Add (guix utils), with `bytevector->base32-string'.

* guix/utils.scm, tests/utils.scm: New files.

tests/utils.scm

@@ -0,0 +1,53 @@
+;;; Guix --- Nix package management from Guile.         -*- coding: utf-8 -*-
+;;; Copyright (C) 2012 Ludovic Courtès <ludo@gnu.org>
+;;;
+;;; This file is part of Guix.
+;;;
+;;; 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.
+;;;
+;;; 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 Guix.  If not, see <http://www.gnu.org/licenses/>.
+
+
+(define-module (test-utils)
+  #:use-module (guix utils)
+  #:use-module (srfi srfi-1)
+  #:use-module (srfi srfi-26)
+  #:use-module (srfi srfi-64)
+  #:use-module (rnrs bytevectors))
+
+(test-begin "utils")
+
+(test-assert "bytevector->base32-string"
+  (fold (lambda (bv expected result)
+          (and result
+               (string=? (bytevector->base32-string bv)
+                         expected)))
+        #t
+
+        ;; Examples from RFC 4648.
+        (map string->utf8 '("" "f" "fo" "foo" "foob" "fooba" "foobar"))
+        '(""
+          "my"
+          "mzxq"
+          "mzxw6"
+          "mzxw6yq"
+          "mzxw6ytb"
+          "mzxw6ytboi")))
+
+(test-end)
+
+
+(exit (= (test-runner-fail-count (test-runner-current)) 0))
+
+;;; Local Variables:
+;;; eval: (put 'test-assert 'scheme-indent-function 1)
+;;; End: