guile/test-suite/tests/srfi-31.test

;;;; srfi-31.test --- Test suite for Guile's SRFI-31 functions. -*- scheme -*-
;;;;
;;;; Copyright (C) 2004, 2006, 2010, 2012 Free Software Foundation, Inc.
;;;;
;;;; 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 (test-suite test-srfi-31)
  #:use-module (test-suite lib)
  #:use-module (srfi srfi-31))

(with-test-prefix "rec special form"

  (pass-if-exception "bogus variable"
    exception:syntax-pattern-unmatched
    (eval '(rec #:foo) (current-module)))

  (pass-if "rec expressions"
    (let ((ones-list (rec ones (cons 1 (delay ones)))))
      (and (= 1 (car ones-list))
           (= 1 (car (force (cdr ones-list)))))))

  (pass-if "rec functions"
    (let ((test-func (rec (add-upto n)
                       (if (positive? n)
                           (+ n (add-upto (- n 1)))
                           0))))
      (= 15 (test-func 5)))))