gds_spec.rb

require 'rspec'
require_relative 'checkout'
require_relative 'item'

describe Checkout do

  subject { described_class.new({bogof: ['FR1']}) }

  it '#item' do
    expect(subject.item('FR1')[:price]).to eq(311)
  end

  it '#scan' do
    expect(subject.basket).to be_empty
    subject.scan('FR1')
    expect(subject.basket).to include({ code: 'FR1', name: 'Fruit Tea', price: 311 })
  end

  it '#total' do
    subject.scan('FR1')
    expect(subject.total).to eq(311)
    subject.scan('FR1')
    expect(subject.total).to eq(311)
    subject.scan('CF1')
    expect(subject.total).to eq(311 + 1123)
  end


end