MockDirectory.GetParent() throws NullReference on Linux

[peter-sereda]

Please consider the following code:
var fileSystem = new MockFileSystem(); var path = XFS.Path("C:\\test.txt"); DirectoryInfoBase dir = fileSystem.Directory.GetParent(path);

It works ok on Windows but throws NullReferenceException on Linux. I believe this is a bug.

As a workaround, one may add an intermediate folder to the path. fileSystem.Directory.GetParent("c:\\temp\\test.txt"); gonna work ok.

[peter-sereda]

@fgreinacher , sorry, my mistake in description. The code snippet above does not throw exception, but instead it works differently on windows and Linux. It returns a DirectoryInfoBase with "c:\" on windows and NULL on Linux.

Standard behavior of .NET Core for Directory.GetParent(@"c:\temp.txt"); is to return "C:\". I believe we need to fix Linux implementation for MockDirectory to return the same. What do you think?

[fgreinacher]

@peter-sereda Sorry for not answering the question. Yes, I think we should try to mirror .NET Core behavior.

[peter-sereda]

Ok, will do.