Bundler has a nice subcommands for setting up a new gem. Setting up a test framework depends on which one you pick. The big switch from rails is that you get to

Bundler has a nice subcommands for setting up a new gem. Setting up a test framework depends on which one you pick. The big switch from rails is that you get to decide where everything goes. I suggest looking at some recently created gems by prolific rubyists to get a feel for the structure.