services: Add luanti-service-type.

* gnu/services/games.scm (luanti-configuration): New variable.
(%luanti-account): Likewise.
(luanti-activation): New procedure.
(luanti-shepherd-service): Likewise.
(luanti-service-type): New variable.
* gnu/tests/games.scm: New file.

Change-Id: I65a1dcf832fa8add9c9d278d82bab91ca3eef086
Reviewed-by: Liliana Marie Prikler <liliana.prikler@gmail.com>

1 files changed, 108 insertions, 0 deletions

diff --git a/gnu/tests/games.scm b/gnu/tests/games.scm
new file mode 100644
index 00000000000..52391f0caa9
--- /dev/null
+++ b/gnu/tests/games.scm
@@ -0,0 +1,108 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2025 Maxim Cournoyer <maxim@guixotic.coop>
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; GNU Guix is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (gnu tests games)
+  #:use-module (gnu packages luanti)
+  #:use-module (gnu tests)
+  #:use-module (gnu services)
+  #:use-module (gnu services games)
+  #:use-module (gnu system)
+  #:use-module (gnu system vm)
+  #:use-module (guix gexp)
+  #:use-module (guix modules)
+  #:export (%test-luanti))
+
+(define (run-luanti-test name config)
+  "Run a test of an OS running LUANTI-SERVICE."
+  (define os
+    (marionette-operating-system
+     (simple-operating-system
+      (service luanti-service-type config))
+     #:imported-modules '((gnu build dbus-service)
+                          (gnu services herd))))
+
+  (define vm (virtual-machine
+               (operating-system os)
+               (memory-size 1024)))
+
+  (define test
+    (with-imported-modules (source-module-closure
+                            '((gnu build marionette)))
+      #~(begin
+          (use-modules (gnu build marionette)
+                       (srfi srfi-64))
+
+          (define marionette
+            (make-marionette (list #$vm)))
+
+          (test-runner-current (system-test-runner #$output))
+          (test-begin "luanti")
+
+          (test-assert "luanti service can be stopped"
+            (marionette-eval
+             '(begin
+                (use-modules (gnu services herd))
+                (stop-service 'luanti))
+             marionette))
+
+          (test-assert "luanti service can be started"
+            (marionette-eval
+             '(begin
+                (use-modules (gnu services herd))
+                (start-service 'luanti))
+             marionette))
+
+          (test-assert "luanti server is responding on configured port"
+            ;; This is based on the Python script example in doc/protocol.txt.
+            (marionette-eval
+             `(begin
+                (use-modules ((gnu build dbus-service) #:select (with-retries))
+                             (gnu services herd)
+                             (ice-9 match)
+                             (rnrs bytevectors)
+                             (rnrs bytevectors gnu))
+
+                (define sock (socket PF_INET SOCK_DGRAM 0))
+                (define addr (make-socket-address AF_INET INADDR_LOOPBACK
+                                                  ,#$(luanti-configuration-port
+                                                      config)))
+                (define probe #vu8(#x4f #x45 #x74 #x03 #x00 #x00 #x00 #x01))
+                (define buf (make-bytevector 1000))
+
+                (with-retries 25 1
+                  (sendto sock probe addr)
+                  (match (select (list sock) '() '() 2) ;limit time to block
+                    (((sock) _ _)
+                     (match (recvfrom! sock buf)
+                       ((byte-count . _)
+                        (and (>= (pk 'byte-count byte-count) 14)
+                             (pk 'peer-id (bytevector-slice buf 12 2)))))))))
+             marionette))
+
+          (test-end))))
+
+  (gexp->derivation name test))
+
+(define %test-luanti
+  (system-test
+   (name "luanti")
+   (description "Connect to a running Luanti server.")
+   (value (run-luanti-test name (luanti-configuration
+                                 (game luanti-mineclonia)
+                                 ;; To test some extra code paths.
+                                 (mods (list luanti-whitelist)))))))