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TST: Check DatetimeIndex.drop on DST boundary #22165

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Aug 3, 2018
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TST: Check DatetimeIndex.drop on DST boundary #22165

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22 changes: 22 additions & 0 deletions pandas/tests/indexes/datetimes/test_timezones.py
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Original file line number Diff line number Diff line change
Expand Up @@ -738,6 +738,28 @@ def test_dti_drop_dont_lose_tz(self):

assert ind.tz is not None

def test_drop_dst_boundary(self):
# see gh-18031
tz = "Europe/Brussels"
freq = "15min"

start = pd.Timestamp("201710290100", tz=tz)
end = pd.Timestamp("201710290300", tz=tz)
index = pd.date_range(start=start, end=end, freq=freq)

expected = DatetimeIndex(["201710290115", "201710290130",
"201710290145", "201710290200",
"201710290215", "201710290230",
"201710290245", "201710290200",
"201710290215", "201710290230",
"201710290245", "201710290300"],
tz=tz, freq=freq,
ambiguous=[True, True, True, True,
True, True, True, False,
False, False, False, False])
result = index.drop(index[0])
tm.assert_index_equal(result, expected)

def test_date_range_localize(self):
rng = date_range('3/11/2012 03:00', periods=15, freq='H',
tz='US/Eastern')
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