class Effective::CartItem

def name
  purchasable&.purchasable_name
end

def price
  if (purchasable.price || 0).kind_of?(Integer)
    purchasable.price || 0
  else
    raise 'expected price to be an Integer representing the number of cents.'
  end
end

def subtotal
  price * quantity
end

def tax_exempt
  purchasable&.tax_exempt || false
end

def to_s
  name || 'New Cart Item'
end