Nodejs mock test SDK versin 3+

Ths is a newbie question, there seems to be documentation in previous versions of the nodejs SDK on using couchbase.Mock does this exist in 3? How do I set it up?

What I tried: I tried setting up like in the docs here but I get:

 make test
make: *** No rule to make target `test'.  Stop.

@chaim0m Mock doesnot exist for 3.0 as you can see in 2.x it exists here.

What is the recommended method of mocking then? Also why was it removed?