nixos/tests/immichframe: fix potential test failures

nixos/tests/web-apps/immichframe.nix

@@ -1,10 +1,18 @@
+{
+  lib,
+  ...
+}:
+
 let
   apiKeyFile = "/tmp/immich-api.key";
   customInterval = 5;
+  user = "alice";
 in
 {
   name = "immichframe";
 
+  meta.maintainers = with lib.maintainers; [ numinit ];
+
   enableOCR = true;
 
   nodes.machine =
@@ -15,11 +23,17 @@ in
       ...
     }:
     {
-      imports = [ ../common/x11.nix ];
+      imports = [
+        ../common/user-account.nix
+        ../common/x11.nix
+      ];
 
       # When setting this to 2500 I got "Kernel panic - not syncing: Out of
       # memory: compulsory panic_on_oom is enabled".
       virtualisation.memorySize = 3000;
+      hardware.graphics.enable = true;
+      environment.variables.XAUTHORITY = "/home/${user}/.Xauthority";
+      test-support.displayManager.auto.user = user;
 
       environment.systemPackages = with pkgs; [
         imagemagick
@@ -69,6 +83,7 @@ in
 
     custom_interval = ${toString customInterval}
 
+    machine.wait_for_x()
     machine.wait_for_unit("immich-server.service")
     machine.wait_for_open_port(2283)
 
@@ -133,11 +148,7 @@ in
     assert len(assets) == 2, assets
 
     # Wait for a photo to be displayed.
-    machine.wait_for_x()
-    machine.execute("xterm -e 'firefox --kiosk http://localhost:8002' >&2 &")
-    machine.wait_for_window("immichFrame")
-    _, active_window = machine.execute("xdotool getactivewindow")
-    machine.succeed(f"xdotool windowsize {quote(active_window.strip())} 100% 100%")
+    machine.execute("su - ${user} -c 'firefox --kiosk http://localhost:8002' >&2 & disown")
     machine.wait_for_text('reproduce this moment')
     machine.wait_for_text('with NixOS tests')
     machine.screenshot("screen")