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mitogen/tests/router_test.py

316 lines
10 KiB
Python

import Queue
import StringIO
import logging
import subprocess
import time
import unittest2
import testlib
import mitogen.master
import mitogen.parent
import mitogen.utils
def ping():
return True
@mitogen.core.takes_router
def ping_context(other, router):
other = mitogen.parent.Context(router, other.context_id)
other.call(ping)
@mitogen.core.takes_router
def return_router_max_message_size(router):
return router.max_message_size
def send_n_sized_reply(sender, n):
sender.send(' ' * n)
return 123
class SourceVerifyTest(testlib.RouterMixin, unittest2.TestCase):
def setUp(self):
super(SourceVerifyTest, self).setUp()
# Create some children, ping them, and store what their messages look
# like so we can mess with them later.
self.child1 = self.router.fork()
self.child1_msg = self.child1.call_async(ping).get()
self.child1_stream = self.router._stream_by_id[self.child1.context_id]
self.child2 = self.router.fork()
self.child2_msg = self.child2.call_async(ping).get()
self.child2_stream = self.router._stream_by_id[self.child2.context_id]
def test_bad_auth_id(self):
# Deliver a message locally from child2, but using child1's stream.
log = testlib.LogCapturer()
log.start()
# Used to ensure the message was dropped rather than routed after the
# error is logged.
recv = mitogen.core.Receiver(self.router)
self.child2_msg.handle = recv.handle
self.broker.defer(self.router._async_route,
self.child2_msg,
in_stream=self.child1_stream)
# Wait for IO loop to finish everything above.
self.sync_with_broker()
# Ensure message wasn't forwarded.
self.assertTrue(recv.empty())
# Ensure error was logged.
expect = 'bad auth_id: got %d via' % (self.child2_msg.auth_id,)
self.assertTrue(expect in log.stop())
def test_bad_src_id(self):
# Deliver a message locally from child2 with the correct auth_id, but
# the wrong src_id.
log = testlib.LogCapturer()
log.start()
# Used to ensure the message was dropped rather than routed after the
# error is logged.
recv = mitogen.core.Receiver(self.router)
self.child2_msg.handle = recv.handle
self.child2_msg.src_id = self.child1.context_id
self.broker.defer(self.router._async_route,
self.child2_msg,
self.child2_stream)
# Wait for IO loop to finish everything above.
self.sync_with_broker()
# Ensure message wasn't forwarded.
self.assertTrue(recv.empty())
# Ensure error was lgoged.
expect = 'bad src_id: got %d via' % (self.child1_msg.src_id,)
self.assertTrue(expect in log.stop())
class PolicyTest(testlib.RouterMixin, testlib.TestCase):
def test_allow_any(self):
# This guy gets everything.
recv = mitogen.core.Receiver(self.router)
recv.to_sender().send(123)
self.sync_with_broker()
self.assertFalse(recv.empty())
self.assertEquals(123, recv.get().unpickle())
def test_refuse_all(self):
# Deliver a message locally from child2 with the correct auth_id, but
# the wrong src_id.
log = testlib.LogCapturer()
log.start()
# This guy never gets anything.
recv = mitogen.core.Receiver(
router=self.router,
policy=(lambda msg, stream: False),
)
# This guy becomes the reply_to of our refused message.
reply_target = mitogen.core.Receiver(self.router)
# Send the message.
self.router.route(
mitogen.core.Message(
dst_id=mitogen.context_id,
handle=recv.handle,
reply_to=reply_target.handle,
)
)
# Wait for IO loop.
self.sync_with_broker()
# Verify log.
expect = '%r: policy refused message: ' % (self.router,)
self.assertTrue(expect in log.stop())
# Verify message was not delivered.
self.assertTrue(recv.empty())
# Verify CallError received by reply_to target.
e = self.assertRaises(mitogen.core.CallError,
lambda: reply_target.get().unpickle())
self.assertEquals(e[0], self.router.refused_msg)
class CrashTest(testlib.BrokerMixin, unittest2.TestCase):
# This is testing both Broker's ability to crash nicely, and Router's
# ability to respond to the crash event.
klass = mitogen.master.Router
def _naughty(self):
raise ValueError('eek')
def test_shutdown(self):
router = self.klass(self.broker)
sem = mitogen.core.Latch()
router.add_handler(sem.put)
log = testlib.LogCapturer('mitogen')
log.start()
# Force a crash and ensure it wakes up.
self.broker._loop_once = self._naughty
self.broker.defer(lambda: None)
# sem should have received dead message.
self.assertTrue(sem.get().is_dead)
# Ensure it was logged.
expect = '_broker_main() crashed'
self.assertTrue(expect in log.stop())
class AddHandlerTest(unittest2.TestCase):
klass = mitogen.master.Router
def test_invoked_at_shutdown(self):
router = self.klass()
queue = Queue.Queue()
handle = router.add_handler(queue.put)
router.broker.shutdown()
self.assertTrue(queue.get(timeout=5).is_dead)
class MessageSizeTest(testlib.BrokerMixin, unittest2.TestCase):
klass = mitogen.master.Router
def test_local_exceeded(self):
router = self.klass(broker=self.broker, max_message_size=4096)
recv = mitogen.core.Receiver(router)
logs = testlib.LogCapturer()
logs.start()
sem = mitogen.core.Latch()
router.route(mitogen.core.Message.pickled(' '*8192))
router.broker.defer(sem.put, ' ') # wlil always run after _async_route
sem.get()
expect = 'message too large (max 4096 bytes)'
self.assertTrue(expect in logs.stop())
def test_remote_configured(self):
router = self.klass(broker=self.broker, max_message_size=4096)
remote = router.fork()
size = remote.call(return_router_max_message_size)
self.assertEquals(size, 4096)
def test_remote_exceeded(self):
# Ensure new contexts receive a router with the same value.
router = self.klass(broker=self.broker, max_message_size=4096)
recv = mitogen.core.Receiver(router)
logs = testlib.LogCapturer()
logs.start()
remote = router.fork()
remote.call(send_n_sized_reply, recv.to_sender(), 8192)
expect = 'message too large (max 4096 bytes)'
self.assertTrue(expect in logs.stop())
class NoRouteTest(testlib.RouterMixin, testlib.TestCase):
def test_invalid_handle_returns_dead(self):
# Verify sending a message to an invalid handle yields a dead message
# from the target context.
l1 = self.router.fork()
recv = l1.send_async(mitogen.core.Message(handle=999))
msg = recv.get(throw_dead=False)
self.assertEquals(msg.is_dead, True)
self.assertEquals(msg.src_id, l1.context_id)
recv = l1.send_async(mitogen.core.Message(handle=999))
e = self.assertRaises(mitogen.core.ChannelError,
lambda: recv.get())
self.assertEquals(e.args[0], mitogen.core.ChannelError.remote_msg)
def test_totally_invalid_context_returns_dead(self):
recv = mitogen.core.Receiver(self.router)
msg = mitogen.core.Message(
dst_id=1234,
handle=1234,
reply_to=recv.handle,
)
self.router.route(msg)
rmsg = recv.get(throw_dead=False)
self.assertEquals(rmsg.is_dead, True)
self.assertEquals(rmsg.src_id, mitogen.context_id)
self.router.route(msg)
e = self.assertRaises(mitogen.core.ChannelError,
lambda: recv.get())
self.assertEquals(e.args[0], mitogen.core.ChannelError.local_msg)
def test_previously_alive_context_returns_dead(self):
l1 = self.router.fork()
l1.shutdown(wait=True)
recv = mitogen.core.Receiver(self.router)
msg = mitogen.core.Message(
dst_id=l1.context_id,
handle=mitogen.core.CALL_FUNCTION,
reply_to=recv.handle,
)
self.router.route(msg)
rmsg = recv.get(throw_dead=False)
self.assertEquals(rmsg.is_dead, True)
self.assertEquals(rmsg.src_id, mitogen.context_id)
self.router.route(msg)
e = self.assertRaises(mitogen.core.ChannelError,
lambda: recv.get())
self.assertEquals(e.args[0], mitogen.core.ChannelError.local_msg)
class UnidirectionalTest(testlib.RouterMixin, testlib.TestCase):
def test_siblings_cant_talk(self):
self.router.unidirectional = True
l1 = self.router.fork()
l2 = self.router.fork()
logs = testlib.LogCapturer()
logs.start()
e = self.assertRaises(mitogen.core.CallError,
lambda: l2.call(ping_context, l1))
msg = 'mitogen.core.ChannelError: Channel closed by remote end.'
self.assertTrue(msg in str(e))
self.assertTrue('routing mode prevents forward of ' in logs.stop())
def test_auth_id_can_talk(self):
self.router.unidirectional = True
# One stream has auth_id stamped to that of the master, so it should be
# treated like a parent.
l1 = self.router.fork()
l1s = self.router.stream_by_id(l1.context_id)
l1s.auth_id = mitogen.context_id
l1s.is_privileged = True
l2 = self.router.fork()
logs = testlib.LogCapturer()
logs.start()
e = self.assertRaises(mitogen.core.CallError,
lambda: l2.call(ping_context, l1))
msg = 'mitogen.core.CallError: Refused by policy.'
self.assertTrue(msg in str(e))
self.assertTrue('policy refused message: ' in logs.stop())
if __name__ == '__main__':
unittest2.main()