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60 lines
2.3 KiB
EmacsLisp
60 lines
2.3 KiB
EmacsLisp
;;; marker-tests.el --- tests for marker.c functions -*- lexical-binding: t -*-
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;; Copyright (C) 2016-2025 Free Software Foundation, Inc.
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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;;; Code:
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(require 'ert)
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;; The following three tests assert that Emacs survives operations
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;; copying a marker whose character position differs from its byte
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;; position into a buffer whose character size equals its byte size
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;; (Bug#24368).
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(ert-deftest marker-set-window-start-from-other-buffer ()
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"`set-window-start' from other buffer's marker."
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(let ((text-quoting-style 'curve))
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(describe-function 'describe-function))
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(let* ((help (get-buffer "*Help*"))
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(marker (with-current-buffer help
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(copy-marker (point-max)))))
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(should (set-window-start (selected-window) marker))))
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(ert-deftest marker-set-window-point-from-other-buffer ()
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"`set-window-point' from another buffer's marker."
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(let ((text-quoting-style 'curve))
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(describe-function 'describe-function))
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(let* ((help (get-buffer "*Help*"))
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(marker (with-current-buffer help
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(copy-marker (point-max)))))
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(with-selected-window (get-buffer-window help)
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(should (set-window-point (get-buffer-window "*scratch*") marker)))))
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(ert-deftest marker-goto-char-from-other-buffer ()
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"`goto-char' from another buffer's marker."
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(let ((text-quoting-style 'curve))
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(describe-function 'describe-function))
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(let ((marker-1 (make-marker))
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(marker-2 (make-marker)))
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(describe-function 'describe-function)
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(with-current-buffer "*Help*"
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(set-marker marker-1 (point-max)))
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(set-marker marker-2 marker-1)
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(should (goto-char marker-2))))
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;;; marker-tests.el ends here
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