nixos/tests: Add ayatana-indicators test

nixos/tests/all-tests.nix

@@ -124,6 +124,7 @@ in {
   authelia = handleTest ./authelia.nix {};
   avahi = handleTest ./avahi.nix {};
   avahi-with-resolved = handleTest ./avahi.nix { networkd = true; };
+  ayatana-indicators = handleTest ./ayatana-indicators.nix {};
   babeld = handleTest ./babeld.nix {};
   bazarr = handleTest ./bazarr.nix {};
   bcachefs = handleTestOn ["x86_64-linux" "aarch64-linux"] ./bcachefs.nix {};

nixos/tests/ayatana-indicators.nix

@@ -0,0 +1,71 @@
+import ./make-test-python.nix ({ pkgs, lib, ... }: let
+  user = "alice";
+in {
+  name = "ayatana-indicators";
+
+  meta = {
+    maintainers = with lib.maintainers; [ OPNA2608 ];
+  };
+
+  nodes.machine = { config, ... }: {
+    imports = [
+      ./common/auto.nix
+      ./common/user-account.nix
+    ];
+
+    test-support.displayManager.auto = {
+      enable = true;
+      inherit user;
+    };
+
+    services.xserver = {
+      enable = true;
+      desktopManager.mate.enable = true;
+      displayManager.defaultSession = lib.mkForce "mate";
+    };
+
+    services.ayatana-indicators = {
+      enable = true;
+      packages = with pkgs; [
+        ayatana-indicator-messages
+      ];
+    };
+
+    # Services needed by some indicators
+    services.accounts-daemon.enable = true; # messages
+  };
+
+  # TODO session indicator starts up in a semi-broken state, but works fine after a restart. maybe being started before graphical session is truly up & ready?
+  testScript = { nodes, ... }: let
+    runCommandPerIndicatorService = command: lib.strings.concatMapStringsSep "\n" command nodes.machine.systemd.user.targets."ayatana-indicators".wants;
+  in ''
+    start_all()
+    machine.wait_for_x()
+
+    # Desktop environment should reach graphical-session.target
+    machine.wait_for_unit("graphical-session.target", "${user}")
+
+    # MATE relies on XDG autostart to bring up the indicators.
+    # Not sure *when* XDG autostart fires them up, and awaiting pgrep success seems to misbehave?
+    machine.sleep(10)
+
+    # Now check if all indicators were brought up successfully, and kill them for later
+  '' + (runCommandPerIndicatorService (service: let serviceExec = builtins.replaceStrings [ "." ] [ "-" ] service; in ''
+    machine.succeed("pgrep -f ${serviceExec}")
+    machine.succeed("pkill -f ${serviceExec}")
+  '')) + ''
+
+    # Ayatana target is the preferred way of starting up indicators on SystemD session, the graphical session is responsible for starting this if it supports them.
+    # Mate currently doesn't do this, so start it manually for checking (https://github.com/mate-desktop/mate-indicator-applet/issues/63)
+    machine.systemctl("start ayatana-indicators.target", "${user}")
+    machine.wait_for_unit("ayatana-indicators.target", "${user}")
+
+    # Let all indicator services do their startups, potential post-launch crash & restart cycles so we can properly check for failures
+    # Not sure if there's a better way of awaiting this without false-positive potential
+    machine.sleep(10)
+
+    # Now check if all indicator services were brought up successfully
+  '' + runCommandPerIndicatorService (service: ''
+    machine.wait_for_unit("${service}", "${user}")
+  '');
+})

pkgs/by-name/ay/ayatana-indicator-messages/package.nix

@@ -2,6 +2,7 @@
 , lib
 , fetchFromGitHub
 , gitUpdater
+, nixosTests
 , testers
 , accountsservice
 , cmake
@@ -122,7 +123,10 @@ stdenv.mkDerivation (finalAttrs: {
     ayatana-indicators = [
       "ayatana-indicator-messages"
     ];
-    tests.pkg-config = testers.testMetaPkgConfig finalAttrs.finalPackage;
+    tests = {
+      pkg-config = testers.testMetaPkgConfig finalAttrs.finalPackage;
+      vm = nixosTests.ayatana-indicators;
+    };
     updateScript = gitUpdater { };
   };