It is a bug:
http://bugzilla.mozilla.org/show_bug.cgi?id=101527
Shane Caraveo wrote:
> Seems I cannot rename directories with the moveTo function on Windows
> (haven't tried other platforms), it copies the directory tree instead.
> Renaming files works fine. Here is sample code to repro via xpcshell.
> Thought I would get comments before posting a bug report.
> Thanks
> Shane Caraveo
> ActiveState
>
>
> var file =
> Components.classes["@mozilla.org/file/local;1"].createInstance(Components.in
> terfaces.nsILocalFile);
>
> // assumes test.txt exists already
> // this WORKS
> var fname = "c:\\temp\\test.txt";
> var newfname = "c:\\temp\\test2.txt";
>
> file.initWithUnicodePath(fname);
> file.moveToUnicode(null, newfname);
>
> // assumes that c:\temp\test directory exists already
> // FAILES to rename directory, COPIES it instead, along with
> files/subdirectories
> var path = "c:\\temp\\test";
> var newname = "c:\\temp\\testing";
> file.initWithUnicodePath(path);
> file.moveToUnicode(null, newname);
>
>
>
>
>
