class CartItem
    include Reloadable

    attr_reader :serving, :quantity

    def initialize(serving)
        @serving = serving
        @quantity = 1
    end

    def increment_quantity
        @quantity += 1
    end

    def name
        @serving.item.name
    end

    def size
        @serving.size.name
    end

    def price
        @serving.price * @quantity
    end

    def total_price
        @items.inject(0) { |sum, line_item| sum + line_item.price }
    end

end