Useful files for DCI in ruby

context_helper.rb

# Use as alternative for spec_helper for testing roles, and contexts

rails_root = File.expand_path('../../', __FILE__)
$LOAD_PATH.unshift(rails_root) unless $LOAD_PATH.include?(rails_root)

require 'database_cleaner'

RSpec.configure do |config|
  config.before(:suite) do
    DatabaseCleaner.strategy = :transaction
  end

  config.before(:each) do
    DatabaseCleaner.start
  end

  config.after(:each) do
    DatabaseCleaner.clean
  end
end

require 'active_support/dependencies'
autoload_paths = ActiveSupport::Dependencies.autoload_paths
%w(app/models app/contexts app/roles).each do |path|
  autoload_paths.push(path) unless autoload_paths.include?(path)
end

require 'active_record'

db_yml_file = File.expand_path('config/database.yml')
db_config = YAML.load_file(db_yml_file)
ActiveRecord::Base.establish_connection(db_config['test'])

sample_context.rb

# /app/contexts/sample_context.rb

class SampleContext

  # Expose the 'play' as call and supply the 'props'
  def self.call(user)
    new(user).call
  end

  attr_reader :user, :website

  # Assign all props and provide the actors with their roles
  def initialize(user)
    @user = user
    # user is an actor playing the role of website creator
    @user.extend WebsiteCreator
  end

  # let the play commence
  def call

    @website = @user.create_website
    
    # expose the play so that the altered props can be taken of the stage
    self
  end

end