ci: fix xfail test cases end up failed when existing known failure cases

conftest.py

@@ -195,16 +195,20 @@ class IdfPytestEmbedded:
         )
 
         self._failed_cases: List[
-            Tuple[str, bool]
-        ] = []  # (test_case_name, is_known_failure_cases)
+            Tuple[str, bool, bool]
+        ] = []  # (test_case_name, is_known_failure_cases, is_xfail)
 
     @property
     def failed_cases(self) -> List[str]:
-        return [case for case, is_known in self._failed_cases if not is_known]
+        return [case for case, is_known, is_xfail in self._failed_cases if not is_known and not is_xfail]
 
     @property
     def known_failure_cases(self) -> List[str]:
-        return [case for case, is_known in self._failed_cases if is_known]
+        return [case for case, is_known, _ in self._failed_cases if is_known]
+
+    @property
+    def xfail_cases(self) -> List[str]:
+        return [case for case, _, is_xfail in self._failed_cases if is_xfail]
 
     @staticmethod
     def _parse_known_failure_cases_file(
@@ -278,7 +282,8 @@ class IdfPytestEmbedded:
         if report.outcome == 'failed':
             test_case_name = item.funcargs.get('test_case_name', '')
             is_known_failure = self._is_known_failure(test_case_name)
-            self._failed_cases.append((test_case_name, is_known_failure))
+            is_xfail = report.keywords.get('xfail', False)
+            self._failed_cases.append((test_case_name, is_known_failure, is_xfail))
 
         return report
 
@@ -327,6 +332,10 @@ class IdfPytestEmbedded:
             terminalreporter.section('Known failure cases', bold=True, yellow=True)
             terminalreporter.line('\n'.join(self.known_failure_cases))
 
+        if self.xfail_cases:
+            terminalreporter.section('xfail cases', bold=True, yellow=True)
+            terminalreporter.line('\n'.join(self.xfail_cases))
+
         if self.failed_cases:
             terminalreporter.section('Failed cases', bold=True, red=True)
             terminalreporter.line('\n'.join(self.failed_cases))