netutil_test.py
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00001 from __future__ import absolute_import, division, print_function, with_statement
00002 
00003 import os
00004 import signal
00005 import socket
00006 from subprocess import Popen
00007 import sys
00008 import time
00009 
00010 from tornado.netutil import BlockingResolver, ThreadedResolver, is_valid_ip, bind_sockets
00011 from tornado.stack_context import ExceptionStackContext
00012 from tornado.testing import AsyncTestCase, gen_test
00013 from tornado.test.util import unittest, skipIfNoNetwork
00014 
00015 try:
00016     from concurrent import futures
00017 except ImportError:
00018     futures = None
00019 
00020 try:
00021     import pycares
00022 except ImportError:
00023     pycares = None
00024 else:
00025     from tornado.platform.caresresolver import CaresResolver
00026 
00027 try:
00028     import twisted
00029     import twisted.names
00030 except ImportError:
00031     twisted = None
00032 else:
00033     from tornado.platform.twisted import TwistedResolver
00034 
00035 
00036 class _ResolverTestMixin(object):
00037     def skipOnCares(self):
00038         # Some DNS-hijacking ISPs (e.g. Time Warner) return non-empty results
00039         # with an NXDOMAIN status code.  Most resolvers treat this as an error;
00040         # C-ares returns the results, making the "bad_host" tests unreliable.
00041         # C-ares will try to resolve even malformed names, such as the
00042         # name with spaces used in this test.
00043         if self.resolver.__class__.__name__ == 'CaresResolver':
00044             self.skipTest("CaresResolver doesn't recognize fake NXDOMAIN")
00045 
00046     def test_localhost(self):
00047         self.resolver.resolve('localhost', 80, callback=self.stop)
00048         result = self.wait()
00049         self.assertIn((socket.AF_INET, ('127.0.0.1', 80)), result)
00050 
00051     @gen_test
00052     def test_future_interface(self):
00053         addrinfo = yield self.resolver.resolve('localhost', 80,
00054                                                socket.AF_UNSPEC)
00055         self.assertIn((socket.AF_INET, ('127.0.0.1', 80)),
00056                       addrinfo)
00057 
00058     def test_bad_host(self):
00059         self.skipOnCares()
00060         def handler(exc_typ, exc_val, exc_tb):
00061             self.stop(exc_val)
00062             return True  # Halt propagation.
00063 
00064         with ExceptionStackContext(handler):
00065             self.resolver.resolve('an invalid domain', 80, callback=self.stop)
00066 
00067         result = self.wait()
00068         self.assertIsInstance(result, Exception)
00069 
00070     @gen_test
00071     def test_future_interface_bad_host(self):
00072         self.skipOnCares()
00073         with self.assertRaises(Exception):
00074             yield self.resolver.resolve('an invalid domain', 80,
00075                                         socket.AF_UNSPEC)
00076 
00077 
00078 @skipIfNoNetwork
00079 class BlockingResolverTest(AsyncTestCase, _ResolverTestMixin):
00080     def setUp(self):
00081         super(BlockingResolverTest, self).setUp()
00082         self.resolver = BlockingResolver(io_loop=self.io_loop)
00083 
00084 
00085 @skipIfNoNetwork
00086 @unittest.skipIf(futures is None, "futures module not present")
00087 class ThreadedResolverTest(AsyncTestCase, _ResolverTestMixin):
00088     def setUp(self):
00089         super(ThreadedResolverTest, self).setUp()
00090         self.resolver = ThreadedResolver(io_loop=self.io_loop)
00091 
00092     def tearDown(self):
00093         self.resolver.close()
00094         super(ThreadedResolverTest, self).tearDown()
00095 
00096 
00097 @skipIfNoNetwork
00098 @unittest.skipIf(futures is None, "futures module not present")
00099 @unittest.skipIf(sys.platform == 'win32', "preexec_fn not available on win32")
00100 class ThreadedResolverImportTest(unittest.TestCase):
00101     def test_import(self):
00102         TIMEOUT = 5
00103 
00104         # Test for a deadlock when importing a module that runs the
00105         # ThreadedResolver at import-time. See resolve_test.py for
00106         # full explanation.
00107         command = [
00108             sys.executable,
00109             '-c',
00110             'import tornado.test.resolve_test_helper']
00111 
00112         start = time.time()
00113         popen = Popen(command, preexec_fn=lambda: signal.alarm(TIMEOUT))
00114         while time.time() - start < TIMEOUT:
00115             return_code = popen.poll()
00116             if return_code is not None:
00117                 self.assertEqual(0, return_code)
00118                 return  # Success.
00119             time.sleep(0.05)
00120 
00121         self.fail("import timed out")
00122 
00123 
00124 @skipIfNoNetwork
00125 @unittest.skipIf(pycares is None, "pycares module not present")
00126 class CaresResolverTest(AsyncTestCase, _ResolverTestMixin):
00127     def setUp(self):
00128         super(CaresResolverTest, self).setUp()
00129         self.resolver = CaresResolver(io_loop=self.io_loop)
00130 
00131 
00132 @skipIfNoNetwork
00133 @unittest.skipIf(twisted is None, "twisted module not present")
00134 @unittest.skipIf(getattr(twisted, '__version__', '0.0') < "12.1", "old version of twisted")
00135 class TwistedResolverTest(AsyncTestCase, _ResolverTestMixin):
00136     def setUp(self):
00137         super(TwistedResolverTest, self).setUp()
00138         self.resolver = TwistedResolver(io_loop=self.io_loop)
00139 
00140 
00141 class IsValidIPTest(unittest.TestCase):
00142     def test_is_valid_ip(self):
00143         self.assertTrue(is_valid_ip('127.0.0.1'))
00144         self.assertTrue(is_valid_ip('4.4.4.4'))
00145         self.assertTrue(is_valid_ip('::1'))
00146         self.assertTrue(is_valid_ip('2620:0:1cfe:face:b00c::3'))
00147         self.assertTrue(not is_valid_ip('www.google.com'))
00148         self.assertTrue(not is_valid_ip('localhost'))
00149         self.assertTrue(not is_valid_ip('4.4.4.4<'))
00150         self.assertTrue(not is_valid_ip(' 127.0.0.1'))
00151         self.assertTrue(not is_valid_ip(''))
00152         self.assertTrue(not is_valid_ip(' '))
00153         self.assertTrue(not is_valid_ip('\n'))
00154         self.assertTrue(not is_valid_ip('\x00'))
00155 
00156 
00157 class TestPortAllocation(unittest.TestCase):
00158     def test_same_port_allocation(self):
00159         if 'TRAVIS' in os.environ:
00160             self.skipTest("dual-stack servers often have port conflicts on travis")
00161         sockets = bind_sockets(None, 'localhost')
00162         try:
00163             port = sockets[0].getsockname()[1]
00164             self.assertTrue(all(s.getsockname()[1] == port
00165                                 for s in sockets[1:]))
00166         finally:
00167             for sock in sockets:
00168                 sock.close()


rosbridge_server
Author(s): Jonathan Mace
autogenerated on Thu Jun 6 2019 21:51:50