# 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()