;;; os-tests.el --- test support for OS interaction

;; Copyright (C) 2004 Free Software Foundation

;; Author: Stephen J. Turnbull <stephen@xemacs.org>
;; Maintainer: Stephen J. Turnbull <stephen@xemacs.org>
;; Created: 2004 October 28
;; Keywords: tests, process support

;; This file is part of XEmacs.

;; XEmacs 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 3 of the License, or (at your
;; option) any later version.

;; XEmacs 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 XEmacs.  If not, see <http://www.gnu.org/licenses/>.

;;; Synched up with: Not in FSF.

;;; Commentary:

;; Test OS support.  Processes, environment variables, etc.
;; See test-harness.el for instructions on how to run these tests.

;; call-process-region bug reported by Katsumi Yamaoka on 2004-10-26
;; in <b9yvfcyuscf.fsf@jpl.org>, who suggested the basic test scheme
;; in <b9yoeipvwn0.fsf@jpl.org>.

;; tac works by lines, unfortunately
;; #### The contortions around `executable-find' gag me, but I don't have time
;; to deal today.  If we have `executable-find', we should use its value!
(let* ((original-string "a\nb\nc\nd\n")
       ;; `executable-find' is in a package and may be unavailable.
       (tac-cases (if (and (fboundp 'executable-find) (executable-find "tac"))
		      '((1 . "c\nb\na\nd\n")
			(3 . "a\nc\nb\nd\n")
			(5 . "a\nc\nb\nd\n")
			(7 . "a\nc\nb\nd\n")
			(9 . "a\nd\nc\nb\n"))
		    nil))
       (cat-cases (if (and (fboundp 'executable-find) (executable-find "cat"))
		      '((1 . "b\nc\na\nd\n")
			(3 . "a\nb\nc\nd\n")
			(5 . "a\nb\nc\nd\n")
			(7 . "a\nb\nc\nd\n")
			(9 . "a\nd\nb\nc\n"))
		    nil))
       cases case)
  (with-temp-buffer
    (Skip-Test-Unless tac-cases
	 "tac executable not found"
	 "Tests of call-process-region with region deleted after inserting
tac process output."
      (setq cases tac-cases)
      (while cases
        (setq case (car cases)
	      cases (cdr cases))
	(flet ((do-test (pos result)
		 (erase-buffer)
		 (insert original-string)
		 (goto-char pos)
		 (call-process-region 3 7 "tac" t t)
		 (goto-char (point-min))
		 (Assert (looking-at result))))
	  (do-test (car case) (cdr case)))))
    ;; if you're in that much of a hurry you can blow cat off
    ;; if you've done tac, but I'm not going to bother
    (Skip-Test-Unless cat-cases
	 "cat executable not found"
	 "Tests of call-process-region with region deleted after inserting
cat process output."
      (setq cases cat-cases)
      (while cases
        (setq case (car cases)
	      cases (cdr cases))
	(flet ((do-test (pos result)
		 (erase-buffer)
		 (insert original-string)
		 (goto-char pos)
		 (call-process-region 3 7 "cat" t t)
		 (goto-char (point-min))
		 (Assert (looking-at result))))
	  (do-test (car case) (cdr case)))))))

;;; end of os-tests.el