docs: def alwaysThrew(self, error_type=None): #pylint: disable=invalid-name
          """
          Determining whether the specified exception is the ONLY thrown exception
          Args:
              error_type:
                  None: checking without specified exception
                  Specified Exception
          Return: Boolean
          """
          if self.callCount == 0:
              return False
          if not error_type:
              return True if len(self.exceptions) == self.callCount else False
          else:
              return uch.obj_in_list_always(self.exceptions, error_type)