nixos/opentabletdriver: add tests

nixos/tests/all-tests.nix

@@ -281,6 +281,7 @@ in
   openssh = handleTest ./openssh.nix {};
   openstack-image-metadata = (handleTestOn ["x86_64-linux"] ./openstack-image.nix {}).metadata or {};
   openstack-image-userdata = (handleTestOn ["x86_64-linux"] ./openstack-image.nix {}).userdata or {};
+  opentabletdriver = handleTest ./opentabletdriver.nix {};
   image-contents = handleTest ./image-contents.nix {};
   orangefs = handleTest ./orangefs.nix {};
   os-prober = handleTestOn ["x86_64-linux"] ./os-prober.nix {};

nixos/tests/opentabletdriver.nix

@@ -0,0 +1,27 @@
+import ./make-test-python.nix ( { pkgs, ... }: {
+  name = "opentabletdriver";
+  meta = {
+    maintainers = with pkgs.stdenv.lib.maintainers; [ thiagokokada ];
+  };
+
+  machine = { pkgs, ... }:
+    {
+      imports = [
+        ./common/user-account.nix
+        ./common/x11.nix
+      ];
+      test-support.displayManager.auto.user = "alice";
+      hardware.opentabletdriver.enable = true;
+    };
+
+  testScript =
+    ''
+      machine.start()
+      machine.wait_for_x()
+      machine.wait_for_unit("opentabletdriver.service", "alice")
+
+      machine.succeed("cat /etc/udev/rules.d/30-opentabletdriver.rules")
+      # Will fail if service is not running
+      machine.succeed("otd detect")
+    '';
+})

pkgs/tools/X11/opentabletdriver/default.nix

@@ -17,6 +17,7 @@
 , copyDesktopItems
 , makeDesktopItem
 , makeWrapper
+, nixosTests
 , wrapGAppsHook
 }:
 
@@ -154,6 +155,10 @@ stdenv.mkDerivation rec {
   dontWrapGApps = true;
   dontStrip = true;
 
+  passthru.tests = {
+    otd-runs = nixosTests.opentabletdriver;
+  };
+
   meta = with lib; {
     description = "Open source, cross-platform, user-mode tablet driver";
     homepage = "https://github.com/InfinityGhost/OpenTabletDriver";