def test_cron_clock_hourly_daylight_savings_time_backward(self, serialize):
"""
11/4/2018, at 2am, America/New_York switched clocks back an hour.
"""
dt = pendulum.datetime(2018, 11, 3, 23, tz="America/New_York")
c = clocks.CronClock("0 * * * *", dt)
if serialize:
c = ClockSchema().load(ClockSchema().dump(c))
next_4 = islice(c.events(after=dt), 4)
# repeat the 1am run in local time
assert [t.in_tz("America/New_York").hour for t in next_4] == [0, 1, 2, 3]
# runs every hour UTC
assert [t.in_tz("UTC").hour for t in next_4] == [4, 6, 7, 8]
def test_cron_clock_hourly_daylight_savings_time_forward(self, serialize):
"""
On 3/11/2018, at 2am, America/New_York switched clocks forward an hour.
"""
dt = pendulum.datetime(2018, 3, 10, 23, tz="America/New_York")
c = clocks.CronClock("0 * * * *", dt)
if serialize:
c = ClockSchema().load(ClockSchema().dump(c))
next_4 = islice(c.events(after=dt), 4)
# skip 2am
assert [t.in_tz("America/New_York").hour for t in next_4] == [0, 1, 3, 4]
# constant hourly schedule in utc time
assert [t.in_tz("UTC").hour for t in next_4] == [5, 6, 7, 8]
def test_cron_clock_daily_start_daylight_savings_time_backward(self, serialize):
"""
On 11/4/2018, at 2am, America/New_York switched clocks back an hour.
Confirm that a schedule for 9am America/New_York stays 9am through the switch.
"""
dt = pendulum.datetime(2018, 11, 1, 9, tz="America/New_York")
c = clocks.CronClock("0 9 * * *", dt)
if serialize:
c = ClockSchema().load(ClockSchema().dump(c))
next_4 = islice(c.events(after=dt), 4)
# constant 9am start
assert [t.in_tz("America/New_York").hour for t in next_4] == [9, 9, 9, 9]
assert [t.in_tz("UTC").hour for t in next_4] == [13, 13, 14, 14]
def test_interval_clock_daily_start_daylight_savings_time_forward(self, serialize):
"""
On 3/11/2018, at 2am, America/New_York switched clocks forward an hour.
Confirm that a schedule for 9am America/New_York stays 9am through the switch.
"""
dt = pendulum.datetime(2018, 3, 8, 9, tz="America/New_York")
c = clocks.IntervalClock(timedelta(days=1), start_date=dt)
if serialize:
c = ClockSchema().load(ClockSchema().dump(c))
next_4 = islice(c.events(after=dt), 4)
# constant 9am start
assert [t.in_tz("America/New_York").hour for t in next_4] == [9, 9, 9, 9]
# utc time shifts
assert [t.in_tz("UTC").hour for t in next_4] == [14, 14, 13, 13]
def test_interval_clock_hourly_daylight_savings_time_backward(self, serialize):
"""
11/4/2018, at 2am, America/New_York switched clocks back an hour.
"""
dt = pendulum.datetime(2018, 11, 3, 23, tz="America/New_York")
c = clocks.IntervalClock(timedelta(hours=1), start_date=dt)
if serialize:
c = ClockSchema().load(ClockSchema().dump(c))
next_4 = islice(c.events(after=dt), 4)
# repeat the 1am run in local time
assert [t.start_time.in_tz("America/New_York").hour for t in next_4] == [
0,
1,
1,
2,
]
# runs every hour UTC
assert [t.start_time.in_tz("UTC").hour for t in next_4] == [4, 5, 6, 7]
def test_interval_clock_hourly_daylight_savings_time_forward_with_UTC(
self, serialize
):
"""
On 3/11/2018, at 2am, America/New_York switched clocks forward an hour.
"""
dt = pendulum.datetime(2018, 3, 10, 23, tz="America/New_York")
c = clocks.IntervalClock(timedelta(hours=1), start_date=dt.in_tz("UTC"))
if serialize:
c = ClockSchema().load(ClockSchema().dump(c))
next_4 = islice(c.events(after=dt), 4)
# skip 2am
assert [t.start_time.in_tz("America/New_York").hour for t in next_4] == [
0,
1,
3,
4,
]
# constant hourly schedule in utc time
assert [t.start_time.in_tz("UTC").hour for t in next_4] == [5, 6, 7, 8]
