Add a unit test for the new logbook.set_datetime_factory() API
Add a unit test for the new logbook.set_datetime_factory() API

FintanH/logbook,alonho/logbook,Rafiot/logbook,omergertel/logbook,Rafiot/logbook,dommert/logbook,omergertel/logbook,alonho/logbook,pombredanne/logbook,DasIch/logbook,DasIch/logbook,omergertel/logbook,RazerM/logbook,DasIch/logbook,mitsuhiko/logbook,alonho/logbook,Rafiot/logbook