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"""Unit tests for socket timeout feature."""
import unittest
from test import support
# This requires the 'network' resource as given on the regrtest command line.
skip_expected = not support.is_resource_enabled('network')
import time
import errno
import socket
class CreationTestCase(unittest.TestCase):
"""Test case for socket.gettimeout() and socket.settimeout()"""
def setUp(self):
self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
def tearDown(self):
self.sock.close()
def testObjectCreation(self):
# Test Socket creation
self.assertEqual(self.sock.gettimeout(), None,
"timeout not disabled by default")
def testFloatReturnValue(self):
# Test return value of gettimeout()
self.sock.settimeout(7.345)
self.assertEqual(self.sock.gettimeout(), 7.345)
self.sock.settimeout(3)
self.assertEqual(self.sock.gettimeout(), 3)
self.sock.settimeout(None)
self.assertEqual(self.sock.gettimeout(), None)
def testReturnType(self):
# Test return type of gettimeout()
self.sock.settimeout(1)
self.assertEqual(type(self.sock.gettimeout()), type(1.0))
self.sock.settimeout(3.9)
self.assertEqual(type(self.sock.gettimeout()), type(1.0))
def testTypeCheck(self):
# Test type checking by settimeout()
self.sock.settimeout(0)
self.sock.settimeout(0)
self.sock.settimeout(0.0)
self.sock.settimeout(None)
self.assertRaises(TypeError, self.sock.settimeout, "")
self.assertRaises(TypeError, self.sock.settimeout, "")
self.assertRaises(TypeError, self.sock.settimeout, ())
self.assertRaises(TypeError, self.sock.settimeout, [])
self.assertRaises(TypeError, self.sock.settimeout, {})
self.assertRaises(TypeError, self.sock.settimeout, 0j)
def testRangeCheck(self):
# Test range checking by settimeout()
self.assertRaises(ValueError, self.sock.settimeout, -1)
self.assertRaises(ValueError, self.sock.settimeout, -1)
self.assertRaises(ValueError, self.sock.settimeout, -1.0)
def testTimeoutThenBlocking(self):
# Test settimeout() followed by setblocking()
self.sock.settimeout(10)
self.sock.setblocking(1)
self.assertEqual(self.sock.gettimeout(), None)
self.sock.setblocking(0)
self.assertEqual(self.sock.gettimeout(), 0.0)
self.sock.settimeout(10)
self.sock.setblocking(0)
self.assertEqual(self.sock.gettimeout(), 0.0)
self.sock.setblocking(1)
self.assertEqual(self.sock.gettimeout(), None)
def testBlockingThenTimeout(self):
# Test setblocking() followed by settimeout()
self.sock.setblocking(0)
self.sock.settimeout(1)
self.assertEqual(self.sock.gettimeout(), 1)
self.sock.setblocking(1)
self.sock.settimeout(1)
self.assertEqual(self.sock.gettimeout(), 1)
class TimeoutTestCase(unittest.TestCase):
# There are a number of tests here trying to make sure that an operation
# doesn't take too much longer than expected. But competing machine
# activity makes it inevitable that such tests will fail at times.
# When fuzz was at 1.0, I (tim) routinely saw bogus failures on Win2K
# and Win98SE. Boosting it to 2.0 helped a lot, but isn't a real
# solution.
fuzz = 2.0
localhost = '127.0.0.1'
def setUp(self):
raise NotImplementedError()
tearDown = setUp
def _sock_operation(self, count, timeout, method, *args):
"""
Test the specified socket method.
The method is run at most `count` times and must raise a socket.timeout
within `timeout` + self.fuzz seconds.
"""
self.sock.settimeout(timeout)
method = getattr(self.sock, method)
for i in range(count):
t1 = time.time()
try:
method(*args)
except socket.timeout as e:
delta = time.time() - t1
break
else:
self.fail('socket.timeout was not raised')
# These checks should account for timing unprecision
self.assertLess(delta, timeout + self.fuzz)
self.assertGreater(delta, timeout - 1.0)
class TCPTimeoutTestCase(TimeoutTestCase):
"""TCP test case for socket.socket() timeout functions"""
def setUp(self):
self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
self.addr_remote = ('www.python.org.', 80)
def tearDown(self):
self.sock.close()
def testConnectTimeout(self):
# Choose a private address that is unlikely to exist to prevent
# failures due to the connect succeeding before the timeout.
# Use a dotted IP address to avoid including the DNS lookup time
# with the connect time. This avoids failing the assertion that
# the timeout occurred fast enough.
addr = ('10.0.0.0', 12345)
with support.transient_internet(addr[0]):
self._sock_operation(1, 0.001, 'connect', addr)
def testRecvTimeout(self):
# Test recv() timeout
with support.transient_internet(self.addr_remote[0]):
self.sock.connect(self.addr_remote)
self._sock_operation(1, 1.5, 'recv', 1024)
def testAcceptTimeout(self):
# Test accept() timeout
support.bind_port(self.sock, self.localhost)
self.sock.listen(5)
self._sock_operation(1, 1.5, 'accept')
def testSend(self):
# Test send() timeout
with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as serv:
support.bind_port(serv, self.localhost)
serv.listen(5)
self.sock.connect(serv.getsockname())
# Send a lot of data in order to bypass buffering in the TCP stack.
self._sock_operation(100, 1.5, 'send', b"X" * 200000)
def testSendto(self):
# Test sendto() timeout
with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as serv:
support.bind_port(serv, self.localhost)
serv.listen(5)
self.sock.connect(serv.getsockname())
# The address argument is ignored since we already connected.
self._sock_operation(100, 1.5, 'sendto', b"X" * 200000,
serv.getsockname())
def testSendall(self):
# Test sendall() timeout
with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as serv:
support.bind_port(serv, self.localhost)
serv.listen(5)
self.sock.connect(serv.getsockname())
# Send a lot of data in order to bypass buffering in the TCP stack.
self._sock_operation(100, 1.5, 'sendall', b"X" * 200000)
class UDPTimeoutTestCase(TimeoutTestCase):
"""UDP test case for socket.socket() timeout functions"""
def setUp(self):
self.sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
def tearDown(self):
self.sock.close()
def testRecvfromTimeout(self):
# Test recvfrom() timeout
# Prevent "Address already in use" socket exceptions
support.bind_port(self.sock, self.localhost)
self._sock_operation(1, 1.5, 'recvfrom', 1024)
def test_main():
support.requires('network')
support.run_unittest(
CreationTestCase,
TCPTimeoutTestCase,
UDPTimeoutTestCase,
)
if __name__ == "__main__":
test_main()
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