Fixed that test_start_cmd.py failed with additional lines

changes/1481.fix.rst

@@ -0,0 +1,3 @@
+Test: Fixed that listener unit test module test_start_cmd.py failed with
+additional lines. These lines were pytest warnings about unraisable exception
+SystemExit that is (correctly) raised in the exit handler.

tests/unit/pywbemlistener/test_start_cmd.py

@@ -371,8 +371,13 @@
             rc=1,
             stderr=[r"Cannot import module nomodule: "
                     r"No module named .?nomodule.?"],
-            test='all',
+            test='in',
         ),
+        # The SystemExit raised in the exit handler causes pytest to warn
+        # about an unraisable exception ("Exception ignored in ..."). According
+        # to the pytest docs, this warning can be silenced (e.g. with
+        # "-p no:threadexception"), but that did not work. Therefore, we use
+        # test='in' to tolerate the warning on stderr.
         RUN_NO_WIN,
     ),
     (
@@ -387,8 +392,13 @@
             rc=1,
             stderr=[r"Function nofunction\(\) not found in module "
                     r"tests\.unit\.pywbemlistener\.indicall_display"],
-            test='all',
+            test='in',
         ),
+        # The SystemExit raised in the exit handler causes pytest to warn
+        # about an unraisable exception ("Exception ignored in ..."). According
+        # to the pytest docs, this warning can be silenced (e.g. with
+        # "-p no:threadexception"), but that did not work. Therefore, we use
+        # test='in' to tolerate the warning on stderr.
         RUN_NO_WIN,
     ),
     (
@@ -403,8 +413,13 @@
             rc=1,
             stderr=[r"Cannot import module tests\.unit\.pywbemlistener\."
                     r"indicall_importerror: ImportError"],
-            test='all',
+            test='in',
         ),
+        # The SystemExit raised in the exit handler causes pytest to warn
+        # about an unraisable exception ("Exception ignored in ..."). According
+        # to the pytest docs, this warning can be silenced (e.g. with
+        # "-p no:threadexception"), but that did not work. Therefore, we use
+        # test='in' to tolerate the warning on stderr.
         RUN_NO_WIN,
     ),
     (