[PATCH] selftests: tc-testing: preserve list order when removing duplicates

[mr . navi8680]

From: Naveen Anandhan <mr.navi8680@xxxxxxxxx>

Using set() removes duplicates but breaks ordering.
Test output should be deterministic, so replace with dict.fromkeys().

Signed-off-by: Naveen Anandhan <mr.navi8680@xxxxxxxxx>
---
 tools/testing/selftests/tc-testing/tdc_helper.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/tc-testing/tdc_helper.py b/tools/testing/selftests/tc-testing/tdc_helper.py
index 0440d252c4c5..e06f03c0fb5d 100644
--- a/tools/testing/selftests/tc-testing/tdc_helper.py
+++ b/tools/testing/selftests/tc-testing/tdc_helper.py
@@ -16,9 +16,9 @@ def get_categorized_testlist(alltests, ucat):
 
 
 def get_unique_item(lst):
-    """ For a list, return a list of the unique items in the list. """
+    """Return unique items while preserving original order."""
     if len(lst) > 1:
-        return list(set(lst))
+        return list(dict.fromkeys(lst))
     else:
         return lst
 
-- 
2.43.0