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#!/usr/bin/python3
import grp
import imaplib
import os
import os.path
import poplib
import pwd
import random
import string
import subprocess
import sys
import unittest
from passlib.hash import des_crypt
def random_string(length):
'''Return a random string, consisting of ASCII letters, with given
length.'''
s = ''
maxind = len(string.ascii_letters)-1
for _ in range(length):
s += string.ascii_letters[random.randint(0, maxind)]
return s.lower()
def login_exists(login):
'''Checks whether the given login exists on the system.'''
try:
pwd.getpwnam(login)
return True
except KeyError:
return False
def get_distribution():
'''Return the name of the Linux Distribution we are running.'''
cmd = ['lsb_release', '-si']
output = subprocess.check_output(cmd)
return output.strip()
class TestUser:
'''Create a temporary test user and remove it again on close.'''
def __init__(self):
'''Create a new user account with a random password.'''
self.login = None
while True:
login = random_string(8)
if not login_exists(login):
break
self.salt = random_string(2)
self.password = random_string(8)
self.crypted = des_crypt.using(salt=self.salt).hash(self.password)
subprocess.check_call(['useradd', '-p', self.crypted, '-m', login])
self.login = login
p = pwd.getpwnam(self.login)
self.uid = p[2]
self.gid = p[3]
def __del__(self):
'''Remove the created user account.'''
if self.login:
self.close()
def close(self):
'''Remove the created user account.'''
subprocess.check_call(['userdel', '-f', '-r', self.login])
self.login = None
class DovecotBasics(unittest.TestCase):
'''Base operational tests for Dovecot server.'''
def setUp(self):
'''Create test scenario.
We want to test the default setup, but pre-setup an mbox on a tmp user
'''
self.distribution = get_distribution()
self.user = TestUser()
# create fresh test mailbox with one new and one old mail
self.mailbox = '/var/mail/' + self.user.login
self.orig_mbox = '''From test1@test1.com Fri Nov 17 02:21:08 2006
Date: Thu, 16 Nov 2006 17:12:23 -0800
From: Test User 1 <test1@test1.com>
To: Dovecot tester <dovecot@test.com>
Subject: Test 1
Status: N
Some really important news.
From test2@test1.com Tue Nov 28 11:29:34 2006
Date: Tue, 28 Nov 2006 11:29:34 +0100
From: Test User 2 <test2@test2.com>
To: Dovecot tester <dovecot@test.com>
Subject: Test 2
Status: R
More news.
Get cracking!
'''
with open(self.mailbox, 'w') as f:
f.write(self.orig_mbox)
os.chown(self.mailbox, self.user.uid, grp.getgrnam('mail')[2])
os.chmod(self.mailbox, 0o660)
def tearDown(self):
self.user.close()
def _test_pop3_proto(self, pop):
'''Internal factorization of POP3 protocol checks with an established
connection.'''
# check empty password
self.assertEqual(pop.user(self.user.login), b'+OK')
self.assertRaises(poplib.error_proto, pop.pass_, '')
# check wrong password
self.assertEqual(pop.user(self.user.login), b'+OK')
self.assertRaises(poplib.error_proto, pop.pass_, '123')
# check correct password
self.assertEqual(pop.user(self.user.login), b'+OK')
self.assertEqual(pop.pass_(self.user.password), b'+OK Logged in.')
# check messages
self.assertEqual(pop.stat()[0], 2, b'2 available messages')
self.assertEqual(pop.list()[1], [b'1 163', b'2 161'])
self.assertEqual('\n'.join(l.decode() for l in pop.retr(1)[1]), '''Date: Thu, 16 Nov 2006 17:12:23 -0800
From: Test User 1 <test1@test1.com>
To: Dovecot tester <dovecot@test.com>
Subject: Test 1
Some really important news.''')
self.assertEqual('\n'.join(l.decode() for l in pop.retr(2)[1]), '''Date: Tue, 28 Nov 2006 11:29:34 +0100
From: Test User 2 <test2@test2.com>
To: Dovecot tester <dovecot@test.com>
Subject: Test 2
More news.
Get cracking!''')
self.assertEqual(pop.quit(), b'+OK Logging out.')
def test_pop3(self):
'''Test POP3 protocol.'''
pop = poplib.POP3('localhost')
self.assertEqual(pop.getwelcome(),
b'+OK Dovecot (%s) ready.' % self.distribution)
self._test_pop3_proto(pop)
def test_pop3s(self):
'''Test POP3S protocol.'''
pop = poplib.POP3_SSL('localhost')
self.assertEqual(pop.getwelcome(),
b'+OK Dovecot (%s) ready.' % self.distribution)
self._test_pop3_proto(pop)
def _test_imap_proto(self, imap):
'''Internal factorization of IMAP4 protocol checks with an established
connection.'''
# invalid passwords
self.assertRaises(imaplib.IMAP4.error, imap.login,
self.user.login, '')
self.assertRaises(imaplib.IMAP4.error, imap.login,
self.user.login, '123')
# correct password
imap.login(self.user.login, self.user.password)
# list mailboxes
status, imlist = imap.list()
self.assertEqual(status, 'OK')
self.assertTrue(imlist[0].decode().endswith('INBOX'))
# check mails
imap.select()
self.assertEqual(imap.search(None, 'ALL'), ('OK', [b'1 2']))
self.assertEqual(imap.fetch('1', '(FLAGS)'),
('OK', [b'1 (FLAGS (\\Recent))']))
self.assertEqual(imap.fetch('2', '(FLAGS)'),
('OK', [b'2 (FLAGS (\\Seen \\Recent))']))
self.assertEqual(imap.fetch('1', '(BODY[TEXT])')[1][0][1],
b'Some really important news.\r\n')
self.assertEqual(imap.fetch('2', '(BODY[TEXT])')[1][0][1],
b'More news.\r\n\r\nGet cracking!')
self.assertEqual(imap.fetch('1', '(RFC822)')[1],
[(b'1 (RFC822 {163}',
b'''Date: Thu, 16 Nov 2006 17:12:23 -0800\r
From: Test User 1 <test1@test1.com>\r
To: Dovecot tester <dovecot@test.com>\r
Subject: Test 1\r
\r
Some really important news.\r
'''), b')'])
# delete mail 1
self.assertEqual(imap.store('1', '+FLAGS', '\\Deleted')[0], 'OK')
self.assertEqual(imap.expunge()[0], 'OK')
self.assertEqual(imap.search(None, 'ALL'), ('OK', [b'1']))
# old mail 2 is mail 1 now
self.assertEqual(imap.fetch('1', '(RFC822)')[1],
[(b'1 (RFC822 {161}',
b'''Date: Tue, 28 Nov 2006 11:29:34 +0100\r
From: Test User 2 <test2@test2.com>\r
To: Dovecot tester <dovecot@test.com>\r
Subject: Test 2\r
\r
More news.\r
\r
Get cracking!'''), b')'])
imap.close()
imap.logout()
def test_imap(self):
'''Test IMAP4 protocol.'''
imap = imaplib.IMAP4('localhost')
self._test_imap_proto(imap)
def test_imaps(self):
'''Test IMAP4S protocol.'''
imap = imaplib.IMAP4_SSL('localhost')
self._test_imap_proto(imap)
if __name__ == '__main__':
os.dup2(1, 2)
suite = unittest.TestSuite()
suite.addTest(unittest.TestLoader().loadTestsFromTestCase(DovecotBasics))
result = unittest.TextTestRunner(verbosity=2).run(suite)
sys.exit(not result.wasSuccessful())
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