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import sys
import logbook
class MyObject:
def __init__(self, logger_func):
self._logger_func = logger_func
def __str__(self):
self._logger_func("this debug message produced in __str__")
return "<complex object>"
class FakeLock:
def __init__(self):
self._acquired = False
self._deadlock_occurred = False
def acquire(self):
if self._acquired:
self._deadlock_occurred = True
self._acquired = True
def release(self):
self._acquired = False
def test_deadlock_in_emit():
logbook_logger = logbook.Logger("logbook")
obj = MyObject(logbook_logger.info)
stream_handler = logbook.StreamHandler(stream=sys.stderr, level=logbook.DEBUG)
stream_handler.lock = FakeLock()
with stream_handler.applicationbound():
logbook_logger.info("format this: {}", obj)
assert not stream_handler.lock._deadlock_occurred
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