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annotate Lib/test/test_timeout.py @ 66807:d28126ebd60d

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author Raymond Hettinger <python@rcn.com>
date Thu, 09 Dec 2010 16:41:54 +0000
parents 61a9ae522dcc
children f5b105c9f46b
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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 socket
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11
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12
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13 class CreationTestCase(unittest.TestCase):
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14 """Test case for socket.gettimeout() and socket.settimeout()"""
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15
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16 def setUp(self):
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17 self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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18
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19 def tearDown(self):
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20 self.sock.close()
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21
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22 def testObjectCreation(self):
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23 # Test Socket creation
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24 self.assertEqual(self.sock.gettimeout(), None,
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25 "timeout not disabled by default")
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26
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27 def testFloatReturnValue(self):
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28 # Test return value of gettimeout()
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29 self.sock.settimeout(7.345)
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30 self.assertEqual(self.sock.gettimeout(), 7.345)
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31
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32 self.sock.settimeout(3)
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33 self.assertEqual(self.sock.gettimeout(), 3)
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34
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35 self.sock.settimeout(None)
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36 self.assertEqual(self.sock.gettimeout(), None)
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37
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38 def testReturnType(self):
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39 # Test return type of gettimeout()
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40 self.sock.settimeout(1)
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41 self.assertEqual(type(self.sock.gettimeout()), type(1.0))
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42
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43 self.sock.settimeout(3.9)
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44 self.assertEqual(type(self.sock.gettimeout()), type(1.0))
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46 def testTypeCheck(self):
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47 # Test type checking by settimeout()
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48 self.sock.settimeout(0)
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49 self.sock.settimeout(0)
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50 self.sock.settimeout(0.0)
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51 self.sock.settimeout(None)
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52 self.assertRaises(TypeError, self.sock.settimeout, "")
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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, 0j)
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59 def testRangeCheck(self):
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60 # Test range checking by settimeout()
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61 self.assertRaises(ValueError, self.sock.settimeout, -1)
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62 self.assertRaises(ValueError, self.sock.settimeout, -1)
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63 self.assertRaises(ValueError, self.sock.settimeout, -1.0)
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64
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65 def testTimeoutThenBlocking(self):
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66 # Test settimeout() followed by setblocking()
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67 self.sock.settimeout(10)
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68 self.sock.setblocking(1)
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69 self.assertEqual(self.sock.gettimeout(), None)
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70 self.sock.setblocking(0)
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71 self.assertEqual(self.sock.gettimeout(), 0.0)
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72
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73 self.sock.settimeout(10)
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74 self.sock.setblocking(0)
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75 self.assertEqual(self.sock.gettimeout(), 0.0)
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76 self.sock.setblocking(1)
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77 self.assertEqual(self.sock.gettimeout(), None)
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78
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79 def testBlockingThenTimeout(self):
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80 # Test setblocking() followed by settimeout()
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81 self.sock.setblocking(0)
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82 self.sock.settimeout(1)
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83 self.assertEqual(self.sock.gettimeout(), 1)
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84
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85 self.sock.setblocking(1)
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86 self.sock.settimeout(1)
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87 self.assertEqual(self.sock.gettimeout(), 1)
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88
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89
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90 class TimeoutTestCase(unittest.TestCase):
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91 """Test case for socket.socket() timeout functions"""
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92
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93 # There are a number of tests here trying to make sure that an operation
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94 # doesn't take too much longer than expected. But competing machine
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95 # activity makes it inevitable that such tests will fail at times.
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96 # When fuzz was at 1.0, I (tim) routinely saw bogus failures on Win2K
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97 # and Win98SE. Boosting it to 2.0 helped a lot, but isn't a real
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98 # solution.
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99 fuzz = 2.0
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100
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101 def setUp(self):
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102 self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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103 self.addr_remote = ('www.python.org.', 80)
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104 self.localhost = '127.0.0.1'
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105
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106 def tearDown(self):
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107 self.sock.close()
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108
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109 def testConnectTimeout(self):
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110 # Choose a private address that is unlikely to exist to prevent
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111 # failures due to the connect succeeding before the timeout.
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112 # Use a dotted IP address to avoid including the DNS lookup time
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113 # with the connect time. This avoids failing the assertion that
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114 # the timeout occurred fast enough.
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115 addr = ('10.0.0.0', 12345)
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117 # Test connect() timeout
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118 _timeout = 0.001
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119 self.sock.settimeout(_timeout)
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120
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121 _t1 = time.time()
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122 self.assertRaises(socket.error, self.sock.connect, addr)
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123 _t2 = time.time()
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124
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125 _delta = abs(_t1 - _t2)
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126 self.assertTrue(_delta < _timeout + self.fuzz,
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127 "timeout (%g) is more than %g seconds more than expected (%g)"
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128 %(_delta, self.fuzz, _timeout))
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129
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130 def testRecvTimeout(self):
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131 # Test recv() timeout
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132 _timeout = 0.02
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133
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134 with support.transient_internet(self.addr_remote[0]):
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135 self.sock.connect(self.addr_remote)
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136 self.sock.settimeout(_timeout)
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137
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138 _t1 = time.time()
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139 self.assertRaises(socket.timeout, self.sock.recv, 1024)
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140 _t2 = time.time()
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141
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142 _delta = abs(_t1 - _t2)
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143 self.assertTrue(_delta < _timeout + self.fuzz,
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144 "timeout (%g) is %g seconds more than expected (%g)"
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145 %(_delta, self.fuzz, _timeout))
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146
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147 def testAcceptTimeout(self):
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148 # Test accept() timeout
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149 _timeout = 2
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150 self.sock.settimeout(_timeout)
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151 # Prevent "Address already in use" socket exceptions
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152 support.bind_port(self.sock, self.localhost)
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153 self.sock.listen(5)
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154
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155 _t1 = time.time()
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156 self.assertRaises(socket.error, self.sock.accept)
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157 _t2 = time.time()
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158
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159 _delta = abs(_t1 - _t2)
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160 self.assertTrue(_delta < _timeout + self.fuzz,
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161 "timeout (%g) is %g seconds more than expected (%g)"
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162 %(_delta, self.fuzz, _timeout))
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163
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164 def testRecvfromTimeout(self):
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165 # Test recvfrom() timeout
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166 _timeout = 2
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167 self.sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
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168 self.sock.settimeout(_timeout)
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169 # Prevent "Address already in use" socket exceptions
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170 support.bind_port(self.sock, self.localhost)
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171
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172 _t1 = time.time()
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173 self.assertRaises(socket.error, self.sock.recvfrom, 8192)
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174 _t2 = time.time()
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175
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176 _delta = abs(_t1 - _t2)
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177 self.assertTrue(_delta < _timeout + self.fuzz,
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178 "timeout (%g) is %g seconds more than expected (%g)"
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179 %(_delta, self.fuzz, _timeout))
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180
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181 def testSend(self):
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182 # Test send() timeout
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183 # couldn't figure out how to test it
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184 pass
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185
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186 def testSendto(self):
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187 # Test sendto() timeout
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188 # couldn't figure out how to test it
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189 pass
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190
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191 def testSendall(self):
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192 # Test sendall() timeout
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193 # couldn't figure out how to test it
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194 pass
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195
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196
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197 def test_main():
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198 support.requires('network')
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199 support.run_unittest(CreationTestCase, TimeoutTestCase)
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200
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201 if __name__ == "__main__":
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202 test_main()