import unittest

from test import test_support

import pwd

class PwdTest(unittest.TestCase):

    def test_values(self):

        entries = pwd.getpwall()

        entriesbyname = {}

        entriesbyuid = {}

        for e in entries:

            self.assertEqual(len(e), 7)

            self.assertEqual(e[0], e.pw_name)

            self.assert_(isinstance(e.pw_name, basestring))

            self.assertEqual(e[1], e.pw_passwd)

            self.assert_(isinstance(e.pw_passwd, basestring))

            self.assertEqual(e[2], e.pw_uid)

            self.assert_(isinstance(e.pw_uid, int))

            self.assertEqual(e[3], e.pw_gid)

            self.assert_(isinstance(e.pw_gid, int))

            self.assertEqual(e[4], e.pw_gecos)

            self.assert_(isinstance(e.pw_gecos, basestring))

            self.assertEqual(e[5], e.pw_dir)

            self.assert_(isinstance(e.pw_dir, basestring))

            self.assertEqual(e[6], e.pw_shell)

            self.assert_(isinstance(e.pw_shell, basestring))

            # The following won't work, because of duplicate entries

            # for one uid

            #    self.assertEqual(pwd.getpwuid(e.pw_uid), e)

            # instead of this collect all entries for one uid

            # and check afterwards

            entriesbyname.setdefault(e.pw_name, []).append(e)

            entriesbyuid.setdefault(e.pw_uid, []).append(e)

        if len(entries) > 1000:  # Huge passwd file (NIS?) -- skip the rest

            return

        # check whether the entry returned by getpwuid()

        # for each uid is among those from getpwall() for this uid

        for e in entries:

            if not e[0] or e[0] == '+':

                continue # skip NIS entries etc.

            self.assert_(pwd.getpwnam(e.pw_name) in entriesbyname[e.pw_name])

            self.assert_(pwd.getpwuid(e.pw_uid) in entriesbyuid[e.pw_uid])

    def test_errors(self):

        self.assertRaises(TypeError, pwd.getpwuid)

        self.assertRaises(TypeError, pwd.getpwnam)

        self.assertRaises(TypeError, pwd.getpwall, 42)

        # try to get some errors

        bynames = {}

        byuids = {}

        for (n, p, u, g, gecos, d, s) in pwd.getpwall():

            bynames[n] = u

            byuids[u] = n

        allnames = bynames.keys()

        namei = 0

        fakename = allnames[namei]

        while fakename in bynames:

            chars = list(fakename)

            for i in xrange(len(chars)):

                if chars[i] == 'z':

                    chars[i] = 'A'

                    break

                elif chars[i] == 'Z':

                    continue

                else:

                    chars[i] = chr(ord(chars[i]) + 1)

                    break

            else:

                namei = namei + 1

                try:

                    fakename = allnames[namei]

                except IndexError:

                    # should never happen... if so, just forget it

                    break

            fakename = ''.join(chars)

        self.assertRaises(KeyError, pwd.getpwnam, fakename)

        # Choose a non-existent uid.

        fakeuid = 4127

        while fakeuid in byuids:

            fakeuid = (fakeuid * 3) % 0x10000

        self.assertRaises(KeyError, pwd.getpwuid, fakeuid)

def test_main():

    test_support.run_unittest(PwdTest)

if __name__ == "__main__":

    test_main()