Lib/test/test_pwd.py

   1 import sys
   2 import unittest
   3 from test import test_support
   4
   5 pwd = test_support.import_module('pwd')
   6
   7 class PwdTest(unittest.TestCase):
   8
   9     def test_values(self):
  10         entries = pwd.getpwall()
  11         entriesbyname = {}
  12         entriesbyuid = {}
  13
  14         for e in entries:
  15             self.assertEqual(len(e), 7)
  16             self.assertEqual(e[0], e.pw_name)
  17             self.assertIsInstance(e.pw_name, basestring)
  18             self.assertEqual(e[1], e.pw_passwd)
  19             self.assertIsInstance(e.pw_passwd, basestring)
  20             self.assertEqual(e[2], e.pw_uid)
  21             self.assertIsInstance(e.pw_uid, int)
  22             self.assertEqual(e[3], e.pw_gid)
  23             self.assertIsInstance(e.pw_gid, int)
  24             self.assertEqual(e[4], e.pw_gecos)
  25             self.assertIsInstance(e.pw_gecos, basestring)
  26             self.assertEqual(e[5], e.pw_dir)
  27             self.assertIsInstance(e.pw_dir, basestring)
  28             self.assertEqual(e[6], e.pw_shell)
  29             self.assertIsInstance(e.pw_shell, basestring)
  30
  31             # The following won't work, because of duplicate entries
  32             # for one uid
  33             #    self.assertEqual(pwd.getpwuid(e.pw_uid), e)
  34             # instead of this collect all entries for one uid
  35             # and check afterwards
  36             entriesbyname.setdefault(e.pw_name, []).append(e)
  37             entriesbyuid.setdefault(e.pw_uid, []).append(e)
  38
  39         if len(entries) > 1000:  # Huge passwd file (NIS?) -- skip the rest
  40             return
  41
  42         # check whether the entry returned by getpwuid()
  43         # for each uid is among those from getpwall() for this uid
  44         for e in entries:
  45             if not e[0] or e[0] == '+':
  46                 continue # skip NIS entries etc.
  47             self.assertIn(pwd.getpwnam(e.pw_name), entriesbyname[e.pw_name])
  48             self.assertIn(pwd.getpwuid(e.pw_uid), entriesbyuid[e.pw_uid])
  49
  50     def test_errors(self):
  51         self.assertRaises(TypeError, pwd.getpwuid)
  52         self.assertRaises(TypeError, pwd.getpwnam)
  53         self.assertRaises(TypeError, pwd.getpwall, 42)
  54
  55         # try to get some errors
  56         bynames = {}
  57         byuids = {}
  58         for (n, p, u, g, gecos, d, s) in pwd.getpwall():
  59             bynames[n] = u
  60             byuids[u] = n
  61
  62         allnames = bynames.keys()
  63         namei = 0
  64         fakename = allnames[namei]
  65         while fakename in bynames:
  66             chars = list(fakename)
  67             for i in xrange(len(chars)):
  68                 if chars[i] == 'z':
  69                     chars[i] = 'A'
  70                     break
  71                 elif chars[i] == 'Z':
  72                     continue
  73                 else:
  74                     chars[i] = chr(ord(chars[i]) + 1)
  75                     break
  76             else:
  77                 namei = namei + 1
  78                 try:
  79                     fakename = allnames[namei]
  80                 except IndexError:
  81                     # should never happen... if so, just forget it
  82                     break
  83             fakename = ''.join(chars)
  84
  85         self.assertRaises(KeyError, pwd.getpwnam, fakename)
  86
  87         # In some cases, byuids isn't a complete list of all users in the
  88         # system, so if we try to pick a value not in byuids (via a perturbing
  89         # loop, say), pwd.getpwuid() might still be able to find data for that
  90         # uid. Using sys.maxint may provoke the same problems, but hopefully
  91         # it will be a more repeatable failure.
  92         fakeuid = sys.maxint
  93         self.assertNotIn(fakeuid, byuids)
  94         self.assertRaises(KeyError, pwd.getpwuid, fakeuid)
  95
  96 def test_main():
  97     test_support.run_unittest(PwdTest)
  98
  99 if __name__ == "__main__":
 100     test_main()