nixos/tests/pantheon: Restore greeter test

  meta.maintainers = lib.teams.pantheon.members;

  nodes.machine =

    { nodes, ... }:

    { ... }:

    let

      videosAutostart = pkgs.writeTextFile {

      services.xserver.enable = true;

      services.desktopManager.pantheon.enable = true;

      services.displayManager = {

        autoLogin.enable = true;

        autoLogin.user = nodes.machine.users.users.alice.name;

      };

      # We ship pantheon.appcenter by default when this is enabled.

      services.flatpak.enable = true;

      # We don't ship gnome-text-editor in Pantheon module, we add this line mainly

      # to catch eval issues related to this option.

      environment.pantheon.excludePackages = [ pkgs.gnome-text-editor ];

      programs.ydotool.enable = true;

    };

  enableOCR = true;

    ''

      machine.wait_for_unit("display-manager.service")

      with subtest("Test we can see usernames in elementary-greeter"):

          machine.wait_for_text("${user.description}")

          machine.wait_until_succeeds("pgrep -f io.elementary.greeter-compositor")

          # Ensure the password box is focused by clicking it.

          # Workaround for https://github.com/NixOS/nixpkgs/issues/211366.

          machine.succeed("ydotool mousemove -a 220 275")

          machine.succeed("ydotool click 0xC0")

          machine.sleep(2)

          machine.screenshot("elementary_greeter_lightdm")

      with subtest("Login with elementary-greeter"):

          machine.send_chars("${user.password}\n")

          machine.wait_until_succeeds('journalctl -t gnome-session-binary --grep "Entering running state"')

      with subtest("Wait for wayland server"):

          machine.wait_for_file("/run/user/${toString user.uid}/wayland-0")