I'm using Enterprise and according to an editor's note in this article: https://msdn.microsoft.com/en-us/magazine/dn904672.aspx?f=255&MSPPError=-2147217396
The "Smart Unit Tests" were renamed to IntelliTests.
To be honest, for everything I've tried it with, it does little more than create the skeleton signature for the unit tests. It is nice in that it saves you some typing and will create the unit test project for you, But you still have to write the tests yourself.