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