guile/test-suite/tests/srfi-6.test

;;;; srfi-6.test --- test suite for SRFI-6   -*- scheme -*-
;;;;
;;;; 	Copyright (C) 2003, 2006, 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

(use-modules (test-suite lib))

;; use #:select to see that the bindings we expect are indeed exported
(use-modules ((srfi srfi-6)
	      #:select ((open-input-string  . open-input-string)
			(open-output-string . open-output-string)
			(get-output-string  . get-output-string))))


(with-test-prefix "open-input-string"
  
  (pass-if "eof on empty"
    (let ((port (open-input-string "")))
      (eof-object? (read-char port))))
  
  (pass-if "read-char"
    (let ((port (open-input-string "xyz")))
      (and (char=? #\x (read-char port))
	   (char=? #\y (read-char port))
	   (char=? #\z (read-char port))
	   (eof-object? (read-char port)))))

  (pass-if "read-char, Unicode"
    ;; String ports should always be Unicode-capable.
    ;; See <http://bugs.gnu.org/11197>.
    (with-fluids ((%default-port-encoding "ISO-8859-1"))
      (let ((port (open-input-string "λμ")))
        (and (char=? #\λ (read-char port))
             (char=? #\μ (read-char port))))))

  (with-test-prefix "unread-char"
    
    (pass-if "one char"
      (let ((port (open-input-string "")))
        (unread-char #\x port)
        (and (char=? #\x (read-char port))
	     (eof-object? (read-char port)))))
    
    (pass-if "after eof"
      (let ((port (open-input-string "")))
	(and (eof-object? (read-char port))
	     (begin
	       (unread-char #\x port)
	       (and (char=? #\x (read-char port))
		    (eof-object? (read-char port)))))))
    
    (pass-if "order"
      (let ((port (open-input-string "")))
	(unread-char #\x port)
	(unread-char #\y port)
	(unread-char #\z port)
	(and (char=? #\z (read-char port))
	     (char=? #\y (read-char port))
	     (char=? #\x (read-char port))
	     (eof-object? (read-char port)))))))


(with-test-prefix "open-output-string"

  (pass-if "empty"
    (let ((port (open-output-string)))
      (string=? "" (get-output-string port))))
  
  (pass-if "xyz"
    (let ((port (open-output-string)))
      (display "xyz" port)
      (string=? "xyz" (get-output-string port))))

  (pass-if "λ"
    ;; Writing to an output string should always work.
    ;; See <http://bugs.gnu.org/11197>.
    (with-fluids ((%default-port-encoding "ISO-8859-1"))
      (let ((port (open-output-string)))
        (display "λ" port)
        (string=? "λ" (get-output-string port)))))

  (pass-if "seek"
    (let ((port (open-output-string)))
      (display "abcdef" port)
      (seek port 2 SEEK_SET)
      (display "--" port)
      (string=? "ab--ef" (get-output-string port)))))