СХЕМА (SchemaRubricators.json)
{
   "type":"array",
   "properties":{
      "alias":{
         "type":"string"
      },
      "description":{
         "type":"string"
      },
      "id":{
         "type":"number"
      }
   }
}
class ApiTesting(unittest.TestCase):
    api = ApiClient()

    def validate_schema(self, schema, result):
        with open(schema) as data_file:
            schema = json.load(data_file)

            Draft4Validator(schema).validate(result)

    def test_get_rubricators_list(self):
        result = self.api.get('rubricators')['result']

        self.validate_schema('SchemaRubricators.json', result)