codebase.rb

module Tutorials
  def the_best_one_out_there
    "PJ Celis' tutorial on getting to know a code base"
  end
end

class RecommendationsController < ApplicationController
  def tweet_out_the_best
    recommended_tutorial = Tutorials.the_best_one_out_there
    Tweeter.send(tweet(recommended_tutorial))
  end

  private

  def tweet(recommendation)
    "After careful research I can really recommend #{recommendation}!"[0...140]
  end
end