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+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2013, 2014 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 (guix tests)
+ #:use-module (guix store)
+ #:use-module (guix derivations)
+ #:use-module (guix packages)
+ #:use-module (gnu packages bootstrap)
+ #:use-module (srfi srfi-34)
+ #:use-module (rnrs bytevectors)
+ #:export (open-connection-for-tests
+ random-text
+ random-bytevector))
+
+;;; Commentary:
+;;;
+;;; This module provide shared infrastructure for the test suite. For
+;;; internal use only.
+;;;
+;;; Code:
+
+(define (open-connection-for-tests)
+ "Open a connection to the build daemon for tests purposes and return it."
+ (guard (c ((nix-error? c)
+ (format (current-error-port)
+ "warning: build daemon error: ~s~%" c)
+ #f))
+ (let ((store (open-connection)))
+ ;; Make sure we build everything by ourselves.
+ (set-build-options store #:use-substitutes? #f)
+
+ ;; Use the bootstrap Guile when running tests, so we don't end up
+ ;; building everything in the temporary test store.
+ (%guile-for-build (package-derivation store %bootstrap-guile))
+
+ store)))
+
+(define %seed
+ (seed->random-state (logxor (getpid) (car (gettimeofday)))))
+
+(define (random-text)
+ "Return the hexadecimal representation of a random number."
+ (number->string (random (expt 2 256) %seed) 16))
+
+(define (random-bytevector n)
+ "Return a random bytevector of N bytes."
+ (let ((bv (make-bytevector n)))
+ (let loop ((i 0))
+ (if (< i n)
+ (begin
+ (bytevector-u8-set! bv i (random 256 %seed))
+ (loop (1+ i)))
+ bv))))
+
+;;; tests.scm ends here