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import sys
import unittest
import errno
import select
from supervisor.tests.base import Mock
from supervisor.poller import SelectPoller, PollPoller, KQueuePoller
from supervisor.poller import implements_poll, implements_kqueue
from supervisor.tests.base import DummyOptions
# this base class is used instead of unittest.TestCase to hide
# a TestCase subclass from test runner when the implementation is
# not available
SkipTestCase = object
class BasePollerTests(unittest.TestCase):
def _makeOne(self, options):
from supervisor.poller import BasePoller
return BasePoller(options)
def test_register_readable(self):
inst = self._makeOne(None)
self.assertRaises(NotImplementedError, inst.register_readable, None)
def test_register_writable(self):
inst = self._makeOne(None)
self.assertRaises(NotImplementedError, inst.register_writable, None)
def test_unregister_readable(self):
inst = self._makeOne(None)
self.assertRaises(NotImplementedError, inst.unregister_readable, None)
def test_unregister_writable(self):
inst = self._makeOne(None)
self.assertRaises(NotImplementedError, inst.unregister_writable, None)
def test_poll(self):
inst = self._makeOne(None)
self.assertRaises(NotImplementedError, inst.poll, None)
def test_before_daemonize(self):
inst = self._makeOne(None)
self.assertEqual(inst.before_daemonize(), None)
def test_after_daemonize(self):
inst = self._makeOne(None)
self.assertEqual(inst.after_daemonize(), None)
class SelectPollerTests(unittest.TestCase):
def _makeOne(self, options):
return SelectPoller(options)
def test_register_readable(self):
poller = self._makeOne(DummyOptions())
poller.register_readable(6)
poller.register_readable(7)
self.assertEqual(sorted(poller.readables), [6,7])
def test_register_writable(self):
poller = self._makeOne(DummyOptions())
poller.register_writable(6)
poller.register_writable(7)
self.assertEqual(sorted(poller.writables), [6,7])
def test_unregister_readable(self):
poller = self._makeOne(DummyOptions())
poller.register_readable(6)
poller.register_readable(7)
poller.register_writable(8)
poller.register_writable(9)
poller.unregister_readable(6)
poller.unregister_readable(9)
poller.unregister_readable(100) # not registered, ignore error
self.assertEqual(list(poller.readables), [7])
self.assertEqual(list(poller.writables), [8, 9])
def test_unregister_writable(self):
poller = self._makeOne(DummyOptions())
poller.register_readable(6)
poller.register_readable(7)
poller.register_writable(8)
poller.register_writable(6)
poller.unregister_writable(7)
poller.unregister_writable(6)
poller.unregister_writable(100) # not registered, ignore error
self.assertEqual(list(poller.readables), [6, 7])
self.assertEqual(list(poller.writables), [8])
def test_poll_returns_readables_and_writables(self):
_select = DummySelect(result={'readables': [6],
'writables': [8]})
poller = self._makeOne(DummyOptions())
poller._select = _select
poller.register_readable(6)
poller.register_readable(7)
poller.register_writable(8)
readables, writables = poller.poll(1)
self.assertEqual(readables, [6])
self.assertEqual(writables, [8])
def test_poll_ignores_eintr(self):
_select = DummySelect(error=errno.EINTR)
options = DummyOptions()
poller = self._makeOne(options)
poller._select = _select
poller.register_readable(6)
poller.poll(1)
self.assertEqual(options.logger.data[0], 'EINTR encountered in poll')
def test_poll_ignores_ebadf(self):
_select = DummySelect(error=errno.EBADF)
options = DummyOptions()
poller = self._makeOne(options)
poller._select = _select
poller.register_readable(6)
poller.poll(1)
self.assertEqual(options.logger.data[0], 'EBADF encountered in poll')
self.assertEqual(list(poller.readables), [])
self.assertEqual(list(poller.writables), [])
def test_poll_uncaught_exception(self):
_select = DummySelect(error=errno.EPERM)
options = DummyOptions()
poller = self._makeOne(options)
poller._select = _select
poller.register_readable(6)
self.assertRaises(select.error, poller.poll, 1)
if implements_kqueue():
KQueuePollerTestsBase = unittest.TestCase
else:
KQueuePollerTestsBase = SkipTestCase
class KQueuePollerTests(KQueuePollerTestsBase):
def _makeOne(self, options):
return KQueuePoller(options)
def test_register_readable(self):
kqueue = DummyKQueue()
poller = self._makeOne(DummyOptions())
poller._kqueue = kqueue
poller.register_readable(6)
self.assertEqual(list(poller.readables), [6])
self.assertEqual(len(kqueue.registered_kevents), 1)
self.assertReadEventAdded(kqueue.registered_kevents[0], 6)
def test_register_writable(self):
kqueue = DummyKQueue()
poller = self._makeOne(DummyOptions())
poller._kqueue = kqueue
poller.register_writable(7)
self.assertEqual(list(poller.writables), [7])
self.assertEqual(len(kqueue.registered_kevents), 1)
self.assertWriteEventAdded(kqueue.registered_kevents[0], 7)
def test_unregister_readable(self):
kqueue = DummyKQueue()
poller = self._makeOne(DummyOptions())
poller._kqueue = kqueue
poller.register_writable(7)
poller.register_readable(8)
poller.unregister_readable(7)
poller.unregister_readable(8)
poller.unregister_readable(100) # not registered, ignore error
self.assertEqual(list(poller.writables), [7])
self.assertEqual(list(poller.readables), [])
self.assertWriteEventAdded(kqueue.registered_kevents[0], 7)
self.assertReadEventAdded(kqueue.registered_kevents[1], 8)
self.assertReadEventDeleted(kqueue.registered_kevents[2], 7)
self.assertReadEventDeleted(kqueue.registered_kevents[3], 8)
def test_unregister_writable(self):
kqueue = DummyKQueue()
poller = self._makeOne(DummyOptions())
poller._kqueue = kqueue
poller.register_writable(7)
poller.register_readable(8)
poller.unregister_writable(7)
poller.unregister_writable(8)
poller.unregister_writable(100) # not registered, ignore error
self.assertEqual(list(poller.writables), [])
self.assertEqual(list(poller.readables), [8])
self.assertWriteEventAdded(kqueue.registered_kevents[0], 7)
self.assertReadEventAdded(kqueue.registered_kevents[1], 8)
self.assertWriteEventDeleted(kqueue.registered_kevents[2], 7)
self.assertWriteEventDeleted(kqueue.registered_kevents[3], 8)
def test_poll_returns_readables_and_writables(self):
kqueue = DummyKQueue(result=[(6, select.KQ_FILTER_READ),
(7, select.KQ_FILTER_READ),
(8, select.KQ_FILTER_WRITE)])
poller = self._makeOne(DummyOptions())
poller._kqueue = kqueue
poller.register_readable(6)
poller.register_readable(7)
poller.register_writable(8)
readables, writables = poller.poll(1000)
self.assertEqual(readables, [6,7])
self.assertEqual(writables, [8])
def test_poll_ignores_eintr(self):
kqueue = DummyKQueue(raise_errno_poll=errno.EINTR)
options = DummyOptions()
poller = self._makeOne(options)
poller._kqueue = kqueue
poller.register_readable(6)
poller.poll(1000)
self.assertEqual(options.logger.data[0], 'EINTR encountered in poll')
def test_register_readable_and_writable_ignores_ebadf(self):
_kqueue = DummyKQueue(raise_errno_register=errno.EBADF)
options = DummyOptions()
poller = self._makeOne(options)
poller._kqueue = _kqueue
poller.register_readable(6)
poller.register_writable(7)
self.assertEqual(options.logger.data[0],
'EBADF encountered in kqueue. Invalid file descriptor 6')
self.assertEqual(options.logger.data[1],
'EBADF encountered in kqueue. Invalid file descriptor 7')
def test_register_uncaught_exception(self):
_kqueue = DummyKQueue(raise_errno_register=errno.ENOMEM)
options = DummyOptions()
poller = self._makeOne(options)
poller._kqueue = _kqueue
self.assertRaises(OSError, poller.register_readable, 5)
def test_poll_uncaught_exception(self):
kqueue = DummyKQueue(raise_errno_poll=errno.EINVAL)
options = DummyOptions()
poller = self._makeOne(options)
poller._kqueue = kqueue
poller.register_readable(6)
self.assertRaises(OSError, poller.poll, 1000)
def test_before_daemonize_closes_kqueue(self):
mock_kqueue = Mock()
options = DummyOptions()
poller = self._makeOne(options)
poller._kqueue = mock_kqueue
poller.before_daemonize()
mock_kqueue.close.assert_called_once_with()
self.assertEqual(poller._kqueue, None)
def test_after_daemonize_restores_kqueue(self):
options = DummyOptions()
poller = self._makeOne(options)
poller.readables = [1]
poller.writables = [3]
poller.register_readable = Mock()
poller.register_writable = Mock()
poller.after_daemonize()
self.assertTrue(isinstance(poller._kqueue, select.kqueue))
poller.register_readable.assert_called_with(1)
poller.register_writable.assert_called_with(3)
def test_close_closes_kqueue(self):
mock_kqueue = Mock()
options = DummyOptions()
poller = self._makeOne(options)
poller._kqueue = mock_kqueue
poller.close()
mock_kqueue.close.assert_called_once_with()
self.assertEqual(poller._kqueue, None)
def assertReadEventAdded(self, kevent, fd):
self.assertKevent(kevent, fd, select.KQ_FILTER_READ, select.KQ_EV_ADD)
def assertWriteEventAdded(self, kevent, fd):
self.assertKevent(kevent, fd, select.KQ_FILTER_WRITE, select.KQ_EV_ADD)
def assertReadEventDeleted(self, kevent, fd):
self.assertKevent(kevent, fd, select.KQ_FILTER_READ, select.KQ_EV_DELETE)
def assertWriteEventDeleted(self, kevent, fd):
self.assertKevent(kevent, fd, select.KQ_FILTER_WRITE, select.KQ_EV_DELETE)
def assertKevent(self, kevent, ident, filter, flags):
self.assertEqual(kevent.ident, ident)
self.assertEqual(kevent.filter, filter)
self.assertEqual(kevent.flags, flags)
if implements_poll():
PollerPollTestsBase = unittest.TestCase
else:
PollerPollTestsBase = SkipTestCase
class PollerPollTests(PollerPollTestsBase):
def _makeOne(self, options):
return PollPoller(options)
def test_register_readable(self):
select_poll = DummySelectPoll()
poller = self._makeOne(DummyOptions())
poller._poller = select_poll
poller.register_readable(6)
poller.register_readable(7)
self.assertEqual(select_poll.registered_as_readable, [6,7])
def test_register_writable(self):
select_poll = DummySelectPoll()
poller = self._makeOne(DummyOptions())
poller._poller = select_poll
poller.register_writable(6)
self.assertEqual(select_poll.registered_as_writable, [6])
def test_poll_returns_readables_and_writables(self):
select_poll = DummySelectPoll(result=[(6, select.POLLIN),
(7, select.POLLPRI),
(8, select.POLLOUT),
(9, select.POLLHUP)])
poller = self._makeOne(DummyOptions())
poller._poller = select_poll
poller.register_readable(6)
poller.register_readable(7)
poller.register_writable(8)
poller.register_readable(9)
readables, writables = poller.poll(1000)
self.assertEqual(readables, [6,7,9])
self.assertEqual(writables, [8])
def test_poll_ignores_eintr(self):
select_poll = DummySelectPoll(error=errno.EINTR)
options = DummyOptions()
poller = self._makeOne(options)
poller._poller = select_poll
poller.register_readable(9)
poller.poll(1000)
self.assertEqual(options.logger.data[0], 'EINTR encountered in poll')
def test_poll_uncaught_exception(self):
select_poll = DummySelectPoll(error=errno.EBADF)
options = DummyOptions()
poller = self._makeOne(options)
poller._poller = select_poll
poller.register_readable(9)
self.assertRaises(select.error, poller.poll, 1000)
def test_poll_ignores_and_unregisters_closed_fd(self):
select_poll = DummySelectPoll(result=[(6, select.POLLNVAL),
(7, select.POLLPRI)])
poller = self._makeOne(DummyOptions())
poller._poller = select_poll
poller.register_readable(6)
poller.register_readable(7)
readables, writables = poller.poll(1000)
self.assertEqual(readables, [7])
self.assertEqual(select_poll.unregistered, [6])
class DummySelect(object):
'''
Fake implementation of select.select()
'''
def __init__(self, result=None, error=None):
result = result or {}
self.readables = result.get('readables', [])
self.writables = result.get('writables', [])
self.error = error
def select(self, r, w, x, timeout):
if self.error:
raise select.error(self.error)
return self.readables, self.writables, []
class DummySelectPoll(object):
'''
Fake implementation of select.poll()
'''
def __init__(self, result=None, error=None):
self.result = result or []
self.error = error
self.registered_as_readable = []
self.registered_as_writable = []
self.unregistered = []
def register(self, fd, eventmask):
if eventmask == select.POLLIN | select.POLLPRI | select.POLLHUP:
self.registered_as_readable.append(fd)
elif eventmask == select.POLLOUT:
self.registered_as_writable.append(fd)
else:
raise ValueError("Registered a fd on unknown eventmask: '{0}'".format(eventmask))
def unregister(self, fd):
self.unregistered.append(fd)
def poll(self, timeout):
if self.error:
raise select.error(self.error)
return self.result
class DummyKQueue(object):
'''
Fake implementation of select.kqueue()
'''
def __init__(self, result=None, raise_errno_poll=None, raise_errno_register=None):
self.result = result or []
self.errno_poll = raise_errno_poll
self.errno_register = raise_errno_register
self.registered_kevents = []
self.registered_flags = []
def control(self, kevents, max_events, timeout=None):
if kevents is None: # being called on poll()
self.assert_max_events_on_poll(max_events)
self.raise_error(self.errno_poll)
return self.build_result()
self.assert_max_events_on_register(max_events)
self.raise_error(self.errno_register)
self.registered_kevents.extend(kevents)
def raise_error(self, err):
if not err: return
ex = OSError()
ex.errno = err
raise ex
def build_result(self):
return [FakeKEvent(ident, filter) for ident,filter in self.result]
def assert_max_events_on_poll(self, max_events):
assert max_events == KQueuePoller.max_events, (
"`max_events` parameter of `kqueue.control() should be %d"
% KQueuePoller.max_events)
def assert_max_events_on_register(self, max_events):
assert max_events == 0, (
"`max_events` parameter of `kqueue.control()` should be 0 on register")
class FakeKEvent(object):
def __init__(self, ident, filter):
self.ident = ident
self.filter = filter
def test_suite():
return unittest.findTestCases(sys.modules[__name__])
if __name__ == '__main__':
unittest.main(defaultTest='test_suite')