Lib/test/test_timeout.py

"""Unit tests for socket timeout feature."""

import unittest
import test_support

import time
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(0L)
        self.sock.settimeout(0.0)
        self.sock.settimeout(None)
        self.assertRaises(TypeError, self.sock.settimeout, "")
        self.assertRaises(TypeError, self.sock.settimeout, u"")
        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, -1L)
        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):
    """Test case for socket.socket() timeout functions"""

    fuzz = 1.0

    def setUp(self):
        self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        self.addr_remote = ('www.google.com', 80)
        self.addr_local  = ('127.0.0.1', 25339)

    def tearDown(self):
        self.sock.close()

    def testConnectTimeout(self):
        "Test connect() timeout"
        _timeout = 0.02
        self.sock.settimeout(_timeout)

        _t1 = time.time()
        self.failUnlessRaises(socket.error, self.sock.connect,
                self.addr_remote)
        _t2 = time.time()

        _delta = abs(_t1 - _t2)
        self.assert_(_delta < _timeout + self.fuzz,
                     "timeout (%g) is %g seconds more than expected (%g)"
                     %(_delta, self.fuzz, _timeout))

    def testRecvTimeout(self):
        "Test recv() timeout"
        _timeout = 0.02
        self.sock.connect(self.addr_remote)
        self.sock.settimeout(_timeout)

        _t1 = time.time()
        self.failUnlessRaises(socket.error, self.sock.recv, 1024)
        _t2 = time.time()

        _delta = abs(_t1 - _t2)
        self.assert_(_delta < _timeout + self.fuzz,
                     "timeout (%g) is %g seconds more than expected (%g)"
                     %(_delta, self.fuzz, _timeout))

    def testAcceptTimeout(self):
        "Test accept() timeout"
        _timeout = 2
        self.sock.settimeout(_timeout)
        self.sock.bind(self.addr_local)
        self.sock.listen(5)

        _t1 = time.time()
        self.failUnlessRaises(socket.error, self.sock.accept)
        _t2 = time.time()

        _delta = abs(_t1 - _t2)
        self.assert_(_delta < _timeout + self.fuzz,
                     "timeout (%g) is %g seconds more than expected (%g)"
                     %(_delta, self.fuzz, _timeout))

    def testRecvfromTimeout(self):
        "Test recvfrom() timeout"
        _timeout = 2
        self.sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
        self.sock.settimeout(_timeout)
        self.sock.bind(self.addr_local)

        _t1 = time.time()
        self.failUnlessRaises(socket.error, self.sock.recvfrom, 8192)
        _t2 = time.time()

        _delta = abs(_t1 - _t2)
        self.assert_(_delta < _timeout + self.fuzz,
                     "timeout (%g) is %g seconds more than expected (%g)"
                     %(_delta, self.fuzz, _timeout))

    def testSend(self):
        "Test send() timeout"
        # couldn't figure out how to test it
        pass

    def testSendto(self):
        "Test sendto() timeout"
        # couldn't figure out how to test it
        pass

    def testSendall(self):
        "Test sendall() timeout"
        # couldn't figure out how to test it
        pass


def test_main():
    suite = unittest.TestSuite()
    suite.addTest(unittest.makeSuite(CreationTestCase))
    suite.addTest(unittest.makeSuite(TimeoutTestCase))
    test_support.run_suite(suite)

if __name__ == "__main__":
    test_main()