def test_escrita_campo_num_int(self):
        # aceitar somente inteiros (int e long)
        with self.assertRaises(errors.TipoError):
            self.header_arquivo.controle_banco = 10.0
        with self.assertRaises(errors.TipoError):
            self.header_arquivo.controle_banco = ''

        # verifica se o numero de digitos esta sendo verificado
        with self.assertRaises(errors.NumDigitosExcedidoError):
            self.header_arquivo.controle_banco = 12345678234567890234567890
        with self.assertRaises(errors.NumDigitosExcedidoError):
            self.header_arquivo.controle_banco = 1234

        # verifica valor armazenado
        self.header_arquivo.controle_banco = 5
        self.assertEqual(self.header_arquivo.controle_banco, 5)
def operations_client(self) -> operations_v1.OperationsClient:
        """Create the client designed to process long-running operations.

        This property caches on the instance; repeated calls return the same
        client.
        """
        # Quick check: Only create a new client if we do not already have one.
        if self._operations_client is None:
            self._operations_client = operations_v1.OperationsClient(self.grpc_channel)

        # Return the client from cache.
        return self._operations_client