fsharp/fsharpbinding — pull request #636 by rojepp (2014-07-09 05:07:34+00:00)
Title: Disable the virtual file system when running tests

The VFS is implemented in FCS as a static singleton, hence this ugliness. We want to ensure that the VFS initialisation only occurs once, so it is now lazy.
The tests need to call `MDLanguageService.DisableVirtualFileSystem` before anything reaches `MDLanguageService.Instance` and a language service is created.