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;;; xdisp-tests.el --- tests for xdisp.c functions -*- lexical-binding: t -*-
;; Copyright (C) 2020-2021 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)
(defmacro xdisp-tests--in-minibuffer (&rest body)
(declare (debug t) (indent 0))
`(catch 'result
(minibuffer-with-setup-hook
(lambda ()
(let ((redisplay-skip-initial-frame nil)
(executing-kbd-macro nil)) ;Don't skip redisplay
(throw 'result (progn . ,body))))
(let ((executing-kbd-macro t)) ;Force real minibuffer in `read-string'.
(read-string "toto: ")))))
(ert-deftest xdisp-tests--minibuffer-resizing () ;; bug#43519
(should
(equal
t
(xdisp-tests--in-minibuffer
(insert "hello")
(let ((ol (make-overlay (point) (point)))
(max-mini-window-height 1)
(text "askdjfhaklsjdfhlkasjdfhklasdhflkasdhflkajsdhflkashdfkljahsdlfkjahsdlfkjhasldkfhalskdjfhalskdfhlaksdhfklasdhflkasdhflkasdhflkajsdhklajsdgh"))
;; (save-excursion (insert text))
;; (sit-for 2)
;; (delete-region (point) (point-max))
(put-text-property 0 1 'cursor t text)
(overlay-put ol 'after-string text)
(redisplay 'force)
;; Make sure we do the see "hello" text.
(prog1 (equal (window-start) (point-min))
;; (list (window-start) (window-end) (window-width))
(delete-overlay ol)))))))
(ert-deftest xdisp-tests--minibuffer-scroll () ;; bug#44070
(let ((posns
(xdisp-tests--in-minibuffer
(let ((max-mini-window-height 4))
(dotimes (_ 80) (insert "\nhello"))
(goto-char (point-min))
(redisplay 'force)
(goto-char (point-max))
;; A simple edit like removing the last `o' shouldn't cause
;; the rest of the minibuffer's text to move.
(list
(progn (redisplay 'force) (window-start))
(progn (delete-char -1)
(redisplay 'force) (window-start))
(progn (goto-char (point-min)) (redisplay 'force)
(goto-char (point-max)) (redisplay 'force)
(window-start)))))))
(should (equal (nth 0 posns) (nth 1 posns)))
(should (equal (nth 1 posns) (nth 2 posns)))))
(ert-deftest xdisp-tests--window-text-pixel-size () ;; bug#45748
(with-temp-buffer
(insert "xxx")
(switch-to-buffer (current-buffer))
(let* ((char-width (frame-char-width))
(size (window-text-pixel-size nil t t))
(width-in-chars (/ (car size) char-width)))
(should (equal width-in-chars 3)))))
(ert-deftest xdisp-tests--window-text-pixel-size-leading-space () ;; bug#45748
(with-temp-buffer
(insert " xx")
(switch-to-buffer (current-buffer))
(let* ((char-width (frame-char-width))
(size (window-text-pixel-size nil t t))
(width-in-chars (/ (car size) char-width)))
(should (equal width-in-chars 3)))))
(ert-deftest xdisp-tests--window-text-pixel-size-trailing-space () ;; bug#45748
(with-temp-buffer
(insert "xx ")
(switch-to-buffer (current-buffer))
(let* ((char-width (frame-char-width))
(size (window-text-pixel-size nil t t))
(width-in-chars (/ (car size) char-width)))
(should (equal width-in-chars 3)))))
;;; xdisp-tests.el ends here
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