linux-kernel - Re: [PATCH] drm/todo: Add entry for using kunit in the subsystem

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Date:   Wed, 4 May 2022 10:53:12 +0200
From:   Daniel Vetter <daniel@...ll.ch>
To:     Maxime Ripard <maxime@...no.tech>
Cc:     Javier Martinez Canillas <javierm@...hat.com>,
        linux-kernel@...r.kernel.org,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...ux.ie>,
        Jonathan Corbet <corbet@....net>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        dri-devel@...ts.freedesktop.org, linux-doc@...r.kernel.org
Subject: Re: [PATCH] drm/todo: Add entry for using kunit in the subsystem

On Wed, May 04, 2022 at 10:10:30AM +0200, Maxime Ripard wrote:
> Hi,
> 
> On Wed, May 04, 2022 at 10:02:12AM +0200, Javier Martinez Canillas wrote:
> > The Kernel Unit Testing (KUnit) framework provides a common framework for
> > unit tests within the Linux kernel. Having a test suite would allow to
> > identify regressions earlier.
> > 
> > Signed-off-by: Javier Martinez Canillas <javierm@...hat.com>
> > ---
> > 
> >  Documentation/gpu/todo.rst | 14 ++++++++++++++
> >  1 file changed, 14 insertions(+)
> > 
> > diff --git a/Documentation/gpu/todo.rst b/Documentation/gpu/todo.rst
> > index 127e76ee0b2d..10bfb50908d1 100644
> > --- a/Documentation/gpu/todo.rst
> > +++ b/Documentation/gpu/todo.rst
> > @@ -603,6 +603,20 @@ Level: Advanced
> >  Better Testing
> >  ==============
> >  
> > +Add unit tests using the Kernel Unit Testing (KUnit) framework
> > +--------------------------------------------------------------
> > +
> > +The `KUnit <https://www.kernel.org/doc/html/latest/dev-tools/kunit/index.html>`_
> > +provides a common framework for unit tests within the Linux kernel. Having a
> > +test suite would allow to identify regressions earlier.
> > +
> > +A good candidate for the first unit tests are the format-conversion helpers in
> > +``drm_format_helper.c``.
> > +
> > +Contact: Javier Martinez Canillas <javierm@...hat.com>
> > +
> > +Level: Intermediate
> 
> Kunit is fairly easy to grasp if you have some knowledge of other unit
> testing frameworks already (pytest, cmocka, etc.)
> 
> Another good candidate would be to convert (some ?) selftests to kunit.
> I'm not sure the others, but at least test-drm_cmdline_parser should be
> fairly easy to convert.

All the drm selftest should be good candidates for conversion to kunit.

Either way patch is Acked-by: Daniel Vetter <daniel.vetter@...ll.ch>

Cheers, Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch