code.delx.au - gnu-emacs/blob - test/automated/buffer-tests.el

   1 ;;; buffer-tests.el --- tests for buffer.c functions -*- lexical-binding: t -*-
   2
   3 ;; Copyright (C) 2015-2016 Free Software Foundation, Inc.
   4
   5 ;; This file is part of GNU Emacs.
   6
   7 ;; GNU Emacs is free software: you can redistribute it and/or modify
   8 ;; it under the terms of the GNU General Public License as published by
   9 ;; the Free Software Foundation, either version 3 of the License, or
  10 ;; (at your option) any later version.
  11
  12 ;; GNU Emacs is distributed in the hope that it will be useful,
  13 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 ;; GNU General Public License for more details.
  16
  17 ;; You should have received a copy of the GNU General Public License
  18 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  19
  20 ;;; Code:
  21
  22 (require 'ert)
  23
  24 (ert-deftest overlay-modification-hooks-message-other-buf ()
  25   "Test for bug#21824.
  26 After a modification-hook has been run and there is an overlay in
  27 the *Messages* buffer, the message coalescing [2 times] wrongly
  28 runs the modification-hook of the overlay in the 1st buffer, but
  29 with parameters from the *Messages* buffer modification."
  30   (let ((buf nil)
  31         (msg-ov nil))
  32     (with-temp-buffer
  33       (insert "123")
  34       (overlay-put (make-overlay 1 3)
  35                    'modification-hooks
  36                    (list (lambda (&rest _)
  37                            (setq buf (current-buffer)))))
  38       (goto-char 2)
  39       (insert "x")
  40       (unwind-protect
  41           (progn
  42             (setq msg-ov (make-overlay 1 1 (get-buffer-create "*Messages*")))
  43             (message "a message")
  44             (message "a message")
  45             (should (eq buf (current-buffer))))
  46         (when msg-ov (delete-overlay msg-ov))))))
  47
  48 ;;; buffer-tests.el ends here