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TST: add date range test for reindex case from GH-32740 #33265

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Merged
merged 16 commits into from
Apr 5, 2020
Merged
44 changes: 43 additions & 1 deletion pandas/tests/indexes/datetimes/test_datetime.py
Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
from datetime import date
from datetime import date, timedelta

import dateutil
import numpy as np
Expand Down Expand Up @@ -44,6 +44,48 @@ def test_reindex_preserves_tz_if_target_is_empty_list_or_array(self):
assert str(index.reindex([])[0].tz) == "US/Eastern"
assert str(index.reindex(np.array([]))[0].tz) == "US/Eastern"

def test_reindex_with_same_tz(self):
# GH 32740
rng_a = date_range('2010-01-01', '2010-01-02', periods=24, tz='utc')
rng_b = date_range('2010-01-01', '2010-01-02', periods=23, tz='utc')
result1, result2 = rng_a.reindex(rng_b, method='nearest',
tolerance=timedelta(seconds=20))
expected_list1 = [
'2010-01-01 00:00:00',
'2010-01-01 01:05:27.272727272',
'2010-01-01 02:10:54.545454545',
'2010-01-01 03:16:21.818181818',
'2010-01-01 04:21:49.090909090',
'2010-01-01 05:27:16.363636363',
'2010-01-01 06:32:43.636363636',
'2010-01-01 07:38:10.909090909',
'2010-01-01 08:43:38.181818181',
'2010-01-01 09:49:05.454545454',
'2010-01-01 10:54:32.727272727',
'2010-01-01 12:00:00',
'2010-01-01 13:05:27.272727272',
'2010-01-01 14:10:54.545454545',
'2010-01-01 15:16:21.818181818',
'2010-01-01 16:21:49.090909090',
'2010-01-01 17:27:16.363636363',
'2010-01-01 18:32:43.636363636',
'2010-01-01 19:38:10.909090909',
'2010-01-01 20:43:38.181818181',
'2010-01-01 21:49:05.454545454',
'2010-01-01 22:54:32.727272727',
'2010-01-02 00:00:00'
]
expected1 = DatetimeIndex(
expected_list1, dtype="datetime64[ns, UTC]", freq=None,
)
expected2 = np.array([
0, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, 23
])
tm.assert_index_equal(result1, expected1)
assert (result2 == expected2).all()

def test_time_loc(self): # GH8667
from datetime import time
from pandas._libs.index import _SIZE_CUTOFF
Expand Down