Mokei is a builder library for Rails applications. It is mainly intended for use in test.

Add this line to your application's Gemfile:

gem 'mokei'

And then execute:

$ bundle

Or install it yourself as:

$ gem install mokei

# migration file
ActiveRecord::Schema.define do
  create_table :users, force: true do |t|
    t.string :name
    t.string :email
    t.boolean :active, default: false
  end
end

# model
class User < ActiveRecord::Base
end

# builder
# test/builders/user_builder.rb
class UserBuilder < Mokei::Builder::Base
  def dummy
    target.email = "dummy@example.com"
    target.name = "dummy account"
  end
end

user = UserBuilder.new.dummy.build
=> #<User id: nil, name: "dummy account", email: "dummy@example.com", active: false, created_at: nil, updated_at: nil>

By calling the build method you can get the object to build. Within the builder class, you can use the object to be built with target.

Also, the method defined for the builder is chainable.

# builder
# test/builders/user_builder.rb
class UserBuilder < Mokei::Builder::Base
  def dummy
    target.email = "dummy@example.com"
    target.name = "dummy account"
  end

  def registered
    target.active = true
  end
end

user = UserBuilder.new.dummy.registered.build
=> #<User id: nil, name: "dummy account", email: "dummy@example.com", active: true, created_at: nil, updated_at: nil>

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 rubygems.org.

Bug reports and pull requests are welcome on GitHub at https://github.com/y-yagi/mokei. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

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