public IEnumerator <object[]> GetEnumerator()
        {
            yield return(CustomerTestDataHelper.GetUpdateCustomerData(_customer1, _customer1));

            yield return(CustomerTestDataHelper.GetUpdateCustomerData(_customer2, _customer2));

            yield return(CustomerTestDataHelper.GetUpdateCustomerData(_customer3, _customer3));
        }
        public IEnumerator <object[]> GetEnumerator()
        {
            yield return(CustomerTestDataHelper.GetUpdateCustomerData(_customerWithOutPersonalNumberAndFootballTeam, _customerWithOutPersonalNumberAndFootballTeam));

            yield return(CustomerTestDataHelper.GetUpdateCustomerData(_customerIsNull, _customerIsNull));

            yield return(CustomerTestDataHelper.GetUpdateCustomerData(_customerWithOutUniqueFields, _customerWithOutUniqueFields));

            yield return(CustomerTestDataHelper.GetUpdateCustomerData(_customerWithOutInLineAddress, _customerWithOutInLineAddress));

            yield return(CustomerTestDataHelper.GetUpdateCustomerData(_customerWithOutAddress, _customerWithOutAddress));

            yield return(CustomerTestDataHelper.GetUpdateCustomerData(_customerWithOutFirstName, _customerWithOutFirstName));

            yield return(CustomerTestDataHelper.GetUpdateCustomerData(_customerWithOutLastName, _customerWithOutLastName));
        }