def test_months_in_wrong_order(self):
start = common_timezone.datetime(2014, 11, 1)
end = common_timezone.math(start, operator.sub,
datetime.timedelta(days=33))
count = len(list(common_timezone.monthly_iter(start, end)))
# No error is thrown, and no iteration happens
self.assertEqual(count, 0)
def test_not_crossing_dst(self):
# Test not crossing daylight savings time
delta = datetime.timedelta(days=7)
expected = self.dst_time + delta
outcome = common_timezone.math(self.dst_time, operator.add, delta)
self.assertEqual(expected.replace(tzinfo=None),
outcome.replace(tzinfo=None))
self.assertTrue(common_timezone.is_daylight_savings_time(outcome))
def test_crossing_dst_keep_hour(self):
# Test crossing daylight savings time
delta = datetime.timedelta(days=180)
expected = self.dst_time + delta
outcome = common_timezone.math(self.dst_time,
operator.add,
delta,
keep_hour=True)
self.assertEqual(expected.replace(tzinfo=None),
outcome.replace(tzinfo=None))
self.assertFalse(common_timezone.is_daylight_savings_time(outcome))
def test_crossing_dst_with_hour_delta(self):
# Test crossing daylight savings time with delta that has an hour in it
delta = datetime.timedelta(days=180, hours=2)
expected = self.dst_time - delta
outcome = common_timezone.math(self.dst_time,
operator.sub,
delta,
keep_hour=True)
self.assertEqual(expected.replace(tzinfo=None),
outcome.replace(tzinfo=None))
self.assertFalse(common_timezone.is_daylight_savings_time(outcome))
def test_crossing_dst_default(self):
# Test crossing daylight savings time, hour changes (default behaviour)
delta = datetime.timedelta(days=180)
expected = common_timezone.parse(
'12/27/2014 23:00'
) # Would be 12/27/2014, but normalize subtracts an hour
outcome = common_timezone.math(self.dst_time,
operator.add,
delta,
keep_hour=False)
self.assertEqual(expected.replace(tzinfo=None, hour=expected.hour),
outcome.replace(tzinfo=None))
self.assertFalse(common_timezone.is_daylight_savings_time(outcome))
def test_multiple_months(self):
start = common_timezone.datetime(2014, 11, 1)
end = common_timezone.math(start, operator.add,
datetime.timedelta(days=33))
count = 0
for date in common_timezone.monthly_iter(start, end):
if count == 0:
# On the first month
self.assertEqual(date.month, start.month)
self.assertEqual(date.month, start.month)
else:
# On the second month
self.assertEqual(date.month, end.month)
self.assertEqual(date.month, end.month)
count += 1
self.assertEqual(count, 2)