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

[Nicolas Schier]

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@xxxxxxxxx>
---
 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]
+
         # Clear KCONFIG_DEFCONFIG_LIST to keep unit tests from being affected
         # by the user's environment.
         extra_env['KCONFIG_DEFCONFIG_LIST'] = ''

-- 
2.55.0