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Python Source  |  2011-03-15  |  2.9 KB  |  93 lines
  1. """Test script for the grp module."""
  2.  
  3. import grp
  4. import unittest
  5. from test import test_support
  6.  
  7. class GroupDatabaseTestCase(unittest.TestCase):
  8.  
  9.     def check_value(self, value):
  10.         # check that a grp tuple has the entries and
  11.         # attributes promised by the docs
  12.         self.assertEqual(len(value), 4)
  13.         self.assertEqual(value[0], value.gr_name)
  14.         self.assert_(isinstance(value.gr_name, basestring))
  15.         self.assertEqual(value[1], value.gr_passwd)
  16.         self.assert_(isinstance(value.gr_passwd, basestring))
  17.         self.assertEqual(value[2], value.gr_gid)
  18.         self.assert_(isinstance(value.gr_gid, int))
  19.         self.assertEqual(value[3], value.gr_mem)
  20.         self.assert_(isinstance(value.gr_mem, list))
  21.  
  22.     def test_values(self):
  23.         entries = grp.getgrall()
  24.  
  25.         for e in entries:
  26.             self.check_value(e)
  27.  
  28.         if len(entries) > 1000:  # Huge group file (NIS?) -- skip the rest
  29.             return
  30.  
  31.         for e in entries:
  32.             e2 = grp.getgrgid(e.gr_gid)
  33.             self.check_value(e2)
  34.             self.assertEqual(e2.gr_gid, e.gr_gid)
  35.             e2 = grp.getgrnam(e.gr_name)
  36.             self.check_value(e2)
  37.             # There are instances where getgrall() returns group names in
  38.             # lowercase while getgrgid() returns proper casing.
  39.             # Discovered on Ubuntu 5.04 (custom).
  40.             self.assertEqual(e2.gr_name.lower(), e.gr_name.lower())
  41.  
  42.     def test_errors(self):
  43.         self.assertRaises(TypeError, grp.getgrgid)
  44.         self.assertRaises(TypeError, grp.getgrnam)
  45.         self.assertRaises(TypeError, grp.getgrall, 42)
  46.  
  47.         # try to get some errors
  48.         bynames = {}
  49.         bygids = {}
  50.         for (n, p, g, mem) in grp.getgrall():
  51.             if not n or n == '+':
  52.                 continue # skip NIS entries etc.
  53.             bynames[n] = g
  54.             bygids[g] = n
  55.  
  56.         allnames = bynames.keys()
  57.         namei = 0
  58.         fakename = allnames[namei]
  59.         while fakename in bynames:
  60.             chars = list(fakename)
  61.             for i in xrange(len(chars)):
  62.                 if chars[i] == 'z':
  63.                     chars[i] = 'A'
  64.                     break
  65.                 elif chars[i] == 'Z':
  66.                     continue
  67.                 else:
  68.                     chars[i] = chr(ord(chars[i]) + 1)
  69.                     break
  70.             else:
  71.                 namei = namei + 1
  72.                 try:
  73.                     fakename = allnames[namei]
  74.                 except IndexError:
  75.                     # should never happen... if so, just forget it
  76.                     break
  77.             fakename = ''.join(chars)
  78.  
  79.         self.assertRaises(KeyError, grp.getgrnam, fakename)
  80.  
  81.         # Choose a non-existent gid.
  82.         fakegid = 4127
  83.         while fakegid in bygids:
  84.             fakegid = (fakegid * 3) % 0x10000
  85.  
  86.         self.assertRaises(KeyError, grp.getgrgid, fakegid)
  87.  
  88. def test_main():
  89.     test_support.run_unittest(GroupDatabaseTestCase)
  90.  
  91. if __name__ == "__main__":
  92.     test_main()
  93.