spec_and_model.rb

#################################### spec/models/episode_spec.rb

require 'spec_helper'

# here is the original description idea before refactoring;
# it works, but can be done in a somewhat cleaner and more Rails-y way below
#
# describe "the show begins" do
#
#   context "the episode starts" do # FYI, context _is_an_alias_ for describe! they work the same!
#     before do
#       @episode = Episode.create(name: "S01-E01")
#       @episode.start
#     end
#
#     it "has associated three judges" do
#       binding.pry
#       expect(@episode).to have(3).judges
#     end
#     it "has associated four chefs" do
#       expect(@episode).to have(4).chefs
#     end
#   end
# end

describe Episode do
  subject { Episode.create(name: "S01-E01") }

  # when we want to signal the beginning of an episode
  # we can call its start method
  describe "#start" do

    it "has associated three judges" do
      expect(subject.start).to have(3).judges
    end
    it "has associated four chefs" do
      expect(subject.start).to have(4).chefs
    end
  end

end

#################################### app/models/episode.rb

class Episode < ActiveRecord::Base
  validates :name, presence: true

  has_many :chefs
  has_and_belongs_to_many :judges

  def start
    4.times do
      self.chefs.create(name: "Ms. Chef")
    end
    3.times do
      self.judges.create(name: "Mr. Judge")
    end
    self
  end
end