Qt.git - Qt s a cross-platform application framework that is used for developing application software that can be run on various software and hardware platforms with little or no change in the underlying codebase, while still being a native application with native capabilities and speed.

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from test import support
# If we end up with a significant number of tests that don't require
# threading, this test module should be split.  Right now we skip
# them all if we don't have threading.
threading = support.import_module('threading')

from contextlib import contextmanager
import errno
import imaplib
import os.path
import socketserver
import time
import calendar
import inspect

from test.support import (reap_threads, verbose, transient_internet,
                          run_with_tz, run_with_locale, cpython_only)
import unittest
from unittest import mock
from datetime import datetime, timezone, timedelta
try:
    import ssl
except ImportError:
    ssl = None

CERTFILE = os.path.join(os.path.dirname(__file__) or os.curdir, "keycert3.pem")
CAFILE = os.path.join(os.path.dirname(__file__) or os.curdir, "pycacert.pem")


class TestImaplib(unittest.TestCase):

    def test_Internaldate2tuple(self):
        t0 = calendar.timegm((2000, 1, 1, 0, 0, 0, -1, -1, -1))
        tt = imaplib.Internaldate2tuple(
            b'25 (INTERNALDATE "01-Jan-2000 00:00:00 +0000")')
        self.assertEqual(time.mktime(tt), t0)
        tt = imaplib.Internaldate2tuple(
            b'25 (INTERNALDATE "01-Jan-2000 11:30:00 +1130")')
        self.assertEqual(time.mktime(tt), t0)
        tt = imaplib.Internaldate2tuple(
            b'25 (INTERNALDATE "31-Dec-1999 12:30:00 -1130")')
        self.assertEqual(time.mktime(tt), t0)

    @run_with_tz('MST+07MDT,M4.1.0,M10.5.0')
    def test_Internaldate2tuple_issue10941(self):
        self.assertNotEqual(imaplib.Internaldate2tuple(
            b'25 (INTERNALDATE "02-Apr-2000 02:30:00 +0000")'),
            imaplib.Internaldate2tuple(
                b'25 (INTERNALDATE "02-Apr-2000 03:30:00 +0000")'))

    def timevalues(self):
        return [2000000000, 2000000000.0, time.localtime(2000000000),
                (2033, 5, 18, 5, 33, 20, -1, -1, -1),
                (2033, 5, 18, 5, 33, 20, -1, -1, 1),
                datetime.fromtimestamp(2000000000,
                                       timezone(timedelta(0, 2 * 60 * 60))),
                '"18-May-2033 05:33:20 +0200"']

    @run_with_locale('LC_ALL', 'de_DE', 'fr_FR')
    # DST rules included to work around quirk where the Gnu C library may not
    # otherwise restore the previous time zone
    @run_with_tz('STD-1DST,M3.2.0,M11.1.0')
    def test_Time2Internaldate(self):
        expected = '"18-May-2033 05:33:20 +0200"'

        for t in self.timevalues():
            internal = imaplib.Time2Internaldate(t)
            self.assertEqual(internal, expected)

    def test_that_Time2Internaldate_returns_a_result(self):
        # Without tzset, we can check only that it successfully
        # produces a result, not the correctness of the result itself,
        # since the result depends on the timezone the machine is in.
        for t in self.timevalues():
            imaplib.Time2Internaldate(t)

    def test_imap4_host_default_value(self):
        expected_errnos = [
            # This is the exception that should be raised.
            errno.ECONNREFUSED,
        ]
        if hasattr(errno, 'EADDRNOTAVAIL'):
            # socket.create_connection() fails randomly with
            # EADDRNOTAVAIL on Travis CI.
            expected_errnos.append(errno.EADDRNOTAVAIL)
        with self.assertRaises(OSError) as cm:
            imaplib.IMAP4()
        self.assertIn(cm.exception.errno, expected_errnos)


if ssl:
    class SecureTCPServer(socketserver.TCPServer):

        def get_request(self):
            newsocket, fromaddr = self.socket.accept()
            context = ssl.SSLContext()
            context.load_cert_chain(CERTFILE)
            connstream = context.wrap_socket(newsocket, server_side=True)
            return connstream, fromaddr

    IMAP4_SSL = imaplib.IMAP4_SSL

else:

    class SecureTCPServer:
        pass

    IMAP4_SSL = None


class SimpleIMAPHandler(socketserver.StreamRequestHandler):
    timeout = 1
    continuation = None
    capabilities = ''

    def setup(self):
        super().setup()
        self.server.logged = None

    def _send(self, message):
        if verbose:
            print("SENT: %r" % message.strip())
        self.wfile.write(message)

    def _send_line(self, message):
        self._send(message + b'\r\n')

    def _send_textline(self, message):
        self._send_line(message.encode('ASCII'))

    def _send_tagged(self, tag, code, message):
        self._send_textline(' '.join((tag, code, message)))

    def handle(self):
        # Send a welcome message.
        self._send_textline('* OK IMAP4rev1')
        while 1:
            # Gather up input until we receive a line terminator or we timeout.
            # Accumulate read(1) because it's simpler to handle the differences
            # between naked sockets and SSL sockets.
            line = b''
            while 1:
                try:
                    part = self.rfile.read(1)
                    if part == b'':
                        # Naked sockets return empty strings..
                        return
                    line += part
                except OSError:
                    # ..but SSLSockets raise exceptions.
                    return
                if line.endswith(b'\r\n'):
                    break

            if verbose:
                print('GOT: %r' % line.strip())
            if self.continuation:
                try:
                    self.continuation.send(line)
                except StopIteration:
                    self.continuation = None
                continue
            splitline = line.decode('ASCII').split()
            tag = splitline[0]
            cmd = splitline[1]
            args = splitline[2:]

            if hasattr(self, 'cmd_' + cmd):
                continuation = getattr(self, 'cmd_' + cmd)(tag, args)
                if continuation:
                    self.continuation = continuation
                    next(continuation)
            else:
                self._send_tagged(tag, 'BAD', cmd + ' unknown')

    def cmd_CAPABILITY(self, tag, args):
        caps = ('IMAP4rev1 ' + self.capabilities
                if self.capabilities
                else 'IMAP4rev1')
        self._send_textline('* CAPABILITY ' + caps)
        self._send_tagged(tag, 'OK', 'CAPABILITY completed')

    def cmd_LOGOUT(self, tag, args):
        self.server.logged = None
        self._send_textline('* BYE IMAP4ref1 Server logging out')
        self._send_tagged(tag, 'OK', 'LOGOUT completed')

    def cmd_LOGIN(self, tag, args):
        self.server.logged = args[0]
        self._send_tagged(tag, 'OK', 'LOGIN completed')


class NewIMAPTestsMixin():
    client = None

    def _setup(self, imap_handler, connect=True):
        """
        Sets up imap_handler for tests. imap_handler should inherit from either:
        - SimpleIMAPHandler - for testing IMAP commands,
        - socketserver.StreamRequestHandler - if raw access to stream is needed.
        Returns (client, server).
        """
        class TestTCPServer(self.server_class):
            def handle_error(self, request, client_address):
                """
                End request and raise the error if one occurs.
                """
                self.close_request(request)
                self.server_close()
                raise

        self.addCleanup(self._cleanup)
        self.server = self.server_class((support.HOST, 0), imap_handler)
        self.thread = threading.Thread(
            name=self._testMethodName+'-server',
            target=self.server.serve_forever,
            # Short poll interval to make the test finish quickly.
            # Time between requests is short enough that we won't wake
            # up spuriously too many times.
            kwargs={'poll_interval': 0.01})
        self.thread.daemon = True  # In case this function raises.
        self.thread.start()

        if connect:
            self.client = self.imap_class(*self.server.server_address)

        return self.client, self.server

    def _cleanup(self):
        """
        Cleans up the test server. This method should not be called manually,
        it is added to the cleanup queue in the _setup method already.
        """
        # if logout was called already we'd raise an exception trying to
        # shutdown the client once again
        if self.client is not None and self.client.state != 'LOGOUT':
            self.client.shutdown()
        # cleanup the server
        self.server.shutdown()
        self.server.server_close()
        self.thread.join(3.0)

    def test_EOF_without_complete_welcome_message(self):
        # http://bugs.python.org/issue5949
        class EOFHandler(socketserver.StreamRequestHandler):
            def handle(self):
                self.wfile.write(b'* OK')
        _, server = self._setup(EOFHandler, connect=False)
        self.assertRaises(imaplib.IMAP4.abort, self.imap_class,
                          *server.server_address)

    def test_line_termination(self):
        class BadNewlineHandler(SimpleIMAPHandler):
            def cmd_CAPABILITY(self, tag, args):
                self._send(b'* CAPABILITY IMAP4rev1 AUTH\n')
                self._send_tagged(tag, 'OK', 'CAPABILITY completed')
        _, server = self._setup(BadNewlineHandler, connect=False)
        self.assertRaises(imaplib.IMAP4.abort, self.imap_class,
                          *server.server_address)

    def test_enable_raises_error_if_not_AUTH(self):
        class EnableHandler(SimpleIMAPHandler):
            capabilities = 'AUTH ENABLE UTF8=ACCEPT'
        client, _ = self._setup(EnableHandler)
        self.assertFalse(client.utf8_enabled)
        with self.assertRaisesRegex(imaplib.IMAP4.error, 'ENABLE.*NONAUTH'):
            client.enable('foo')
        self.assertFalse(client.utf8_enabled)

    def test_enable_raises_error_if_no_capability(self):
        client, _ = self._setup(SimpleIMAPHandler)
        with self.assertRaisesRegex(imaplib.IMAP4.error,
                'does not support ENABLE'):
            client.enable('foo')

    def test_enable_UTF8_raises_error_if_not_supported(self):
        client, _ = self._setup(SimpleIMAPHandler)
        typ, data = client.login('user', 'pass')
        self.assertEqual(typ, 'OK')
        with self.assertRaisesRegex(imaplib.IMAP4.error,
                'does not support ENABLE'):
            client.enable('UTF8=ACCEPT')

    def test_enable_UTF8_True_append(self):
        class UTF8AppendServer(SimpleIMAPHandler):
            capabilities = 'ENABLE UTF8=ACCEPT'
            def cmd_ENABLE(self, tag, args):
                self._send_tagged(tag, 'OK', 'ENABLE successful')
            def cmd_AUTHENTICATE(self, tag, args):
                self._send_textline('+')
                self.server.response = yield
                self._send_tagged(tag, 'OK', 'FAKEAUTH successful')
            def cmd_APPEND(self, tag, args):
                self._send_textline('+')
                self.server.response = yield
                self._send_tagged(tag, 'OK', 'okay')
        client, server = self._setup(UTF8AppendServer)
        self.assertEqual(client._encoding, 'ascii')
        code, _ = client.authenticate('MYAUTH', lambda x: b'fake')
        self.assertEqual(code, 'OK')
        self.assertEqual(server.response, b'ZmFrZQ==\r\n')  # b64 encoded 'fake'
        code, _ = client.enable('UTF8=ACCEPT')
        self.assertEqual(code, 'OK')
        self.assertEqual(client._encoding, 'utf-8')
        msg_string = 'Subject: üñí©öðé'
        typ, data = client.append(None, None, None, msg_string.encode('utf-8'))
        self.assertEqual(typ, 'OK')
        self.assertEqual(server.response,
            ('UTF8 (%s)\r\n' % msg_string).encode('utf-8'))

    def test_search_disallows_charset_in_utf8_mode(self):
        class UTF8Server(SimpleIMAPHandler):
            capabilities = 'AUTH ENABLE UTF8=ACCEPT'
            def cmd_ENABLE(self, tag, args):
                self._send_tagged(tag, 'OK', 'ENABLE successful')
            def cmd_AUTHENTICATE(self, tag, args):
                self._send_textline('+')
                self.server.response = yield
                self._send_tagged(tag, 'OK', 'FAKEAUTH successful')
        client, _ = self._setup(UTF8Server)
        typ, _ = client.authenticate('MYAUTH', lambda x: b'fake')
        self.assertEqual(typ, 'OK')
        typ, _ = client.enable('UTF8=ACCEPT')
        self.assertEqual(typ, 'OK')
        self.assertTrue(client.utf8_enabled)
        with self.assertRaisesRegex(imaplib.IMAP4.error, 'charset.*UTF8'):
            client.search('foo', 'bar')

    def test_bad_auth_name(self):
        class MyServer(SimpleIMAPHandler):
            def cmd_AUTHENTICATE(self, tag, args):
                self._send_tagged(tag, 'NO',
                    'unrecognized authentication type {}'.format(args[0]))
        client, _ = self._setup(MyServer)
        with self.assertRaisesRegex(imaplib.IMAP4.error,
                'unrecognized authentication type METHOD'):
            client.authenticate('METHOD', lambda: 1)

    def test_invalid_authentication(self):
        class MyServer(SimpleIMAPHandler):
            def cmd_AUTHENTICATE(self, tag, args):
                self._send_textline('+')
                self.response = yield
                self._send_tagged(tag, 'NO', '[AUTHENTICATIONFAILED] invalid')
        client, _ = self._setup(MyServer)
        with self.assertRaisesRegex(imaplib.IMAP4.error,
                r'\[AUTHENTICATIONFAILED\] invalid'):
            client.authenticate('MYAUTH', lambda x: b'fake')

    def test_valid_authentication_bytes(self):
        class MyServer(SimpleIMAPHandler):
            def cmd_AUTHENTICATE(self, tag, args):
                self._send_textline('+')
                self.server.response = yield
                self._send_tagged(tag, 'OK', 'FAKEAUTH successful')
        client, server = self._setup(MyServer)
        code, _ = client.authenticate('MYAUTH', lambda x: b'fake')
        self.assertEqual(code, 'OK')
        self.assertEqual(server.response, b'ZmFrZQ==\r\n')  # b64 encoded 'fake'

    def test_valid_authentication_plain_text(self):
        class MyServer(SimpleIMAPHandler):
            def cmd_AUTHENTICATE(self, tag, args):
                self._send_textline('+')
                self.server.response = yield
                self._send_tagged(tag, 'OK', 'FAKEAUTH successful')
        client, server = self._setup(MyServer)
        code, _ = client.authenticate('MYAUTH', lambda x: 'fake')
        self.assertEqual(code, 'OK')
        self.assertEqual(server.response, b'ZmFrZQ==\r\n')  # b64 encoded 'fake'

    def test_login_cram_md5_bytes(self):
        class AuthHandler(SimpleIMAPHandler):
            capabilities = 'LOGINDISABLED AUTH=CRAM-MD5'
            def cmd_AUTHENTICATE(self, tag, args):
                self._send_textline('+ PDE4OTYuNjk3MTcwOTUyQHBvc3RvZmZpY2Uucm'
                                    'VzdG9uLm1jaS5uZXQ=')
                r = yield
                if (r == b'dGltIGYxY2E2YmU0NjRiOWVmYT'
                         b'FjY2E2ZmZkNmNmMmQ5ZjMy\r\n'):
                    self._send_tagged(tag, 'OK', 'CRAM-MD5 successful')
                else:
                    self._send_tagged(tag, 'NO', 'No access')
        client, _ = self._setup(AuthHandler)
        self.assertTrue('AUTH=CRAM-MD5' in client.capabilities)
        ret, _ = client.login_cram_md5("tim", b"tanstaaftanstaaf")
        self.assertEqual(ret, "OK")

    def test_login_cram_md5_plain_text(self):
        class AuthHandler(SimpleIMAPHandler):
            capabilities = 'LOGINDISABLED AUTH=CRAM-MD5'
            def cmd_AUTHENTICATE(self, tag, args):
                self._send_textline('+ PDE4OTYuNjk3MTcwOTUyQHBvc3RvZmZpY2Uucm'
                                    'VzdG9uLm1jaS5uZXQ=')
                r = yield
                if (r == b'dGltIGYxY2E2YmU0NjRiOWVmYT'
                         b'FjY2E2ZmZkNmNmMmQ5ZjMy\r\n'):
                    self._send_tagged(tag, 'OK', 'CRAM-MD5 successful')
                else:
                    self._send_tagged(tag, 'NO', 'No access')
        client, _ = self._setup(AuthHandler)
        self.assertTrue('AUTH=CRAM-MD5' in client.capabilities)
        ret, _ = client.login_cram_md5("tim", "tanstaaftanstaaf")
        self.assertEqual(ret, "OK")

    def test_aborted_authentication(self):
        class MyServer(SimpleIMAPHandler):
            def cmd_AUTHENTICATE(self, tag, args):
                self._send_textline('+')
                self.response = yield
                if self.response == b'*\r\n':
                    self._send_tagged(
                        tag,
                        'NO',
                        '[AUTHENTICATIONFAILED] aborted')
                else:
                    self._send_tagged(tag, 'OK', 'MYAUTH successful')
        client, _ = self._setup(MyServer)
        with self.assertRaisesRegex(imaplib.IMAP4.error,
                r'\[AUTHENTICATIONFAILED\] aborted'):
            client.authenticate('MYAUTH', lambda x: None)

    @mock.patch('imaplib._MAXLINE', 10)
    def test_linetoolong(self):
        class TooLongHandler(SimpleIMAPHandler):
            def handle(self):
                # send response line longer than the limit set in the next line
                self.wfile.write(b'* OK ' + 11 * b'x' + b'\r\n')
        _, server = self._setup(TooLongHandler, connect=False)
        with self.assertRaisesRegex(imaplib.IMAP4.error,
                'got more than 10 bytes'):
            self.imap_class(*server.server_address)

    def test_simple_with_statement(self):
        _, server = self._setup(SimpleIMAPHandler, connect=False)
        with self.imap_class(*server.server_address):
            pass

    def test_with_statement(self):
        _, server = self._setup(SimpleIMAPHandler, connect=False)
        with self.imap_class(*server.server_address) as imap:
            imap.login('user', 'pass')
            self.assertEqual(server.logged, 'user')
        self.assertIsNone(server.logged)

    def test_with_statement_logout(self):
        # It is legal to log out explicitly inside the with block
        _, server = self._setup(SimpleIMAPHandler, connect=False)
        with self.imap_class(*server.server_address) as imap:
            imap.login('user', 'pass')
            self.assertEqual(server.logged, 'user')
            imap.logout()
            self.assertIsNone(server.logged)
        self.assertIsNone(server.logged)

    # command tests

    def test_login(self):
        client, _ = self._setup(SimpleIMAPHandler)
        typ, data = client.login('user', 'pass')
        self.assertEqual(typ, 'OK')
        self.assertEqual(data[0], b'LOGIN completed')
        self.assertEqual(client.state, 'AUTH')

    def test_logout(self):
        client, _ = self._setup(SimpleIMAPHandler)
        typ, data = client.login('user', 'pass')
        self.assertEqual(typ, 'OK')
        self.assertEqual(data[0], b'LOGIN completed')
        typ, data = client.logout()
        self.assertEqual(typ, 'BYE')
        self.assertEqual(data[0], b'IMAP4ref1 Server logging out')
        self.assertEqual(client.state, 'LOGOUT')

    def test_lsub(self):
        class LsubCmd(SimpleIMAPHandler):
            def cmd_LSUB(self, tag, args):
                self._send_textline('* LSUB () "." directoryA')
                return self._send_tagged(tag, 'OK', 'LSUB completed')
        client, _ = self._setup(LsubCmd)
        client.login('user', 'pass')
        typ, data = client.lsub()
        self.assertEqual(typ, 'OK')
        self.assertEqual(data[0], b'() "." directoryA')


class NewIMAPTests(NewIMAPTestsMixin, unittest.TestCase):
    imap_class = imaplib.IMAP4
    server_class = socketserver.TCPServer


@unittest.skipUnless(ssl, "SSL not available")
class NewIMAPSSLTests(NewIMAPTestsMixin, unittest.TestCase):
    imap_class = IMAP4_SSL
    server_class = SecureTCPServer

    def test_ssl_raises(self):
        ssl_context = ssl.SSLContext(ssl.PROTOCOL_SSLv23)
        ssl_context.verify_mode = ssl.CERT_REQUIRED
        ssl_context.check_hostname = True
        ssl_context.load_verify_locations(CAFILE)

        with self.assertRaisesRegex(ssl.CertificateError,
                "hostname '127.0.0.1' doesn't match 'localhost'"):
            _, server = self._setup(SimpleIMAPHandler)
            client = self.imap_class(*server.server_address,
                                     ssl_context=ssl_context)
            client.shutdown()

    def test_ssl_verified(self):
        ssl_context = ssl.SSLContext(ssl.PROTOCOL_SSLv23)
        ssl_context.verify_mode = ssl.CERT_REQUIRED
        ssl_context.check_hostname = True
        ssl_context.load_verify_locations(CAFILE)

        _, server = self._setup(SimpleIMAPHandler)
        client = self.imap_class("localhost", server.server_address[1],
                                 ssl_context=ssl_context)
        client.shutdown()

    # Mock the private method _connect(), so mark the test as specific
    # to CPython stdlib
    @cpython_only
    def test_certfile_arg_warn(self):
        with support.check_warnings(('', DeprecationWarning)):
            with mock.patch.object(self.imap_class, 'open'):
                with mock.patch.object(self.imap_class, '_connect'):
                    self.imap_class('localhost', 143, certfile=CERTFILE)

class ThreadedNetworkedTests(unittest.TestCase):
    server_class = socketserver.TCPServer
    imap_class = imaplib.IMAP4

    def make_server(self, addr, hdlr):

        class MyServer(self.server_class):
            def handle_error(self, request, client_address):
                self.close_request(request)
                self.server_close()
                raise

        if verbose:
            print("creating server")
        server = MyServer(addr, hdlr)
        self.assertEqual(server.server_address, server.socket.getsockname())

        if verbose:
            print("server created")
            print("ADDR =", addr)
            print("CLASS =", self.server_class)
            print("HDLR =", server.RequestHandlerClass)

        t = threading.Thread(
            name='%s serving' % self.server_class,
            target=server.serve_forever,
            # Short poll interval to make the test finish quickly.
            # Time between requests is short enough that we won't wake
            # up spuriously too many times.
            kwargs={'poll_interval': 0.01})
        t.daemon = True  # In case this function raises.
        t.start()
        if verbose:
            print("server running")
        return server, t

    def reap_server(self, server, thread):
        if verbose:
            print("waiting for server")
        server.shutdown()
        server.server_close()
        thread.join()
        if verbose:
            print("done")

    @contextmanager
    def reaped_server(self, hdlr):
        server, thread = self.make_server((support.HOST, 0), hdlr)
        try:
            yield server
        finally:
            self.reap_server(server, thread)

    @contextmanager
    def reaped_pair(self, hdlr):
        with self.reaped_server(hdlr) as server:
            client = self.imap_class(*server.server_address)
            try:
                yield server, client
            finally:
                client.logout()

    @reap_threads
    def test_connect(self):
        with self.reaped_server(SimpleIMAPHandler) as server:
            client = self.imap_class(*server.server_address)
            client.shutdown()

    @reap_threads
    def test_bracket_flags(self):

        # This violates RFC 3501, which disallows ']' characters in tag names,
        # but imaplib has allowed producing such tags forever, other programs
        # also produce them (eg: OtherInbox's Organizer app as of 20140716),
        # and Gmail, for example, accepts them and produces them.  So we
        # support them.  See issue #21815.

        class BracketFlagHandler(SimpleIMAPHandler):

            def handle(self):
                self.flags = ['Answered', 'Flagged', 'Deleted', 'Seen', 'Draft']
                super().handle()

            def cmd_AUTHENTICATE(self, tag, args):
                self._send_textline('+')
                self.server.response = yield
                self._send_tagged(tag, 'OK', 'FAKEAUTH successful')

            def cmd_SELECT(self, tag, args):
                flag_msg = ' \\'.join(self.flags)
                self._send_line(('* FLAGS (%s)' % flag_msg).encode('ascii'))
                self._send_line(b'* 2 EXISTS')
                self._send_line(b'* 0 RECENT')
                msg = ('* OK [PERMANENTFLAGS %s \\*)] Flags permitted.'
                        % flag_msg)
                self._send_line(msg.encode('ascii'))
                self._send_tagged(tag, 'OK', '[READ-WRITE] SELECT completed.')

            def cmd_STORE(self, tag, args):
                new_flags = args[2].strip('(').strip(')').split()
                self.flags.extend(new_flags)
                flags_msg = '(FLAGS (%s))' % ' \\'.join(self.flags)
                msg = '* %s FETCH %s' % (args[0], flags_msg)
                self._send_line(msg.encode('ascii'))
                self._send_tagged(tag, 'OK', 'STORE completed.')

        with self.reaped_pair(BracketFlagHandler) as (server, client):
            code, data = client.authenticate('MYAUTH', lambda x: b'fake')
            self.assertEqual(code, 'OK')
            self.assertEqual(server.response, b'ZmFrZQ==\r\n')
            client.select('test')
            typ, [data] = client.store(b'1', "+FLAGS", "[test]")
            self.assertIn(b'[test]', data)
            client.select('test')
            typ, [data] = client.response('PERMANENTFLAGS')
            self.assertIn(b'[test]', data)

    @reap_threads
    def test_issue5949(self):

        class EOFHandler(socketserver.StreamRequestHandler):
            def handle(self):
                # EOF without sending a complete welcome message.
                self.wfile.write(b'* OK')

        with self.reaped_server(EOFHandler) as server:
            self.assertRaises(imaplib.IMAP4.abort,
                              self.imap_class, *server.server_address)

    @reap_threads
    def test_line_termination(self):

        class BadNewlineHandler(SimpleIMAPHandler):

            def cmd_CAPABILITY(self, tag, args):
                self._send(b'* CAPABILITY IMAP4rev1 AUTH\n')
                self._send_tagged(tag, 'OK', 'CAPABILITY completed')

        with self.reaped_server(BadNewlineHandler) as server:
            self.assertRaises(imaplib.IMAP4.abort,
                              self.imap_class, *server.server_address)

    class UTF8Server(SimpleIMAPHandler):
        capabilities = 'AUTH ENABLE UTF8=ACCEPT'

        def cmd_ENABLE(self, tag, args):
            self._send_tagged(tag, 'OK', 'ENABLE successful')

        def cmd_AUTHENTICATE(self, tag, args):
            self._send_textline('+')
            self.server.response = yield
            self._send_tagged(tag, 'OK', 'FAKEAUTH successful')

    @reap_threads
    def test_enable_raises_error_if_not_AUTH(self):
        with self.reaped_pair(self.UTF8Server) as (server, client):
            self.assertFalse(client.utf8_enabled)
            self.assertRaises(imaplib.IMAP4.error, client.enable, 'foo')
            self.assertFalse(client.utf8_enabled)

    # XXX Also need a test that enable after SELECT raises an error.

    @reap_threads
    def test_enable_raises_error_if_no_capability(self):
        class NoEnableServer(self.UTF8Server):
            capabilities = 'AUTH'
        with self.reaped_pair(NoEnableServer) as (server, client):
            self.assertRaises(imaplib.IMAP4.error, client.enable, 'foo')

    @reap_threads
    def test_enable_UTF8_raises_error_if_not_supported(self):
        class NonUTF8Server(SimpleIMAPHandler):
            pass
        with self.assertRaises(imaplib.IMAP4.error):
            with self.reaped_pair(NonUTF8Server) as (server, client):
                typ, data = client.login('user', 'pass')
                self.assertEqual(typ, 'OK')
                client.enable('UTF8=ACCEPT')
                pass

    @reap_threads
    def test_enable_UTF8_True_append(self):

        class UTF8AppendServer(self.UTF8Server):
            def cmd_APPEND(self, tag, args):
                self._send_textline('+')
                self.server.response = yield
                self._send_tagged(tag, 'OK', 'okay')

        with self.reaped_pair(UTF8AppendServer) as (server, client):
            self.assertEqual(client._encoding, 'ascii')
            code, _ = client.authenticate('MYAUTH', lambda x: b'fake')
            self.assertEqual(code, 'OK')
            self.assertEqual(server.response,
                             b'ZmFrZQ==\r\n')  # b64 encoded 'fake'
            code, _ = client.enable('UTF8=ACCEPT')
            self.assertEqual(code, 'OK')
            self.assertEqual(client._encoding, 'utf-8')
            msg_string = 'Subject: üñí©öðé'
            typ, data = client.append(
                None, None, None, msg_string.encode('utf-8'))
            self.assertEqual(typ, 'OK')
            self.assertEqual(
                server.response,
                ('UTF8 (%s)\r\n' % msg_string).encode('utf-8')
            )

    # XXX also need a test that makes sure that the Literal and Untagged_status
    # regexes uses unicode in UTF8 mode instead of the default ASCII.

    @reap_threads
    def test_search_disallows_charset_in_utf8_mode(self):
        with self.reaped_pair(self.UTF8Server) as (server, client):
            typ, _ = client.authenticate('MYAUTH', lambda x: b'fake')
            self.assertEqual(typ, 'OK')
            typ, _ = client.enable('UTF8=ACCEPT')
            self.assertEqual(typ, 'OK')
            self.assertTrue(client.utf8_enabled)
            self.assertRaises(imaplib.IMAP4.error, client.search, 'foo', 'bar')

    @reap_threads
    def test_bad_auth_name(self):

        class MyServer(SimpleIMAPHandler):

            def cmd_AUTHENTICATE(self, tag, args):
                self._send_tagged(tag, 'NO', 'unrecognized authentication '
                                  'type {}'.format(args[0]))

        with self.reaped_pair(MyServer) as (server, client):
            with self.assertRaises(imaplib.IMAP4.error):
                client.authenticate('METHOD', lambda: 1)

    @reap_threads
    def test_invalid_authentication(self):

        class MyServer(SimpleIMAPHandler):

            def cmd_AUTHENTICATE(self, tag, args):
                self._send_textline('+')
                self.response = yield
                self._send_tagged(tag, 'NO', '[AUTHENTICATIONFAILED] invalid')

        with self.reaped_pair(MyServer) as (server, client):
            with self.assertRaises(imaplib.IMAP4.error):
                code, data = client.authenticate('MYAUTH', lambda x: b'fake')

    @reap_threads
    def test_valid_authentication(self):

        class MyServer(SimpleIMAPHandler):

            def cmd_AUTHENTICATE(self, tag, args):
                self._send_textline('+')
                self.server.response = yield
                self._send_tagged(tag, 'OK', 'FAKEAUTH successful')

        with self.reaped_pair(MyServer) as (server, client):
            code, data = client.authenticate('MYAUTH', lambda x: b'fake')
            self.assertEqual(code, 'OK')
            self.assertEqual(server.response,
                             b'ZmFrZQ==\r\n')  # b64 encoded 'fake'

        with self.reaped_pair(MyServer) as (server, client):
            code, data = client.authenticate('MYAUTH', lambda x: 'fake')
            self.assertEqual(code, 'OK')
            self.assertEqual(server.response,
                             b'ZmFrZQ==\r\n')  # b64 encoded 'fake'

    @reap_threads
    def test_login_cram_md5(self):

        class AuthHandler(SimpleIMAPHandler):

            capabilities = 'LOGINDISABLED AUTH=CRAM-MD5'

            def cmd_AUTHENTICATE(self, tag, args):
                self._send_textline('+ PDE4OTYuNjk3MTcwOTUyQHBvc3RvZmZpY2Uucm'
                                    'VzdG9uLm1jaS5uZXQ=')
                r = yield
                if (r == b'dGltIGYxY2E2YmU0NjRiOWVmYT'
                         b'FjY2E2ZmZkNmNmMmQ5ZjMy\r\n'):
                    self._send_tagged(tag, 'OK', 'CRAM-MD5 successful')
                else:
                    self._send_tagged(tag, 'NO', 'No access')

        with self.reaped_pair(AuthHandler) as (server, client):
            self.assertTrue('AUTH=CRAM-MD5' in client.capabilities)
            ret, data = client.login_cram_md5("tim", "tanstaaftanstaaf")
            self.assertEqual(ret, "OK")

        with self.reaped_pair(AuthHandler) as (server, client):
            self.assertTrue('AUTH=CRAM-MD5' in client.capabilities)
            ret, data = client.login_cram_md5("tim", b"tanstaaftanstaaf")
            self.assertEqual(ret, "OK")


    @reap_threads
    def test_aborted_authentication(self):

        class MyServer(SimpleIMAPHandler):

            def cmd_AUTHENTICATE(self, tag, args):
                self._send_textline('+')
                self.response = yield

                if self.response == b'*\r\n':
                    self._send_tagged(tag, 'NO', '[AUTHENTICATIONFAILED] aborted')
                else:
                    self._send_tagged(tag, 'OK', 'MYAUTH successful')

        with self.reaped_pair(MyServer) as (server, client):
            with self.assertRaises(imaplib.IMAP4.error):
                code, data = client.authenticate('MYAUTH', lambda x: None)


    def test_linetoolong(self):
        class TooLongHandler(SimpleIMAPHandler):
            def handle(self):
                # Send a very long response line
                self.wfile.write(b'* OK ' + imaplib._MAXLINE * b'x' + b'\r\n')

        with self.reaped_server(TooLongHandler) as server:
            self.assertRaises(imaplib.IMAP4.error,
                              self.imap_class, *server.server_address)

    @reap_threads
    def test_simple_with_statement(self):
        # simplest call
        with self.reaped_server(SimpleIMAPHandler) as server:
            with self.imap_class(*server.server_address):
                pass

    @reap_threads
    def test_with_statement(self):
        with self.reaped_server(SimpleIMAPHandler) as server:
            with self.imap_class(*server.server_address) as imap:
                imap.login('user', 'pass')
                self.assertEqual(server.logged, 'user')
            self.assertIsNone(server.logged)

    @reap_threads
    def test_with_statement_logout(self):
        # what happens if already logout in the block?
        with self.reaped_server(SimpleIMAPHandler) as server:
            with self.imap_class(*server.server_address) as imap:
                imap.login('user', 'pass')
                self.assertEqual(server.logged, 'user')
                imap.logout()
                self.assertIsNone(server.logged)
            self.assertIsNone(server.logged)


@unittest.skipUnless(ssl, "SSL not available")
class ThreadedNetworkedTestsSSL(ThreadedNetworkedTests):
    server_class = SecureTCPServer
    imap_class = IMAP4_SSL

    @reap_threads
    def test_ssl_verified(self):
        ssl_context = ssl.SSLContext(ssl.PROTOCOL_SSLv23)
        ssl_context.verify_mode = ssl.CERT_REQUIRED
        ssl_context.check_hostname = True
        ssl_context.load_verify_locations(CAFILE)

        with self.assertRaisesRegex(
                ssl.CertificateError,
                "hostname '127.0.0.1' doesn't match 'localhost'"):
            with self.reaped_server(SimpleIMAPHandler) as server:
                client = self.imap_class(*server.server_address,
                                         ssl_context=ssl_context)
                client.shutdown()

        with self.reaped_server(SimpleIMAPHandler) as server:
            client = self.imap_class("localhost", server.server_address[1],
                                     ssl_context=ssl_context)
            client.shutdown()


@unittest.skipUnless(
    support.is_resource_enabled('network'), 'network resource disabled')


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