public void OrderProductNumber_IsReturned_WhenOrderDetailsAdded()
{
//Arrange
OrderFunctionality o10 = new OrderFunctionality();
OrderDetails od3 = new OrderDetails("REF-000-000-01", "REF-000-001", "P0000", 1);
o10.NewOrderDetails(od3);
//Act
int i = o10.OrderProducts("REF-000-000-01");
//Assert
Assert.AreEqual(o10.OrderProductNumber(i), "P0000");
}