System.IO.Abstractions usage

Question

I'm writing some unit tests using System.IO.Abstractions following the sample code in GitHub and got stuck here:

fileSystem: new FileSystem() //use default implementation which calls System.IO

This line is meant to initialise System.IO.FileSystem but that class does not exist... do you know if it has been deprecated or am I getting this wrong?

Thanks!

Solution

yes, in the production code, you should inject an instance of System.IO.Abstractions.FileSystem. In your test code an instance of System.IO.Abstractions.TestingHelpers.MockFileSystem.