test_logging.py 文件源码

def test_race(self):
        # Issue #14632 refers.
        def remove_loop(fname, tries):
            for _ in range(tries):
                try:
                    os.unlink(fname)
                except OSError:
                    pass
                time.sleep(0.004 * random.randint(0, 4))

        del_count = 500
        log_count = 500

        for delay in (False, True):
            fd, fn = tempfile.mkstemp('.log', 'test_logging-3-')
            os.close(fd)
            remover = threading.Thread(target=remove_loop, args=(fn, del_count))
            remover.daemon = True
            remover.start()
            h = logging.handlers.WatchedFileHandler(fn, delay=delay)
            f = logging.Formatter('%(asctime)s: %(levelname)s: %(message)s')
            h.setFormatter(f)
            try:
                for _ in range(log_count):
                    time.sleep(0.005)
                    r = logging.makeLogRecord({'msg': 'testing' })
                    h.handle(r)
            finally:
                remover.join()
                try:
                    h.close()
                except ValueError:
                    pass
                if os.path.exists(fn):
                    os.unlink(fn)


# Set the locale to the platform-dependent default.  I have no idea
# why the test does this, but in any case we save the current locale
# first and restore it at the end.