def test_double_booked():
dates = [{'start': '2016-06-01', 'end': '2016-06-15'}, {'start': '2016-06-14', 'end': '2016-06-29'}]
b = RoomBooking(dates)
assert set([d for d in b.double_booked_days()]) == set(['2016-06-14', '2016-06-15'])
def test_availability():
dates = [{'start': '2016-06-01', 'end': '2016-06-15'}, {'start': '2016-07-01', 'end': '2016-07-15'},
{'start': '2016-06-20', 'end': '2016-06-29'}]
b = RoomBooking(dates)
assert [d for d in b.availability(6)] == ['2016-06-16', '2016-06-17', '2016-06-18', '2016-06-19', '2016-06-30']