;;;; strings.test --- test suite for Guile's string functions    -*- scheme -*-
;;;; Jim Blandy <jimb@red-bean.com> --- August 1999
;;;;
;;;; Copyright (C) 1999, 2001, 2004, 2005, 2006, 2008 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))


(define exception:read-only-string
  (cons 'misc-error "^string is read-only"))

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


;;
;; string=?
;;

(with-test-prefix "string=?"

  (pass-if "respects 1st parameter's string length"
    (not (string=? "foo\0" "foo")))

  (pass-if "respects 2nd paramter's string length"
    (not (string=? "foo" "foo\0")))

  (with-test-prefix "wrong argument type"

    (pass-if-exception "1st argument symbol"
      exception:wrong-type-arg
      (string=? 'a "a"))

    (pass-if-exception "2nd argument symbol"
      exception:wrong-type-arg
      (string=? "a" 'b))))

;;
;; string<?
;;

(with-test-prefix "string<?"

  (pass-if "respects string length"
    (and (not (string<? "foo\0a" "foo\0a"))
	 (string<? "foo\0a" "foo\0b")))

  (with-test-prefix "wrong argument type"

    (pass-if-exception "1st argument symbol"
      exception:wrong-type-arg
      (string<? 'a "a"))

    (pass-if-exception "2nd argument symbol"
      exception:wrong-type-arg
      (string<? "a" 'b)))

  (pass-if "same as char<?"
    (eq? (char<? (integer->char 0) (integer->char 255))
	 (string<? (string-ints 0) (string-ints 255)))))

;;
;; string-ci<?
;;

(with-test-prefix "string-ci<?"

  (pass-if "respects string length"
    (and (not (string-ci<? "foo\0a" "foo\0a"))
	 (string-ci<? "foo\0a" "foo\0b")))

  (with-test-prefix "wrong argument type"

    (pass-if-exception "1st argument symbol"
      exception:wrong-type-arg
      (string-ci<? 'a "a"))

    (pass-if-exception "2nd argument symbol"
      exception:wrong-type-arg
      (string-ci<? "a" 'b)))

  (pass-if "same as char-ci<?"
    (eq? (char-ci<? (integer->char 0) (integer->char 255))
	 (string-ci<? (string-ints 0) (string-ints 255)))))

;;
;; string<=?
;;

(with-test-prefix "string<=?"

  (pass-if "same as char<=?"
    (eq? (char<=? (integer->char 0) (integer->char 255))
	 (string<=? (string-ints 0) (string-ints 255)))))

;;
;; string-ci<=?
;;

(with-test-prefix "string-ci<=?"

  (pass-if "same as char-ci<=?"
    (eq? (char-ci<=? (integer->char 0) (integer->char 255))
	 (string-ci<=? (string-ints 0) (string-ints 255)))))

;;
;; string>?
;;

(with-test-prefix "string>?"

  (pass-if "same as char>?"
    (eq? (char>? (integer->char 0) (integer->char 255))
	 (string>? (string-ints 0) (string-ints 255)))))

;;
;; string-ci>?
;;

(with-test-prefix "string-ci>?"

  (pass-if "same as char-ci>?"
    (eq? (char-ci>? (integer->char 0) (integer->char 255))
	 (string-ci>? (string-ints 0) (string-ints 255)))))

;;
;; string>=?
;;

(with-test-prefix "string>=?"

  (pass-if "same as char>=?"
    (eq? (char>=? (integer->char 0) (integer->char 255))
	 (string>=? (string-ints 0) (string-ints 255)))))

;;
;; string-ci>=?
;;

(with-test-prefix "string-ci>=?"

  (pass-if "same as char-ci>=?"
    (eq? (char-ci>=? (integer->char 0) (integer->char 255))
	 (string-ci>=? (string-ints 0) (string-ints 255)))))

;;
;; string-ref
;;

(with-test-prefix "string-ref"

  (pass-if-exception "empty string"
    exception:out-of-range
    (string-ref "" 0))

  (pass-if-exception "empty string and non-zero index"
    exception:out-of-range
    (string-ref "" 123))

  (pass-if-exception "out of range"
    exception:out-of-range
    (string-ref "hello" 123))

  (pass-if-exception "negative index"
    exception:out-of-range
    (string-ref "hello" -1))

  (pass-if "regular string"
    (char=? (string-ref "GNU Guile" 4) #\G)))

;;
;; string-set!
;;

(with-test-prefix "string-set!"

  (pass-if-exception "empty string"
    exception:out-of-range
    (string-set! (string-copy "") 0 #\x))

  (pass-if-exception "empty string and non-zero index"
    exception:out-of-range
    (string-set! (string-copy "") 123 #\x))

  (pass-if-exception "out of range"
    exception:out-of-range
    (string-set! (string-copy "hello") 123 #\x))

  (pass-if-exception "negative index"
    exception:out-of-range
    (string-set! (string-copy "hello") -1 #\x))

  (pass-if-exception "read-only string"
    exception:read-only-string
    (string-set! (substring/read-only "abc" 0) 1 #\space))

  (pass-if "regular string"
    (let ((s (string-copy "GNU guile")))
      (string-set! s 4 #\G)
      (char=? (string-ref s 4) #\G))))


(with-test-prefix "string-split"

  ;; in guile 1.6.7 and earlier, character >=128 wasn't matched in the string
  (pass-if "char 255"
    (equal? '("a" "b")
	    (string-split (string #\a (integer->char 255) #\b)
			  (integer->char 255)))))

(with-test-prefix "substring-move!"

  (pass-if-exception "substring-move! checks start and end correctly"
    exception:out-of-range
    (substring-move! "sample" 3 0 "test" 3)))

(with-test-prefix "substring/shared"

  (pass-if "modify indirectly"
    (let ((str (string-copy "foofoofoo")))
      (string-upcase! (substring/shared str 3 6))
      (string=? str "fooFOOfoo")))

  (pass-if "modify cow indirectly"
    (let* ((str1 (string-copy "foofoofoo"))
	   (str2 (string-copy str1)))
      (string-upcase! (substring/shared str2 3 6))
      (and (string=? str1 "foofoofoo")
	   (string=? str2 "fooFOOfoo"))))

  (pass-if "modify double indirectly"
    (let* ((str1 (string-copy "foofoofoo"))
	   (str2 (substring/shared str1 2 7)))
      (string-upcase! (substring/shared str2 1 4))
      (string=? str1 "fooFOOfoo")))

  (pass-if "modify cow double indirectly"
    (let* ((str1 "foofoofoo")
	   (str2 (substring str1 2 7)))
      (string-upcase! (substring/shared str2 1 4))
      (and (string=? str1 "foofoofoo")
	   (string=? str2 "oFOOf")))))