c 20012006 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 andor 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 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 s or 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 adding by object w fileno works too typeerror argument must be an int or have a fileno method valueerror file descriptor cannot be a negative integer 1 oserror errno 9 bad file descriptor registering twice also raises an exception create the epoll object epollout no event send epollin and epollout we might receive events one at a time necessitating multiple calls to poll unregister modify test fileno method and closed attribute test close close can be called more than once operations must fail with valueerrorio operation on closed 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 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 s or 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 adding by object w fileno works too typeerror argument must be an int or have a fileno method valueerror file descriptor cannot be a negative integer 1 oserror errno 9 bad file descriptor registering twice also raises an exception create the epoll object epollout no event send epollin and epollout we might receive events one at a time necessitating multiple calls to poll unregister modify test fileno method and closed attribute test close close can be called more than once operations must fail with valueerror i o operation on closed
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()

        
        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:
            
            self.assertRaises(TypeError, ep.register, object(),
                              select.EPOLLIN | select.EPOLLOUT)
            self.assertRaises(TypeError, ep.register, None,
                              select.EPOLLIN | select.EPOLLOUT)
            
            self.assertRaises(ValueError, ep.register, -1,
                              select.EPOLLIN | select.EPOLLOUT)
            
            self.assertRaises(OSError, ep.register, 10000,
                              select.EPOLLIN | select.EPOLLOUT)
            
            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):
        
        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)

        
        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))

        
        events = ep.poll(timeout=0.1, maxevents=4)
        self.assertFalse(events)

        
        client.sendall(b"Hello!")
        server.sendall(b"world!!!")

        
        
        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))

        
        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()

        
        self.assertIsInstance(epoll.fileno(), int)
        self.assertFalse(epoll.closed)

        
        epoll.close()
        self.assertTrue(epoll.closed)
        self.assertRaises(ValueError, epoll.fileno)

        
        epoll.close()

        
        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()