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+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2022 Simon Streit <simon@netpanic.org>
+;;;
+;;; 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 samba)
+  #:use-module (gnu tests)
+  #:use-module (gnu system)
+  #:use-module (gnu system vm)
+  #:use-module (gnu services)
+  #:use-module (gnu services networking)
+  #:use-module (gnu services samba)
+  #:use-module (gnu packages samba)
+  #:use-module (guix gexp)
+  #:use-module (guix store)
+  #:export (%test-samba))
+
+
+;;;
+;;; The Samba service.
+;;;
+
+(define %samba-os
+  (let ((base-os (simple-operating-system
+                  (simple-service 'create-target-directory activation-service-type
+                                  #~(begin
+                                      (mkdir-p "/srv/samba/guest")
+                                      (chown "/srv/samba/guest"
+                                             (passwd:uid (getpw "nobody"))
+                                             (passwd:gid (getpw "nobody")))))
+                  (service dhcp-client-service-type)
+                  (service samba-service-type
+                           (samba-configuration
+                            (config-file (plain-file "smb.conf" "
+[global]
+    workgroup = WORKGROUP
+    server string = Samba Server
+    server role = standalone server
+    log file = /var/log/samba/log.%m
+    logging = file
+
+[guest]
+    path = /srv/samba/guest
+    read only = no
+    guest ok = yes
+    guest only = yes
+")))))))
+    (operating-system
+      (inherit base-os)
+      (packages (cons samba (operating-system-packages base-os))))))
+
+(define* (run-samba-test)
+  "Return a test of an OS running Samba service."
+
+  (define vm
+    (virtual-machine
+     (operating-system (marionette-operating-system
+                        %samba-os
+                        #:imported-modules '((gnu services herd))))
+     (port-forwardings '((8135 . 135)
+                         (8137 . 137)
+                         (8138 . 138)
+                         (8445 . 445)))))
+
+  (define test
+    (with-imported-modules '((gnu build marionette))
+      #~(begin
+          (use-modules (gnu build marionette)
+                       (srfi srfi-26)
+                       (srfi srfi-64))
+
+          (define marionette
+            (make-marionette '(#$vm)))
+
+          (test-runner-current (system-test-runner #$output))
+          (test-begin "samba")
+
+          (test-assert "samba-smbd running"
+            (marionette-eval
+             '(begin
+                (use-modules (gnu services herd))
+                (start-service 'samba-smbd))
+             marionette))
+
+          (test-assert "samba-nmbd running"
+            (marionette-eval
+             '(begin
+                (use-modules (gnu services herd))
+                (start-service 'samba-nmbd))
+             marionette))
+
+          (test-assert "samba-winbindd running"
+            (marionette-eval
+             '(begin
+                (use-modules (gnu services herd))
+                (start-service 'samba-winbindd))
+             marionette))
+
+          (test-assert "smbd service process id"
+            (let ((pid
+                   (number->string (wait-for-file "/var/run/samba/smbd.pid"
+                                                  marionette))))
+              (marionette-eval `(file-exists? (string-append "/proc/" ,pid))
+                               marionette)))
+
+          (test-assert "nmbd service process id"
+            (let ((pid
+                   (number->string (wait-for-file "/var/run/samba/nmbd.pid"
+                                                  marionette))))
+              (marionette-eval `(file-exists? (string-append "/proc/" ,pid))
+                               marionette)))
+
+          (test-assert "winbindd service process id"
+            (let ((pid
+                   (number->string (wait-for-file "/var/run/samba/winbindd.pid"
+                                                  marionette))))
+              (marionette-eval `(file-exists? (string-append "/proc/" ,pid))
+                               marionette)))
+
+          (test-assert "samba-smbd is listening for peers"
+            (wait-for-tcp-port 445 marionette))
+
+          (test-equal "smbclient connect"
+            0
+            (marionette-eval
+             '(system* #$(file-append samba "/bin/smbclient")
+                       "--list=localhost" "--no-pass")
+             marionette))
+
+          (test-equal "smbclient connect"
+            0
+            (marionette-eval
+             '(system* #$(file-append samba "/bin/smbclient")
+                       "--list=localhost" "--no-pass")
+             marionette))
+
+          (test-end))))
+
+  (gexp->derivation "samba-test" test))
+
+(define %test-samba
+  (system-test
+   (name "samba")
+   (description "Connect to a running Samba daemon.")
+   (value (run-samba-test))))