Add this line to your application's Gemfile:

gem 'subroutine-factory'

And then execute:

$ bundle

Or install it yourself as:

$ gem install subroutine-factory


The Subroutine gem does a great job of encapsulating your app's business logic. To simplify the usage of Subroutine Ops in your test suite, utilize the subroutine-factory gem.

Defining factories:

Subroutine::Factory.define :signup do
  op ::SignupOp

  inputs :email, sequence{|n| "foo{n}" }
  inputs :password, "password123"

  # by default, the op will be returned when the factory is used.
  # this `output` returns the value of the accessor on the resulting op
  output :user

Subroutine::Factory.define :business_signup do

  # all configurations are inherited from the "signup" factory
  parent :signup

  op ::BusinessSignupOp

  input :business_name, sequence{|n| "Business #{n}" }

  # you can output multiple things into a hash by using `outputs`
  outputs :user, :business

Using Factories:

user = Subroutine::Factory.create :signup
user = Subroutine::Factory.create :signup, email: "[email protected]"

out = Subroutine::Factory.create :business_signup
out[:user] #=> User{}
out[:business] #=> Business{}

Spec / Test Helper:

#spec_helper.rb, test_helper.rb
config.include ::Subroutine::Factory::SpecHelper

# in your tests
user = factory(:signup)


After checking out the repo, run bin/setup to install dependencies. Then, run rake test to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to


Bug reports and pull requests are welcome on GitHub at


The gem is available as open source under the terms of the MIT License.