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;;; marker-tests.el --- tests for marker.c functions -*- lexical-binding: t -*-
;; Copyright (C) 2016-2020 Free Software Foundation, Inc.
;; This file is part of GNU Emacs.
;; GNU Emacs 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.
;; GNU Emacs 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 GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
;;; Code:
(require 'ert)
;; The following three tests assert that Emacs survives operations
;; copying a marker whose character position differs from its byte
;; position into a buffer whose character size equals its byte size
;; (Bug#24368).
(ert-deftest marker-set-window-start-from-other-buffer ()
"`set-window-start' from other buffer's marker."
(let ((text-quoting-style 'curve))
(describe-function 'describe-function))
(let* ((help (get-buffer "*Help*"))
(marker (with-current-buffer help
(copy-marker (point-max)))))
(should (set-window-start (selected-window) marker))))
(ert-deftest marker-set-window-point-from-other-buffer ()
"`set-window-point' from another buffer's marker."
(let ((text-quoting-style 'curve))
(describe-function 'describe-function))
(let* ((help (get-buffer "*Help*"))
(marker (with-current-buffer help
(copy-marker (point-max)))))
(with-selected-window (get-buffer-window help)
(should (set-window-point (get-buffer-window "*scratch*") marker)))))
(ert-deftest marker-goto-char-from-other-buffer ()
"`goto-char' from another buffer's marker."
(let ((text-quoting-style 'curve))
(describe-function 'describe-function))
(let ((marker-1 (make-marker))
(marker-2 (make-marker)))
(describe-function 'describe-function)
(with-current-buffer "*Help*"
(set-marker marker-1 (point-max)))
(set-marker marker-2 marker-1)
(should (goto-char marker-2))))
;;; marker-tests.el ends here.
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