Shorter Active Record validations and associations with RSpec, FactoryGirl, and shoulda support.
There's a good chance the gem at https://rubygems.org/gems/rails_model_stacker will be ahead of the sourceforge code.
Rails >= 5.0.1 Ruby >= 2.3.3 gem 'factory_girl_rails' gem 'shoulda-matchers', git:'https://github.com/thoughtbot/shoulda-matchers.git', branch: 'rails_5'
There's a good chance it works with Rais 4 and older ruby versions, but I have no intention of finding out.
gem 'rails_model_stacker'
config/initializers/<any ruby file> require 'rails_model_stacker/rms'
spec/spec_helper.rb or equivalent require 'rails_model_stacker/spec_stacker' require 'rails_model_stacker/factory_stacker'
rdoc lib http://www.rubydoc.info/gems/rails_model_stacker/