Equal("C:", driveLetter.Name);
-            Assert.Equal(Path.Combine(current.FullName, "C:"), driveLetter.FullName);
-            try
+            RemoteExecutor.Invoke(() =>
             {
-                // If this test is inherited then it's possible this call will fail due to the "C:" directory
-                // being deleted in that other test before this call. What we care about testing (proper path
-                // handling) is unaffected by this race condition.
-                Directory.Delete("C:");
-            }
-            catch (DirectoryNotFoundException) { }
+                Directory.SetCurrentDirectory(Path.GetTempPath());
+                // On Unix, there's no special casing for drive letters.  These may or may not be valid names, depending
+                // on the file system underlying the current directory.  Unix file systems typically allow these, but,
+                // for example, these names are not allowed if running on a file system mounted from a Windows machine.
+                DirectoryInfo driveLetter;
+                try
+                {
+                    driveLetter = Create("C:");
+                }
+                catch (IOException)
+                {
+                    return;
+                }
+                var current = Create(".");
+                Assert.Equal("C:", driveLetter.Name);
+                Assert.Equal(Path.Combine(current.FullName, "C:"), driveLetter.FullName);
+                try
+                {
+                    // If this test is inherited then it's possible this call will fail due to the "C:" directory
+                    // being deleted in that other test before this call. What we care about testing (proper path
+                    // handling) is unaffected by this race condition.
+                    Directory.Delete("C:");
+                }
+                catch (DirectoryNotFoundException) { }
+            }).Dispose();
         }
 
         [Fact]

src/libraries/System.IO.FileSystem/tests/Directory/Delete.cs

@@ -3,6 +3,7 @@
 
 using System.Text;
 using Xunit;
+using Microsoft.DotNet.RemoteExecutor;
 using Microsoft.DotNet.XUnitExtensions;
 
 namespace System.IO.Tests
@@ -13,6 +14,10 @@ public class Directory_Delete_str : FileSystemTest
 
         static bool IsBindMountSupportedAndOnUnixAndSuperUser => IsBindMountSupported && PlatformDetection.IsUnixAndSuperUser;
 
+        static bool IsRemoteExecutorSupportedAndUsingNewNormalization => RemoteExecutor.IsSupported && UsingNewNormalization;
+
+        static bool IsRemoteExecutorSupportedAndLongPathsAreNotBlockedAndUsingNewNormalization => RemoteExecutor.IsSupported && LongPathsAreNotBlocked && UsingNewNormalization;
+
         #region Utilities
 
         protected virtual void Delete(string path)
@@ -121,23 +126,29 @@ public void DeletingSymLinkDoesntDeleteTarget()
             Assert.False(Directory.Exists(linkPath), "linkPath should no longer exist");
         }
 
-        [ConditionalFact(nameof(UsingNewNormalization))]
-        [ActiveIssue("https://github.com/dotnet/runtime/issues/67853", TestPlatforms.iOS | TestPlatforms.tvOS)]
+        [ConditionalFact(nameof(IsRemoteExecutorSupportedAndUsingNewNormalization))]
         public void ExtendedDirectoryWithSubdirectories()
         {
-            DirectoryInfo testDir = Directory.CreateDirectory(IOInputs.ExtendedPrefix + GetTestFilePath());
-            testDir.CreateSubdirectory(GetTestFileName());
-            Assert.Throws<IOException>(() => Delete(testDir.FullName));
-            Assert.True(testDir.Exists);
+            RemoteExecutor.Invoke(() =>
+            {
+                Directory.SetCurrentDirectory(Path.GetTempPath());
+                DirectoryInfo testDir = Directory.CreateDirectory(IOInputs.ExtendedPrefix + GetTestFilePath());
+                testDir.CreateSubdirectory(GetTestFileName());
+                Assert.Throws<IOException>(() => Delete(testDir.FullName));
+                Assert.True(testDir.Exists);
+            }).Dispose();
         }
 
-        [ConditionalFact(nameof(LongPathsAreNotBlocked), nameof(UsingNewNormalization))]
-        [ActiveIssue("https://github.com/dotnet/runtime/issues/67853", TestPlatforms.iOS | TestPlatforms.tvOS)]
+        [ConditionalFact(nameof(IsRemoteExecutorSupportedAndLongPathsAreNotBlockedAndUsingNewNormalization))]
         public void LongPathExtendedDirectory()
         {
-            DirectoryInfo testDir = Directory.CreateDirectory(IOServices.GetPath(IOInputs.ExtendedPrefix + TestDirectory, characterCount: 500));
-            Delete(testDir.FullName);
-            Assert.False(testDir.Exists);
+            RemoteExecutor.Invoke(() =>
+            {
+                Directory.SetCurrentDirectory(Path.GetTempPath());
+                DirectoryInfo testDir = Directory.CreateDirectory(IOServices.GetPath(IOInputs.ExtendedPrefix + TestDirectory, characterCount: 500));
+                Delete(testDir.FullName);
+                Assert.False(testDir.Exists);
+            }).Dispose();
         }
 
         #endregion

src/libraries/System.IO.FileSystem/tests/Directory/Exists.cs

@@ -393,8 +393,7 @@ public void ExtendedPathAlreadyExistsAsFile()
         }
 
         [Fact]
-        [PlatformSpecific(TestPlatforms.AnyUnix & ~TestPlatforms.Browser)]  // Makes call to native code (libc)
-        [ActiveIssue("https://github.com/dotnet/runtime/issues/67853", TestPlatforms.iOS | TestPlatforms.tvOS)]
+        [PlatformSpecific(TestPlatforms.AnyUnix & ~TestPlatforms.Browser & ~TestPlatforms.iOS & ~TestPlatforms.tvOS)]  // Makes call to native code (libc)
         public void FalseForNonRegularFile()
         {
             string fileName = GetTestFilePath();

src/libraries/System.IO.FileSystem/tests/DirectoryInfo/Exists.cs

@@ -108,8 +108,7 @@ public void FalseForFile()
         }
 
         [Fact]
-        [PlatformSpecific(TestPlatforms.AnyUnix & ~TestPlatforms.Browser)]  // Uses P/Invokes
-        [ActiveIssue("https://github.com/dotnet/runtime/issues/67853", TestPlatforms.iOS | TestPlatforms.tvOS)]
+        [PlatformSpecific(TestPlatforms.AnyUnix & ~TestPlatforms.Browser & ~TestPlatforms.iOS & ~TestPlatforms.tvOS)]  // Uses P/Invokes
         public void FalseForNonRegularFile()
         {
             string fileName = GetTestFilePath();

src/libraries/System.IO.FileSystem/tests/File/Exists.cs

@@ -254,8 +254,7 @@ public void PathAlreadyExistsAsDirectory()
         }
 
         [Fact]
-        [PlatformSpecific(TestPlatforms.AnyUnix & ~TestPlatforms.Browser)]  // Uses P/Invokes
-        [ActiveIssue("https://github.com/dotnet/runtime/issues/67853", TestPlatforms.iOS | TestPlatforms.tvOS)]
+        [PlatformSpecific(TestPlatforms.AnyUnix & ~TestPlatforms.Browser & ~TestPlatforms.iOS & ~TestPlatforms.tvOS)]  // Uses P/Invokes
         public void FalseForNonRegularFile()
         {
             string fileName = GetTestFilePath();

src/libraries/System.IO.FileSystem/tests/File/ReadWriteAllBytes.cs

@@ -193,8 +193,7 @@ static async Task WaitConnectionAndWritePipeStreamAsync(NamedPipeServerStream na
         }
 
         [Fact]
-        [PlatformSpecific(TestPlatforms.AnyUnix & ~TestPlatforms.Browser)]
-        [ActiveIssue("https://github.com/dotnet/runtime/issues/67853", TestPlatforms.iOS | TestPlatforms.tvOS)]
+        [PlatformSpecific(TestPlatforms.AnyUnix & ~TestPlatforms.Browser & ~TestPlatforms.iOS & ~TestPlatforms.tvOS)]
         public async Task ReadAllBytes_NonSeekableFileStream_InUnix()
         {
             string fifoPath = GetTestFilePath();

src/libraries/System.IO.FileSystem/tests/File/ReadWriteAllBytesAsync.cs

@@ -203,8 +203,7 @@ static async Task WaitConnectionAndWritePipeStreamAsync(NamedPipeServerStream na
         }
 
         [Fact]
-        [PlatformSpecific(TestPlatforms.AnyUnix & ~TestPlatforms.Browser)]
-        [ActiveIssue("https://github.com/dotnet/runtime/issues/67853", TestPlatforms.iOS | TestPlatforms.tvOS)]
+        [PlatformSpecific(TestPlatforms.AnyUnix & ~TestPlatforms.Browser & ~TestPlatforms.iOS & ~TestPlatforms.tvOS)]
         public async Task ReadAllBytesAsync_NonSeekableFileStream_InUnix()
         {
             string fifoPath = GetTestFilePath();

src/libraries/System.IO.FileSystem/tests/FileInfo/Exists.cs

@@ -89,8 +89,7 @@ public void FalseForDirectory()
         }
 
         [Fact]
-        [PlatformSpecific(TestPlatforms.AnyUnix & ~TestPlatforms.Browser)]  // Uses P/Invokes
-        [ActiveIssue("https://github.com/dotnet/runtime/issues/67853", TestPlatforms.iOS | TestPlatforms.tvOS)]
+        [PlatformSpecific(TestPlatforms.AnyUnix & ~TestPlatforms.Browser & ~TestPlatforms.iOS & ~TestPlatforms.tvOS)]  // Uses P/Invokes
         public void TrueForNonRegularFile()
         {
             string fileName = GetTestFilePath();

src/libraries/System.IO.FileSystem/tests/Path/Exists_File.cs

@@ -21,8 +21,7 @@ public void PathAlreadyExistsAsDirectory()
         }
 
         [Fact]
-        [PlatformSpecific(TestPlatforms.AnyUnix & ~TestPlatforms.Browser)]  // Uses P/Invokes
-        [ActiveIssue("https://github.com/dotnet/runtime/issues/67853", TestPlatforms.iOS | TestPlatforms.tvOS)]
+        [PlatformSpecific(TestPlatforms.AnyUnix & ~TestPlatforms.Browser & ~TestPlatforms.iOS & ~TestPlatforms.tvOS)]  // Uses P/Invokes
         public void TrueForNonRegularFile()
         {
             string fileName = GetTestFilePath();