# coding=utf-8

# Copyright 2014 International Business Machines Corporation
# All Rights Reserved.
#
#    Licensed under the Apache License, Version 2.0 (the "License"); you may
#    not use this file except in compliance with the License. You may obtain
#    a copy of the License at
#
#         http://www.apache.org/licenses/LICENSE-2.0
#
#    Unless required by applicable law or agreed to in writing, software
#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
#    License for the specific language governing permissions and limitations
#    under the License.

"""Test class for console_utils driver module."""

import errno
import fcntl
import ipaddress
import os
import random
import signal
import socket
import string
import subprocess
import tempfile
import time
from unittest import mock

from ironic_lib import utils as ironic_utils
from oslo_config import cfg
from oslo_service import loopingcall
import psutil

from ironic.common import exception
from ironic.drivers.modules import console_utils
from ironic.drivers.modules import ipmitool as ipmi
from ironic.tests.unit.db import base as db_base
from ironic.tests.unit.db import utils as db_utils
from ironic.tests.unit.objects import utils as obj_utils


CONF = cfg.CONF

INFO_DICT = db_utils.get_test_ipmi_info()


class ConsoleUtilsTestCase(db_base.DbTestCase):

    def setUp(self):
        super(ConsoleUtilsTestCase, self).setUp()
        self.node = obj_utils.get_test_node(
            self.context,
            driver_info=INFO_DICT)
        self.info = ipmi._parse_driver_info(self.node)

    def test__get_console_pid_dir(self):
        pid_dir = '/tmp/pid_dir'
        self.config(terminal_pid_dir=pid_dir, group='console')
        dir = console_utils._get_console_pid_dir()
        self.assertEqual(pid_dir, dir)

    def test__get_console_pid_dir_tempdir(self):
        self.config(tempdir='/tmp/fake_dir')
        dir = console_utils._get_console_pid_dir()
        self.assertEqual(CONF.tempdir, dir)

    @mock.patch.object(os, 'makedirs', autospec=True)
    @mock.patch.object(os.path, 'exists', autospec=True)
    def test__ensure_console_pid_dir_exists(self, mock_path_exists,
                                            mock_makedirs):
        mock_path_exists.return_value = True
        mock_makedirs.side_effect = OSError
        pid_dir = console_utils._get_console_pid_dir()

        console_utils._ensure_console_pid_dir_exists()

        mock_path_exists.assert_called_once_with(pid_dir)
        self.assertFalse(mock_makedirs.called)

    @mock.patch.object(os, 'makedirs', autospec=True)
    @mock.patch.object(os.path, 'exists', autospec=True)
    def test__ensure_console_pid_dir_exists_fail(self, mock_path_exists,
                                                 mock_makedirs):
        mock_path_exists.return_value = False
        mock_makedirs.side_effect = OSError
        pid_dir = console_utils._get_console_pid_dir()

        self.assertRaises(exception.ConsoleError,
                          console_utils._ensure_console_pid_dir_exists)

        mock_path_exists.assert_called_once_with(pid_dir)
        mock_makedirs.assert_called_once_with(pid_dir)

    @mock.patch.object(console_utils, '_get_console_pid_dir', autospec=True)
    def test__get_console_pid_file(self, mock_dir):
        mock_dir.return_value = tempfile.gettempdir()
        expected_path = '%(tempdir)s/%(uuid)s.pid' % {
            'tempdir': mock_dir.return_value,
            'uuid': self.info['uuid']}
        path = console_utils._get_console_pid_file(self.info['uuid'])
        self.assertEqual(expected_path, path)
        mock_dir.assert_called_once_with()

    @mock.patch.object(console_utils, 'open',
                       mock.mock_open(read_data='12345\n'))
    @mock.patch.object(console_utils, '_get_console_pid_file', autospec=True)
    def test__get_console_pid(self, mock_pid_file):
        tmp_file_handle = tempfile.NamedTemporaryFile()
        tmp_file = tmp_file_handle.name

        mock_pid_file.return_value = tmp_file

        pid = console_utils._get_console_pid(self.info['uuid'])

        mock_pid_file.assert_called_once_with(self.info['uuid'])
        self.assertEqual(pid, 12345)

    @mock.patch.object(console_utils, 'open',
                       mock.mock_open(read_data='Hello World\n'))
    @mock.patch.object(console_utils, '_get_console_pid_file', autospec=True)
    def test__get_console_pid_not_a_num(self, mock_pid_file):
        tmp_file_handle = tempfile.NamedTemporaryFile()
        tmp_file = tmp_file_handle.name

        mock_pid_file.return_value = tmp_file

        self.assertRaises(exception.NoConsolePid,
                          console_utils._get_console_pid,
                          self.info['uuid'])
        mock_pid_file.assert_called_once_with(self.info['uuid'])

    def test__get_console_pid_file_not_found(self):
        self.assertRaises(exception.NoConsolePid,
                          console_utils._get_console_pid,
                          self.info['uuid'])

    @mock.patch.object(ironic_utils, 'unlink_without_raise', autospec=True)
    @mock.patch.object(os, 'kill', autospec=True)
    @mock.patch.object(console_utils, '_get_console_pid', autospec=True)
    def test__stop_console(self, mock_pid, mock_kill, mock_unlink):
        pid_file = console_utils._get_console_pid_file(self.info['uuid'])
        mock_pid.return_value = 12345

        console_utils._stop_console(self.info['uuid'])

        mock_pid.assert_called_once_with(self.info['uuid'])

        # a check if process still exist (signal 0) in a loop
        mock_kill.assert_any_call(mock_pid.return_value, signal.SIG_DFL)
        # and that it receives the SIGTERM
        mock_kill.assert_any_call(mock_pid.return_value, signal.SIGTERM)
        mock_unlink.assert_called_once_with(pid_file)

    @mock.patch.object(ironic_utils, 'unlink_without_raise', autospec=True)
    @mock.patch.object(os, 'kill', autospec=True)
    @mock.patch.object(psutil, 'pid_exists', autospec=True, return_value=True)
    @mock.patch.object(console_utils, '_get_console_pid', autospec=True)
    def test__stop_console_forced_kill(self, mock_pid, mock_psutil, mock_kill,
                                       mock_unlink):
        pid_file = console_utils._get_console_pid_file(self.info['uuid'])
        mock_pid.return_value = 12345

        console_utils._stop_console(self.info['uuid'])

        mock_pid.assert_called_once_with(self.info['uuid'])

        # Make sure console process receives hard SIGKILL
        mock_kill.assert_any_call(mock_pid.return_value, signal.SIGKILL)
        mock_unlink.assert_called_once_with(pid_file)

    @mock.patch.object(ironic_utils, 'unlink_without_raise', autospec=True)
    @mock.patch.object(os, 'kill', autospec=True)
    @mock.patch.object(console_utils, '_get_console_pid', autospec=True)
    def test__stop_console_nopid(self, mock_pid, mock_kill, mock_unlink):
        pid_file = console_utils._get_console_pid_file(self.info['uuid'])
        mock_pid.side_effect = exception.NoConsolePid(pid_path="/tmp/blah")

        self.assertRaises(exception.NoConsolePid,
                          console_utils._stop_console,
                          self.info['uuid'])

        mock_pid.assert_called_once_with(self.info['uuid'])
        self.assertFalse(mock_kill.called)
        mock_unlink.assert_called_once_with(pid_file)

    @mock.patch.object(ironic_utils, 'unlink_without_raise', autospec=True)
    @mock.patch.object(os, 'kill', autospec=True)
    @mock.patch.object(console_utils, '_get_console_pid', autospec=True)
    def test__stop_console_shellinabox_not_running(self, mock_pid,
                                                   mock_kill, mock_unlink):
        pid_file = console_utils._get_console_pid_file(self.info['uuid'])
        mock_pid.return_value = 12345
        mock_kill.side_effect = OSError(errno.ESRCH, 'message')

        console_utils._stop_console(self.info['uuid'])

        mock_pid.assert_called_once_with(self.info['uuid'])
        mock_kill.assert_called_once_with(mock_pid.return_value,
                                          signal.SIGTERM)
        mock_unlink.assert_called_once_with(pid_file)

    @mock.patch.object(ironic_utils, 'unlink_without_raise', autospec=True)
    @mock.patch.object(os, 'kill', autospec=True)
    @mock.patch.object(console_utils, '_get_console_pid', autospec=True)
    def test__stop_console_exception(self, mock_pid, mock_kill, mock_unlink):
        pid_file = console_utils._get_console_pid_file(self.info['uuid'])
        mock_pid.return_value = 12345
        mock_kill.side_effect = OSError(2, 'message')

        self.assertRaises(exception.ConsoleError,
                          console_utils._stop_console,
                          self.info['uuid'])

        mock_pid.assert_called_once_with(self.info['uuid'])
        mock_kill.assert_called_once_with(mock_pid.return_value,
                                          signal.SIGTERM)
        mock_unlink.assert_called_once_with(pid_file)

    def _get_shellinabox_console(self, scheme):
        generated_url = (
            console_utils.get_shellinabox_console_url(self.info['port']))
        console_host = CONF.my_ip
        if ipaddress.ip_address(console_host).version == 6:
            console_host = '[%s]' % console_host
        http_url = "%s://%s:%s" % (scheme, console_host, self.info['port'])
        self.assertEqual(http_url, generated_url)

    def test_get_shellinabox_console_url(self):
        self._get_shellinabox_console('http')

    def test_get_shellinabox_console_https_url(self):
        # specify terminal_cert_dir in /etc/ironic/ironic.conf
        self.config(terminal_cert_dir='/tmp', group='console')
        # use https
        self._get_shellinabox_console('https')

    def test_make_persistent_password_file(self):
        filepath = '%(tempdir)s/%(node_uuid)s' % {
            'tempdir': tempfile.gettempdir(),
            'node_uuid': self.info['uuid']}
        password = ''.join([random.choice(string.ascii_letters)
                            for n in range(16)])
        console_utils.make_persistent_password_file(filepath, password)
        # make sure file exists
        self.assertTrue(os.path.exists(filepath))
        # make sure the content is correct
        with open(filepath) as file:
            content = file.read()
        self.assertEqual(password, content)
        # delete the file
        os.unlink(filepath)

    @mock.patch.object(os, 'chmod', autospec=True)
    def test_make_persistent_password_file_fail(self, mock_chmod):
        mock_chmod.side_effect = IOError()
        filepath = '%(tempdir)s/%(node_uuid)s' % {
            'tempdir': tempfile.gettempdir(),
            'node_uuid': self.info['uuid']}
        self.assertRaises(exception.PasswordFileFailedToCreate,
                          console_utils.make_persistent_password_file,
                          filepath,
                          'password')

    @mock.patch.object(fcntl, 'fcntl', autospec=True)
    @mock.patch.object(console_utils, 'open',
                       mock.mock_open(read_data='12345\n'))
    @mock.patch.object(os.path, 'exists', autospec=True)
    @mock.patch.object(subprocess, 'Popen')
    @mock.patch.object(psutil, 'pid_exists', autospec=True)
    @mock.patch.object(console_utils, '_ensure_console_pid_dir_exists',
                       autospec=True)
    @mock.patch.object(console_utils, '_stop_console', autospec=True)
    def test_start_shellinabox_console(self, mock_stop,
                                       mock_dir_exists,
                                       mock_pid_exists,
                                       mock_popen,
                                       mock_path_exists, mock_fcntl):
        mock_popen.return_value.poll.return_value = 0
        mock_popen.return_value.stdout.return_value.fileno.return_value = 0
        mock_popen.return_value.stderr.return_value.fileno.return_value = 1
        mock_pid_exists.return_value = True
        mock_path_exists.return_value = True

        console_utils.start_shellinabox_console(self.info['uuid'],
                                                self.info['port'],
                                                'ls&')

        mock_stop.assert_called_once_with(self.info['uuid'])
        mock_dir_exists.assert_called_once_with()
        mock_pid_exists.assert_called_once_with(12345)
        mock_popen.assert_called_once_with(mock.ANY,
                                           stdout=subprocess.PIPE,
                                           stderr=subprocess.PIPE)
        mock_popen.return_value.poll.assert_called_once_with()

    @mock.patch.object(fcntl, 'fcntl', autospec=True)
    @mock.patch.object(console_utils, 'open',
                       mock.mock_open(read_data='12345\n'))
    @mock.patch.object(os.path, 'exists', autospec=True)
    @mock.patch.object(subprocess, 'Popen')
    @mock.patch.object(psutil, 'pid_exists', autospec=True)
    @mock.patch.object(console_utils, '_ensure_console_pid_dir_exists',
                       autospec=True)
    @mock.patch.object(console_utils, '_stop_console', autospec=True)
    def test_start_shellinabox_console_nopid(self, mock_stop,
                                             mock_dir_exists,
                                             mock_pid_exists,
                                             mock_popen,
                                             mock_path_exists, mock_fcntl):
        # no existing PID file before starting
        mock_stop.side_effect = exception.NoConsolePid('/tmp/blah')
        mock_popen.return_value.poll.return_value = 0
        mock_popen.return_value.stdout.return_value.fileno.return_value = 0
        mock_popen.return_value.stderr.return_value.fileno.return_value = 1
        mock_pid_exists.return_value = True
        mock_path_exists.return_value = True

        console_utils.start_shellinabox_console(self.info['uuid'],
                                                self.info['port'],
                                                'ls&')

        mock_stop.assert_called_once_with(self.info['uuid'])
        mock_dir_exists.assert_called_once_with()
        mock_pid_exists.assert_called_once_with(12345)
        mock_popen.assert_called_once_with(mock.ANY,
                                           stdout=subprocess.PIPE,
                                           stderr=subprocess.PIPE)
        mock_popen.return_value.poll.assert_called_once_with()

    @mock.patch.object(time, 'sleep', autospec=True)
    @mock.patch.object(os, 'read', autospec=True)
    @mock.patch.object(fcntl, 'fcntl', autospec=True)
    @mock.patch.object(subprocess, 'Popen')
    @mock.patch.object(console_utils, '_ensure_console_pid_dir_exists',
                       autospec=True)
    @mock.patch.object(console_utils, '_stop_console', autospec=True)
    def test_start_shellinabox_console_fail(
            self, mock_stop, mock_dir_exists, mock_popen, mock_fcntl,
            mock_os_read, mock_sleep):
        mock_popen.return_value.poll.return_value = 1
        stdout = mock_popen.return_value.stdout
        stderr = mock_popen.return_value.stderr
        stdout.return_value.fileno.return_value = 0
        stderr.return_value.fileno.return_value = 1
        err_output = b'error output'
        mock_os_read.side_effect = [err_output] * 2 + [OSError] * 2
        mock_fcntl.side_effect = [1, mock.Mock()] * 2

        self.assertRaisesRegex(
            exception.ConsoleSubprocessFailed, "Stdout: %r" % err_output,
            console_utils.start_shellinabox_console, self.info['uuid'],
            self.info['port'], 'ls&')

        mock_stop.assert_called_once_with(self.info['uuid'])
        mock_sleep.assert_has_calls([mock.call(1), mock.call(1)])
        mock_dir_exists.assert_called_once_with()
        for obj in (stdout, stderr):
            mock_fcntl.assert_has_calls([
                mock.call(obj, fcntl.F_GETFL),
                mock.call(obj, fcntl.F_SETFL, 1 | os.O_NONBLOCK)])
        mock_popen.assert_called_once_with(mock.ANY,
                                           stdout=subprocess.PIPE,
                                           stderr=subprocess.PIPE)
        mock_popen.return_value.poll.assert_called_with()

    @mock.patch.object(fcntl, 'fcntl', autospec=True)
    @mock.patch.object(subprocess, 'Popen')
    @mock.patch.object(console_utils, '_ensure_console_pid_dir_exists',
                       autospec=True)
    @mock.patch.object(console_utils, '_stop_console', autospec=True)
    def test_start_shellinabox_console_timeout(
            self, mock_stop, mock_dir_exists, mock_popen, mock_fcntl):
        self.config(subprocess_timeout=0, group='console')
        self.config(subprocess_checking_interval=0, group='console')
        mock_popen.return_value.poll.return_value = None
        mock_popen.return_value.stdout.return_value.fileno.return_value = 0
        mock_popen.return_value.stderr.return_value.fileno.return_value = 1

        self.assertRaisesRegex(
            exception.ConsoleSubprocessFailed, 'Timeout or error',
            console_utils.start_shellinabox_console, self.info['uuid'],
            self.info['port'], 'ls&')

        mock_stop.assert_called_once_with(self.info['uuid'])
        mock_dir_exists.assert_called_once_with()
        mock_popen.assert_called_once_with(mock.ANY,
                                           stdout=subprocess.PIPE,
                                           stderr=subprocess.PIPE)
        mock_popen.return_value.poll.assert_called_with()
        self.assertEqual(0, mock_popen.return_value.communicate.call_count)

    @mock.patch.object(time, 'sleep', autospec=True)
    @mock.patch.object(os, 'read', autospec=True)
    @mock.patch.object(fcntl, 'fcntl', autospec=True)
    @mock.patch.object(console_utils, 'open',
                       mock.mock_open(read_data='12345\n'))
    @mock.patch.object(os.path, 'exists', autospec=True)
    @mock.patch.object(subprocess, 'Popen')
    @mock.patch.object(psutil, 'pid_exists', autospec=True)
    @mock.patch.object(console_utils, '_ensure_console_pid_dir_exists',
                       autospec=True)
    @mock.patch.object(console_utils, '_stop_console', autospec=True)
    def test_start_shellinabox_console_fail_no_pid(
            self, mock_stop, mock_dir_exists, mock_pid_exists, mock_popen,
            mock_path_exists, mock_fcntl, mock_os_read, mock_sleep):
        mock_popen.return_value.poll.return_value = 0
        stdout = mock_popen.return_value.stdout
        stderr = mock_popen.return_value.stderr
        stdout.return_value.fileno.return_value = 0
        stderr.return_value.fileno.return_value = 1
        mock_pid_exists.return_value = False
        mock_os_read.side_effect = [b'error output'] * 2 + [OSError] * 2
        mock_fcntl.side_effect = [1, mock.Mock()] * 2
        mock_path_exists.return_value = True

        self.assertRaises(exception.ConsoleSubprocessFailed,
                          console_utils.start_shellinabox_console,
                          self.info['uuid'],
                          self.info['port'],
                          'ls&')

        mock_stop.assert_called_once_with(self.info['uuid'])
        mock_sleep.assert_has_calls([mock.call(1), mock.call(1)])
        mock_dir_exists.assert_called_once_with()
        for obj in (stdout, stderr):
            mock_fcntl.assert_has_calls([
                mock.call(obj, fcntl.F_GETFL),
                mock.call(obj, fcntl.F_SETFL, 1 | os.O_NONBLOCK)])
        mock_pid_exists.assert_called_with(12345)
        mock_popen.assert_called_once_with(mock.ANY,
                                           stdout=subprocess.PIPE,
                                           stderr=subprocess.PIPE)
        mock_popen.return_value.poll.assert_called_with()

    @mock.patch.object(subprocess, 'Popen', autospec=True)
    @mock.patch.object(console_utils, '_ensure_console_pid_dir_exists',
                       autospec=True)
    @mock.patch.object(console_utils, '_stop_console', autospec=True)
    def test_start_shellinabox_console_fail_nopiddir(self, mock_stop,
                                                     mock_dir_exists,
                                                     mock_popen):
        mock_dir_exists.side_effect = exception.ConsoleError(message='fail')
        mock_popen.return_value.poll.return_value = 0

        self.assertRaises(exception.ConsoleError,
                          console_utils.start_shellinabox_console,
                          self.info['uuid'],
                          self.info['port'],
                          'ls&')

        mock_stop.assert_called_once_with(self.info['uuid'])
        mock_dir_exists.assert_called_once_with()
        self.assertFalse(mock_popen.called)

    @mock.patch.object(console_utils, '_stop_console', autospec=True)
    def test_stop_shellinabox_console(self, mock_stop):

        console_utils.stop_shellinabox_console(self.info['uuid'])

        mock_stop.assert_called_once_with(self.info['uuid'])

    @mock.patch.object(console_utils, '_stop_console', autospec=True)
    def test_stop_shellinabox_console_fail_nopid(self, mock_stop):
        mock_stop.side_effect = exception.NoConsolePid('/tmp/blah')

        console_utils.stop_shellinabox_console(self.info['uuid'])

        mock_stop.assert_called_once_with(self.info['uuid'])

    def test_get_socat_console_url_tcp(self):
        self.config(my_ip="10.0.0.1")
        url = console_utils.get_socat_console_url(self.info['port'])
        self.assertEqual("tcp://10.0.0.1:%s" % self.info['port'], url)

    def test_get_socat_console_url_tcp6(self):
        self.config(my_ip='::1')
        url = console_utils.get_socat_console_url(self.info['port'])
        self.assertEqual("tcp://[::1]:%s" % self.info['port'], url)

    def test_get_socat_console_url_tcp_with_address_conf(self):
        self.config(socat_address="10.0.0.1", group='console')
        url = console_utils.get_socat_console_url(self.info['port'])
        self.assertEqual("tcp://10.0.0.1:%s" % self.info['port'], url)

    @mock.patch.object(subprocess, 'Popen', autospec=True)
    @mock.patch.object(console_utils, '_get_console_pid_file', autospec=True)
    @mock.patch.object(console_utils, '_ensure_console_pid_dir_exists',
                       autospec=True)
    @mock.patch.object(console_utils, '_stop_console', autospec=True)
    @mock.patch.object(loopingcall.FixedIntervalLoopingCall, 'start',
                       autospec=True)
    def _test_start_socat_console_check_arg(self, mock_timer_start,
                                            mock_stop, mock_dir_exists,
                                            mock_get_pid, mock_popen):
        mock_timer_start.return_value = mock.Mock()
        mock_get_pid.return_value = '/tmp/%s.pid' % self.info['uuid']

        console_utils.start_socat_console(self.info['uuid'],
                                          self.info['port'],
                                          'ls&')

        mock_stop.assert_called_once_with(self.info['uuid'])
        mock_dir_exists.assert_called_once_with()
        mock_get_pid.assert_called_once_with(self.info['uuid'])
        mock_timer_start.assert_called_once_with(mock.ANY, interval=mock.ANY)
        mock_popen.assert_called_once_with(mock.ANY, stderr=subprocess.PIPE)
        return mock_popen.call_args[0][0]

    def test_start_socat_console_check_arg_default_timeout(self):
        args = self._test_start_socat_console_check_arg()
        self.assertIn('-T600', args)

    def test_start_socat_console_check_arg_timeout(self):
        self.config(terminal_timeout=1, group='console')
        args = self._test_start_socat_console_check_arg()
        self.assertIn('-T1', args)

    def test_start_socat_console_check_arg_timeout_disabled(self):
        self.config(terminal_timeout=0, group='console')
        args = self._test_start_socat_console_check_arg()
        self.assertNotIn('-T0', args)

    def test_start_socat_console_check_arg_bind_addr_default_ipv4(self):
        self.config(my_ip='10.0.0.1')
        args = self._test_start_socat_console_check_arg()
        self.assertIn('TCP4-LISTEN:%s,bind=10.0.0.1,reuseaddr,fork,'
                      'max-children=1' %
                      self.info['port'], args)

    def test_start_socat_console_check_arg_bind_addr_ipv4(self):
        self.config(socat_address='10.0.0.1', group='console')
        args = self._test_start_socat_console_check_arg()
        self.assertIn('TCP4-LISTEN:%s,bind=10.0.0.1,reuseaddr,fork,'
                      'max-children=1' %
                      self.info['port'], args)

    @mock.patch.object(os.path, 'exists', autospec=True)
    @mock.patch.object(subprocess, 'Popen', autospec=True)
    @mock.patch.object(psutil, 'pid_exists', autospec=True)
    @mock.patch.object(console_utils, '_get_console_pid', autospec=True)
    @mock.patch.object(console_utils, '_ensure_console_pid_dir_exists',
                       autospec=True)
    @mock.patch.object(console_utils, '_stop_console', autospec=True)
    def test_start_socat_console(self, mock_stop,
                                 mock_dir_exists,
                                 mock_get_pid,
                                 mock_pid_exists,
                                 mock_popen,
                                 mock_path_exists):
        mock_popen.return_value.pid = 23456
        mock_popen.return_value.poll.return_value = None
        mock_popen.return_value.communicate.return_value = (None, None)

        mock_get_pid.return_value = 23456
        mock_path_exists.return_value = True

        console_utils.start_socat_console(self.info['uuid'],
                                          self.info['port'],
                                          'ls&')

        mock_stop.assert_called_once_with(self.info['uuid'])
        mock_dir_exists.assert_called_once_with()
        mock_get_pid.assert_called_with(self.info['uuid'])
        mock_path_exists.assert_called_with(mock.ANY)
        mock_popen.assert_called_once_with(mock.ANY, stderr=subprocess.PIPE)

    @mock.patch.object(os.path, 'exists', autospec=True)
    @mock.patch.object(subprocess, 'Popen', autospec=True)
    @mock.patch.object(psutil, 'pid_exists', autospec=True)
    @mock.patch.object(console_utils, '_get_console_pid', autospec=True)
    @mock.patch.object(console_utils, '_ensure_console_pid_dir_exists',
                       autospec=True)
    @mock.patch.object(console_utils, '_stop_console', autospec=True)
    def test_start_socat_console_nopid(self, mock_stop,
                                       mock_dir_exists,
                                       mock_get_pid,
                                       mock_pid_exists,
                                       mock_popen,
                                       mock_path_exists):
        # no existing PID file before starting
        mock_stop.side_effect = exception.NoConsolePid('/tmp/blah')
        mock_popen.return_value.pid = 23456
        mock_popen.return_value.poll.return_value = None
        mock_popen.return_value.communicate.return_value = (None, None)

        mock_get_pid.return_value = 23456
        mock_path_exists.return_value = True

        console_utils.start_socat_console(self.info['uuid'],
                                          self.info['port'],
                                          'ls&')

        mock_stop.assert_called_once_with(self.info['uuid'])
        mock_dir_exists.assert_called_once_with()
        mock_get_pid.assert_called_with(self.info['uuid'])
        mock_path_exists.assert_called_with(mock.ANY)
        mock_popen.assert_called_once_with(mock.ANY, stderr=subprocess.PIPE)

    @mock.patch.object(subprocess, 'Popen', autospec=True)
    @mock.patch.object(console_utils, '_ensure_console_pid_dir_exists',
                       autospec=True)
    @mock.patch.object(console_utils, '_stop_console', autospec=True)
    def test_start_socat_console_fail(self, mock_stop, mock_dir_exists,
                                      mock_popen):
        mock_popen.side_effect = OSError()
        mock_popen.return_value.pid = 23456
        mock_popen.return_value.poll.return_value = 1
        mock_popen.return_value.communicate.return_value = (None, 'error')

        self.assertRaises(exception.ConsoleSubprocessFailed,
                          console_utils.start_socat_console,
                          self.info['uuid'],
                          self.info['port'],
                          'ls&')

        mock_stop.assert_called_once_with(self.info['uuid'])
        mock_dir_exists.assert_called_once_with()
        mock_popen.assert_called_once_with(mock.ANY, stderr=subprocess.PIPE)

    @mock.patch.object(subprocess, 'Popen', autospec=True)
    @mock.patch.object(console_utils, '_ensure_console_pid_dir_exists',
                       autospec=True)
    @mock.patch.object(console_utils, '_stop_console', autospec=True)
    def test_start_socat_console_fail_nopiddir(self, mock_stop,
                                               mock_dir_exists,
                                               mock_popen):
        mock_dir_exists.side_effect = exception.ConsoleError(message='fail')

        self.assertRaises(exception.ConsoleError,
                          console_utils.start_socat_console,
                          self.info['uuid'],
                          self.info['port'],
                          'ls&')

        mock_stop.assert_called_once_with(self.info['uuid'])
        mock_dir_exists.assert_called_once_with()
        self.assertEqual(0, mock_popen.call_count)

    @mock.patch.object(console_utils, '_stop_console', autospec=True)
    def test_stop_socat_console(self, mock_stop):
        console_utils.stop_socat_console(self.info['uuid'])
        mock_stop.assert_called_once_with(self.info['uuid'])

    @mock.patch.object(console_utils.LOG, 'warning', autospec=True)
    @mock.patch.object(console_utils, '_stop_console', autospec=True)
    def test_stop_socat_console_fail_nopid(self, mock_stop, mock_log_warning):
        mock_stop.side_effect = exception.NoConsolePid('/tmp/blah')
        console_utils.stop_socat_console(self.info['uuid'])
        mock_stop.assert_called_once_with(self.info['uuid'])
        # LOG.warning() is called when _stop_console() raises NoConsolePid
        self.assertTrue(mock_log_warning.called)

    def test_valid_console_port_range(self):
        self.config(port_range='10000:20000', group='console')
        start, stop = console_utils._get_port_range()
        self.assertEqual((start, stop), (10000, 20000))

    def test_invalid_console_port_range(self):
        self.config(port_range='20000:10000', group='console')
        self.assertRaises(exception.InvalidParameterValue,
                          console_utils._get_port_range)

    @mock.patch.object(console_utils, 'ALLOCATED_PORTS', autospec=True)
    @mock.patch.object(console_utils, '_verify_port', autospec=True)
    def test_allocate_port_success(self, mock_verify, mock_ports):
        self.config(port_range='10000:10001', group='console')
        port = console_utils.acquire_port()
        mock_verify.assert_called_once_with(10000, host=None)
        self.assertEqual(port, 10000)
        mock_ports.add.assert_called_once_with(10000)

    @mock.patch.object(console_utils, 'ALLOCATED_PORTS', autospec=True)
    @mock.patch.object(console_utils, '_verify_port', autospec=True)
    def test_allocate_port_range_retry(self, mock_verify, mock_ports):
        self.config(port_range='10000:10003', group='console')
        mock_verify.side_effect = (exception.Conflict, exception.Conflict,
                                   None)
        port = console_utils.acquire_port()
        verify_calls = [mock.call(10000, host=None),
                        mock.call(10001, host=None),
                        mock.call(10002, host=None)]
        mock_verify.assert_has_calls(verify_calls)
        self.assertEqual(port, 10002)
        mock_ports.add.assert_called_once_with(10002)

    @mock.patch.object(console_utils, 'ALLOCATED_PORTS', autospec=True)
    @mock.patch.object(console_utils, '_verify_port', autospec=True)
    def test_allocate_port_no_free_ports(self, mock_verify, mock_ports):
        self.config(port_range='10000:10005', group='console')
        mock_verify.side_effect = exception.Conflict
        self.assertRaises(exception.NoFreeIPMITerminalPorts,
                          console_utils.acquire_port)
        verify_calls = [mock.call(p, host=None) for p in range(10000, 10005)]
        mock_verify.assert_has_calls(verify_calls)

    @mock.patch.object(socket, 'socket', autospec=True)
    def test__verify_port_default(self, mock_socket):
        self.config(host='localhost.localdomain')
        mock_sock = mock.MagicMock()
        mock_socket.return_value = mock_sock
        console_utils._verify_port(10000)
        mock_sock.bind.assert_called_once_with(('localhost.localdomain',
                                                10000))

    @mock.patch.object(socket, 'socket', autospec=True)
    def test__verify_port_hostname(self, mock_socket):
        mock_sock = mock.MagicMock()
        mock_socket.return_value = mock_sock
        console_utils._verify_port(10000, host='localhost.localdomain')
        mock_socket.assert_called_once_with()
        mock_sock.bind.assert_called_once_with(('localhost.localdomain',
                                                10000))

    @mock.patch.object(socket, 'socket', autospec=True)
    def test__verify_port_ipv4(self, mock_socket):
        mock_sock = mock.MagicMock()
        mock_socket.return_value = mock_sock
        console_utils._verify_port(10000, host='1.2.3.4')
        mock_socket.assert_called_once_with()
        mock_sock.bind.assert_called_once_with(('1.2.3.4', 10000))

    @mock.patch.object(socket, 'socket', autospec=True)
    def test__verify_port_ipv6(self, mock_socket):
        mock_sock = mock.MagicMock()
        mock_socket.return_value = mock_sock
        console_utils._verify_port(10000, host='2001:dead:beef::1')
        mock_socket.assert_called_once_with(socket.AF_INET6)
        mock_sock.bind.assert_called_once_with(('2001:dead:beef::1', 10000))
