;;;; foreign.test --- FFI.           -*- mode: scheme; coding: utf-8; -*-
;;;;
;;;; 	Copyright (C) 2010 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

;;;
;;; See also ../standalone/test-ffi for FFI tests.
;;;

(define-module (test-foreign)
  #:use-module (system foreign)
  #:use-module (rnrs bytevector)
  #:use-module (test-suite lib))


(with-test-prefix "null pointer"

  (pass-if "zero"
    (= 0 (foreign-ref %null-pointer)))

  (pass-if-exception "foreign-set! %null-pointer"
    exception:null-pointer-error
    (foreign-set! %null-pointer 2))

  (pass-if "foreign-set! other-null-pointer"
    (let ((f (bytevector->foreign (make-bytevector 2))))
      (and (not (= 0 (foreign-ref f)))
           (begin
             (foreign-set! f 0)
             (= 0 (foreign-ref f)))
           (begin
             ;; Here changing the pointer value of F is perfectly valid.
             (foreign-set! f 777)
             (= 777 (foreign-ref f))))))

  (pass-if-exception "foreign->bytevector %null-pointer"
    exception:null-pointer-error
    (foreign->bytevector %null-pointer))

  (pass-if-exception "foreign->bytevector other-null-pointer"
    exception:null-pointer-error
    (let ((f (bytevector->foreign (make-bytevector 2))))
      (foreign-set! f 0)
      (foreign->bytevector f))))