[PATCH RFC 2/2] drm: add documentation for drm_buddy_test kUnit test

[Rae Moar]

On Wed, Jul 12, 2023 at 10:29 AM Mauro Carvalho Chehab <mchehab at kernel.org>
wrote:

> As an example for the new documentation tool, add a documentation
> for drm_buddy_test.
>
> I opted to place this on a completely different directory, in order
> to make easier to test the feature with:
>
>         $ make SPHINXDIRS="tests" htmldocs
>
> Signed-off-by: Mauro Carvalho Chehab <mchehab at kernel.org>
> ---
>
> To avoid mailbombing on a large number of people, only mailing lists were
> C/C on the cover.
> See [PATCH RFC 0/2] at:
> https://lore.kernel.org/all/cover.1689171160.git.mchehab@kernel.org/
>
>  Documentation/index.rst                |  2 +-
>  Documentation/tests/index.rst          |  6 ++++++
>  Documentation/tests/kunit.rst          |  5 +++++
>  drivers/gpu/drm/tests/drm_buddy_test.c | 12 ++++++++++++
>  4 files changed, 24 insertions(+), 1 deletion(-)
>  create mode 100644 Documentation/tests/index.rst
>  create mode 100644 Documentation/tests/kunit.rst
>
> diff --git a/Documentation/index.rst b/Documentation/index.rst
> index 9dfdc826618c..80a6ce14a61a 100644
> --- a/Documentation/index.rst
> +++ b/Documentation/index.rst
> @@ -60,7 +60,7 @@ Various other manuals with useful information for all
> kernel developers.
>     fault-injection/index
>     livepatch/index
>     rust/index
> -
> +   test/index
>
>  User-oriented documentation
>  ===========================
> diff --git a/Documentation/tests/index.rst b/Documentation/tests/index.rst
> new file mode 100644
> index 000000000000..bfc39eb5c0aa
> --- /dev/null
> +++ b/Documentation/tests/index.rst
> @@ -0,0 +1,6 @@
> +========================
> +Kunit documentation test
> +========================
> +
> +.. toctree::
> +   kunit
> diff --git a/Documentation/tests/kunit.rst b/Documentation/tests/kunit.rst
> new file mode 100644
> index 000000000000..6ffc151988a0
> --- /dev/null
> +++ b/Documentation/tests/kunit.rst
> @@ -0,0 +1,5 @@
> +Kunit tests
> +-----------
> +
> +.. include-test:: drivers/gpu/drm/tests/drm_buddy_test.c
> +
> diff --git a/drivers/gpu/drm/tests/drm_buddy_test.c
> b/drivers/gpu/drm/tests/drm_buddy_test.c
> index 09ee6f6af896..dd6c5afd6cd6 100644
> --- a/drivers/gpu/drm/tests/drm_buddy_test.c
> +++ b/drivers/gpu/drm/tests/drm_buddy_test.c
> @@ -737,6 +737,18 @@ static int drm_buddy_suite_init(struct kunit_suite
> *suite)
>         return 0;
>  }
>
> +/**
> + * KTEST_SUITE: set of tests for drm buddy alloc
> + * Scope: drm subsystem
> + * Mega feature: drm
> + * Feature: buddy_alloc
> + *
> + * KTEST_TEST: drm_test_buddy_alloc_%s
> + * Description: Run DRM buddy allocation %arg[1] test
> + *
> + * arg[1].values: limit, range, optimistic, smoke, pathological
> + */


Hi!

This is such a cool patch series. I just have a few comments related to the
output.

In the html output the tests are listed as:
ktest at drm_buddy_test@…

I wonder if instead of using the file name of “drm_buddy_test” this could
possibly be the suite name, “drm_buddy”, as this is what users will call
when using kunit.py to run the tests. Although "drm_buddy_test" is also the
module name so I don't mind it too much. But in the future the file name
and module name are not guaranteed to be the same for other tests.

Most preferably, there would be a reference to the kunit suite name, file
name, and the module name.

This may be difficult to implement as these can all differ. I am currently
working on the KUnit Attribute framework which saves the module name and I
am thinking about also saving the file path as a future attribute. This
could be a helpful framework for the KUnit tests specifically.

I am not sure how easy it would be to access c objects/functions using this
system.

Finally, I was wondering if it is the intention to put a list of all kunit
tests that use this new feature into tests/kunit.rst or would this be
broken up in some way

Thanks!
-Rae



> +
>  static struct kunit_case drm_buddy_tests[] = {
>         KUNIT_CASE(drm_test_buddy_alloc_limit),
>         KUNIT_CASE(drm_test_buddy_alloc_range),
> --
> 2.40.1
>
>
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