nixos/rtorrent: add NixOS tests

nixos/tests/all-tests.nix

@@ -824,6 +824,7 @@ in {
   rstudio-server = handleTest ./rstudio-server.nix {};
   rsyncd = handleTest ./rsyncd.nix {};
   rsyslogd = handleTest ./rsyslogd.nix {};
+  rtorrent = handleTest ./rtorrent.nix {};
   rxe = handleTest ./rxe.nix {};
   sabnzbd = handleTest ./sabnzbd.nix {};
   samba = handleTest ./samba.nix {};

nixos/tests/rtorrent.nix

@@ -0,0 +1,25 @@
+import ./make-test-python.nix ({ pkgs, ... }:
+let
+  port = 50001;
+in
+{
+  name = "rtorrent";
+  meta = {
+    maintainers = with pkgs.lib.maintainers; [ thiagokokada ];
+  };
+
+  nodes.machine = { pkgs, ... }: {
+    services.rtorrent = {
+      inherit port;
+      enable = true;
+    };
+  };
+
+  testScript = /* python */ ''
+    machine.start()
+    machine.wait_for_unit("rtorrent.service")
+    machine.wait_for_open_port(${toString port})
+
+    machine.succeed("nc -z localhost ${toString port}")
+  '';
+})

pkgs/applications/networking/p2p/rakshasa-rtorrent/default.nix

@@ -13,9 +13,10 @@
 , pkg-config
 , xmlrpc_c
 , zlib
+, nixosTests
 }:
 
-stdenv.mkDerivation rec {
+stdenv.mkDerivation {
   pname = "rakshasa-rtorrent";
   version = "0.9.8+date=2022-06-20";
 
@@ -53,6 +54,10 @@ stdenv.mkDerivation rec {
     "--with-posix-fallocate"
   ];
 
+  passthru.tests = {
+    inherit (nixosTests) rtorrent;
+  };
+
   enableParallelBuilding = true;
 
   postInstall = ''