guile/test-suite/tests/srfi-11.test

;;;; srfi-11.test --- exercise SRFI-11 let-values
;;;;
;;;; Copyright 2004, 2006 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-11)
  #:use-module (test-suite lib)
  #:use-module (srfi srfi-11))


;;
;; let-values
;;

(with-test-prefix "let-values"

  (with-test-prefix "no exprs"

    (pass-if "no values"
      (let-values ()
	#t)))

  (with-test-prefix "one expr"

    (pass-if "no values"
      (let-values ((() (values)))
	#t))

    (pass-if "one value"
      (let-values (((x) (values 1)))
	(equal? x 1)))

    (pass-if "one value as rest"
      (let-values ((x (values 1)))
	(equal? x '(1))))

    (pass-if "two values"
      (let-values (((x y) (values 1 2)))
	(and (equal? x 1)
	     (equal? y 2)))))

  (with-test-prefix "two exprs"

    (pass-if "no values each"
      (let-values ((() (values))
		   (() (values)))
	#t))

    (pass-if "one value / no values"
      (let-values (((x) (values 1))
		   (() (values)))
	(equal? x 1)))

    (pass-if "one value each"
      (let-values (((x) (values 1))
		   ((y) (values 2)))
	(and (equal? x 1)
	     (equal? y 2))))

    (pass-if-exception "first binding invisible to second expr"
	'(unbound-variable . ".*")
      (let-values (((x) (values 1))
		   ((y) (values (1+ x))))
	#f))

    (pass-if "first binding with rest invisible to second expr"
      (let* ((a 1)
             (b (let-values (((a . b) (values 2 3))
                             (c (begin (set! a 9) 4)))
                  (list a b c))))
        (equal? (cons a b) '(9 2 (3) (4)))))))

;;
;; let*-values
;;

(with-test-prefix "let*-values"

  (with-test-prefix "no exprs"

    (pass-if "no values"
      (let*-values ()
	#t)))

  (with-test-prefix "one expr"

    (pass-if "no values"
      (let*-values ((() (values)))
	#t))

    (pass-if "one value"
      (let*-values (((x) (values 1)))
	(equal? x 1)))

    (pass-if "one value as rest"
      (let-values ((x (values 1)))
	(equal? x '(1))))

    (pass-if "two values"
      (let*-values (((x y) (values 1 2)))
	(and (equal? x 1)
	     (equal? y 2)))))

  (with-test-prefix "two exprs"

    (pass-if "no values each"
      (let*-values ((() (values))
		    (() (values)))
	#t))

    (pass-if "one value / no values"
      (let*-values (((x) (values 1))
		    (() (values)))
	(equal? x 1)))

    (pass-if "one value each"
      (let*-values (((x) (values 1))
		    ((y) (values 2)))
	(and (equal? x 1)
	     (equal? y 2))))

    (pass-if "first binding visible to second expr"
      (let*-values (((x) (values 1))
		    ((y) (values (1+ x))))
	(and (equal? x 1)
	     (equal? y 2))))))