Mercurial > cpython-lru_cache-weakref

annotate Lib/test/test_timeout.py @ 70817:dd775b1561ba

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Fix markup.
author Georg Brandl <georg@python.org>
date Tue, 14 Jun 2011 21:09:55 +0200
parents 71e1a9961836
children 9c22222af1f9
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1 """Unit tests for socket timeout feature."""
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2
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3 import unittest
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4 from test import support
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5
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6 # This requires the 'network' resource as given on the regrtest command line.
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7 skip_expected = not support.is_resource_enabled('network')
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8
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9 import time
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10 import errno
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11 import socket
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12
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13
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14 class CreationTestCase(unittest.TestCase):
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15 """Test case for socket.gettimeout() and socket.settimeout()"""
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16
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17 def setUp(self):
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18 self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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19
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20 def tearDown(self):
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21 self.sock.close()
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22
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23 def testObjectCreation(self):
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24 # Test Socket creation
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25 self.assertEqual(self.sock.gettimeout(), None,
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26 "timeout not disabled by default")
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27
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28 def testFloatReturnValue(self):
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29 # Test return value of gettimeout()
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30 self.sock.settimeout(7.345)
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31 self.assertEqual(self.sock.gettimeout(), 7.345)
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32
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33 self.sock.settimeout(3)
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34 self.assertEqual(self.sock.gettimeout(), 3)
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35
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36 self.sock.settimeout(None)
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37 self.assertEqual(self.sock.gettimeout(), None)
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38
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39 def testReturnType(self):
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40 # Test return type of gettimeout()
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41 self.sock.settimeout(1)
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42 self.assertEqual(type(self.sock.gettimeout()), type(1.0))
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43
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44 self.sock.settimeout(3.9)
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45 self.assertEqual(type(self.sock.gettimeout()), type(1.0))
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47 def testTypeCheck(self):
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48 # Test type checking by settimeout()
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49 self.sock.settimeout(0)
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50 self.sock.settimeout(0)
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51 self.sock.settimeout(0.0)
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52 self.sock.settimeout(None)
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53 self.assertRaises(TypeError, self.sock.settimeout, "")
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54 self.assertRaises(TypeError, self.sock.settimeout, "")
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55 self.assertRaises(TypeError, self.sock.settimeout, ())
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56 self.assertRaises(TypeError, self.sock.settimeout, [])
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57 self.assertRaises(TypeError, self.sock.settimeout, {})
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58 self.assertRaises(TypeError, self.sock.settimeout, 0j)
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59
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60 def testRangeCheck(self):
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61 # Test range checking by settimeout()
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62 self.assertRaises(ValueError, self.sock.settimeout, -1)
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63 self.assertRaises(ValueError, self.sock.settimeout, -1)
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64 self.assertRaises(ValueError, self.sock.settimeout, -1.0)
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65
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66 def testTimeoutThenBlocking(self):
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67 # Test settimeout() followed by setblocking()
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68 self.sock.settimeout(10)
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69 self.sock.setblocking(1)
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70 self.assertEqual(self.sock.gettimeout(), None)
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71 self.sock.setblocking(0)
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72 self.assertEqual(self.sock.gettimeout(), 0.0)
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73
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74 self.sock.settimeout(10)
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75 self.sock.setblocking(0)
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76 self.assertEqual(self.sock.gettimeout(), 0.0)
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77 self.sock.setblocking(1)
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78 self.assertEqual(self.sock.gettimeout(), None)
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79
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80 def testBlockingThenTimeout(self):
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81 # Test setblocking() followed by settimeout()
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82 self.sock.setblocking(0)
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83 self.sock.settimeout(1)
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84 self.assertEqual(self.sock.gettimeout(), 1)
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85
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86 self.sock.setblocking(1)
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87 self.sock.settimeout(1)
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88 self.assertEqual(self.sock.gettimeout(), 1)
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89
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90
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91 class TimeoutTestCase(unittest.TestCase):
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92 # There are a number of tests here trying to make sure that an operation
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93 # doesn't take too much longer than expected. But competing machine
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94 # activity makes it inevitable that such tests will fail at times.
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95 # When fuzz was at 1.0, I (tim) routinely saw bogus failures on Win2K
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96 # and Win98SE. Boosting it to 2.0 helped a lot, but isn't a real
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97 # solution.
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98 fuzz = 2.0
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99
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100 localhost = '127.0.0.1'
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101
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102 def setUp(self):
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103 raise NotImplementedError()
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104
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105 tearDown = setUp
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106
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107 def _sock_operation(self, count, timeout, method, *args):
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108 """
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109 Test the specified socket method.
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110
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111 The method is run at most `count` times and must raise a socket.timeout
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112 within `timeout` + self.fuzz seconds.
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113 """
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114 self.sock.settimeout(timeout)
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115 method = getattr(self.sock, method)
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116 for i in range(count):
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117 t1 = time.time()
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118 try:
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119 method(*args)
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120 except socket.timeout as e:
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121 delta = time.time() - t1
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122 break
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123 else:
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124 self.fail('socket.timeout was not raised')
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125 # These checks should account for timing unprecision
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126 self.assertLess(delta, timeout + self.fuzz)
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127 self.assertGreater(delta, timeout - 1.0)
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128
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129
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130 class TCPTimeoutTestCase(TimeoutTestCase):
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131 """TCP test case for socket.socket() timeout functions"""
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132
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133 def setUp(self):
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134 self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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135 self.addr_remote = ('www.python.org.', 80)
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136
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137 def tearDown(self):
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138 self.sock.close()
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139
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140 def testConnectTimeout(self):
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141 # Choose a private address that is unlikely to exist to prevent
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142 # failures due to the connect succeeding before the timeout.
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143 # Use a dotted IP address to avoid including the DNS lookup time
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144 # with the connect time. This avoids failing the assertion that
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145 # the timeout occurred fast enough.
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146 addr = ('10.0.0.0', 12345)
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147 with support.transient_internet(addr[0]):
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148 self._sock_operation(1, 0.001, 'connect', addr)
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149
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150 def testRecvTimeout(self):
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151 # Test recv() timeout
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152 with support.transient_internet(self.addr_remote[0]):
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153 self.sock.connect(self.addr_remote)
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154 self._sock_operation(1, 1.5, 'recv', 1024)
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155
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156 def testAcceptTimeout(self):
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157 # Test accept() timeout
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158 support.bind_port(self.sock, self.localhost)
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159 self.sock.listen(5)
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160 self._sock_operation(1, 1.5, 'accept')
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161
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162 def testSend(self):
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163 # Test send() timeout
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164 with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as serv:
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165 support.bind_port(serv, self.localhost)
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166 serv.listen(5)
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167 self.sock.connect(serv.getsockname())
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168 # Send a lot of data in order to bypass buffering in the TCP stack.
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169 self._sock_operation(100, 1.5, 'send', b"X" * 200000)
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170
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171 def testSendto(self):
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172 # Test sendto() timeout
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173 with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as serv:
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174 support.bind_port(serv, self.localhost)
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175 serv.listen(5)
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176 self.sock.connect(serv.getsockname())
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177 # The address argument is ignored since we already connected.
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178 self._sock_operation(100, 1.5, 'sendto', b"X" * 200000,
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179 serv.getsockname())
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180
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181 def testSendall(self):
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182 # Test sendall() timeout
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183 with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as serv:
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184 support.bind_port(serv, self.localhost)
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185 serv.listen(5)
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186 self.sock.connect(serv.getsockname())
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187 # Send a lot of data in order to bypass buffering in the TCP stack.
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188 self._sock_operation(100, 1.5, 'sendall', b"X" * 200000)
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189
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190
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191 class UDPTimeoutTestCase(TimeoutTestCase):
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192 """UDP test case for socket.socket() timeout functions"""
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193
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194 def setUp(self):
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195 self.sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
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196
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197 def tearDown(self):
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198 self.sock.close()
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199
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200 def testRecvfromTimeout(self):
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201 # Test recvfrom() timeout
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202 # Prevent "Address already in use" socket exceptions
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203 support.bind_port(self.sock, self.localhost)
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204 self._sock_operation(1, 1.5, 'recvfrom', 1024)
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205
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206
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207 def test_main():
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208 support.requires('network')
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209 support.run_unittest(
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210 CreationTestCase,
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211 TCPTimeoutTestCase,
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212 UDPTimeoutTestCase,
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213 )
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214
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215 if __name__ == "__main__":
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216 test_main()