def test_order_by_params_invalid_fields(self):
"""Test parse of order_by params for invalid fields."""
order_params = {'cost': 'asc', 'invalid': 'param'}
serializer = OrderBySerializer(data=order_params)
with self.assertRaises(serializers.ValidationError):
serializer.is_valid(raise_exception=True)
def test_parse_order_by_params_success(self):
"""Test parse of a order_by param successfully."""
order_params = {'project': 'asc'}
serializer = OrderBySerializer(data=order_params)
self.assertTrue(serializer.is_valid())