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diff --git a/tests/ipfs.scm b/tests/ipfs.scm
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+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2018 Ludovic Courtès <ludo@gnu.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 (test-ipfs)
+  #:use-module (guix ipfs)
+  #:use-module ((guix utils) #:select (call-with-temporary-directory))
+  #:use-module (guix tests)
+  #:use-module (web uri)
+  #:use-module (srfi srfi-64))
+
+;; Test the (guix ipfs) module.
+
+(define (ipfs-gateway-running?)
+  "Return true if the IPFS gateway is running at %IPFS-BASE-URL."
+  (let* ((uri    (string->uri (%ipfs-base-url)))
+         (socket (socket AF_INET SOCK_STREAM 0)))
+    (define connected?
+      (catch 'system-error
+        (lambda ()
+          (format (current-error-port)
+                  "probing IPFS gateway at localhost:~a...~%"
+                  (uri-port uri))
+          (connect socket AF_INET INADDR_LOOPBACK (uri-port uri))
+          #t)
+        (const #f)))
+
+    (close-port socket)
+    connected?))
+
+(unless (ipfs-gateway-running?)
+  (test-skip 1))
+
+(test-assert "add-file-tree + restore-file-tree"
+  (call-with-temporary-directory
+   (lambda (directory)
+     (let* ((source  (dirname (search-path %load-path "guix/base32.scm")))
+            (target  (string-append directory "/r"))
+            (content (pk 'content (add-file-tree source))))
+       (restore-file-tree (content-name content) target)
+       (file=? source target)))))