guile/test-suite/tests/brainfuck.test

;;;; test brainfuck compilation -*- scheme -*-
;;;;
;;;; This library is free software; you can redistribute it and/or
;;;; modify it under the terms of the GNU Lesser General Public
;;;; License as published by the Free Software Foundation; either
;;;; version 3 of the License, or (at your option) any later version.
;;;; 
;;;; This library 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
;;;; Lesser General Public License for more details.
;;;; 
;;;; You should have received a copy of the GNU Lesser General Public
;;;; License along with this library; if not, write to the Free Software
;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

(define-module (tests brainfuck)
  #:use-module (test-suite lib)
  #:use-module (system base compile))

;; This program taken from Wikipedia's brainfuck introduction page.
(define prog "
   +++ +++ +++ +           initialize counter (cell #0) to 10
   [                       use loop to set the next four cells to 70/100/30/10
       > +++ +++ +             add  7 to cell #1
       > +++ +++ +++ +         add 10 to cell #2 
       > +++                   add  3 to cell #3
       > +                     add  1 to cell #4
       <<< < -                 decrement counter (cell #0)
   ]                   
   >++ .                   print 'H'
   >+.                     print 'e'
   +++ +++ +.              print 'l'
   .                       print 'l'
   +++ .                   print 'o'
   >++ .                   print ' '
   <<+ +++ +++ +++ +++ ++. print 'W'
   >.                      print 'o'
   +++ .                   print 'r'
   --- --- .               print 'l'
   --- --- --.             print 'd'
   >+.                     print '!'")

(pass-if
 (equal? (with-output-to-string
          (lambda ()
            (call-with-input-string
             prog
             (lambda (port)
               (read-and-compile port #:from 'brainfuck #:to 'value)))))
         "Hello World!"))