Skip to content

TST: xfail test for DatetimeIndex.union across DST boundary #63087

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
wants to merge 2 commits into
base: main
Choose a base branch
from
Open

TST: xfail test for DatetimeIndex.union across DST boundary #63087

Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
5c06cbb
TST: xfail test for DatetimeIndex.union across DST boundary (GH#62915)
antznette1 Nov 12, 2025
f487dc9
TST: wrap long comment to satisfy ruff E501 (GH#62915)
antznette1 Nov 12, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
25 changes: 25 additions & 0 deletions pandas/tests/indexes/datetimes/test_setops.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -60,6 +60,31 @@ def test_union3(self, sort, box):
result = first.union(case, sort=sort)
tm.assert_index_equal(result, expected)


@pytest.mark.xfail(reason="see GH#62915: union across DST boundary", strict=False)
def test_union_across_dst_boundary_xfail():
# US/Eastern DST spring-forward on 2021-03-14 at 02:00
# (02:00-02:59 local time does not exist)
tz = "US/Eastern"
# Left side spans up to the missing hour window
left = date_range("2021-03-14 00:00", periods=3, freq="H", tz=tz)
# right side continues from the first valid post-DST hour
right = date_range("2021-03-14 03:00", periods=3, freq="H", tz=tz)

# Expect a union that preserves tz and includes valid hours without duplicates
expected = DatetimeIndex(
[
Timestamp("2021-03-14 00:00", tz=tz),
Timestamp("2021-03-14 01:00", tz=tz),
Timestamp("2021-03-14 03:00", tz=tz),
Timestamp("2021-03-14 04:00", tz=tz),
Timestamp("2021-03-14 05:00", tz=tz),
]
)

result = left.union(right)
tm.assert_index_equal(result, expected)

@pytest.mark.parametrize("tz", tz)
def test_union(self, tz, sort):
rng1 = date_range("1/1/2000", freq="D", periods=5, tz=tz)
Expand Down
Loading