# Copyright (C) 2008-2009 by the Free Software Foundation, Inc. # # This file is part of GNU Mailman. # # GNU Mailman is free software: you can redistribute it and/or modify it under # the terms of the GNU General Public License as published by the Free # Software Foundation, either version 3 of the License, or (at your option) # any later version. # # GNU Mailman is distributed in the hope that it will be useful, but WITHOUT # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for # more details. # # You should have received a copy of the GNU General Public License along with # GNU Mailman. If not, see . """Various test helpers.""" from __future__ import absolute_import, unicode_literals __metaclass__ = type __all__ = [ 'TestableMaster', 'digest_mbox', 'get_lmtp_client', 'get_queue_messages', 'make_testable_runner', 'wait_for_webservice', ] import os import time import errno import signal import socket import logging import smtplib import datetime import threading from mailman.bin.master import Loop as Master from mailman.config import config from mailman.utilities.mailbox import Mailbox STARTUP_WAIT = datetime.timedelta(seconds=5) log = logging.getLogger('mailman.debug') def make_testable_runner(runner_class, name=None): """Create a queue runner that runs until its queue is empty. :param runner_class: The queue runner's class. :type runner_class: class :param name: Optional queue name; if not given, it is calculated from the class name. :type name: string or None :return: A runner instance. """ if name is None: assert runner_class.__name__.endswith('Runner'), ( 'Unparseable runner class name: %s' % runner_class.__name__) name = runner_class.__name__[:-6].lower() class EmptyingRunner(runner_class): """Stop processing when the queue is empty.""" def __init__(self, *args, **kws): super(EmptyingRunner, self).__init__(*args, **kws) # We know it's an EmptyingRunner, so really we want to see the # super class in the log files. self.__class__.__name__ = runner_class.__name__ def _do_periodic(self): """Stop when the queue is empty.""" self._stop = (len(self.switchboard.files) == 0) return EmptyingRunner(name) class _Bag: def __init__(self, **kws): for key, value in kws.items(): setattr(self, key, value) def get_queue_messages(queue_name): """Return and clear all the messages in the given queue. :param queue_name: A string naming a queue. :return: A list of 2-tuples where each item contains the message and message metadata. """ queue = config.switchboards[queue_name] messages = [] for filebase in queue.files: msg, msgdata = queue.dequeue(filebase) messages.append(_Bag(msg=msg, msgdata=msgdata)) queue.finish(filebase) return messages def digest_mbox(mlist): """The mailing list's pending digest as a mailbox. :param mlist: The mailing list. :return: The mailing list's pending digest as a mailbox. """ path = os.path.join(mlist.data_path, 'digest.mmdf') return Mailbox(path) class TestableMaster(Master): """A testable master loop watcher.""" def __init__(self, start_check=None): """Create a testable master loop watcher. :param start_check: Optional callable used to check whether everything is running as the test expects. Called in `loop()` in the subthread before the event is set. The callback should block until the pass condition is set. :type start_check: Callable taking no arguments, returning nothing. """ super(TestableMaster, self).__init__( restartable=False, config_file=config.filename) self.start_check = start_check self.event = threading.Event() self.thread = threading.Thread(target=self.loop) self.thread.daemon = True self._started_kids = None def _pause(self): """See `Master`.""" # No-op this because the tests generally do not signal the master, # which would mean the signal.pause() never exits. pass def start(self, *qrunners): """Start the master.""" self.start_qrunners(qrunners) self.thread.start() # Wait until all the children are definitely started. self.event.wait() def stop(self): """Stop the master by killing all the children.""" for pid in self.qrunner_pids: os.kill(pid, signal.SIGTERM) self.cleanup() self.thread.join() def loop(self): """Wait until all the qrunners are actually running before looping.""" starting_kids = set(self._kids) while starting_kids: for pid in self._kids: try: os.kill(pid, 0) starting_kids.remove(pid) except OSError as error: if error.errno == errno.ESRCH: # The child has not yet started. pass raise # Keeping a copy of all the started child processes for use by the # testing environment, even after all have exited. self._started_kids = set(self._kids) # If there are extra conditions to check, do it now. if self.start_check is not None: self.start_check() # Let the blocking thread know everything's running. self.event.set() super(TestableMaster, self).loop() @property def qrunner_pids(self): """The pids of all the child qrunner processes.""" for pid in self._started_kids: yield pid class LMTP(smtplib.SMTP): """Like a normal SMTP client, but for LMTP.""" def lhlo(self, name=''): self.putcmd('lhlo', name or self.local_hostname) code, msg = self.getreply() self.helo_resp = msg return code, msg def get_lmtp_client(): """Return a connected LMTP client.""" # It's possible the process has started but is not yet accepting # connections. Wait a little while. lmtp = LMTP() until = datetime.datetime.now() + STARTUP_WAIT while datetime.datetime.now() < until: try: response = lmtp.connect( config.mta.lmtp_host, int(config.mta.lmtp_port)) print response return lmtp except socket.error, error: if error[0] == errno.ECONNREFUSED: time.sleep(0.5) else: raise else: raise RuntimeError('Connection refused') def wait_for_webservice(): """Wait for the REST server to start serving requests.""" # Time out after approximately 3 seconds. for count in range(30): try: socket.socket().connect((config.webservice.hostname, int(config.webservice.port))) except socket.error: time.sleep(0.1) else: break