nixos/jackett: Add test for jackett to ensure startup

nixos/tests/all-tests.nix

@@ -107,6 +107,7 @@ in
   initrdNetwork = handleTest ./initrd-network.nix {};
   installer = handleTest ./installer.nix {};
   ipv6 = handleTest ./ipv6.nix {};
+  jackett = handleTest ./jackett.nix {};
   jenkins = handleTest ./jenkins.nix {};
   #kafka = handleTest ./kafka.nix {}; # broken since openjdk: 8u181 -> 8u192
   kerberos = handleTest ./kerberos/default.nix {};

nixos/tests/jackett.nix

@@ -0,0 +1,18 @@
+import ./make-test.nix ({ lib, ... }:
+
+with lib;
+
+rec {
+  name = "jackett";
+  meta.maintainers = with maintainers; [ etu ];
+
+  nodes.machine =
+    { pkgs, ... }:
+    { services.jackett.enable = true; };
+
+  testScript = ''
+    $machine->waitForUnit('jackett.service');
+    $machine->waitForOpenPort('9117');
+    $machine->succeed("curl --fail http://localhost:9117/");
+  '';
+})