linux-kernel - Re: [PATCH] kunit: run kunit

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Date:   Tue, 11 Feb 2020 10:48:19 -0800
From:   Brendan Higgins <brendanhiggins@...gle.com>
To:     "Bird, Tim" <Tim.Bird@...y.com>
Cc:     Heidi Fahim <heidifahim@...gle.com>,
        David Gow <davidgow@...gle.com>,
        Daniel Latypov <dlatypov@...gle.com>,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>,
        KUnit Development <kunit-dev@...glegroups.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] kunit: run kunit_tool from any directory

On Tue, Feb 11, 2020 at 10:26 AM Bird, Tim <Tim.Bird@...y.com> wrote:
> > -----Original Message-----
> > From: Brendan Higgins
> > Sent: Monday, February 10, 2020 5:32 PM
> > To: Heidi Fahim <heidifahim@...gle.com>; David Gow <davidgow@...gle.com>; Daniel Latypov <dlatypov@...gle.com>
> > Cc: open list:KERNEL SELFTEST FRAMEWORK <linux-kselftest@...r.kernel.org>; KUnit Development <kunit-dev@...glegroups.com>; Linux
> > Kernel Mailing List <linux-kernel@...r.kernel.org>
> > Subject: Re: [PATCH] kunit: run kunit_tool from any directory
> >
> > On Mon, Feb 10, 2020 at 4:26 PM Heidi Fahim <heidifahim@...gle.com> wrote:
> > >
> > > Implemented small fix so that the script changes work directories to the
> > > linux directory where kunit.py is run. This enables the user to run
> > > kunit from any working directory. Originally considered using
> > > os.path.join but this is more error prone as we would have to find all
> > > file path usages and modify them accordingly. Using os.chdir ensures
> > > that the entire script is run within /linux.
> > >
> > > Signed-off-by: Heidi Fahim <heidifahim@...gle.com>
> >
> > Reviewed-by: Brendan Higgins <brendanhiggins@...gle.com>
> >
> Sorry - I'm not a current kunit user, but does this mean that the
> kernel source has to be present in order to run the unit tests?
> That's problematical for embedded systems.  Maybe that's outside
> the scope of what unit tests were envisioned for?

No worries.

It is already the case that the kunit_tool assumes you have the
source. It's purpose is to build tests, run them, and collect results.
We are working on separating these functions, but right now given that
the script assumes it will build the kernel for you, it is necessarily
the case that you have source.

You can, nevertheless, build and run KUnit tests without the use of
our scripts, which should work for most applications.