# Copyright (c) 2001-2006 Twisted Matrix Laboratories.
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
"""
Tests for epoll wrapper.
"""
import errno
import os
import select
import socket
import time
import unittest
from test import support
if not hasattr(select, "epoll"):
raise unittest.SkipTest("test works only on Linux 2.6")
try:
select.epoll()
except OSError as e:
if e.errno == errno.ENOSYS:
raise unittest.SkipTest("kernel doesn't support epoll()")
raise
class TestEPoll(unittest.TestCase):
def setUp(self):
self.serverSocket = socket.create_server(('127.0.0.1', 0))
self.connections = [self.serverSocket]
def tearDown(self):
for skt in self.connections:
skt.close()
def _connected_pair(self):
client = socket.socket()
client.setblocking(False)
try:
client.connect(('127.0.0.1', self.serverSocket.getsockname()[1]))
except OSError as e:
self.assertEqual(e.args[0], errno.EINPROGRESS)
else:
raise AssertionError("Connect should have raised EINPROGRESS")
server, addr = self.serverSocket.accept()
self.connections.extend((client, server))
return client, server
def test_create(self):
try:
ep = select.epoll(16)
except OSError as e:
raise AssertionError(str(e))
self.assertTrue(ep.fileno() > 0, ep.fileno())
self.assertTrue(not ep.closed)
ep.close()
self.assertTrue(ep.closed)
self.assertRaises(ValueError, ep.fileno)
if hasattr(select, "EPOLL_CLOEXEC"):
select.epoll(-1, select.EPOLL_CLOEXEC).close()
select.epoll(flags=select.EPOLL_CLOEXEC).close()
select.epoll(flags=0).close()
def test_badcreate(self):
self.assertRaises(TypeError, select.epoll, 1, 2, 3)
self.assertRaises(TypeError, select.epoll, 'foo')
self.assertRaises(TypeError, select.epoll, None)
self.assertRaises(TypeError, select.epoll, ())
self.assertRaises(TypeError, select.epoll, ['foo'])
self.assertRaises(TypeError, select.epoll, {})
self.assertRaises(ValueError, select.epoll, 0)
self.assertRaises(ValueError, select.epoll, -2)
self.assertRaises(ValueError, select.epoll, sizehint=-2)
if hasattr(select, "EPOLL_CLOEXEC"):
self.assertRaises(OSError, select.epoll, flags=12356)
def test_context_manager(self):
with select.epoll(16) as ep:
self.assertGreater(ep.fileno(), 0)
self.assertFalse(ep.closed)
self.assertTrue(ep.closed)
self.assertRaises(ValueError, ep.fileno)
def test_add(self):
server, client = self._connected_pair()
ep = select.epoll(2)
try:
ep.register(server.fileno(), select.EPOLLIN | select.EPOLLOUT)
ep.register(client.fileno(), select.EPOLLIN | select.EPOLLOUT)
finally:
ep.close()
# adding by object w/ fileno works, too.
ep = select.epoll(2)
try:
ep.register(server, select.EPOLLIN | select.EPOLLOUT)
ep.register(client, select.EPOLLIN | select.EPOLLOUT)
finally:
ep.close()
ep = select.epoll(2)
try:
# TypeError: argument must be an int, or have a fileno() method.
self.assertRaises(TypeError, ep.register, object(),
select.EPOLLIN | select.EPOLLOUT)
self.assertRaises(TypeError, ep.register, None,
select.EPOLLIN | select.EPOLLOUT)
# ValueError: file descriptor cannot be a negative integer (-1)
self.assertRaises(ValueError, ep.register, -1,
select.EPOLLIN | select.EPOLLOUT)
# OSError: [Errno 9] Bad file descriptor
self.assertRaises(OSError, ep.register, 10000,
select.EPOLLIN | select.EPOLLOUT)
# registering twice also raises an exception
ep.register(server, select.EPOLLIN | select.EPOLLOUT)
self.assertRaises(OSError, ep.register, server,
select.EPOLLIN | select.EPOLLOUT)
finally:
ep.close()
def test_fromfd(self):
server, client = self._connected_pair()
with select.epoll(2) as ep:
ep2 = select.epoll.fromfd(ep.fileno())
ep2.register(server.fileno(), select.EPOLLIN | select.EPOLLOUT)
ep2.register(client.fileno(), select.EPOLLIN | select.EPOLLOUT)
events = ep.poll(1, 4)
events2 = ep2.poll(0.9, 4)
self.assertEqual(len(events), 2)
self.assertEqual(len(events2), 2)
try:
ep2.poll(1, 4)
except OSError as e:
self.assertEqual(e.args[0], errno.EBADF, e)
else:
self.fail("epoll on closed fd didn't raise EBADF")
def test_control_and_wait(self):
# create the epoll object
client, server = self._connected_pair()
ep = select.epoll(16)
ep.register(server.fileno(),
select.EPOLLIN | select.EPOLLOUT | select.EPOLLET)
ep.register(client.fileno(),
select.EPOLLIN | select.EPOLLOUT | select.EPOLLET)
# EPOLLOUT
now = time.monotonic()
events = ep.poll(1, 4)
then = time.monotonic()
self.assertFalse(then - now > 0.1, then - now)
expected = [(client.fileno(), select.EPOLLOUT),
(server.fileno(), select.EPOLLOUT)]
self.assertEqual(sorted(events), sorted(expected))
# no event
events = ep.poll(timeout=0.1, maxevents=4)
self.assertFalse(events)
# send: EPOLLIN and EPOLLOUT
client.sendall(b"Hello!")
server.sendall(b"world!!!")
# we might receive events one at a time, necessitating multiple calls to
# poll
events = []
for _ in support.busy_retry(support.SHORT_TIMEOUT):
now = time.monotonic()
events += ep.poll(1.0, 4)
then = time.monotonic()
self.assertFalse(then - now > 0.01)
if len(events) >= 2:
break
expected = [(client.fileno(), select.EPOLLIN | select.EPOLLOUT),
(server.fileno(), select.EPOLLIN | select.EPOLLOUT)]
self.assertEqual(sorted(events), sorted(expected))
# unregister, modify
ep.unregister(client.fileno())
ep.modify(server.fileno(), select.EPOLLOUT)
now = time.monotonic()
events = ep.poll(1, 4)
then = time.monotonic()
self.assertFalse(then - now > 0.01)
expected = [(server.fileno(), select.EPOLLOUT)]
self.assertEqual(events, expected)
def test_errors(self):
self.assertRaises(ValueError, select.epoll, -2)
self.assertRaises(ValueError, select.epoll().register, -1,
select.EPOLLIN)
def test_unregister_closed(self):
server, client = self._connected_pair()
fd = server.fileno()
ep = select.epoll(16)
ep.register(server)
now = time.monotonic()
events = ep.poll(1, 4)
then = time.monotonic()
self.assertFalse(then - now > 0.01)
server.close()
with self.assertRaises(OSError) as cm:
ep.unregister(fd)
self.assertEqual(cm.exception.errno, errno.EBADF)
def test_close(self):
open_file = open(__file__, "rb")
self.addCleanup(open_file.close)
fd = open_file.fileno()
epoll = select.epoll()
# test fileno() method and closed attribute
self.assertIsInstance(epoll.fileno(), int)
self.assertFalse(epoll.closed)
# test close()
epoll.close()
self.assertTrue(epoll.closed)
self.assertRaises(ValueError, epoll.fileno)
# close() can be called more than once
epoll.close()
# operations must fail with ValueError("I/O operation on closed ...")
self.assertRaises(ValueError, epoll.modify, fd, select.EPOLLIN)
self.assertRaises(ValueError, epoll.poll, 1.0)
self.assertRaises(ValueError, epoll.register, fd, select.EPOLLIN)
self.assertRaises(ValueError, epoll.unregister, fd)
def test_fd_non_inheritable(self):
epoll = select.epoll()
self.addCleanup(epoll.close)
self.assertEqual(os.get_inheritable(epoll.fileno()), False)
if __name__ == "__main__":
unittest.main()
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