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TST: Period with Timestamp overflow #34755

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Merged
merged 5 commits into from
Oct 5, 2020
Merged

TST: Period with Timestamp overflow #34755

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3f05de1
#TST #13346 added tests
Jun 13, 2020
3c33ec8
TST #13346 taken review into account
Jun 14, 2020
9765d1d
Merge remote-tracking branch 'upstream/master' into TST_13346
Jul 7, 2020
37f03d6
Added tests for #13346 - with review
Jul 7, 2020
0ed2fdc
Merge remote-tracking branch 'upstream/master' into TST_13346
Oct 5, 2020
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30 changes: 30 additions & 0 deletions pandas/tests/scalar/period/test_period.py
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Original file line number Diff line number Diff line change
Expand Up @@ -6,6 +6,7 @@

from pandas._libs.tslibs import iNaT, period as libperiod
from pandas._libs.tslibs.ccalendar import DAYS, MONTHS
from pandas._libs.tslibs.np_datetime import OutOfBoundsDatetime
from pandas._libs.tslibs.parsing import DateParseError
from pandas._libs.tslibs.period import INVALID_FREQ_ERR_MSG, IncompatibleFrequency
from pandas._libs.tslibs.timezones import dateutil_gettz, maybe_get_tz
Expand Down Expand Up @@ -776,6 +777,35 @@ def test_period_deprecated_freq(self):
assert isinstance(p1, Period)
assert isinstance(p2, Period)

def _period_constructor(bound, offset):
return Period(
year=bound.year,
month=bound.month,
day=bound.day,
hour=bound.hour,
minute=bound.minute,
second=bound.second + offset,
freq="us",
)

@pytest.mark.parametrize("bound, offset", [(Timestamp.min, -1), (Timestamp.max, 1)])
@pytest.mark.parametrize("period_property", ["start_time", "end_time"])
def test_outter_bounds_start_and_end_time(self, bound, offset, period_property):
# GH #13346
period = TestPeriodProperties._period_constructor(bound, offset)
with pytest.raises(OutOfBoundsDatetime, match="Out of bounds nanosecond"):
getattr(period, period_property)

@pytest.mark.parametrize("bound, offset", [(Timestamp.min, -1), (Timestamp.max, 1)])
@pytest.mark.parametrize("period_property", ["start_time", "end_time"])
def test_inner_bounds_start_and_end_time(self, bound, offset, period_property):
# GH #13346
period = TestPeriodProperties._period_constructor(bound, -offset)
expected = period.to_timestamp().round(freq="S")
assert getattr(period, period_property).round(freq="S") == expected
expected = (bound - offset * Timedelta(1, unit="S")).floor("S")
assert getattr(period, period_property).floor("S") == expected

def test_start_time(self):
freq_lst = ["A", "Q", "M", "D", "H", "T", "S"]
xp = datetime(2012, 1, 1)
Expand Down