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# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
"""
Tests for L{twisted.internet.kqueuereactor}.
"""
from __future__ import division, absolute_import
import errno
from zope.interface import implementer
from twisted.trial.unittest import TestCase
try:
from twisted.internet.kqreactor import KQueueReactor, _IKQueue
kqueueSkip = None
except ImportError:
kqueueSkip = "KQueue not available."
def _fakeKEvent(*args, **kwargs):
"""
Do nothing.
"""
def makeFakeKQueue(testKQueue, testKEvent):
"""
Create a fake that implements L{_IKQueue}.
@param testKQueue: Something that acts like L{select.kqueue}.
@param testKEvent: Something that acts like L{select.kevent}.
@return: An implementation of L{_IKQueue} that includes C{testKQueue} and
C{testKEvent}.
"""
@implementer(_IKQueue)
class FakeKQueue(object):
kqueue = testKQueue
kevent = testKEvent
return FakeKQueue()
class KQueueTests(TestCase):
"""
These are tests for L{KQueueReactor}'s implementation, not its real world
behaviour. For that, look at
L{twisted.internet.test.reactormixins.ReactorBuilder}.
"""
skip = kqueueSkip
def test_EINTR(self):
"""
L{KQueueReactor} handles L{errno.EINTR} in C{doKEvent} by returning.
"""
class FakeKQueue(object):
"""
A fake KQueue that raises L{errno.EINTR} when C{control} is called,
like a real KQueue would if it was interrupted.
"""
def control(self, *args, **kwargs):
raise OSError(errno.EINTR, "Interrupted")
reactor = KQueueReactor(makeFakeKQueue(FakeKQueue, _fakeKEvent))
# This should return cleanly -- should not raise the OSError we're
# spawning, nor get upset and raise about the incomplete KQueue fake.
reactor.doKEvent(0)