nixosTests.pantheon-wayland: init

It is unclear to me how to properly start apps so I am using autostart here.

nixos/tests/all-tests.nix

@@ -803,6 +803,7 @@ in {
   patroni = handleTestOn ["x86_64-linux"] ./patroni.nix {};
   pantalaimon = handleTest ./matrix/pantalaimon.nix {};
   pantheon = handleTest ./pantheon.nix {};
+  pantheon-wayland = handleTest ./pantheon-wayland.nix {};
   paperless = handleTest ./paperless.nix {};
   parsedmarc = handleTest ./parsedmarc {};
   password-option-override-ordering = handleTest ./password-option-override-ordering.nix {};

nixos/tests/pantheon-wayland.nix

@@ -0,0 +1,105 @@
+import ./make-test-python.nix (
+  { pkgs, lib, ... }:
+
+  {
+    name = "pantheon-wayland";
+
+    meta.maintainers = lib.teams.pantheon.members;
+
+    nodes.machine =
+      { nodes, ... }:
+
+      let
+        videosAutostart = pkgs.writeTextFile {
+          name = "autostart-elementary-videos";
+          destination = "/etc/xdg/autostart/io.elementary.videos.desktop";
+          text = ''
+            [Desktop Entry]
+            Version=1.0
+            Name=Videos
+            Type=Application
+            Terminal=false
+            Exec=io.elementary.videos %U
+          '';
+        };
+      in
+      {
+        imports = [ ./common/user-account.nix ];
+
+        # Workaround ".gala-wrapped invoked oom-killer"
+        virtualisation.memorySize = 2047;
+
+        services.xserver.enable = true;
+        services.xserver.desktopManager.pantheon.enable = true;
+        services.displayManager = {
+          autoLogin.enable = true;
+          autoLogin.user = nodes.machine.users.users.alice.name;
+          defaultSession = "pantheon-wayland";
+        };
+
+        # We ship pantheon.appcenter by default when this is enabled.
+        services.flatpak.enable = true;
+
+        # For basic OCR tests.
+        environment.systemPackages = [ videosAutostart ];
+
+        # 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 ];
+      };
+
+    enableOCR = true;
+
+    testScript =
+      { nodes, ... }:
+      let
+        user = nodes.machine.users.users.alice;
+      in
+      ''
+        machine.wait_for_unit("display-manager.service")
+
+        with subtest("Wait for wayland server"):
+            machine.wait_for_file("/run/user/${toString user.uid}/wayland-0")
+
+        with subtest("Check that logging in has given the user ownership of devices"):
+            machine.succeed("getfacl -p /dev/snd/timer | grep -q ${user.name}")
+
+        with subtest("Check if Pantheon components actually start"):
+            # We will specifically check gsd-xsettings here since it is manually pulled up by gala.
+            # https://github.com/elementary/gala/pull/2140
+            for i in ["gala", "io.elementary.wingpanel", "io.elementary.dock", "gsd-media-keys", "gsd-xsettings", "io.elementary.desktop.agent-polkit"]:
+                machine.wait_until_succeeds(f"pgrep -f {i}")
+            for i in ["io.elementary.files.xdg-desktop-portal.service"]:
+                machine.wait_for_unit(i, "${user.name}")
+
+        with subtest("Check if various environment variables are set"):
+            cmd = "xargs --null --max-args=1 echo < /proc/$(pgrep -xf ${pkgs.pantheon.gala}/bin/gala)/environ"
+            machine.succeed(f"{cmd} | grep 'XDG_CURRENT_DESKTOP' | grep 'Pantheon'")
+            machine.succeed(f"{cmd} | grep 'XDG_SESSION_TYPE' | grep 'wayland'")
+            # Hopefully from the sessionPath option.
+            machine.succeed(f"{cmd} | grep 'XDG_DATA_DIRS' | grep 'gsettings-schemas/pantheon-agent-geoclue2'")
+            # Hopefully from login shell.
+            machine.succeed(f"{cmd} | grep '__NIXOS_SET_ENVIRONMENT_DONE' | grep '1'")
+
+        with subtest("Wait for elementary videos autostart"):
+            machine.wait_until_succeeds("pgrep -f io.elementary.videos")
+            machine.wait_for_text("No Videos Open")
+            machine.screenshot("videos")
+
+        with subtest("Trigger multitasking view"):
+            cmd = "dbus-send --session --dest=org.pantheon.gala --print-reply /org/pantheon/gala org.pantheon.gala.PerformAction int32:1"
+            env = "DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/${toString user.uid}/bus"
+            machine.succeed(f"su - ${user.name} -c '{env} {cmd}'")
+            machine.sleep(5)
+            machine.screenshot("multitasking")
+            machine.succeed(f"su - ${user.name} -c '{env} {cmd}'")
+
+        with subtest("Check if gala has ever coredumped"):
+            machine.fail("coredumpctl --json=short | grep gala")
+            # So we can see the dock.
+            machine.execute("pkill -f -9 io.elementary.videos")
+            machine.sleep(10)
+            machine.screenshot("screen")
+      '';
+  }
+)