;;;; load.test --- test LOAD and path searching functions  -*- scheme -*-
;;;; Jim Blandy <jimb@red-bean.com> --- September 1999
;;;;
;;;; 	Copyright (C) 1999, 2001 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., 59 Temple Place, Suite 330,
;;;; Boston, MA 02111-1307 USA

(define-module (test-suite test-load)
  :use-module (test-suite lib)
  :use-module (test-suite guile-test))

(define temp-dir (data-file-name "load-test.dir"))

(define (create-tree parent tree)
  (let loop ((parent parent)
	     (tree tree))
    (if (pair? tree)
	(let ((elt (car tree)))
	  (cond

	   ;; A string means to create an empty file with that name.
	   ((string? elt)
	    (close-port (open-file (string-append parent "/" elt) "w")))

	   ;; A list means to create a directory, and then create files
	   ;; within it.
	   ((pair? elt)
	    (let ((dirname (string-append parent "/" (car elt))))
	      (mkdir dirname)
	      (loop dirname (cdr elt))))

	   (else
	    (error "create-tree: bad tree structure")))

	  (loop parent (cdr tree))))))

(define (delete-tree tree)
  (cond
   ((file-is-directory? tree)
    (let ((dir (opendir tree)))
      (let loop ()
	(let ((entry (readdir dir)))
	  (cond
	   ((member entry '("." ".."))
	    (loop))
	   ((not (eof-object? entry))
	    (let ((name (string-append tree "/" entry)))
	      (delete-tree name)
	      (loop))))))
      (closedir dir)
      (rmdir tree)))
   ((file-exists? tree)
    (delete-file tree))
   (else
    (error "delete-tree: can't delete " tree))))

(define (try-search-with-extensions path input extensions expected)
  (let ((test-name (call-with-output-string
		    (lambda (port)
		      (display "search-path for " port)
		      (write input port)
		      (if (pair? extensions)
			  (begin
			    (display " with extensions " port)
			    (write extensions port)))
		      (display " yields " port)
		      (write expected port)))))
    (let ((result (search-path path input extensions)))
      (pass-if test-name
	       (equal? (if (string? expected)
			   (string-append temp-dir "/" expected)
			   expected)
		       result)))))

(define (try-search path input expected)
  (try-search-with-extensions path input '() expected))

;; Create a bunch of files for use in testing.
(mkdir temp-dir)
(create-tree temp-dir
	     '(("dir1" "foo.scm" "bar.scm" "ugly.scm.scm"
		("subdir1"))
	       ("dir2" "foo.scm" "baz.scm" "baz.ss" "ugly.scm.ss")
	       ("dir3" "ugly.scm" "ugly.ss.scm")))

;; Try some searches without extensions.
(define path (list
	      (string-append temp-dir "/dir1")
	      (string-append temp-dir "/dir2")
	      (string-append temp-dir "/dir3")))

(try-search path "foo.scm"  "dir1/foo.scm")
(try-search path "bar.scm"  "dir1/bar.scm")
(try-search path "baz.scm"  "dir2/baz.scm")
(try-search path "baz.ss"   "dir2/baz.ss")
(try-search path "ugly.scm" "dir3/ugly.scm")
(try-search path "subdir1"  #f)

(define extensions '(".ss" ".scm" ""))
(try-search-with-extensions path "foo" 	    extensions "dir1/foo.scm")
(try-search-with-extensions path "bar" 	    extensions "dir1/bar.scm")
(try-search-with-extensions path "baz" 	    extensions "dir2/baz.ss")
(try-search-with-extensions path "ugly.scm" extensions "dir3/ugly.scm")
(try-search-with-extensions path "ugly.ss"  extensions #f)

(if (defined? '%nil)
    ;; Check that search-path accepts Elisp nil-terminated lists for
    ;; PATH and EXTENSIONS.
    (with-test-prefix "elisp-nil"
      (set-cdr! (last-pair path) %nil)
      (set-cdr! (last-pair extensions) %nil)
      (try-search-with-extensions path "ugly.scm" extensions "dir3/ugly.scm")
      (try-search-with-extensions path "ugly.ss"  extensions #f)))
      
(delete-tree temp-dir)