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"""Test script for the grp module."""
import unittest
from test import support
grp = 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, str)
self.assertEqual(value[1], value.gr_passwd)
self.assertIsInstance(value.gr_passwd, str)
self.assertEqual(value[2], value.gr_gid)
self.assertIsInstance(value.gr_gid, 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 = list(bynames.keys())
namei = 0
fakename = allnames[namei]
while fakename in bynames:
chars = list(fakename)
for i in range(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)
if __name__ == "__main__":
unittest.main()
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