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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--visible-buffer (&rest body)
(declare (debug t) (indent 0))
`(progn
(switch-to-buffer (symbol-name (ert-test-name (ert-running-test))))
(progn ,@body)
(let (kill-buffer-query-functions)
(kill-buffer (symbol-name (ert-test-name (ert-running-test)))))))
(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)))))
(ert-deftest xdisp-tests--find-directional-overrides-case-1 ()
(with-temp-buffer
(insert "\
int main() {
bool isAdmin = false;
/* }if (isAdmin) begin admins only */
printf(\"You are an admin.\\n\");
/* end admins only { */
return 0;
}")
(goto-char (point-min))
(should (eq (bidi-find-overridden-directionality (point-min) (point-max)
nil)
46))))
(ert-deftest xdisp-tests--find-directional-overrides-case-2 ()
(with-temp-buffer
(insert "\
#define is_restricted_user(user) \\
!strcmp (user, \"root\") ? 0 : \\
!strcmp (user, \"admin\") ? 0 : \\
!strcmp (user, \"superuser? 0 : 1 \")
int main () {
printf (\"root: %d\\n\", is_restricted_user (\"root\"));
printf (\"admin: %d\\n\", is_restricted_user (\"admin\"));
printf (\"superuser: %d\\n\", is_restricted_user (\"superuser\"));
printf (\"luser: %d\\n\", is_restricted_user (\"luser\"));
printf (\"nobody: %d\\n\", is_restricted_user (\"nobody\"));
}")
(goto-char (point-min))
(should (eq (bidi-find-overridden-directionality (point-min) (point-max)
nil)
138))))
(ert-deftest xdisp-tests--find-directional-overrides-case-3 ()
(with-temp-buffer
(insert "\
#define is_restricted_user(user) \\
!strcmp (user, \"root\") ? 0 : \\
!strcmp (user, \"admin\") ? 0 : \\
!strcmp (user, \"superuser? '#' : '!' \")
int main () {
printf (\"root: %d\\n\", is_restricted_user (\"root\"));
printf (\"admin: %d\\n\", is_restricted_user (\"admin\"));
printf (\"superuser: %d\\n\", is_restricted_user (\"superuser\"));
printf (\"luser: %d\\n\", is_restricted_user (\"luser\"));
printf (\"nobody: %d\\n\", is_restricted_user (\"nobody\"));
}")
(goto-char (point-min))
(should (eq (bidi-find-overridden-directionality (point-min) (point-max)
nil)
138))))
(ert-deftest test-get-display-property ()
(with-temp-buffer
(insert (propertize "foo" 'face 'bold 'display '(height 2.0)))
(should (equal (get-display-property 2 'height) 2.0)))
(with-temp-buffer
(insert (propertize "foo" 'face 'bold 'display '((height 2.0)
(space-width 2.0))))
(should (equal (get-display-property 2 'height) 2.0))
(should (equal (get-display-property 2 'space-width) 2.0)))
(with-temp-buffer
(insert (propertize "foo bar" 'face 'bold
'display '[(height 2.0)
(space-width 20)]))
(should (equal (get-display-property 2 'height) 2.0))
(should (equal (get-display-property 2 'space-width) 20))))
(ert-deftest xdisp-tests--reconnoiter-image-height ()
"C-v on image extending beyond window should not signal
end-of-buffer."
(skip-unless (not noninteractive))
(skip-unless (> (window-pixel-height) 300))
(xdisp-tests--visible-buffer
(dotimes (_ (/ (- (window-pixel-height) 100) (line-pixel-height)))
(insert "line" "\n"))
(insert-image (create-image (expand-file-name
"test/data/image/blank-100x200.png"
source-directory)))
(insert "\n")
(redisplay)
(goto-char (point-min))
(scroll-up)
(redisplay)))
(ert-deftest xdisp-tests--scroll-down-leaves-cursor-behind ()
"When first line contains accented, and therefore taller
character, e.g., Óscar, scrolling down (moving window-start up)
has resulted in a no-op."
(xdisp-tests--visible-buffer
(insert "Óscar" "\n")
(dotimes (_ (/ (1+ (window-pixel-height)) (line-pixel-height)))
(insert "line" "\n"))
(goto-char (point-max))
(redisplay)
(scroll-down)
(redisplay)
(should (= (window-start) 1))))
(ert-deftest xdisp-tests--window-text-pixel-size-single-sline ()
"Verify `window-text-pixel-size' handles one screen line spanned."
(xdisp-tests--visible-buffer
(save-excursion
(insert "xxxx"))
(should (= (* 2 (frame-char-width))
(car (window-text-pixel-size
nil (1+ (point-min)) (1- (point-max))))))))
(ert-deftest xdisp-tests--window-text-pixel-size-display-property ()
"Verify `window-text-pixel-size' returns dimensions including
width of display property."
(xdisp-tests--visible-buffer
(let ((disp-string "ornery"))
(save-excursion
(insert "xxxx"))
(should
(= (+ (1- (length disp-string))
(car (window-text-pixel-size
nil (line-beginning-position) (line-end-position))))
(progn
(put-text-property (1- (line-end-position))
(line-end-position)
'display disp-string)
(car (window-text-pixel-size
nil (line-beginning-position) (line-end-position)))))))))
;;; xdisp-tests.el ends here
|