Hi Jukka,

 >>
>> Then test this functionality in the unit test.  If you're relying on
>> semi-manual tests for this stuff, your test coverage will be pretty small.
>>
>
> But don't we want to test this against dbus-daemon? Testing this watch
> API without dbus-daemon interaction seems pointless to me.

Why?  In this case, what's the difference between getting a signal from 
DBus Daemon vs simply making one up yourself?  Isolating the code and 
unit testing the hell out of it is much simpler without dbus-daemon 
involved.  Much faster and more compact too.

Regards,
-Denis