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+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2020 Oleg Pykhalov <go.wigust@gmail.com>
+;;;
+;;; 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 package-management)
+  #:use-module (gnu packages base)
+  #:use-module (gnu packages package-management)
+  #:use-module (gnu services)
+  #:use-module (gnu services networking)
+  #:use-module (gnu services nix)
+  #:use-module (gnu system)
+  #:use-module (gnu system vm)
+  #:use-module (gnu tests)
+  #:use-module (guix gexp)
+  #:use-module (guix packages)
+  #:export (%test-nix))
+
+;;; Commentary:
+;;;
+;;; This module provides a test definition for the nix-daemon
+;;;
+;;; Code:
+
+(define* (run-nix-test name test-os)
+  "Run tests in TEST-OS, which has nix-daemon running."
+  (define os
+    (marionette-operating-system
+     test-os
+     #:imported-modules '((gnu services herd))))
+
+  (define vm
+    (virtual-machine
+     (operating-system os)
+     (port-forwardings '((8080 . 80)))
+     (memory-size 1024)))
+
+  (define test
+    (with-imported-modules '((gnu build marionette))
+      #~(begin
+          (use-modules (srfi srfi-11)
+                       (srfi srfi-64)
+                       (gnu build marionette)
+                       (web client)
+                       (web response))
+
+          (define marionette
+            (make-marionette (list #$vm)))
+
+          (mkdir #$output)
+          (chdir #$output)
+
+          (test-begin #$name)
+
+          ;; XXX: Shepherd reads the config file *before* binding its control
+          ;; socket, so /var/run/shepherd/socket might not exist yet when the
+          ;; 'marionette' service is started.
+          (test-assert "shepherd socket ready"
+            (marionette-eval
+             `(begin
+                (use-modules (gnu services herd))
+                (let loop ((i 10))
+                  (cond ((file-exists? (%shepherd-socket-file))
+                         #t)
+                        ((> i 0)
+                         (sleep 1)
+                         (loop (- i 1)))
+                        (else
+                         'failure))))
+             marionette))
+
+          (test-assert "Nix daemon running"
+            (marionette-eval
+             '(begin
+                ;; Wait for nix-daemon to be up and running.
+                (start-service 'nix-daemon)
+                (with-output-to-file "guix-test.nix"
+                  (lambda ()
+                    (display "\
+with import <nix/config.nix>;
+
+derivation {
+  system = builtins.currentSystem;
+  name = \"guix-test\";
+  builder = shell;
+  args = [\"-c\" \"mkdir $out\\necho FOO > $out/foo\"];
+  PATH = coreutils;
+}
+")))
+                (zero? (system* (string-append #$nix "/bin/nix-build")
+                                "--substituters" "" "--debug" "--no-out-link"
+                                "guix-test.nix")))
+             marionette))
+
+	  (test-end)
+
+          (exit (= (test-runner-fail-count (test-runner-current)) 0)))))
+
+  (gexp->derivation (string-append name "-test") test))
+
+(define %nix-os
+  ;; Return operating system under test.
+  (let ((base-os
+         (simple-operating-system
+          (service nix-service-type)
+	  (service dhcp-client-service-type))))
+    (operating-system
+      (inherit base-os)
+      (packages (cons nix (operating-system-packages base-os))))))
+
+(define %test-nix
+  (system-test
+   (name "nix")
+   (description "Connect to a running nix-daemon")
+   (value (run-nix-test name %nix-os))))
+
+;;; package-management.scm ends here