import logging
import logging.config

# test setup: add a FileHandler as the only handler of the root logger
fileHandler = logging.FileHandler("./debug_log.txt", mode="w")
fileHandler.setFormatter(logging.Formatter("%(message)s"))
root_logger = logging.getLogger()
root_logger.addHandler(fileHandler)

# this works fine - the message is added to the file
logging.warning("test message 1")

# set a trivial configuration: no formatters, handlers or loggers.
# "disable_existing_loggers" is set to False
logging.config.dictConfig({"version": 1, "disable_existing_loggers": False})

# the FileHandler doesn't work anymore - this message won't be added to the file
logging.warning("test message 2")

# the handler is in inconsistent state - it's still added to the logger,
# but it's already flush()'ed and close()'d
assert fileHandler in root_logger.handlers
assert fileHandler._closed == True