public void CustomerPostcode_IsReturned_WhenOrderAdded()
        {
            //Arrange
            OrderFunctionality o9 = new OrderFunctionality();
            Order o3 = new Order("REF-000-001", "test", "name", "1 High St", "town", "county", "BT71AA", "01/03/2020");

            o9.NewOrder(o3);

            //Act
            int i = o9.OrderInformation("REF-000-001");

            //Assert
            Assert.AreEqual(o9.OrderPostcode(i), "BT71AA");
        }