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;;; fill-test.el --- ERT tests for fill.el -*- lexical-binding: t -*-
;; Copyright (C) 2017-2021 Free Software Foundation, Inc.
;; Author: Marcin Borkowski <mbork@mbork.pl>
;; Keywords: text, wp
;; 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:
;; This package defines tests for the filling feature, specifically
;; the `fill-polish-nobreak-p' function.
;;; Code:
(require 'ert)
(ert-deftest fill-test-no-fill-polish-nobreak-p nil
"Tests of the `fill-polish-nobreak-p' function."
(with-temp-buffer
(insert "Abc d efg (h ijk).")
(setq fill-column 8)
(setq-local fill-nobreak-predicate '())
(fill-paragraph)
(should (string= (buffer-string) "Abc d\nefg (h\nijk).")))
(with-temp-buffer
(insert "Abc d efg (h ijk).")
(setq fill-column 8)
(setq-local fill-nobreak-predicate '(fill-polish-nobreak-p))
(fill-paragraph)
(should (string= (buffer-string) "Abc\nd efg\n(h ijk)."))))
(ert-deftest fill-test-unbreakable-paragraph ()
(with-temp-buffer
(let ((string "aaa = baaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"))
(insert string)
(goto-char (point-min))
(search-forward "b")
(let* ((pos (point))
(beg (line-beginning-position))
(end (line-end-position))
(fill-prefix (make-string (- pos beg) ?\s))
;; `fill-column' is too small to accomodate the current line
(fill-column (- end beg 10)))
(fill-region-as-paragraph beg end nil nil pos))
(should (equal (buffer-string) string)))))
(ert-deftest fill-test-breakable-paragraph ()
(with-temp-buffer
(let ((string "aaa = baaaaaaaa aaaaaaaaaa aaaaaaaaaa\n"))
(insert string)
(goto-char (point-min))
(search-forward "b")
(let* ((pos (point))
(beg (line-beginning-position))
(end (line-end-position))
(fill-prefix (make-string (- pos beg) ?\s))
;; `fill-column' is too small to accomodate the current line
(fill-column (- end beg 10)))
(fill-region-as-paragraph beg end nil nil pos))
(should (equal
(buffer-string)
"aaa = baaaaaaaa aaaaaaaaaa\n aaaaaaaaaa\n")))))
(provide 'fill-tests)
;;; fill-tests.el ends here
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