anchor.diff:      with subtest("Check that no errors were logged"):
           assert "ERROR" not in output_log
   
  -    # example line: 2020-06-20 10:01:32 DEBUG (MainThread) [homeassistant.components.mqtt] Received message on home-assistant/test: b'let_there_be_light'
  -    with subtest("Check we received the mosquitto message"):
  -        assert "let_there_be_light" in output_log
  -
       with subtest("Check systemd unit hardening"):
           hass.log(hass.succeed("systemctl cat home-assistant.service"))
           hass.log(hass.succeed("systemd-analyze security home-assistant.service"))
  
positive.code:           listen_port = 80;
          };
  
          # show mqtt interaction in the log
          # https://www.home-assistant.io/integrations/logger/
          logger = {
            default = "info";
            logs."homeassistant.components.mqtt" = "debug";
          };
        };
  
  
negative.code:         # https://www.home-assistant.io/integrations/frontend/
          frontend = {};
  
          # set up a wake-on-lan switch to test capset capability required
          # for the ping suid wrapper
          # https://www.home-assistant.io/integrations/wake_on_lan/
  