nixos/xpadneo: add sanity test

nixos/tests/all-tests.nix

@@ -633,6 +633,7 @@ in {
   xfce = handleTest ./xfce.nix {};
   xmonad = handleTest ./xmonad.nix {};
   xmonad-xdg-autostart = handleTest ./xmonad-xdg-autostart.nix {};
+  xpadneo = handleTest ./xpadneo.nix {};
   xrdp = handleTest ./xrdp.nix {};
   xss-lock = handleTest ./xss-lock.nix {};
   xterm = handleTest ./xterm.nix {};

nixos/tests/xpadneo.nix

@@ -0,0 +1,18 @@
+import ./make-test-python.nix ({ lib, pkgs, ... }: {
+  name = "xpadneo";
+  meta.maintainers = with lib.maintainers; [ kira-bruneau ];
+
+  nodes = {
+    machine = {
+      config.hardware.xpadneo.enable = true;
+    };
+  };
+
+  # This is just a sanity check to make sure the module was
+  # loaded. We'd have to find some way to mock an xbox controller if
+  # we wanted more in-depth testing.
+  testScript = ''
+    machine.start();
+    machine.succeed("modinfo hid_xpadneo | grep 'version:\s\+${pkgs.linuxPackages.xpadneo.version}'")
+  '';
+})

pkgs/os-specific/linux/xpadneo/default.nix

@@ -1,4 +1,10 @@
-{ lib, stdenv, fetchFromGitHub, kernel, bluez }:
+{ lib
+, stdenv
+, fetchFromGitHub
+, kernel
+, bluez
+, nixosTests
+}:
 
 stdenv.mkDerivation (finalAttrs: {
   pname = "xpadneo";
@@ -29,6 +35,10 @@ stdenv.mkDerivation (finalAttrs: {
   installFlags = [ "INSTALL_MOD_PATH=${placeholder "out"}" ];
   installTargets = [ "modules_install" ];
 
+  passthru.tests = {
+    xpadneo = nixosTests.xpadneo;
+  };
+
   meta = with lib; {
     description = "Advanced Linux driver for Xbox One wireless controllers";
     homepage = "https://atar-axis.github.io/xpadneo";