public string SaveTestType(Test aTest)
      {
          bool typeExists = atestGateway.IsTestTypeExists(aTest);

          if (typeExists == true)
          {
              return("Test Type Already Exists.Try It With a New One");
          }

          else
          {
              int rowAffected = atestGateway.SaveTestType(aTest);
              if (rowAffected > 0)
              {
                  return("Successfully Saved");
              }
              else
              {
                  return("Not SuccessFully Saved");
              }
          }
      }