Issue #11852: Add missing imports and update tests.

Lib/logging/handlers.py

@@ -26,6 +26,8 @@ To use, simply 'import logging.handlers' and log away!
 
 import logging, socket, os, pickle, struct, time, re
 from stat import ST_DEV, ST_INO, ST_MTIME
+import queue
+import threading
 
 try:
     import codecs

Lib/test/test_logging.py

@@ -41,6 +41,7 @@ import struct
 import sys
 import tempfile
 from test.support import captured_stdout, run_with_locale, run_unittest
+from test.support import TestHandler, Matcher
 import textwrap
 import unittest
 import warnings
@@ -2092,6 +2093,21 @@ class QueueHandlerTest(BaseTest):
         self.assertEqual(data.name, self.que_logger.name)
         self.assertEqual((data.msg, data.args), (msg, None))
 
+    def test_queue_listener(self):
+        handler = TestHandler(Matcher())
+        listener = logging.handlers.QueueListener(self.queue, handler)
+        listener.start()
+        try:
+            self.que_logger.warning(self.next_message())
+            self.que_logger.error(self.next_message())
+            self.que_logger.critical(self.next_message())
+        finally:
+            listener.stop()
+        self.assertTrue(handler.matches(levelno=logging.WARNING, message='1'))
+        self.assertTrue(handler.matches(levelno=logging.ERROR, message='2'))
+        self.assertTrue(handler.matches(levelno=logging.CRITICAL, message='3'))
+
+
 class FormatterTest(unittest.TestCase):
     def setUp(self):
         self.common = {

Misc/NEWS

@@ -60,6 +60,8 @@ Core and Builtins
 Library
 -------
 
+- Issue #11852: Add missing imports and update tests.
+
 - Issue #11467: Fix urlparse behavior when handling urls which contains scheme
   specific part only digits. Patch by Santoso Wijaya.