How to write nunit testing for this method in mvc

Question

# The controller method 

 

 

public ActionResult TermsandConditionsDeclineValidation(string AccountName)

{

try

{

string strLoanNumber = repository.GetLoanNumber(Session["access_token"].ToString());

int LoanID = repository.GetLoanId(TUtil.CheckString(strLoanNumber, string.Empty), Session["AccountName"].ToString());

int? IsTcAccepted = repository.TermsandConditionsDeclineValidation(TUtil.CheckInt(LoanID, 0));

if (IsTcAccepted == 0 || IsTcAccepted == null)

{

return RedirectToAction("EndSessionPage");

}

else

{

return RedirectToAction("GetClients");

}

}

catch (Exception ex)

{

Log.WriteError(TUtil.GetMethodExceptionContext(AccountName), ex);

return View();

}

}