def test_file_logging(self):
        logfile = FilePath(self.mktemp()).child('foo.log')
        logfile.parent().makedirs()
        d = self.run_script(EliotScript, options=['--logfile', logfile.path])
        d.addCallback(self._assert_logfile_messages, logfile=logfile)
        return d
Append children to the element.
dataset/ETHPy150Open ClusterHQ/flocker/flocker/common/functional/test_script.py/FlockerScriptRunnerTests.test_file_logging--crossover with--dataset/ETHPy150Open openstack/rack/rack/api/xmlutil.py/TemplateElement.extend