Using MM without hardware for testing and development

[Martin]

Dears, for development purposes and automated testing, I like to talk to
MM like there were a modem (in my case SMS tx/rx). I wonder, if there is
e.g. a "nomodem" or "dummy" plugin, thats external behaviour is
controlled somehow, e.g. using sockets or dbus. TIA! Martin

PS: Alternatively, dbusmock could emulate the dbus i/f of MM, but it
seemss to have a template only for NM, not MM.