Re: [PATCH 1/4] kconfig: tests: Reset KCONFIG_WARN_CHANGED_INPUT by default

[Julian Braha <julianbraha@gmail.com>]

On 9/17/26 14:38, Nicolas Schier wrote:
> Reset KCONFIG_WARN_CHANGED_INPUT by default for all kconfig tests but
> those which set it explicitly.
> 
> This fixes the 'warn_changed_input' test on systems with
> KCONFIG_WARN_CHANGED_INPUT=1 and ensures a cleaner test environment.
> 
> Fixes: 645323a7f4e5 ("kconfig: add optional warnings for changed input values")
> Signed-off-by: Nicolas Schier <n.schier@fritz.com>
> ---
>  scripts/kconfig/tests/conftest.py | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/scripts/kconfig/tests/conftest.py b/scripts/kconfig/tests/conftest.py
> index 66f95e4ed58c..e92f0cf1421a 100644
> --- a/scripts/kconfig/tests/conftest.py
> +++ b/scripts/kconfig/tests/conftest.py
> @@ -34,6 +34,9 @@ class Conf:
>          """
>          # the directory of the test being run
>          self._test_dir = os.path.dirname(str(request.fspath))
> +        self.default_env = {
> +            "KCONFIG_WARN_CHANGED_INPUT": "",
> +        }
>  
>      # runners
>      def _run_conf(self, mode, dot_config=None, out_file='.config',
> @@ -57,6 +60,11 @@ class Conf:
>          # Override 'srctree' environment to make the test as the top directory
>          extra_env['srctree'] = self._test_dir
>  
> +        # Set default environment variables, if not set by caller
> +        for var in self.default_env:
> +            if not var in extra_env:
> +                extra_env[var] = self.default_env[var]

Maybe it makes more sense to have the tests ignore users' env vars if
they would cause tests to fail? For example, this recent patch
explicitly unsets the KCONFIG_WERROR flag:
https://lore.kernel.org/linux-kbuild/4d1eee3a-a5f9-467e-880e-4f2815851b09@gmail.com/T/#m25be9ad4d5e62956c5f98759398f91a555afb4df

- Julian Braha