linux-kernel - Re: [PATCH v2 4/4] minor: kunit: tool: fix unit test so it can run from non-root dir

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Message-ID: <CABVgOS=sPxdDLaQ39DwZX5rLVzgb4Fbn5SvhiQxt5S3s+QC56Q@mail.gmail.com>
Date:   Thu, 3 Dec 2020 11:06:26 +0800
From:   David Gow <davidgow@...gle.com>
To:     Daniel Latypov <dlatypov@...gle.com>
Cc:     Brendan Higgins <brendanhiggins@...gle.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>,
        Shuah Khan <skhan@...uxfoundation.org>
Subject: Re: [PATCH v2 4/4] minor: kunit: tool: fix unit test so it can run
 from non-root dir

On Thu, Dec 3, 2020 at 3:09 AM Daniel Latypov <dlatypov@...gle.com> wrote:
>
> Also take this time to rename get_absolute_path() to test_data_path().
>
> 1. the name is currently a lie. It gives relative paths, e.g. if I run
> from the same dir as the test file, it gives './test_data/<file>'
>
> See https://docs.python.org/3/reference/import.html#__file__, which
> doesn't stipulate that implementations provide absolute paths.
>
> 2. it's only used for generating paths to tools/testing/kunit/test_data/
> So we can tersen things by making it less general.
>
> Cache the absolute path to the test data files per suggestion from  [1].
> Using relative paths, the tests break because of this code in kunit.py
>   if get_kernel_root_path():
>           os.chdir(get_kernel_root_path())
>
> [1] https://lore.kernel.org/linux-kselftest/CABVgOSnH0gz7z5JhRCGyG1wg0zDDBTLoSUCoB-gWMeXLgVTo2w@mail.gmail.com/
>
> Fixes: 5578d008d9e0 ("kunit: tool: fix running kunit_tool from outside kernel tree")
> Signed-off-by: Daniel Latypov <dlatypov@...gle.com>
> ---

Thanks: I much prefer this to v1. Having it work the same way as
test_tmpdir is a bonus.

Reviewed-by: David Gow <davidgow@...gle.com>

Cheers,
-- David