public void GetDebtsByPeriod()
        {
            var res = UserDefinedFunctions.GetDebtsByPeriod("11816105", new DateTime(2004, 12, 1), new DateTime(2016, 10, 1));

            Assert.IsInstanceOfType(res, typeof(IEnumerable));
            Assert.IsTrue((res as DataRowCollection).Count > 1);
        }