fake_chargify is a helper for faking web requests and responses to and from the Chargify API. You can test Chargify within your application on a plane now. I am sure that happens all the time.
gem 'fake_chargify' require 'fake_chargify'
Example, in spec_helper.rb
FakeChargify.activate! RSpec.configure do |c| c.before do FakeChargify.clear! end end