Time delta calculation bug when both start and end times are after hours

[brox]

This piece of code returns the wrong time delta:

>>> bt=BusinessTime()
>>> bt.businesstimedelta(datetime(2016, 6, 17, 18), datetime(2016, 6, 20, 18))
datetime.timedelta(0)

The start time is after hours on a Friday at 6pm, while the end time is after hours on the following Monday at 6pm. The correct answer should be datetime.timedelta(1), right?

[flc]

assuming bt.business_hours is (datetime.time(9, 0), datetime.time(17, 0)) and bt.weekends is (5, 6)shouldn't this be equal to bt.businesstimedelta(datetime.datetime(2016, 6, 20, 9, 0), datetime.datetime(2016, 6, 20, 17, 0)) ?
which is:
datetime.timedelta(0, 28800)

[josegonzalez]

Closed by #22