def test_leitura_campo_alfa(self):
        self.assertEqual(self.header_arquivo.cedente_nome,
                         'TRACY TECNOLOGIA LTDA ME')
def expiration_datetime(self):
        """Datetime that the verification will expire. """
        days_good_for = settings.VERIFY_STUDENT["DAYS_GOOD_FOR"]
        return self.created_at + timedelta(days=days_good_for)