paramtest fails for parameters with valid None or empty string values

[lewkoo]

What did you try?
Tried to test a parameter with an empty value using paramtest node.

What did you observe?
Test timed out

What did you expect?
Test succeeded

All said?

When using paramtest node to test existence / correctness of a value of a parameter in a parameter server, the test will not finish for parameters which have a valid value of None or are just empty.

In paramtest the condition is specified as while not param_obtained but it will also evaluate to True if param_obtained is an empty string and sometimes that is a correct parameter value.

Solution: Replace while not param_obtained with while param_obtained is None.