gh-119819: Fix regression to allow logging configuration with multipr… (GH-120030)

Lib/test/test_logging.py

@@ -3926,6 +3926,32 @@ class ConfigDictTest(BaseTest):
             msg = str(ctx.exception)
             self.assertEqual(msg, "Unable to configure handler 'ah'")
 
+    @unittest.skipIf(support.is_wasi, "WASI does not have multiprocessing.")
+    def test_multiprocessing_queues(self):
+        # See gh-119819
+        cd = copy.deepcopy(self.config_queue_handler)
+        from multiprocessing import Queue as MQ, Manager as MM
+        q1 = MQ()  # this can't be pickled
+        q2 = MM().Queue()  # a proxy queue for use when pickling is needed
+        for qspec in (q1, q2):
+            fn = make_temp_file('.log', 'test_logging-cmpqh-')
+            cd['handlers']['h1']['filename'] = fn
+            cd['handlers']['ah']['queue'] = qspec
+            qh = None
+            try:
+                self.apply_config(cd)
+                qh = logging.getHandlerByName('ah')
+                self.assertEqual(sorted(logging.getHandlerNames()), ['ah', 'h1'])
+                self.assertIsNotNone(qh.listener)
+                self.assertIs(qh.queue, qspec)
+                self.assertIs(qh.listener.queue, qspec)
+            finally:
+                h = logging.getHandlerByName('h1')
+                if h:
+                    self.addCleanup(closeFileHandler, h, fn)
+                else:
+                    self.addCleanup(os.remove, fn)
+
     def test_90195(self):
         # See gh-90195
         config = {