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✏️ test_grp.py

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"""Test script for the grp module."""

import unittest
from test import test_support

grp = test_support.import_module('grp')

class GroupDatabaseTestCase(unittest.TestCase):

def check_value(self, value):
        # check that a grp tuple has the entries and
        # attributes promised by the docs
        self.assertEqual(len(value), 4)
        self.assertEqual(value[0], value.gr_name)
        self.assertIsInstance(value.gr_name, basestring)
        self.assertEqual(value[1], value.gr_passwd)
        self.assertIsInstance(value.gr_passwd, basestring)
        self.assertEqual(value[2], value.gr_gid)
        self.assertIsInstance(value.gr_gid, (long, int))
        self.assertEqual(value[3], value.gr_mem)
        self.assertIsInstance(value.gr_mem, list)

def test_values(self):
        entries = grp.getgrall()

for e in entries:
            self.check_value(e)

def test_values_extended(self):
        entries = grp.getgrall()
        if len(entries) > 1000:  # Huge group file (NIS?) -- skip the rest
            self.skipTest('huge group file, extended test skipped')

for e in entries:
            e2 = grp.getgrgid(e.gr_gid)
            self.check_value(e2)
            self.assertEqual(e2.gr_gid, e.gr_gid)
            name = e.gr_name
            if name.startswith('+') or name.startswith('-'):
                # NIS-related entry
                continue
            e2 = grp.getgrnam(name)
            self.check_value(e2)
            # There are instances where getgrall() returns group names in
            # lowercase while getgrgid() returns proper casing.
            # Discovered on Ubuntu 5.04 (custom).
            self.assertEqual(e2.gr_name.lower(), name.lower())

def test_errors(self):
        self.assertRaises(TypeError, grp.getgrgid)
        self.assertRaises(TypeError, grp.getgrnam)
        self.assertRaises(TypeError, grp.getgrall, 42)

# try to get some errors
        bynames = {}
        bygids = {}
        for (n, p, g, mem) in grp.getgrall():
            if not n or n == '+':
                continue # skip NIS entries etc.
            bynames[n] = g
            bygids[g] = 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, grp.getgrnam, fakename)

# Choose a non-existent gid.
        fakegid = 4127
        while fakegid in bygids:
            fakegid = (fakegid * 3) % 0x10000

self.assertRaises(KeyError, grp.getgrgid, fakegid)

def test_main():
    test_support.run_unittest(GroupDatabaseTestCase)

if __name__ == "__main__":
    test_main()

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✏️ test_grp.py