mirror of
https://github.com/python/cpython.git
synced 2025-10-30 21:21:22 +00:00
70 lines
2.2 KiB
Python
70 lines
2.2 KiB
Python
|
import logging
|
||
|
|
import collections
|
||
|
|
|
||
|
|
from .case import _BaseTestCaseContext
|
||
|
|
|
||
|
|
|
||
|
|
_LoggingWatcher = collections.namedtuple("_LoggingWatcher",
|
||
|
|
["records", "output"])
|
||
|
|
|
||
|
|
class _CapturingHandler(logging.Handler):
|
||
|
|
"""
|
||
|
|
A logging handler capturing all (raw and formatted) logging output.
|
||
|
|
"""
|
||
|
|
|
||
|
|
def __init__(self):
|
||
|
|
logging.Handler.__init__(self)
|
||
|
|
self.watcher = _LoggingWatcher([], [])
|
||
|
|
|
||
|
|
def flush(self):
|
||
|
|
pass
|
||
|
|
|
||
|
|
def emit(self, record):
|
||
|
|
self.watcher.records.append(record)
|
||
|
|
msg = self.format(record)
|
||
|
|
self.watcher.output.append(msg)
|
||
|
|
|
||
|
|
|
||
|
|
class _AssertLogsContext(_BaseTestCaseContext):
|
||
|
|
"""A context manager used to implement TestCase.assertLogs()."""
|
||
|
|
|
||
|
|
LOGGING_FORMAT = "%(levelname)s:%(name)s:%(message)s"
|
||
|
|
|
||
|
|
def __init__(self, test_case, logger_name, level):
|
||
|
|
_BaseTestCaseContext.__init__(self, test_case)
|
||
|
|
self.logger_name = logger_name
|
||
|
|
if level:
|
||
|
|
self.level = logging._nameToLevel.get(level, level)
|
||
|
|
else:
|
||
|
|
self.level = logging.INFO
|
||
|
|
self.msg = None
|
||
|
|
|
||
|
|
def __enter__(self):
|
||
|
|
if isinstance(self.logger_name, logging.Logger):
|
||
|
|
logger = self.logger = self.logger_name
|
||
|
|
else:
|
||
|
|
logger = self.logger = logging.getLogger(self.logger_name)
|
||
|
|
formatter = logging.Formatter(self.LOGGING_FORMAT)
|
||
|
|
handler = _CapturingHandler()
|
||
|
|
handler.setFormatter(formatter)
|
||
|
|
self.watcher = handler.watcher
|
||
|
|
self.old_handlers = logger.handlers[:]
|
||
|
|
self.old_level = logger.level
|
||
|
|
self.old_propagate = logger.propagate
|
||
|
|
logger.handlers = [handler]
|
||
|
|
logger.setLevel(self.level)
|
||
|
|
logger.propagate = False
|
||
|
|
return handler.watcher
|
||
|
|
|
||
|
|
def __exit__(self, exc_type, exc_value, tb):
|
||
|
|
self.logger.handlers = self.old_handlers
|
||
|
|
self.logger.propagate = self.old_propagate
|
||
|
|
self.logger.setLevel(self.old_level)
|
||
|
|
if exc_type is not None:
|
||
|
|
# let unexpected exceptions pass through
|
||
|
|
return False
|
||
|
|
if len(self.watcher.records) == 0:
|
||
|
|
self._raiseFailure(
|
||
|
|
"no logs of level {} or higher triggered on {}"
|
||
|
|
.format(logging.getLevelName(self.level), self.logger.name))
|