def test_set_volume_quantity_one(self):
terminal = PointOfSaleTerminal()
terminal.set_volume_price("A", 1.0, 1)
product = terminal.available_products.get_product("A")
self.assertEqual(product.volume_price, None)
self.assertEqual(product.retail_price.value, 1.0)
def set_pricing(terminal: PointOfSaleTerminal):
terminal.set_retail_price("A", 1.25)
terminal.set_volume_price("A", 3.0, 3)
terminal.set_retail_price("B", 4.25)
terminal.set_retail_price("C", 1.0)
terminal.set_volume_price("C", 5.0, 6)
terminal.set_retail_price("D", 0.75)