public void ValidCreation()
{
List <string> list = new List <string>();
list.Add("create_product");
list.Add("P1");
list.Add("100");
list.Add("1000");
string response = _createProductHandler.Execute(list);
Console.WriteLine(response);
Assert.AreEqual(response, "Product created; code P1, price 100, stock 1000");
}