logging: added handler of last resort.
diff --git a/Lib/test/test_logging.py b/Lib/test/test_logging.py
index cd8cdbd..08fd7c4 100644
--- a/Lib/test/test_logging.py
+++ b/Lib/test/test_logging.py
@@ -1927,6 +1927,40 @@
f = logging.Formatter('asctime', style='$')
self.assertFalse(f.usesTime())
+class LastResortTest(BaseTest):
+ def test_last_resort(self):
+ "Test the last resort handler"
+ root = self.root_logger
+ root.removeHandler(self.root_hdlr)
+ old_stderr = sys.stderr
+ old_lastresort = logging.lastResort
+ old_raise_exceptions = logging.raiseExceptions
+ try:
+ sys.stderr = sio = io.StringIO()
+ root.warning('This is your final chance!')
+ self.assertEqual(sio.getvalue(), 'This is your final chance!\n')
+ #No handlers and no last resort, so 'No handlers' message
+ logging.lastResort = None
+ sys.stderr = sio = io.StringIO()
+ root.warning('This is your final chance!')
+ self.assertEqual(sio.getvalue(), 'No handlers could be found for logger "root"\n')
+ # 'No handlers' message only printed once
+ sys.stderr = sio = io.StringIO()
+ root.warning('This is your final chance!')
+ self.assertEqual(sio.getvalue(), '')
+ root.manager.emittedNoHandlerWarning = False
+ #If raiseExceptions is False, no message is printed
+ logging.raiseExceptions = False
+ sys.stderr = sio = io.StringIO()
+ root.warning('This is your final chance!')
+ self.assertEqual(sio.getvalue(), '')
+ finally:
+ sys.stderr = old_stderr
+ root.addHandler(self.root_hdlr)
+ logging.lastResort = old_lastresort
+ logging.raiseExceptions = old_raise_exceptions
+
+
class BaseFileTest(BaseTest):
"Base class for handler tests that write log files"
@@ -2017,6 +2051,7 @@
FormatterTest,
LogRecordFactoryTest, ChildLoggerTest, QueueHandlerTest,
RotatingFileHandlerTest,
+ LastResortTest,
#TimedRotatingFileHandlerTest
)