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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
12        for e in entries:
13            self.assertEqual(len(e), 7)
14            self.assertEqual(e[0], e.pw_name)
15            self.assertIsInstance(e.pw_name, basestring)
16            self.assertEqual(e[1], e.pw_passwd)
17            self.assertIsInstance(e.pw_passwd, basestring)
18            self.assertEqual(e[2], e.pw_uid)
19            self.assertIsInstance(e.pw_uid, (int, long))
20            self.assertEqual(e[3], e.pw_gid)
21            self.assertIsInstance(e.pw_gid, (int, long))
22            self.assertEqual(e[4], e.pw_gecos)
23            self.assertIsInstance(e.pw_gecos, basestring)
24            self.assertEqual(e[5], e.pw_dir)
25            self.assertIsInstance(e.pw_dir, basestring)
26            self.assertEqual(e[6], e.pw_shell)
27            self.assertIsInstance(e.pw_shell, basestring)
28
29            # The following won't work, because of duplicate entries
30            # for one uid
31            #    self.assertEqual(pwd.getpwuid(e.pw_uid), e)
32            # instead of this collect all entries for one uid
33            # and check afterwards (done in test_values_extended)
34
35    def test_values_extended(self):
36        entries = pwd.getpwall()
37        entriesbyname = {}
38        entriesbyuid = {}
39
40        if len(entries) > 1000:  # Huge passwd file (NIS?) -- skip this test
41            self.skipTest('passwd file is huge; extended test skipped')
42
43        for e in entries:
44            entriesbyname.setdefault(e.pw_name, []).append(e)
45            entriesbyuid.setdefault(e.pw_uid, []).append(e)
46
47        # check whether the entry returned by getpwuid()
48        # for each uid is among those from getpwall() for this uid
49        for e in entries:
50            if not e[0] or e[0] == '+':
51                continue # skip NIS entries etc.
52            self.assertIn(pwd.getpwnam(e.pw_name), entriesbyname[e.pw_name])
53            self.assertIn(pwd.getpwuid(e.pw_uid), entriesbyuid[e.pw_uid])
54
55    def test_errors(self):
56        self.assertRaises(TypeError, pwd.getpwuid)
57        self.assertRaises(TypeError, pwd.getpwuid, 3.14)
58        self.assertRaises(TypeError, pwd.getpwnam)
59        self.assertRaises(TypeError, pwd.getpwnam, 42)
60        self.assertRaises(TypeError, pwd.getpwall, 42)
61
62        # try to get some errors
63        bynames = {}
64        byuids = {}
65        for (n, p, u, g, gecos, d, s) in pwd.getpwall():
66            bynames[n] = u
67            byuids[u] = n
68
69        allnames = bynames.keys()
70        namei = 0
71        fakename = allnames[namei]
72        while fakename in bynames:
73            chars = list(fakename)
74            for i in xrange(len(chars)):
75                if chars[i] == 'z':
76                    chars[i] = 'A'
77                    break
78                elif chars[i] == 'Z':
79                    continue
80                else:
81                    chars[i] = chr(ord(chars[i]) + 1)
82                    break
83            else:
84                namei = namei + 1
85                try:
86                    fakename = allnames[namei]
87                except IndexError:
88                    # should never happen... if so, just forget it
89                    break
90            fakename = ''.join(chars)
91
92        self.assertRaises(KeyError, pwd.getpwnam, fakename)
93
94        # In some cases, byuids isn't a complete list of all users in the
95        # system, so if we try to pick a value not in byuids (via a perturbing
96        # loop, say), pwd.getpwuid() might still be able to find data for that
97        # uid. Using sys.maxint may provoke the same problems, but hopefully
98        # it will be a more repeatable failure.
99        fakeuid = sys.maxint
100        self.assertNotIn(fakeuid, byuids)
101        self.assertRaises(KeyError, pwd.getpwuid, fakeuid)
102
103        # -1 shouldn't be a valid uid because it has a special meaning in many
104        # uid-related functions
105        self.assertRaises(KeyError, pwd.getpwuid, -1)
106        # should be out of uid_t range
107        self.assertRaises(KeyError, pwd.getpwuid, 2**128)
108        self.assertRaises(KeyError, pwd.getpwuid, -2**128)
109
110def test_main():
111    test_support.run_unittest(PwdTest)
112
113if __name__ == "__main__":
114    test_main()
115