utils: Move base16 procedures to (guix base16).

* guix/utils.scm (bytevector->base16-string, base16-string->bytevector):
Move to...
* guix/base16.scm: ... here.  New file.
* tests/utils.scm ("bytevector->base16-string->bytevector"): Move to...
* tests/base16.scm: ... here.  New file.
* Makefile.am (MODULES): Add guix/base16.scm.
(SCM_TESTS): Add tests/base16.scm.
* build-aux/download.scm, guix/derivations.scm,
guix/docker.scm, guix/import/snix.scm, guix/pk-crypto.scm,
guix/scripts/authenticate.scm, guix/scripts/download.scm,
guix/scripts/hash.scm, guix/store.scm, tests/hash.scm,
tests/pk-crypto.scm: Adjust imports accordingly.

4 files changed, 38 insertions, 10 deletions

diff --git a/tests/base16.scm b/tests/base16.scm
new file mode 100644
index 0000000000..a64b650bec
--- /dev/null
+++ b/tests/base16.scm
@@ -0,0 +1,34 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2012, 2017 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-base16)
+  #:use-module (guix base16)
+  #:use-module (srfi srfi-1)
+  #:use-module (srfi srfi-64)
+  #:use-module (rnrs bytevectors))
+
+(test-begin "base16")
+
+(test-assert "bytevector->base16-string->bytevector"
+  (every (lambda (bv)
+           (equal? (base16-string->bytevector
+                    (bytevector->base16-string bv))
+                   bv))
+         (map string->utf8 '("" "f" "fo" "foo" "foob" "fooba" "foobar"))))
+
+(test-end "base16")
diff --git a/tests/hash.scm b/tests/hash.scm
index 86501dca2d..b189e435c8 100644
--- a/tests/hash.scm
+++ b/tests/hash.scm
@@ -18,7 +18,7 @@
 
 (define-module (test-hash)
   #:use-module (guix hash)
-  #:use-module (guix utils)
+  #:use-module (guix base16)
   #:use-module (srfi srfi-1)
   #:use-module (srfi srfi-11)
   #:use-module (srfi srfi-64)
diff --git a/tests/pk-crypto.scm b/tests/pk-crypto.scm
index 5024a15a43..fe33a6f7b5 100644
--- a/tests/pk-crypto.scm
+++ b/tests/pk-crypto.scm
@@ -1,5 +1,5 @@
 ;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2013, 2014 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2013, 2014, 2017 Ludovic Courtès <ludo@gnu.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -19,6 +19,7 @@
 (define-module (test-pk-crypto)
   #:use-module (guix pk-crypto)
   #:use-module (guix utils)
+  #:use-module (guix base16)
   #:use-module (guix hash)
   #:use-module (srfi srfi-1)
   #:use-module (srfi srfi-11)
diff --git a/tests/utils.scm b/tests/utils.scm
index bcfaa14faa..035886dd16 100644
--- a/tests/utils.scm
+++ b/tests/utils.scm
@@ -1,5 +1,5 @@
 ;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2012, 2013, 2014, 2015, 2016 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2012, 2013, 2014, 2015, 2016, 2017 Ludovic Courtès <ludo@gnu.org>
 ;;; Copyright © 2014 Eric Bavier <bavier@member.fsf.org>
 ;;; Copyright © 2016 Mathieu Lirzin <mthl@gnu.org>
 ;;;
@@ -36,13 +36,6 @@
 
 (test-begin "utils")
 
-(test-assert "bytevector->base16-string->bytevector"
-  (every (lambda (bv)
-           (equal? (base16-string->bytevector
-                    (bytevector->base16-string bv))
-                   bv))
-         (map string->utf8 '("" "f" "fo" "foo" "foob" "fooba" "foobar"))))
-
 (test-assert "gnu-triplet->nix-system"
   (let ((samples '(("i586-gnu0.3" "i686-gnu")
                    ("x86_64-unknown-linux-gnu" "x86_64-linux")