Another checkout

checkout.rb

require_relative 'product'

class Checkout
  attr_reader :checkout_items, :products

  def initialize
    @products = Hash.new
    @checkout_items = []

    load_products
  end

  def scan(product_code)
    @checkout_items << product_code
  end

  def total
    total = 0.0

    @checkout_items.each do |product_code|
      product = @products[product_code]
      total += product.price
    end

    total
  end

  private

  def load_products
    checkout_data.each do |product|
      @products[product[0]] = Product.new(product[0], product[1], product[2])
    end
  end

  def checkout_data
    [
     ["FR1", "Fruit tea", 3.11],
     ["SR1", "Strawberries", 5.00]
    ]
  end
end

checkout_spec.rb

require_relative '../lib/checkout'

describe Checkout do
  let(:checkout) { Checkout.new }

  it "should be a checkout" do
    expect(checkout).to be_a Checkout
  end

  context "with one item" do
    before do
      checkout.scan("FR1")
    end

    it "should be able to sum a total" do
      expect(checkout.total).to eq 3.11
    end
  end

  context "with one item" do
    before do
      checkout.scan("SR1")
      checkout.scan("FR1")
    end

    it "should be able to sum a total" do
      expect(checkout.total).to eq 8.11
    end
  end
end

product.rb

class Product
  attr_reader :code, :name, :price

  def initialize(code, name, price)
    @code = code
    @name = name
    @price = price
  end
end