;;;; strings.test --- test suite for Guile's string functions    -*- mode: scheme; coding: iso-8859-1 -*-
;;;;
;;;; Copyright (C) 2009 Free Software Foundation, Inc.
;;;; 
;;;; This program is free software; you can redistribute it and/or modify
;;;; it under the terms of the GNU General Public License as published by
;;;; the Free Software Foundation; either version 2, or (at your option)
;;;; any later version.
;;;; 
;;;; This program 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 General Public License for more details.
;;;; 
;;;; You should have received a copy of the GNU General Public License
;;;; along with this software; see the file COPYING.  If not, write to
;;;; the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;;;; Boston, MA 02110-1301 USA

(define-module (test-strings)
  #:use-module (test-suite lib)
  #:use-module (srfi srfi-1))

(define exception:conversion
  (cons 'misc-error "^cannot convert to output locale"))

;; Create a string from integer char values, eg. (string-ints 65) => "A"
(define (string-ints . args)
  (apply string (map integer->char args)))

;; Set locale to the environment's locale, so that the prints look OK.
(define oldlocale #f)
(if (defined? 'setlocale)
    (set! oldlocale (setlocale LC_ALL "")))

(define s1 "última")
(define s2 "cédula")
(define s3 "años")
(define s4 "¿Cómo?")

(with-test-prefix "string length"

  (pass-if "última"
	   (eq? (string-length s1) 6))
    
  (pass-if "cédula"
	   (eq? (string-length s2) 6))

  (pass-if "años"
	   (eq? (string-length s3) 4))

  (pass-if "¿Cómo?"
	   (eq? (string-length s4) 6)))

(with-test-prefix "internal encoding"

  (pass-if "última"
	   (string=? s1 (string-ints #xfa #x6c #x74 #x69 #x6d #x61)))

  (pass-if "cédula"
	   (string=? s2 (string-ints #x63 #xe9 #x64 #x75 #x6c #x61)))

  (pass-if "años"
	   (string=? s3 (string-ints #x61 #xf1 #x6f #x73)))
 
  (pass-if "¿Cómo?"
	   (string=? s4 (string-ints #xbf #x43 #xf3 #x6d #x6f #x3f))))

(with-test-prefix "chars"
 
  (pass-if "última"
	   (list= eqv? (string->list s1)
		  (list #\ú #\l #\t #\i #\m #\a)))
  
  (pass-if "cédula"
	   (list= eqv? (string->list s2)
		  (list #\c #\é #\d #\u #\l #\a)))

  (pass-if "años"
	   (list= eqv? (string->list s3)
		  (list #\a #\ñ #\o #\s)))

  (pass-if "¿Cómo?"
	   (list= eqv? (string->list s4)
		  (list #\¿ #\C #\ó #\m #\o #\?))))

;; Check that the output is in ISO-8859-1 encoding
(with-test-prefix "display"
 
  (pass-if "s1"
	   (let ((pt (open-output-string)))
	     (set-port-encoding! pt "ISO-8859-1")
	     (display s1 pt)
	     (list= eqv? 
		    (list #xfa #x6c #x74 #x69 #x6d #x61)
		    (u8vector->list
		     (get-output-locale-u8vector pt)))))

  (pass-if "s2"
	   (let ((pt (open-output-string)))
	     (set-port-encoding! pt "ISO-8859-1")
	     (display s2 pt)
	     (list= eqv? 
		    (list #x63 #xe9 #x64 #x75 #x6c #x61)
		    (u8vector->list
		     (get-output-locale-u8vector pt))))))

(with-test-prefix "symbols == strings"

  (pass-if "última"
	   (eq? (string->symbol s1) 'última))

  (pass-if "cédula"
	   (eq? (string->symbol s2) 'cédula))

  (pass-if "años"
	   (eq? (string->symbol s3) 'años))
 
  (pass-if "¿Cómo?"
	   (eq? (string->symbol s4) '¿Cómo?)))

(with-test-prefix "non-ascii variable names"

  (pass-if "1"
	   (let ((á 1)
		 (ñ 2))
	     (eq? (+ á ñ) 3))))

(with-test-prefix "output errors"

  (pass-if-exception "char 256" exception:conversion
		     (let ((pt (open-output-string)))
		       (set-port-encoding! pt "ISO-8859-1")
		       (set-port-conversion-strategy! pt 'error)
		       (display (string-ints 256) pt))))

;; Reset locales
(if (defined? 'setlocale)
    (setlocale LC_ALL oldlocale))