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Refactored tests for timestamps
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‎pandas/tests/scalar/test_timestamp.py

Lines changed: 89 additions & 103 deletions
Original file line numberDiff line numberDiff line change
@@ -13,6 +13,7 @@
1313
from datetime import datetime, timedelta
1414
from distutils.version import LooseVersion
1515
from pytz.exceptions import AmbiguousTimeError, NonExistentTimeError
16+
from collections import namedtuple
1617

1718
import pandas.util.testing as tm
1819
import pandas.util._test_decorators as td
@@ -656,82 +657,102 @@ def test_to_pydatetime_nonzero_nano(self):
656657
result = ts.to_pydatetime()
657658
assert result == expected
658659

659-
def test_round(self):
660-
661-
# round
662-
dt = Timestamp('20130101 09:10:11')
663-
result = dt.round('D')
664-
expected = Timestamp('20130101')
665-
assert result == expected
666-
667-
dt = Timestamp('20130101 19:10:11')
668-
result = dt.round('D')
669-
expected = Timestamp('20130102')
670-
assert result == expected
671-
672-
dt = Timestamp('20130201 12:00:00')
673-
result = dt.round('D')
674-
expected = Timestamp('20130202')
675-
assert result == expected
660+
TStestcase = namedtuple('Tstestcase',
661+
['input', 'rounder', 'freq', 'expected', 'kw'])
662+
663+
def _check_round(self, cases):
664+
for case in cases:
665+
dt = Timestamp(case.input, **case.kw)
666+
rounder = getattr(dt, case.rounder)
667+
freqs = ([case.freq] if not isinstance(case.freq, list)
668+
else case.freq)
669+
expected = ([case.expected] if not isinstance(case.expected, list)
670+
else case.expected)
671+
if len(expected) != len(freqs):
672+
pairs = zip(freqs, expected * len(freqs))
673+
else:
674+
pairs = zip(freqs, expected)
675+
676+
for freq, expect in pairs:
677+
result = rounder(freq)
678+
expected = Timestamp(expect, **case.kw)
679+
assert result == expected, ('input={input}, '
680+
'rounder={rounder}, '
681+
'freq={freq}, expected={expect}, '
682+
'kw={kw}'
683+
.format(input=case.input,
684+
rounder=case.rounder,
685+
freq=freq,
686+
expect=expect,
687+
kw=case.kw))
688+
689+
def test_floor_timestamp(self):
690+
cases = [
691+
# floor
692+
self.TStestcase('20130101 09:10:11', 'floor', 'D', '20130101', {}),
693+
# GH19206
694+
self.TStestcase('2117-01-01 00:00:45', 'floor', '15s',
695+
'2117-01-01 00:00:45', {}),
696+
# GH19206
697+
self.TStestcase('2117-01-01 00:00:45.000000012', 'floor', '10ns',
698+
'2117-01-01 00:00:45.000000010', {}),
699+
# GH19206
700+
self.TStestcase('1823-01-01 00:00:01', 'floor', '1s',
701+
'1823-01-01 00:00:01', {}),
702+
# GH19206
703+
self.TStestcase('1823-01-01 00:00:01.000000012', 'floor', '10ns',
704+
'1823-01-01 00:00:01.000000010', {})
705+
]
706+
self._check_round(cases)
707+
708+
def test_ceil_timestamp(self):
709+
cases = [
710+
# ceil
711+
self.TStestcase('20130101 09:10:11', 'ceil', 'D', '20130102', {})
712+
]
713+
self._check_round(cases)
714+
715+
def test_round_timestamp(self):
716+
717+
cases = [
718+
self.TStestcase('20130101 09:10:11', 'round', 'D', '20130101', {}),
719+
self.TStestcase('20130101 19:10:11', 'round', 'D', '20130102', {}),
720+
self.TStestcase('20130201 12:00:00', 'round', 'D', '20130202', {}),
721+
self.TStestcase('20130104 12:00:00', 'round', 'D', '20130105', {}),
722+
self.TStestcase('20130104 12:32:00', 'round', '30Min',
723+
'20130104 12:30:00', {}),
724+
# round with tz
725+
self.TStestcase('20130101 09:10:11', 'round', 'D', '20130101',
726+
{'tz': 'US/Eastern'}),
727+
self.TStestcase('20130101 09:10:11', 'round', 's',
728+
'20130101 09:10:11', {'tz': 'US/Eastern'}),
729+
# GH 14440 & 15578
730+
self.TStestcase('2016-10-17 12:00:00.0015', 'round', 'ms',
731+
'2016-10-17 12:00:00.002000', {}),
732+
self.TStestcase('2016-10-17 12:00:00.00149', 'round', 'ms',
733+
'2016-10-17 12:00:00.001000', {}),
734+
self.TStestcase('2016-10-17 12:00:00.0015', 'round', ['us', 'ns'],
735+
'2016-10-17 12:00:00.0015', {}),
736+
self.TStestcase('2016-10-17 12:00:00.001501031', 'round', '10ns',
737+
'2016-10-17 12:00:00.001501030', {}),
738+
self.TStestcase('2000-01-05 05:09:15.13', 'round', ['D', 'H', 'S'],
739+
['2000-01-05 00:00:00', '2000-01-05 05:00:00',
740+
'2000-01-05 05:09:15'], {})
741+
]
742+
self._check_round(cases)
676743

677-
dt = Timestamp('20130104 12:00:00')
678-
result = dt.round('D')
679-
expected = Timestamp('20130105')
680-
assert result == expected
744+
with tm.assert_raises_regex(ValueError, _INVALID_FREQ_ERROR):
745+
Timestamp('2000-01-05 05:09:15.13').round('foo')
681746

682-
dt = Timestamp('20130104 12:32:00')
683-
result = dt.round('30Min')
684-
expected = Timestamp('20130104 12:30:00')
685-
assert result == expected
747+
with tm.assert_produces_warning():
748+
Timestamp('2016-10-17 12:00:00.001501031').round('1010ns')
686749

750+
def test_round_daterange(self):
687751
dti = date_range('20130101 09:10:11', periods=5)
688752
result = dti.round('D')
689753
expected = date_range('20130101', periods=5)
690754
tm.assert_index_equal(result, expected)
691755

692-
# floor
693-
dt = Timestamp('20130101 09:10:11')
694-
result = dt.floor('D')
695-
expected = Timestamp('20130101')
696-
assert result == expected
697-
698-
# GH 19206
699-
dt = Timestamp('2117-01-01 00:00:45')
700-
result = dt.floor('15s')
701-
expected = Timestamp('2117-01-01 00:00:45')
702-
assert result == expected
703-
704-
dt = Timestamp('2117-01-01 00:00:45.000000012')
705-
result = dt.floor('10ns')
706-
expected = Timestamp('2117-01-01 00:00:45.000000010')
707-
assert result == expected
708-
709-
dt = Timestamp('1823-01-01 00:00:01')
710-
result = dt.floor('1s')
711-
expected = Timestamp('1823-01-01 00:00:01')
712-
assert result == expected
713-
714-
dt = Timestamp('1823-01-01 00:00:01.000000012')
715-
result = dt.floor('10ns')
716-
expected = Timestamp('1823-01-01 00:00:01.000000010')
717-
assert result == expected
718-
719-
# ceil
720-
dt = Timestamp('20130101 09:10:11')
721-
result = dt.ceil('D')
722-
expected = Timestamp('20130102')
723-
assert result == expected
724-
725-
# round with tz
726-
dt = Timestamp('20130101 09:10:11', tz='US/Eastern')
727-
result = dt.round('D')
728-
expected = Timestamp('20130101', tz='US/Eastern')
729-
assert result == expected
730-
731-
dt = Timestamp('20130101 09:10:11', tz='US/Eastern')
732-
result = dt.round('s')
733-
assert result == dt
734-
735756
dti = date_range('20130101 09:10:11',
736757
periods=5).tz_localize('UTC').tz_convert('US/Eastern')
737758
result = dti.round('D')
@@ -745,41 +766,6 @@ def test_round(self):
745766
for freq in ['Y', 'M', 'foobar']:
746767
pytest.raises(ValueError, lambda: dti.round(freq))
747768

748-
# GH 14440 & 15578
749-
result = Timestamp('2016-10-17 12:00:00.0015').round('ms')
750-
expected = Timestamp('2016-10-17 12:00:00.002000')
751-
assert result == expected
752-
753-
result = Timestamp('2016-10-17 12:00:00.00149').round('ms')
754-
expected = Timestamp('2016-10-17 12:00:00.001000')
755-
assert result == expected
756-
757-
ts = Timestamp('2016-10-17 12:00:00.0015')
758-
for freq in ['us', 'ns']:
759-
assert ts == ts.round(freq)
760-
761-
result = Timestamp('2016-10-17 12:00:00.001501031').round('10ns')
762-
expected = Timestamp('2016-10-17 12:00:00.001501030')
763-
assert result == expected
764-
765-
with tm.assert_produces_warning():
766-
Timestamp('2016-10-17 12:00:00.001501031').round('1010ns')
767-
768-
def test_round_misc(self):
769-
stamp = Timestamp('2000-01-05 05:09:15.13')
770-
771-
def _check_round(freq, expected):
772-
result = stamp.round(freq=freq)
773-
assert result == expected
774-
775-
for freq, expected in [('D', Timestamp('2000-01-05 00:00:00')),
776-
('H', Timestamp('2000-01-05 05:00:00')),
777-
('S', Timestamp('2000-01-05 05:09:15'))]:
778-
_check_round(freq, expected)
779-
780-
with tm.assert_raises_regex(ValueError, _INVALID_FREQ_ERROR):
781-
stamp.round('foo')
782-
783769
def test_class_ops_pytz(self):
784770
def compare(x, y):
785771
assert (int(Timestamp(x).value / 1e9) ==

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