Mercurial > cpython-lru_cache-weakref

annotate Lib/test/test_popen2.py @ 54294:dba767bc3155 legacy-trunk

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remove mention of old ctypes version
author Benjamin Peterson <benjamin@python.org>
date Sat, 23 May 2009 20:59:09 +0000
parents 228cfb6e2900
children 1ea03f86e081
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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337733ce9593 Test for popen2 module, by Chris Tismer.
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1 #! /usr/bin/env python
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2 """Test script for popen2.py"""
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3
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4 import warnings
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5 warnings.filterwarnings("ignore", ".*popen2 module is deprecated.*",
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6 DeprecationWarning)
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7 warnings.filterwarnings("ignore", "os\.popen. is deprecated.*",
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8 DeprecationWarning)
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9
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10 import os
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11 import sys
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12 import unittest
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13 import popen2
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14
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15 from test.test_support import run_unittest, reap_children
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16
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17 if sys.platform[:4] == 'beos' or sys.platform[:6] == 'atheos':
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18 # Locks get messed up or something. Generally we're supposed
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19 # to avoid mixing "posix" fork & exec with native threads, and
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20 # they may be right about that after all.
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21 raise unittest.SkipTest("popen2() doesn't work on " + sys.platform)
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22
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23 # if we don't have os.popen, check that
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24 # we have os.fork. if not, skip the test
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25 # (by raising an ImportError)
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26 try:
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27 from os import popen
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28 del popen
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29 except ImportError:
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30 from os import fork
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31 del fork
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32
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33 class Popen2Test(unittest.TestCase):
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34 cmd = "cat"
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35 if os.name == "nt":
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36 cmd = "more"
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37 teststr = "ab cd\n"
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38 # "more" doesn't act the same way across Windows flavors,
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39 # sometimes adding an extra newline at the start or the
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40 # end. So we strip whitespace off both ends for comparison.
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41 expected = teststr.strip()
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42
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43 def setUp(self):
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44 popen2._cleanup()
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45 # When the test runs, there shouldn't be any open pipes
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46 self.assertFalse(popen2._active, "Active pipes when test starts" +
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47 repr([c.cmd for c in popen2._active]))
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48
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49 def tearDown(self):
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50 for inst in popen2._active:
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51 inst.wait()
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52 popen2._cleanup()
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53 self.assertFalse(popen2._active, "_active not empty")
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54 reap_children()
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55
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56 def validate_output(self, teststr, expected_out, r, w, e=None):
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57 w.write(teststr)
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58 w.close()
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59 got = r.read()
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60 self.assertEquals(expected_out, got.strip(), "wrote %r read %r" %
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61 (teststr, got))
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62
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63 if e is not None:
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64 got = e.read()
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65 self.assertFalse(got, "unexpected %r on stderr" % got)
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66
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67 def test_popen2(self):
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68 r, w = popen2.popen2(self.cmd)
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69 self.validate_output(self.teststr, self.expected, r, w)
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70
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71 def test_popen3(self):
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72 if os.name == 'posix':
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73 r, w, e = popen2.popen3([self.cmd])
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74 self.validate_output(self.teststr, self.expected, r, w, e)
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75
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76 r, w, e = popen2.popen3(self.cmd)
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77 self.validate_output(self.teststr, self.expected, r, w, e)
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78
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79 def test_os_popen2(self):
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80 # same test as test_popen2(), but using the os.popen*() API
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81 w, r = os.popen2(self.cmd)
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82 self.validate_output(self.teststr, self.expected, r, w)
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83
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84 def test_os_popen3(self):
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85 # same test as test_popen3(), but using the os.popen*() API
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86 if os.name == 'posix':
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87 w, r, e = os.popen3([self.cmd])
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88 self.validate_output(self.teststr, self.expected, r, w, e)
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89
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90 w, r, e = os.popen3(self.cmd)
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91 self.validate_output(self.teststr, self.expected, r, w, e)
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92
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93
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94 def test_main():
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95 run_unittest(Popen2Test)
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96
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97 if __name__ == "__main__":
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98 test_main()