[TestMethod()]//Check if it returns a list of customers.
        public void GetCustomersListTestToCheckIfItReturnsListOfCustomers()
        {
            //Arrange
            var AccountInfo = AvaTaxProfileAssistantHelper.InsertAccountInfo(input.AccountCredentials);

            //Act
            var actualResult = AvaTaxProfileAssistantHelper.GetCustomersList(AccountInfo.ID);

            //Assert
            Assert.IsInstanceOfType(actualResult, typeof(List <Customers>), "Incorrect result type returned!!");
        }
        [TestMethod()]//Check if it returns correct number of customers as inserted from xml.
        public void GetCustomersListTestToCheckIfItReturnsCorrectNumberOfCustomers()
        {
            //Arrange
            xmlReader = XmlReader.Create(@"..\XMLTestFiles\TPA_New.xml");
            var tpa        = new TPAScaffold();
            var serializer = new XmlSerializer(tpa.GetType());

            input = (TPAScaffold)serializer.Deserialize(xmlReader);

            var AccountInfo   = AvaTaxProfileAssistantHelper.InsertAccountInfo(input.AccountCredentials);
            var AvaERPSetting = AvaTaxProfileAssistantHelper.InsertAvaERPSetting(input.AvaERPSettings, AccountInfo.ID);


            //Act
            foreach (AvaCustomer cust in input.AvaERPSettings.Customers)
            {
                var actualResult = AvaTaxProfileAssistantHelper.InsertCustomers(cust, AccountInfo.ID, AvaERPSetting);
            }

            var Result = AvaTaxProfileAssistantHelper.GetCustomersList(AccountInfo.ID);

            Assert.AreEqual(Result.Count, input.AvaERPSettings.Customers.Count, "Incorrect number of customers returned!!");
        }