fix: enumerate directories with trailing slash (#803)

This PR ensures that directories with trailing slashes are properly enumerated.
- Adds logic to trim trailing directory separators before calling `GetFileName` in enumeration
- Includes a test case to verify empty directories with trailing slashes are properly enumerated

Author: vbreuss

Source/Testably.Abstractions.Testing/Storage/InMemoryStorage.cs

@@ -252,7 +252,13 @@ public IEnumerable<IStorageLocation> EnumerateLocations(
 			if (type.HasFlag(item.Value.Type) &&
 			    IncludeItemInEnumeration(item, fullPathWithoutTrailingSlash, enumerationOptions))
 			{
-				string name = _fileSystem.Execute.Path.GetFileName(item.Key.FullPath);
+				string? itemPath = item.Key.FullPath;
+				if (itemPath.EndsWith(_fileSystem.Path.DirectorySeparatorChar))
+				{
+					itemPath = itemPath.TrimEnd(_fileSystem.Path.DirectorySeparatorChar);
+				}
+
+				string name = _fileSystem.Execute.Path.GetFileName(itemPath);
 				if (EnumerationOptionsHelper.MatchesPattern(
 					    _fileSystem.Execute,
 					    enumerationOptions,
@@ -967,9 +973,8 @@ private bool IncludeItemInEnumeration(
 						sourceContainer.Attributes |= FileAttributes.Archive;
 					}
 
-					rollbacks?.Add(new Rollback(
-						() => MoveInternal(destination, source, true, false,
-							sourceType)));
+					rollbacks?.Add(new Rollback(() => MoveInternal(destination, source, true, false,
+						sourceType)));
 					_fileSystem.ChangeHandler.NotifyCompletedChange(fileSystemChange);
 					return destination;
 				}

Tests/Testably.Abstractions.Tests/FileSystem/Directory/EnumerateDirectoriesTests.cs

@@ -181,6 +181,18 @@ await That(result).HasSingle().Which.EndsWith(extension)
 		}
 	}
 
+	[Fact]
+	public async Task EnumerateDirectories_ShouldIncludeEmptyDirectoriesWithTrailingSlash()
+	{
+		string rootDirectory = "RootDir";
+		string emptyDirectory = FileSystem.Path.Combine(rootDirectory, "EmptyDir") + FileSystem.Path.DirectorySeparatorChar;
+
+		FileSystem.Directory.CreateDirectory(emptyDirectory);
+
+		await That(FileSystem.Directory.Exists(emptyDirectory)).IsTrue();
+		await That(FileSystem.Directory.EnumerateDirectories(rootDirectory)).HasCount(1);
+	}
+
 	[Fact]
 	public async Task EnumerateDirectories_ShouldSupportExtendedLengthPaths1()
 	{