Lib/test/test_commands.py

   1 '''
   2    Tests for commands module
   3    Nick Mathewson
   4 '''
   5 import unittest
   6 import os, tempfile, re
   7
   8 from test_support import TestSkipped, run_unittest
   9 from commands import *
  10
  11 # The module says:
  12 #   "NB This only works (and is only relevant) for UNIX."
  13 #
  14 # Actually, getoutput should work on any platform with an os.popen, but
  15 # I'll take the comment as given, and skip this suite.
  16
  17 if os.name != 'posix':
  18     raise TestSkipped('Not posix; skipping test_commands')
  19
  20
  21 class CommandTests(unittest.TestCase):
  22
  23     def test_getoutput(self):
  24         self.assertEquals(getoutput('echo xyzzy'), 'xyzzy')
  25         self.assertEquals(getstatusoutput('echo xyzzy'), (0, 'xyzzy'))
  26
  27         # we use mktemp in the next line to get a filename which we
  28         # _know_ won't exist.  This is guaranteed to fail.
  29         status, output = getstatusoutput('cat ' + tempfile.mktemp())
  30         self.assertNotEquals(status, 0)
  31
  32     def test_getstatus(self):
  33         # This pattern should match 'ls -ld /.' on any posix
  34         # system, however perversely configured.
  35         pat = r'''d.........   # It is a directory.
  36                   \s+\d+       # It has some number of links.
  37                   \s+\w+\s+\w+ # It has a user and group, which may
  38                                #     be named anything.
  39                   \s+\d+       # It has a size.
  40                   [^/]*        # Skip the date.
  41                   /.           # and end with the name of the file.
  42                '''
  43
  44         self.assert_(re.match(pat, getstatus("/."), re.VERBOSE))
  45
  46
  47 def test_main():
  48     run_unittest(CommandTests)
  49
  50
  51 if __name__ == "__main__":
  52     test_main()