pytest -k doesn't work with "\"? #8983
Description
Discussed in #8982
Originally posted by nguydavi August 7, 2021
Hey!
I've been trying to use pytest -k passing the name I got by parametrizing my test. For example,
$ pytest -vk 'test_solution[foo.py-5\n10\n-16\n]' validate.py
=========================================================================================================== test session starts ============================================================================================================platform linux -- Python 3.8.10, pytest-6.2.4, py-1.10.0, pluggy-0.13.1 -- /usr/bin/python3
cachedir: .pytest_cache
rootdir: /home/david/foo
collected 4 items
========================================================================================================== no tests ran in 0.01s ===========================================================================================================ERROR: Wrong expression passed to '-k': test_solution[foo.py-5\n10\n-16\n]: at column 23: unexpected character "\"
Note the error message
ERROR: Wrong expression passed to '-k': test_solution[foo.py-5\n10\n-16\n]: at column 23: unexpected character "\"
I tried escaping the \ but that didn't work, the only way I can make it work is to remove the backslashes completely,
$ pytest -vk 'test_solution[foo.py-5 and 10' validate.py
Is \ just not supported by -k ? Or am I missing something ?
Thanks!
EDIT:
A possible test case
@pytest.mark.parametrize(
"param1, param2",
[
pytest.param(
'5\n10\n', '16\n'
),
],
)
def test_solution(param1, param2):
pass
Which is then referred by pytest as test_solution[5\n10\n-16\n] . Essentially a new line character \n in the string brings the issue (or any escaped character probably)