Mercurial > repos > shellac > guppy_basecaller

annotate env/lib/python3.7/site-packages/psutil/tests/test_posix.py @ 0:26e78fe6e8c4 draft

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"planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
author shellac
date Sat, 02 May 2020 07:14:21 -0400
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0
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1 #!/usr/bin/env python3
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2 # -*- coding: utf-8 -*-
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3
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4 # Copyright (c) 2009, Giampaolo Rodola'. All rights reserved.
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5 # Use of this source code is governed by a BSD-style license that can be
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6 # found in the LICENSE file.
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7
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8 """POSIX specific tests."""
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9
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10 import datetime
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11 import errno
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12 import os
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13 import re
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14 import subprocess
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15 import time
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16
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17 import psutil
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18 from psutil import AIX
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19 from psutil import BSD
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20 from psutil import LINUX
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21 from psutil import MACOS
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22 from psutil import OPENBSD
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23 from psutil import POSIX
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24 from psutil import SUNOS
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25 from psutil.tests import CI_TESTING
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26 from psutil.tests import get_kernel_version
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27 from psutil.tests import get_test_subprocess
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28 from psutil.tests import HAS_NET_IO_COUNTERS
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29 from psutil.tests import mock
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30 from psutil.tests import PYTHON_EXE
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31 from psutil.tests import reap_children
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32 from psutil.tests import retry_on_failure
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33 from psutil.tests import sh
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34 from psutil.tests import skip_on_access_denied
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35 from psutil.tests import TRAVIS
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36 from psutil.tests import unittest
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37 from psutil.tests import wait_for_pid
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38 from psutil.tests import which
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39
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40
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41 def ps(fmt, pid=None):
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42 """
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43 Wrapper for calling the ps command with a little bit of cross-platform
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44 support for a narrow range of features.
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45 """
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46
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47 cmd = ['ps']
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48
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49 if LINUX:
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50 cmd.append('--no-headers')
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51
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52 if pid is not None:
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53 cmd.extend(['-p', str(pid)])
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54 else:
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55 if SUNOS or AIX:
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56 cmd.append('-A')
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57 else:
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58 cmd.append('ax')
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59
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60 if SUNOS:
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61 fmt_map = set(('command', 'comm', 'start', 'stime'))
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62 fmt = fmt_map.get(fmt, fmt)
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63
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64 cmd.extend(['-o', fmt])
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65
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66 output = sh(cmd)
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67
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68 if LINUX:
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69 output = output.splitlines()
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70 else:
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71 output = output.splitlines()[1:]
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72
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73 all_output = []
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74 for line in output:
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75 line = line.strip()
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76
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77 try:
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78 line = int(line)
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79 except ValueError:
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80 pass
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81
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82 all_output.append(line)
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83
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84 if pid is None:
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85 return all_output
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86 else:
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87 return all_output[0]
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88
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89 # ps "-o" field names differ wildly between platforms.
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90 # "comm" means "only executable name" but is not available on BSD platforms.
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91 # "args" means "command with all its arguments", and is also not available
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92 # on BSD platforms.
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93 # "command" is like "args" on most platforms, but like "comm" on AIX,
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94 # and not available on SUNOS.
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95 # so for the executable name we can use "comm" on Solaris and split "command"
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96 # on other platforms.
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97 # to get the cmdline (with args) we have to use "args" on AIX and
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98 # Solaris, and can use "command" on all others.
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99
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100
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101 def ps_name(pid):
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102 field = "command"
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103 if SUNOS:
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104 field = "comm"
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105 return ps(field, pid).split()[0]
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106
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107
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108 def ps_args(pid):
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109 field = "command"
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110 if AIX or SUNOS:
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111 field = "args"
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112 return ps(field, pid)
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113
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114
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115 def ps_rss(pid):
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116 field = "rss"
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117 if AIX:
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118 field = "rssize"
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119 return ps(field, pid)
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120
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121
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122 def ps_vsz(pid):
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123 field = "vsz"
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124 if AIX:
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125 field = "vsize"
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126 return ps(field, pid)
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127
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128
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129 @unittest.skipIf(not POSIX, "POSIX only")
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130 class TestProcess(unittest.TestCase):
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131 """Compare psutil results against 'ps' command line utility (mainly)."""
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132
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133 @classmethod
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134 def setUpClass(cls):
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135 cls.pid = get_test_subprocess([PYTHON_EXE, "-E", "-O"],
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136 stdin=subprocess.PIPE).pid
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137 wait_for_pid(cls.pid)
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138
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139 @classmethod
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140 def tearDownClass(cls):
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141 reap_children()
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142
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143 def test_ppid(self):
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144 ppid_ps = ps('ppid', self.pid)
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145 ppid_psutil = psutil.Process(self.pid).ppid()
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146 self.assertEqual(ppid_ps, ppid_psutil)
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147
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148 def test_uid(self):
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149 uid_ps = ps('uid', self.pid)
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150 uid_psutil = psutil.Process(self.pid).uids().real
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151 self.assertEqual(uid_ps, uid_psutil)
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152
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153 def test_gid(self):
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154 gid_ps = ps('rgid', self.pid)
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155 gid_psutil = psutil.Process(self.pid).gids().real
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156 self.assertEqual(gid_ps, gid_psutil)
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157
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158 def test_username(self):
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159 username_ps = ps('user', self.pid)
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160 username_psutil = psutil.Process(self.pid).username()
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161 self.assertEqual(username_ps, username_psutil)
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162
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163 def test_username_no_resolution(self):
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164 # Emulate a case where the system can't resolve the uid to
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165 # a username in which case psutil is supposed to return
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166 # the stringified uid.
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167 p = psutil.Process()
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168 with mock.patch("psutil.pwd.getpwuid", side_effect=KeyError) as fun:
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169 self.assertEqual(p.username(), str(p.uids().real))
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170 assert fun.called
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171
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172 @skip_on_access_denied()
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173 @retry_on_failure()
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174 def test_rss_memory(self):
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175 # give python interpreter some time to properly initialize
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176 # so that the results are the same
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177 time.sleep(0.1)
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178 rss_ps = ps_rss(self.pid)
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179 rss_psutil = psutil.Process(self.pid).memory_info()[0] / 1024
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180 self.assertEqual(rss_ps, rss_psutil)
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181
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182 @skip_on_access_denied()
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183 @retry_on_failure()
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184 def test_vsz_memory(self):
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185 # give python interpreter some time to properly initialize
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186 # so that the results are the same
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187 time.sleep(0.1)
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188 vsz_ps = ps_vsz(self.pid)
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189 vsz_psutil = psutil.Process(self.pid).memory_info()[1] / 1024
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190 self.assertEqual(vsz_ps, vsz_psutil)
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191
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192 def test_name(self):
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193 name_ps = ps_name(self.pid)
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194 # remove path if there is any, from the command
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195 name_ps = os.path.basename(name_ps).lower()
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196 name_psutil = psutil.Process(self.pid).name().lower()
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197 # ...because of how we calculate PYTHON_EXE; on MACOS this may
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198 # be "pythonX.Y".
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199 name_ps = re.sub(r"\d.\d", "", name_ps)
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200 name_psutil = re.sub(r"\d.\d", "", name_psutil)
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201 # ...may also be "python.X"
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202 name_ps = re.sub(r"\d", "", name_ps)
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203 name_psutil = re.sub(r"\d", "", name_psutil)
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204 self.assertEqual(name_ps, name_psutil)
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205
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206 def test_name_long(self):
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207 # On UNIX the kernel truncates the name to the first 15
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208 # characters. In such a case psutil tries to determine the
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209 # full name from the cmdline.
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210 name = "long-program-name"
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211 cmdline = ["long-program-name-extended", "foo", "bar"]
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212 with mock.patch("psutil._psplatform.Process.name",
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213 return_value=name):
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214 with mock.patch("psutil._psplatform.Process.cmdline",
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215 return_value=cmdline):
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216 p = psutil.Process()
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217 self.assertEqual(p.name(), "long-program-name-extended")
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218
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219 def test_name_long_cmdline_ad_exc(self):
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220 # Same as above but emulates a case where cmdline() raises
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221 # AccessDenied in which case psutil is supposed to return
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222 # the truncated name instead of crashing.
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223 name = "long-program-name"
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224 with mock.patch("psutil._psplatform.Process.name",
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225 return_value=name):
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226 with mock.patch("psutil._psplatform.Process.cmdline",
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227 side_effect=psutil.AccessDenied(0, "")):
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228 p = psutil.Process()
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229 self.assertEqual(p.name(), "long-program-name")
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230
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231 def test_name_long_cmdline_nsp_exc(self):
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232 # Same as above but emulates a case where cmdline() raises NSP
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233 # which is supposed to propagate.
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234 name = "long-program-name"
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235 with mock.patch("psutil._psplatform.Process.name",
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236 return_value=name):
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237 with mock.patch("psutil._psplatform.Process.cmdline",
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238 side_effect=psutil.NoSuchProcess(0, "")):
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239 p = psutil.Process()
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240 self.assertRaises(psutil.NoSuchProcess, p.name)
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241
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242 @unittest.skipIf(MACOS or BSD, 'ps -o start not available')
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243 def test_create_time(self):
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244 time_ps = ps('start', self.pid)
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245 time_psutil = psutil.Process(self.pid).create_time()
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246 time_psutil_tstamp = datetime.datetime.fromtimestamp(
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247 time_psutil).strftime("%H:%M:%S")
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248 # sometimes ps shows the time rounded up instead of down, so we check
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249 # for both possible values
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250 round_time_psutil = round(time_psutil)
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251 round_time_psutil_tstamp = datetime.datetime.fromtimestamp(
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252 round_time_psutil).strftime("%H:%M:%S")
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253 self.assertIn(time_ps, [time_psutil_tstamp, round_time_psutil_tstamp])
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254
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255 def test_exe(self):
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256 ps_pathname = ps_name(self.pid)
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257 psutil_pathname = psutil.Process(self.pid).exe()
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258 try:
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259 self.assertEqual(ps_pathname, psutil_pathname)
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260 except AssertionError:
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261 # certain platforms such as BSD are more accurate returning:
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262 # "/usr/local/bin/python2.7"
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263 # ...instead of:
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264 # "/usr/local/bin/python"
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265 # We do not want to consider this difference in accuracy
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266 # an error.
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267 adjusted_ps_pathname = ps_pathname[:len(ps_pathname)]
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268 self.assertEqual(ps_pathname, adjusted_ps_pathname)
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269
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270 def test_cmdline(self):
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271 ps_cmdline = ps_args(self.pid)
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272 psutil_cmdline = " ".join(psutil.Process(self.pid).cmdline())
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273 self.assertEqual(ps_cmdline, psutil_cmdline)
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274
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275 # On SUNOS "ps" reads niceness /proc/pid/psinfo which returns an
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276 # incorrect value (20); the real deal is getpriority(2) which
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277 # returns 0; psutil relies on it, see:
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278 # https://github.com/giampaolo/psutil/issues/1082
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279 # AIX has the same issue
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280 @unittest.skipIf(SUNOS, "not reliable on SUNOS")
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281 @unittest.skipIf(AIX, "not reliable on AIX")
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282 def test_nice(self):
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283 ps_nice = ps('nice', self.pid)
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284 psutil_nice = psutil.Process().nice()
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285 self.assertEqual(ps_nice, psutil_nice)
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286
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287 def test_num_fds(self):
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288 # Note: this fails from time to time; I'm keen on thinking
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289 # it doesn't mean something is broken
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290 def call(p, attr):
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291 args = ()
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292 attr = getattr(p, name, None)
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293 if attr is not None and callable(attr):
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294 if name == 'rlimit':
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295 args = (psutil.RLIMIT_NOFILE,)
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296 attr(*args)
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297 else:
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298 attr
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299
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300 p = psutil.Process(os.getpid())
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301 failures = []
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302 ignored_names = ['terminate', 'kill', 'suspend', 'resume', 'nice',
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303 'send_signal', 'wait', 'children', 'as_dict',
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304 'memory_info_ex', 'parent', 'parents']
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305 if LINUX and get_kernel_version() < (2, 6, 36):
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306 ignored_names.append('rlimit')
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307 if LINUX and get_kernel_version() < (2, 6, 23):
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308 ignored_names.append('num_ctx_switches')
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309 for name in dir(psutil.Process):
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310 if (name.startswith('_') or name in ignored_names):
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311 continue
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312 else:
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313 try:
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314 num1 = p.num_fds()
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315 for x in range(2):
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316 call(p, name)
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317 num2 = p.num_fds()
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318 except psutil.AccessDenied:
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319 pass
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320 else:
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321 if abs(num2 - num1) > 1:
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322 fail = "failure while processing Process.%s method " \
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323 "(before=%s, after=%s)" % (name, num1, num2)
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324 failures.append(fail)
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325 if failures:
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326 self.fail('\n' + '\n'.join(failures))
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327
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328
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329 @unittest.skipIf(not POSIX, "POSIX only")
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330 class TestSystemAPIs(unittest.TestCase):
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331 """Test some system APIs."""
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332
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333 @retry_on_failure()
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334 def test_pids(self):
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diff changeset
335 # Note: this test might fail if the OS is starting/killing
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336 # other processes in the meantime
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337 pids_ps = sorted(ps("pid"))
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338 pids_psutil = psutil.pids()
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339
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diff changeset
340 # on MACOS and OPENBSD ps doesn't show pid 0
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diff changeset
341 if MACOS or OPENBSD and 0 not in pids_ps:
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342 pids_ps.insert(0, 0)
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343
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344 # There will often be one more process in pids_ps for ps itself
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345 if len(pids_ps) - len(pids_psutil) > 1:
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diff changeset
346 difference = [x for x in pids_psutil if x not in pids_ps] + \
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diff changeset
347 [x for x in pids_ps if x not in pids_psutil]
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348 self.fail("difference: " + str(difference))
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349
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diff changeset
350 # for some reason ifconfig -a does not report all interfaces
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diff changeset
351 # returned by psutil
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diff changeset
352 @unittest.skipIf(SUNOS, "unreliable on SUNOS")
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353 @unittest.skipIf(TRAVIS, "unreliable on TRAVIS")
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diff changeset
354 @unittest.skipIf(not which('ifconfig'), "no ifconfig cmd")
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355 @unittest.skipIf(not HAS_NET_IO_COUNTERS, "not supported")
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356 def test_nic_names(self):
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357 output = sh("ifconfig -a")
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diff changeset
358 for nic in psutil.net_io_counters(pernic=True).keys():
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shellac
parents:
diff changeset
359 for line in output.split():
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diff changeset
360 if line.startswith(nic):
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diff changeset
361 break
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diff changeset
362 else:
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diff changeset
363 self.fail(
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
364 "couldn't find %s nic in 'ifconfig -a' output\n%s" % (
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shellac
parents:
diff changeset
365 nic, output))
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shellac
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diff changeset
366
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diff changeset
367 @unittest.skipIf(CI_TESTING and not psutil.users(), "unreliable on CI")
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parents:
diff changeset
368 @retry_on_failure()
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diff changeset
369 def test_users(self):
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370 out = sh("who")
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diff changeset
371 lines = out.split('\n')
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parents:
diff changeset
372 if not lines:
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diff changeset
373 raise self.skipTest("no users on this system")
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parents:
diff changeset
374 users = [x.split()[0] for x in lines]
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shellac
parents:
diff changeset
375 terminals = [x.split()[1] for x in lines]
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parents:
diff changeset
376 self.assertEqual(len(users), len(psutil.users()))
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parents:
diff changeset
377 for u in psutil.users():
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diff changeset
378 self.assertIn(u.name, users)
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diff changeset
379 self.assertIn(u.terminal, terminals)
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380
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381 def test_pid_exists_let_raise(self):
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382 # According to "man 2 kill" possible error values for kill
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383 # are (EINVAL, EPERM, ESRCH). Test that any other errno
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384 # results in an exception.
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385 with mock.patch("psutil._psposix.os.kill",
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386 side_effect=OSError(errno.EBADF, "")) as m:
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387 self.assertRaises(OSError, psutil._psposix.pid_exists, os.getpid())
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388 assert m.called
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389
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390 def test_os_waitpid_let_raise(self):
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391 # os.waitpid() is supposed to catch EINTR and ECHILD only.
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392 # Test that any other errno results in an exception.
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393 with mock.patch("psutil._psposix.os.waitpid",
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394 side_effect=OSError(errno.EBADF, "")) as m:
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395 self.assertRaises(OSError, psutil._psposix.wait_pid, os.getpid())
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396 assert m.called
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397
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398 def test_os_waitpid_eintr(self):
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399 # os.waitpid() is supposed to "retry" on EINTR.
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400 with mock.patch("psutil._psposix.os.waitpid",
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401 side_effect=OSError(errno.EINTR, "")) as m:
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402 self.assertRaises(
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403 psutil._psposix.TimeoutExpired,
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404 psutil._psposix.wait_pid, os.getpid(), timeout=0.01)
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405 assert m.called
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406
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407 def test_os_waitpid_bad_ret_status(self):
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408 # Simulate os.waitpid() returning a bad status.
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409 with mock.patch("psutil._psposix.os.waitpid",
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410 return_value=(1, -1)) as m:
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411 self.assertRaises(ValueError,
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412 psutil._psposix.wait_pid, os.getpid())
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413 assert m.called
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414
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415 # AIX can return '-' in df output instead of numbers, e.g. for /proc
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416 @unittest.skipIf(AIX, "unreliable on AIX")
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417 def test_disk_usage(self):
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418 def df(device):
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419 out = sh("df -k %s" % device).strip()
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420 line = out.split('\n')[1]
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421 fields = line.split()
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422 total = int(fields[1]) * 1024
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423 used = int(fields[2]) * 1024
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424 free = int(fields[3]) * 1024
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425 percent = float(fields[4].replace('%', ''))
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426 return (total, used, free, percent)
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427
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428 tolerance = 4 * 1024 * 1024 # 4MB
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429 for part in psutil.disk_partitions(all=False):
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430 usage = psutil.disk_usage(part.mountpoint)
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431 try:
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432 total, used, free, percent = df(part.device)
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433 except RuntimeError as err:
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434 # see:
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435 # https://travis-ci.org/giampaolo/psutil/jobs/138338464
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436 # https://travis-ci.org/giampaolo/psutil/jobs/138343361
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437 err = str(err).lower()
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438 if "no such file or directory" in err or \
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439 "raw devices not supported" in err or \
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440 "permission denied" in err:
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441 continue
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442 else:
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443 raise
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444 else:
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445 self.assertAlmostEqual(usage.total, total, delta=tolerance)
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446 self.assertAlmostEqual(usage.used, used, delta=tolerance)
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447 self.assertAlmostEqual(usage.free, free, delta=tolerance)
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448 self.assertAlmostEqual(usage.percent, percent, delta=1)
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449
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450
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451 if __name__ == '__main__':
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452 from psutil.tests.runner import run
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453 run(__file__)