require 'test_helper'

class CartTest < ActiveSupport::TestCase
  fixtures :products

  def setup
    @cart  = Cart.new
    @rails = products(:rails_book)
    @ruby  = products(:ruby_book)
  end
  
  test "add unique products" do
    @cart.add_product @rails
    @cart.add_product @ruby
    assert_equal 2, @cart.items.size
    assert_equal @rails.price + @ruby.price, @cart.total_price
  end

  test "add duplicate product" do
    @cart.add_product @rails
    @cart.add_product @rails
    assert_equal 2*@rails.price, @cart.total_price
    assert_equal 1, @cart.items.size
    assert_equal 2, @cart.items[0].quantity
  end 
end