def test_monthlist_nextweek():
start = '2017-01-09'
end = '2018-12-27'
p = Prices()
months = [p.next_weekday(x) for x in p.monthlist([start, end])]
assert len(months) == 24
def test_monthlist():
start = '2017-01-09'
end = '2018-12-27'
p = Prices()
months = p.monthlist([start, end])
assert len(months) == 24