linux-kernel - Re: [PATCH] Documentation: kunit: Clarify test filter format

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Date: Tue, 2 Apr 2024 11:52:10 +0200
From: Brendan Jackman <jackmanb@...gle.com>
To: Daniel Latypov <dlatypov@...gle.com>
Cc: linux-kselftest@...r.kernel.org, kunit-dev@...glegroups.com, 
	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Brendan Higgins <brendan.higgins@...ux.dev>, davidgow@...gle.com, rmoar@...gle.com, 
	corbet@....net
Subject: Re: [PATCH] Documentation: kunit: Clarify test filter format

On Thu, 28 Mar 2024 at 19:27, Daniel Latypov <dlatypov@...gle.com> wrote:
> This current wording and examples (before and after this change) might
> make the user think otherwise, i.e. that it works like
>   effective_name = suite_name + '.' + test_name
>   return glob_matches(effective_name, filter_glob)
>
> E.g. given a test name like `suite.test_name` and glob='suite*name'
> they might expect it to match, but it does *not*.
>
> The logic actually works like:
>   suite_glob, test_glob = split(filter_glob)
>   if not_glob_matches(suite_name, suite_glob):
>      return False
>   if test_glob and not glob_matches(test_name, test_glob):
>      return False
>   return True
>
> Perhaps expanding the list of examples to cover more of the edge cases
> could help get the right intuition?
>
> E.g. perhaps these:
>   kunit.py run <suite_name>  # runs all tests in a specific suite
>   kunit.py run <suite_name>.<test_name>  # run a specific test
>
>   kunit.py run suite_prefix*  # what the current example shows
>   kunit.py run *.*test_suffix  # matches all suites, only tests w/ a
> certain suffix
>   kunit.py run suite_prefix*.*test_suffix # combined version of above
>
> Thoughts?

Thanks yeah, good point. The result is pretty verbose but it doesn't
create much cognitive load for the reader so might as well just be
really explicit. v2 incoming if `make htmldocs` ever finishes....