GH648 Allowing dateoffset weekday from relativedelta

[loicdiridollou]

• Closes DateOffset for weekday argument requires weekday argument from dateutil #648
• Tests added: Please use assert_type() to assert the type of any return value

[Dr-Irv]

You can't use parameterize to do a type checking test.

You will need to have explicit lines with assert_type() for each value you wish to test.

[loicdiridollou]

I am not sure I understand what you mean here.
Having parametrize is (I believe) equivalent to splitting the test in individual tests for all the given parameters. So in my mind this is testing the type individually for each value. Maybe the goal is to make it more readable by having one line for each, if so happy to change it, but let me know if I miss anything with parametrize.
When I run the tests by hand here is what I see:

 pytest tests/test_timefuncs.py::test_dateoffset_weekday -v
========================== test session starts ===========================
platform darwin -- Python 3.12.4, pytest-8.3.2, pluggy-1.5.0 -- /Users/loic.diridollou/Documents/Code/pandas-stubs/venv/bin/python
cachedir: .pytest_cache
rootdir: /Users/loic.diridollou/Documents/Code/pandas-stubs
configfile: pyproject.toml
collected 9 items

tests/test_timefuncs.py::test_dateoffset_weekday[1] PASSED         [ 11%]
tests/test_timefuncs.py::test_dateoffset_weekday[weekday1] PASSED  [ 22%]
tests/test_timefuncs.py::test_dateoffset_weekday[weekday2] PASSED  [ 33%]
tests/test_timefuncs.py::test_dateoffset_weekday[weekday3] PASSED  [ 44%]
tests/test_timefuncs.py::test_dateoffset_weekday[weekday4] PASSED  [ 55%]
tests/test_timefuncs.py::test_dateoffset_weekday[weekday5] PASSED  [ 66%]
tests/test_timefuncs.py::test_dateoffset_weekday[weekday6] PASSED  [ 77%]
tests/test_timefuncs.py::test_dateoffset_weekday[weekday7] PASSED  [ 88%]
tests/test_timefuncs.py::test_dateoffset_weekday[weekday8] PASSED  [100%]

=========================== 9 passed in 0.21s ============================