class TaskURLTests(TestCase):

    @classmethod

    def setUpClass(cls):

        super().setUpClass()

    def setUp(self):

        self.guest_client = Client()

def test_url(self):

     json_data = {

         "model": "X5",

         "version": "LT",

         ...

     }

     response  = self.guest_client.post('/add_robot/',

                                        data= json.dumps(json_data),

                                        content_type='application/json')