gistfile1.rb

require 'spec_helper'

describe Promotion::Rules::OnePerUser do
  let(:rule) { Promotion::Rules::OnePerUser.new }
  let(:user) { mock_model(User) }
  let(:order) { mock_model(Order, :user => user) }
  
  describe "the arel expression" do
    before do
      PromotionCredit.stub_chain('includes.where')
    end
    
    it "limits by promotion credit id" do
      promotion_id = 5
      rule.stubs(:promotion_id => promotion_id)
      
      table = PromotionCredit.arel_table
      table.expects(:[]).with(:source_id)
      table[:source_id].expects(:eq).with(promotion_id)
    
      rule.used_promotion_credits(order)
    end
  end
end