def test4():
"Calculate time to wait between now and some later departure time."
now = datetime.datetime(2012, 1, 1, 18, 0, 0)
dep = datetime.datetime(2012, 1, 1, 18, 2, 0)
wait = vbbvg.wait_time(dep.strftime('%H:%M'), now=now)
assert wait == '02:00'
def test6():
"Calculate time to wait between now and some later departure time."
now = datetime.datetime(2012, 1, 1, 18, 30, 30)
dep = datetime.datetime(2012, 1, 1, 19, 45, 0)
wait = vbbvg.wait_time(dep.strftime('%H:%M'), now=now)
assert wait == '01:14:30'
def test3():
"Calculate time to wait between now and some later departure time."
delta_secs = 10
now = datetime.datetime(2012, 1, 1, 18, 0, 0)
dep = datetime.datetime(2012, 1, 1, 18, 0, delta_secs)
wait = vbbvg.wait_time(dep.strftime('%H:%M'), now=now)
assert wait == '00:00'