anchor.diff:  
       machine.screenshot("startup_done")
   
  -    with test_new_win("check sandbox"):
  -        machine.succeed(
  -            ru(
  -                "${xdo "type-url" ''
  -                  search --sync --onlyvisible --name "New Tab"
  -                  windowfocus --sync
  -                  type --delay 1000 "chrome://sandbox"
  -                ''}"
  -            )
  -        )
  -
  -        machine.succeed(
  -            ru(
  -                "${xdo "submit-url" ''
  -                  search --sync --onlyvisible --name "New Tab"
  -                  windowfocus --sync
  -                  key --delay 1000 Return
  -                ''}"
  -            )
  -        )
  -
  -        machine.screenshot("sandbox_info")
  -
  -        machine.succeed(
  -            ru(
  -                "${xdo "find-window" ''
  -                  search --sync --onlyvisible --name "Sandbox Status"
  -                  windowfocus --sync
  -                ''}"
  -            )
  -        )
  -        machine.succeed(
  -            ru(
  -                "${xdo "copy-sandbox-info" ''
  -                  key --delay 1000 Ctrl+a Ctrl+c
  -                ''}"
  -            )
  -        )
  -
  -        clipboard = machine.succeed(
  -            ru("${pkgs.xclip}/bin/xclip -o")
  -        )
  -
  +    with test_new_win("sandbox_info", "chrome://sandbox", "Sandbox Status") as clipboard:
           filters = [
               "layer 1 sandbox.*namespace",
               "pid namespaces.*yes",
  
positive.code:   machine.imports = [ ./common/user-account.nix ./common/x11.nix ];
    machine.virtualisation.memorySize = 2047;
    machine.test-support.displayManager.auto.user = user;
    machine.environment.systemPackages = [ chromiumPkg ];
  
    startupHTML = pkgs.writeText "chromium-startup.html" ''
      <!DOCTYPE html>
  
negative.code: 
  
      @contextmanager
      def test_new_win(description, url, window_name):
          create_new_win()
          machine.wait_for_window("New Tab")
          machine.send_chars(f"{url}\n")
          machine.wait_for_window(window_name)
          machine.screenshot(description)
          machine.succeed(
              ru(
                  "${xdo "copy-all" ''
                    key --delay 1000 Ctrl+a Ctrl+c
                  ''}"
              )
          )
          clipboard = machine.succeed(
              ru("${pkgs.xclip}/bin/xclip -o")
          )
          print(f"{description} window content:\n{clipboard}")
          with machine.nested(description):
              yield clipboard
          # Close the newly created window:
          machine.send_key("ctrl-w")
  
  