1import sys
2import unittest
3from test import test_support
4
5pwd = test_support.import_module('pwd')
6
7class 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, long))
22            self.assertEqual(e[3], e.pw_gid)
23            self.assertIsInstance(e.pw_gid, (int, long))
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.getpwuid, 3.14)
53        self.assertRaises(TypeError, pwd.getpwnam)
54        self.assertRaises(TypeError, pwd.getpwnam, 42)
55        self.assertRaises(TypeError, pwd.getpwall, 42)
56
57        # try to get some errors
58        bynames = {}
59        byuids = {}
60        for (n, p, u, g, gecos, d, s) in pwd.getpwall():
61            bynames[n] = u
62            byuids[u] = n
63
64        allnames = bynames.keys()
65        namei = 0
66        fakename = allnames[namei]
67        while fakename in bynames:
68            chars = list(fakename)
69            for i in xrange(len(chars)):
70                if chars[i] == 'z':
71                    chars[i] = 'A'
72                    break
73                elif chars[i] == 'Z':
74                    continue
75                else:
76                    chars[i] = chr(ord(chars[i]) + 1)
77                    break
78            else:
79                namei = namei + 1
80                try:
81                    fakename = allnames[namei]
82                except IndexError:
83                    # should never happen... if so, just forget it
84                    break
85            fakename = ''.join(chars)
86
87        self.assertRaises(KeyError, pwd.getpwnam, fakename)
88
89        # In some cases, byuids isn't a complete list of all users in the
90        # system, so if we try to pick a value not in byuids (via a perturbing
91        # loop, say), pwd.getpwuid() might still be able to find data for that
92        # uid. Using sys.maxint may provoke the same problems, but hopefully
93        # it will be a more repeatable failure.
94        fakeuid = sys.maxint
95        self.assertNotIn(fakeuid, byuids)
96        self.assertRaises(KeyError, pwd.getpwuid, fakeuid)
97
98        # -1 shouldn't be a valid uid because it has a special meaning in many
99        # uid-related functions
100        self.assertRaises(KeyError, pwd.getpwuid, -1)
101        # should be out of uid_t range
102        self.assertRaises(KeyError, pwd.getpwuid, 2**128)
103        self.assertRaises(KeyError, pwd.getpwuid, -2**128)
104
105def test_main():
106    test_support.run_unittest(PwdTest)
107
108if __name__ == "__main__":
109    test_main()
110