tests/pdns-recursor: add

nixos/tests/all-tests.nix

@@ -223,6 +223,7 @@ in
   syncthing-relay = handleTest ./syncthing-relay.nix {};
   systemd = handleTest ./systemd.nix {};
   systemd-confinement = handleTest ./systemd-confinement.nix {};
+  pdns-recursor = handleTest ./pdns-recursor.nix {};
   taskserver = handleTest ./taskserver.nix {};
   telegraf = handleTest ./telegraf.nix {};
   tomcat = handleTest ./tomcat.nix {};

nixos/tests/pdns-recursor.nix

@@ -0,0 +1,12 @@
+import ./make-test.nix ({ pkgs, lib, ... }: {
+  name = "powerdns";
+
+  nodes.server = { ... }: {
+    services.pdns-recursor.enable = true;
+  };
+
+  testScript = ''
+    $server->waitForUnit("pdns-recursor");
+    $server->succeed("echo | ${lib.getBin pkgs.netcat}/bin/nc -v localhost 53")
+  '';
+})