;; -*- scheme -*-
;;; ----------------------------------------------------------------------
;;;    unit test
;;;    Copyright (C) 2003, 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 of the License, 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 program; if not, write to the Free Software
;;;    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
;;; ----------------------------------------------------------------------
(define-module (test-suite test-string-utils)
  #:use-module (test-suite lib)
  #:use-module (texinfo string-utils))


;; **********************************************************************
;; Test for expand-tabs
;; **********************************************************************
(with-test-prefix "test-beginning-expansion"
  (pass-if (equal? "        Hello"
                   (expand-tabs "\tHello")))
  (pass-if (equal? "                Hello"
                   (expand-tabs "\t\tHello"))))

(with-test-prefix "test-ending-expansion"
  (pass-if (equal? "Hello        "
                   (expand-tabs "Hello\t")))
  (pass-if (equal? "Hello                "
                   (expand-tabs "Hello\t\t"))))

(with-test-prefix "test-middle-expansion"
  (pass-if (equal? "Hello        there" (expand-tabs "Hello\tthere")))
  (pass-if (equal? "Hello                there" (expand-tabs "Hello\t\tthere"))))

(with-test-prefix "test-alternate-tab-size"
  (pass-if (equal? "Hello   there"
                   (expand-tabs "Hello\tthere" 3)))
  (pass-if (equal? "Hello    there"
                   (expand-tabs "Hello\tthere" 4)))
  (pass-if (equal? "Hello     there"
                   (expand-tabs "Hello\tthere" 5))))
  
;; **********************************************************************
;; tests for escape-special-chars
;; **********************************************************************
(with-test-prefix "test-single-escape-char"
  (pass-if (equal? "HeElElo"
                   (escape-special-chars "Hello" #\l #\E))))

(with-test-prefix "test-multiple-escape-chars"
  (pass-if (equal? "HEeElElo"
                   (escape-special-chars "Hello" "el" #\E))))


;; **********************************************************************
;; tests for collapsing-multiple-chars
;; **********************************************************************
(with-test-prefix "collapse-repeated-chars"
  (define test-string
    "H e  l   l    o     t      h       e        r         e")

  (with-test-prefix "test-basic-collapse"
    (pass-if (equal? "H e l l o t h e r e"
                     (collapse-repeated-chars test-string))))

  (with-test-prefix "test-choose-other-char"
    (pass-if (equal? "H-e-l-l-o-t-h-e-r-e"
                     (collapse-repeated-chars (transform-string test-string #\space #\-) 
                                              #\-))))

  (with-test-prefix "test-choose-maximum-repeats"
    (pass-if (equal? "H e  l  l  o  t  h  e  r  e"
                     (collapse-repeated-chars test-string #\space 2)))
    (pass-if (equal? "H e  l   l   o   t   h   e   r   e"
                     (collapse-repeated-chars test-string #\space 3)))))

;; **********************************************************************
;; Test of the object itself...
;; **********************************************************************
(with-test-prefix "text wrapping"
  (define test-string "
The last language environment specified with 
`set-language-environment'.   This variable should be 
set only with M-x customize, which is equivalent
to using the function `set-language-environment'.
")

  (with-test-prefix "runs-without-exception"
    (pass-if (->bool (fill-string test-string)))
    (pass-if (->bool (fill-string test-string #:line-width 20)))
    (pass-if (->bool (fill-string test-string #:initial-indent " * " #:tab-width 3))))
                
  (with-test-prefix "test-fill-equivalent-to-joined-lines"
    (pass-if (equal? (fill-string test-string)
                     (string-join (string->wrapped-lines test-string) "\n" 'infix))))

  (with-test-prefix "test-no-collapse-ws"
    (pass-if (equal? (fill-string test-string #:collapse-whitespace? #f)
                     "The last language environment specified with  `set-language-environment'.   This
variable should be  set only with M-x customize, which is equivalent to using
the function `set-language-environment'.")))

  (with-test-prefix "test-no-word-break"
    (pass-if (equal? "thisisalongword
blah
blah"
                     (fill-string "thisisalongword blah blah"
                                  #:line-width 8
                                  #:break-long-words? #f)))))