fix: share one cached state across FileSystemInfo properties like the real file system

Source/Testably.Abstractions.Testing/FileSystem/DirectoryInfoMock.cs

@@ -35,7 +35,7 @@ public override bool Exists
 				.DirectoryInfo.RegisterPathProperty(Location.FullPath,
 					nameof(Exists), PropertyAccess.Get);
 
-			return base.Exists && FileSystemType == FileSystemTypes.Directory;
+			return base.Exists && State.Type == FileSystemTypes.Directory;
 		}
 	}
 
@@ -158,7 +158,7 @@ public IEnumerable<IDirectoryInfo> EnumerateDirectories(
 				FullName,
 				searchPattern,
 				EnumerationOptionsHelper.FromSearchOption(searchOption))
-			.Select(location => New(location, _fileSystem));
+			.Select(location => WithInitializedState(New(location, _fileSystem)));
 	}
 
 #if FEATURE_FILESYSTEM_ENUMERATION_OPTIONS
@@ -175,7 +175,7 @@ public IEnumerable<IDirectoryInfo> EnumerateDirectories(
 				FullName,
 				searchPattern,
 				enumerationOptions)
-			.Select(location => New(location, _fileSystem));
+			.Select(location => WithInitializedState(New(location, _fileSystem)));
 	}
 #endif
 
@@ -212,7 +212,7 @@ public IEnumerable<IFileInfo> EnumerateFiles(
 				FullName,
 				searchPattern,
 				EnumerationOptionsHelper.FromSearchOption(searchOption))
-			.Select(location => FileInfoMock.New(location, _fileSystem));
+			.Select(location => WithInitializedState(FileInfoMock.New(location, _fileSystem)));
 	}
 
 #if FEATURE_FILESYSTEM_ENUMERATION_OPTIONS
@@ -228,7 +228,7 @@ public IEnumerable<IFileInfo> EnumerateFiles(
 				FullName,
 				searchPattern,
 				enumerationOptions)
-			.Select(location => FileInfoMock.New(location, _fileSystem));
+			.Select(location => WithInitializedState(FileInfoMock.New(location, _fileSystem)));
 	}
 #endif
 
@@ -266,7 +266,7 @@ public IEnumerable<IFileSystemInfo> EnumerateFileSystemInfos(
 				FullName,
 				searchPattern,
 				EnumerationOptionsHelper.FromSearchOption(searchOption))
-			.Select(location => FileSystemInfoMock.New(location, _fileSystem));
+			.Select(location => WithInitializedState(FileSystemInfoMock.New(location, _fileSystem)));
 	}
 
 #if FEATURE_FILESYSTEM_ENUMERATION_OPTIONS
@@ -283,7 +283,7 @@ public IEnumerable<IFileSystemInfo> EnumerateFileSystemInfos(
 				FullName,
 				searchPattern,
 				enumerationOptions)
-			.Select(location => FileSystemInfoMock.New(location, _fileSystem));
+			.Select(location => WithInitializedState(FileSystemInfoMock.New(location, _fileSystem)));
 	}
 #endif
 
@@ -431,6 +431,7 @@ public void MoveTo(string destDirName)
 				           .EnsureValidFormat(_fileSystem, nameof(destDirName))),
 			           recursive: true)
 		           ?? throw ExceptionFactory.DirectoryNotFound(FullName);
+		ResetCache(true);
 	}
 
 	#endregion
@@ -447,6 +448,13 @@ public void MoveTo(string destDirName)
 		return new DirectoryInfoMock(location, fileSystem);
 	}
 
+	private static T WithInitializedState<T>(T fileSystemInfo)
+		where T : FileSystemInfoMock
+	{
+		fileSystemInfo.InitializeState();
+		return fileSystemInfo;
+	}
+
 	private IEnumerable<IStorageLocation> EnumerateInternal(
 		FileSystemTypes fileSystemTypes,
 		string path,

Source/Testably.Abstractions.Testing/FileSystem/FileInfoMock.cs

@@ -60,7 +60,7 @@ public override bool Exists
 				.FileInfo.RegisterPathProperty(Location.FullPath,
 					nameof(Exists), PropertyAccess.Get);
 
-			return base.Exists && FileSystemType == FileSystemTypes.File;
+			return base.Exists && State.Type == FileSystemTypes.File;
 		}
 	}
 
@@ -101,16 +101,15 @@ public long Length
 				.FileInfo.RegisterPathProperty(Location.FullPath,
 					nameof(Length), PropertyAccess.Get);
 
-			if (Container is NullContainer ||
-			    Container.Type != FileSystemTypes.File)
+			if (!State.Exists || State.Type != FileSystemTypes.File)
 			{
 				throw ExceptionFactory.FileNotFound(
 					_fileSystem.Execute.IsNetFramework
 						? Location.FriendlyName
 						: Location.FullPath);
 			}
 
-			return Container.GetBytes().Length;
+			return State.Length;
 		}
 	}
 
@@ -138,7 +137,11 @@ public StreamWriter AppendText()
 		using IDisposable registration = _fileSystem.StatisticsRegistration
 			.FileInfo.RegisterPathMethod(Location.FullPath, nameof(AppendText));
 
-		return new StreamWriter(Open(FileMode.Append, FileAccess.Write));
+		StreamWriter streamWriter = new(Open(FileMode.Append, FileAccess.Write));
+#if NET8_0_OR_GREATER
+		ResetCache(true);
+#endif
+		return streamWriter;
 	}
 
 	/// <inheritdoc cref="IFileInfo.CopyTo(string)" />
@@ -179,12 +182,9 @@ public FileSystemStream Create()
 		using IDisposable registration = _fileSystem.StatisticsRegistration
 			.FileInfo.RegisterPathMethod(Location.FullPath, nameof(Create));
 
-		if (!_fileSystem.Execute.IsNetFramework)
-		{
-			Refresh();
-		}
-
-		return _fileSystem.File.Create(FullName);
+		FileSystemStream stream = _fileSystem.File.Create(FullName);
+		ResetCache(!_fileSystem.Execute.IsNetFramework);
+		return stream;
 	}
 
 	/// <inheritdoc cref="IFileInfo.CreateText()" />
@@ -195,7 +195,7 @@ public StreamWriter CreateText()
 
 		StreamWriter streamWriter = new(_fileSystem.File.Create(FullName));
 #if NET8_0_OR_GREATER
-		Refresh();
+		ResetCache(true);
 #endif
 		return streamWriter;
 	}
@@ -232,6 +232,7 @@ public void MoveTo(string destFileName)
 			           _fileSystem.Storage.GetLocation(destFileName
 				           .EnsureValidArgument(_fileSystem, nameof(destFileName))))
 		           ?? throw ExceptionFactory.FileNotFound(FullName);
+		ResetCache(true);
 	}
 
 #if FEATURE_FILE_MOVETO_OVERWRITE
@@ -248,6 +249,7 @@ public void MoveTo(string destFileName, bool overwrite)
 				           .EnsureValidArgument(_fileSystem, nameof(destFileName))),
 			           overwrite)
 		           ?? throw ExceptionFactory.FileNotFound(FullName);
+		ResetCache(true);
 	}
 #endif