def test_escrita_campo_alfa(self):
        # Testa que serao aceitos apenas unicode objects
        with self.assertRaises(errors.TipoError):
            self.header_arquivo.cedente_nome = 'tracy'

        # Testa que strings mais longas que obj.digitos nao serao aceitas
        with self.assertRaises(errors.NumDigitosExcedidoError):
            self.header_arquivo.cedente_convenio = '123456789012345678901'

        # Testa que o valor atribuido foi guardado no objeto
        self.header_arquivo.cedente_nome = 'tracy'
        self.assertEqual(self.header_arquivo.cedente_nome, 'tracy')
def __init__(self, cost_withGradients):
        super(CostModel, self).__init__()

        self.cost_type = cost_withGradients

        # --- Set-up evaluation cost
        if self.cost_type is None:
            self.cost_withGradients = constant_cost_withGradients
            self.cost_type = 'Constant cost'

        elif self.cost_type == 'evaluation_time':
            self.cost_model = GPModel()
            self.cost_withGradients = self._cost_gp_withGradients
            self.num_updates = 0
        else:
            self.cost_withGradients = cost_withGradients
            self.cost_type = 'User defined cost'