[IS-05-01] test_24 IndexError: list index out of range

[MichalChomo]

Traceback:

  File "/home/nmos-testing/nmostesting/GenericTest.py", line 155, in execute_test
    self.result.append(method(test))
  File "/home/nmos-testing/nmostesting/suites/IS0501Test.py", line 572, in test_24
    valid2, response2 = self.is05_utils.check_change_transport_param("receiver", self.receivers,
  File "/home/nmos-testing/nmostesting/IS05Utils.py", line 418, in check_change_transport_param
    expected = paramValues[count]
IndexError: list index out of range

I think this is because our implementation currently returns empty list for /x-nmos/connection/v1.1/single/receivers/{receiverId}/constraints/, therefore:

1. generate_destination_ports returns []
2. generate_changeable_param returns []
3. check_change_transport_param tries to get element at index 0, but the list is empty

[garethsb]

Thanks for the report and investigation.

An empty array at /constraints is a valid response per the schema but not actually permitted by the spec which says there must be an array entry corresponding to each leg in the transport_params at /staged and /active.

That said, the testing tool should tell you that, not raise an IndexError. I'm sure you're right that a fix is possible in the functions you mention, to output a proper error for the implementation instead.