Quick replies :
- pyros-test is MIT or BSD, along these lines, I just haven’t taken the time to put a file there… I ll try to do it soon.
- python makes things simpler than C++ as there are defacto standard test frameworks. So I am trying to support whatever basic python and ROS support ( unittest, doctest, and nose ) and pytest. unittest already includes a mock library by the way in python3, which is just the mock library in python2 .
- pyros-test is currently very very simple (probably too simple to need a separate package), and I’d like to eventually improve it when I get the chance…
But IMHO you re probably better of extracting what I already started in https://github.com/pyros-dev/pyros-msgs and https://github.com/pyros-dev/pyros-schemas : have a look at property based testing and hypothesis, it should be simple enough to automatically generate fake nodes based on an existing message definition and then send fake messages around 
.
Some example of hypothesis use here : https://github.com/pyros-dev/pyros-schemas/blob/nested_merged/tests/test_pyros_schemas/hypothesis_example.py and an example of generating messages with it there https://github.com/pyros-dev/pyros-schemas/blob/nested_merged/tests/test_pyros_schemas/test_basic_fields.py
By the way, roschaos looks fun, and there is probably a clever way to integrate it with roslaunch or feed it launch/test files… I ll play with it when I get some time.