old_contents: #!/usr/bin/env python3
  #
  # Copyright (C) 2019-2020 VyOS maintainers and contributors
  #
  # This program is free software; you can redistribute it and/or modify
  # it under the terms of the GNU General Public License version 2 or later as
  # published by the Free Software Foundation.
  #
  # This program is distributed in the hope that it will be useful,
  # but WITHOUT ANY WARRANTY; without even the implied warranty of
  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  # GNU General Public License for more details.
  #
  # You should have received a copy of the GNU General Public License
  # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  
  import re
  import os
  import unittest
  
  from psutil import process_iter
  from vyos.configsession import ConfigSession, ConfigSessionError
  from vyos.util import read_file
  
  SSHD_CONF = '/etc/ssh/sshd_config'
  base_path = ['service', 'ssh']
  
  def get_config_value(key):
      tmp = read_file(SSHD_CONF)
      tmp = re.findall(r'\n?{}\s+(.*)'.format(key), tmp)
      return tmp[0]
  
  
  class TestServiceSSH(unittest.TestCase):
      def setUp(self):
          self.session = ConfigSession(os.getpid())
          # ensure we can also run this test on a live system - so lets clean
          # out the current configuration :)
          self.session.delete(base_path)
  
      def tearDown(self):
          del self.session
  
      def test_ssh(self):
          """ Check if SSH service can be configured and runs """
          self.session.set(base_path + ['port', '2222'])
          self.session.set(base_path + ['disable-host-validation'])
          self.session.set(base_path + ['disable-password-authentication'])
  
          # commit changes
          self.session.commit()
  
          # Check configured port
          port = get_config_value('Port')
          self.assertTrue("2222" in port)
  
          # Check DNS usage
          dns = get_config_value('UseDNS')
          self.assertTrue("no" in dns)
  
          # Check PasswordAuthentication
          pwd = get_config_value('PasswordAuthentication')
          self.assertTrue("no" in pwd)
  
          # Check for running process
          self.assertTrue("sshd" in (p.name() for p in process_iter()))
  
  if __name__ == '__main__':
      unittest.main()
  
new_contents: #!/usr/bin/env python3
  #
  # Copyright (C) 2019-2020 VyOS maintainers and contributors
  #
  # This program is free software; you can redistribute it and/or modify
  # it under the terms of the GNU General Public License version 2 or later as
  # published by the Free Software Foundation.
  #
  # This program is distributed in the hope that it will be useful,
  # but WITHOUT ANY WARRANTY; without even the implied warranty of
  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  # GNU General Public License for more details.
  #
  # You should have received a copy of the GNU General Public License
  # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  
  import re
  import os
  import unittest
  
  from psutil import process_iter
  from vyos.configsession import ConfigSession, ConfigSessionError
  from vyos.util import read_file
  
  SSHD_CONF = '/etc/ssh/sshd_config'
  base_path = ['service', 'ssh']
  
  def get_config_value(key):
      tmp = read_file(SSHD_CONF)
      tmp = re.findall(r'\n?{}\s+(.*)'.format(key), tmp)
      return tmp[0]
  
  
  class TestServiceSSH(unittest.TestCase):
      def setUp(self):
          self.session = ConfigSession(os.getpid())
          # ensure we can also run this test on a live system - so lets clean
          # out the current configuration :)
          self.session.delete(base_path)
  
      def tearDown(self):
          del self.session
  
      def test_ssh(self):
          """ Check if SSH service can be configured and runs """
          self.session.set(base_path + ['port', '2222'])
          self.session.set(base_path + ['disable-host-validation'])
          self.session.set(base_path + ['disable-password-authentication'])
          self.session.set(base_path + ['loglevel', 'VERBOSE'])
          self.session.set(base_path + ['listen-address', '127.0.0.1'])
          self.session.set(base_path + ['client-keepalive-interval', '100'])
  
          # commit changes
          self.session.commit()
  
          # Check configured port
          port = get_config_value('Port')
          self.assertTrue("2222" in port)
  
          # Check DNS usage
          dns = get_config_value('UseDNS')
          self.assertTrue("no" in dns)
  
          # Check PasswordAuthentication
          pwd = get_config_value('PasswordAuthentication')
          self.assertTrue("no" in pwd)
  
          # Check loglevel
          loglevel = get_config_value('LogLevel')
          self.assertTrue("VERBOSE" in loglevel)
  
          # Check listen address
          address = get_config_value('ListenAddress')
          self.assertTrue("127.0.0.1" in address)
  
          # Check keepalive
          keepalive = get_config_value('ClientAliveInterval')
          self.assertTrue("100" in keepalive)
  
          # Check for running process
          self.assertTrue("sshd" in (p.name() for p in process_iter()))
  
  if __name__ == '__main__':
      unittest.main()
  
subject: extend tests