How to use the mqttwarn.util.timeout function in mqttwarn

def test_timeout():

    duration = 0.005
    below_duration = duration - old_div(duration, 2)
    above_duration = duration + old_div(duration, 2)

    def func():
        time.sleep(duration)
        return 42

    def errfunc():
        raise ValueError('Something went wrong')

    assert timeout(func, timeout_secs=below_duration) is False
    assert timeout(func, timeout_secs=above_duration) == 42

    # FIXME: Better catch and report the exception?
    # FIXME: Derive "timeout_secs" from "duration"
    with pytest.raises(ValueError) as excinfo:
        timeout(errfunc, timeout_secs=0.10, default='foobar')
        excinfo.message == 'Something went wrong'

above_duration = duration + old_div(duration, 2)

    def func():
        time.sleep(duration)
        return 42

    def errfunc():
        raise ValueError('Something went wrong')

    assert timeout(func, timeout_secs=below_duration) is False
    assert timeout(func, timeout_secs=above_duration) == 42

    # FIXME: Better catch and report the exception?
    # FIXME: Derive "timeout_secs" from "duration"
    with pytest.raises(ValueError) as excinfo:
        timeout(errfunc, timeout_secs=0.10, default='foobar')
        excinfo.message == 'Something went wrong'

text = render_template(template, transform_data)
                    if text is not None:
                        item['message'] = text
                except Exception as e:
                    logger.warning("Cannot render `%s' template: %s" % (template, e))

        if item.get('message') is not None and len(item.get('message')) > 0:
            st = Struct(**item)
            notified = False
            logger.info("Invoking service plugin for `%s'" % service)
            try:
                # Fire the plugin in a separate thread and kill it if it doesn't return in 10s
                module = service_plugins[service]['module']
                service_logger_name = 'mqttwarn.services.{}'.format(service)
                srv = make_service(mqttc=mqttc, name=service_logger_name)
                notified = timeout(module.plugin, (srv, st))
            except Exception as e:
                logger.exception("Cannot invoke service for `%s'" % service)

            if not notified:
                logger.warning("Notification of %s for `%s' FAILED or TIMED OUT" % (service, item.get('topic')))
        else:
            logger.warning("Notification of %s for `%s' suppressed: text is empty" % (service, item.get('topic')))

        q_in.task_done()

    logger.debug("Thread exiting...")