Hello Fernando,
For testing my applications, I personally use the stub/mock from MM git
sources (
https://gitlab.freedesktop.org/mobile-broadband/ModemManager/-/blob/main/tools/test-modemmanager-service.py
).
It is aimed to mock the whole modemmanager process though (not a single
modem device) bu
Fit, not feed of course.
Anyway, if it doesn't fit your needs, you may want to look at this code
anyway and maybe tweak it to add more features.
If you do so, please open a merge request, I'm sure there are people
(including me of course) who are willing to see this modemanager mock
getting better