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;;; jit-lock-tests.el --- tests for jit-lock
;; Copyright (C) 2016-2020 Free Software Foundation, Inc.
;; Author: Dmitry Gutov <dgutov@yandex.ru>
;; 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/>.
;;; Commentary:
;;; Code:
(require 'jit-lock)
(require 'ert-x)
(defun jit-lock-tests--setup-buffer ()
(setq font-lock-defaults '(nil t))
(let (noninteractive)
(font-lock-mode)))
(ert-deftest jit-lock-fontify-now-fontifies-a-new-buffer ()
(ert-with-test-buffer (:name "xxx")
(jit-lock-tests--setup-buffer)
(insert "xyz")
(jit-lock-fontify-now (point-min) (point-max))
(should-not (text-property-not-all (point-min) (point-max) 'fontified t))))
(ert-deftest jit-lock-fontify-now-mends-the-gaps ()
(ert-with-test-buffer (:name "xxx")
(jit-lock-tests--setup-buffer)
(insert "aaabbbcccddd")
(with-silent-modifications
(put-text-property 1 4 'fontified t)
(put-text-property 7 10 'fontified t))
(jit-lock-fontify-now (point-min) (point-max))
(should-not (text-property-not-all (point-min) (point-max) 'fontified t))))
(ert-deftest jit-lock-fontify-now-does-not-refontify-unnecessarily ()
(ert-with-test-buffer (:name "xxx")
(setq font-lock-defaults
(list '(((lambda () (error "Don't call me")))) t))
(let (noninteractive)
(font-lock-mode))
(insert "aaa")
(with-silent-modifications
(put-text-property (point-min) (point-max) 'fontified t))
(jit-lock-fontify-now (point-min) (point-max))))
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