[Bug]: Investigate failing cuDF timezone tests

[LiamConnors]

Describe the bug

There are currently a few tests failing for timezones and cuDF:

tests/utils.py:60: AssertionError
=========================== short test summary info ============================
FAILED tests/expr_and_series/convert_time_zone_test.py::test_convert_time_zone_from_none[cudf_constructor] - AssertionError: ('2020-01-01T05:45+0000', '2020-01-01T05:45+0545')
FAILED tests/expr_and_series/convert_time_zone_test.py::test_convert_time_zone[cudf_constructor] - AssertionError: ('2020-01-01T05:45+0000', '2020-01-01T05:45+0545')
FAILED tests/expr_and_series/convert_time_zone_test.py::test_convert_time_zone_series[cudf_constructor] - AssertionError: ('2020-01-01T05:45+0000', '2020-01-01T05:45+0545')
FAILED tests/expr_and_series/replace_time_zone_test.py::test_replace_time_zone_series[cudf_constructor] - AssertionError: ('2020-01-01T00:00+0000', '2020-01-01T00:00+0545')
FAILED tests/expr_and_series/replace_time_zone_test.py::test_replace_time_zone[cudf_constructor] - AssertionError: ('2020-01-01T00:00+0000', '2020-01-01T00:00+0545')
===== 5 failed, 4842 passed, 15 skipped, 143 xfailed in 108.35s (0:01:48) ======

Steps or code to reproduce the bug

Run the cuDF testing notebook;
https://www.kaggle.com/code/marcogorelli/testing-cudf-in-narwhals

Expected results

No error

Actual results

Errors on five tests

Please run narwhals.show_version() and enter the output below.

Version on main

Relevant log output

No response

[MarcoGorelli]

thanks @LiamConnors !

there's been a new cudf release, so I've updated the top cell of the notebook to get the latest version https://www.kaggle.com/code/marcogorelli/testing-cudf-in-narwhals?scriptVersionId=201439002

there's a couple of [XPASS(strict)] which is always nice to see 🥳

this particular bug has been fixed by the looks of it, it's just not available in the latest cuDF release (yet?) rapidsai/cudf#16973

[LiamConnors]

Thanks @MarcoGorelli! Ah, I see. I hadn't noticed it was related to the issue you already raised. I'll update the tests to pass for the current version.