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;;; whitespace-tests.el --- Test suite for whitespace -*- lexical-binding: t -*-
;; Copyright (C) 2016-2019 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)
(require 'whitespace)
(defun whitespace-tests--cleanup-string (string)
(with-temp-buffer
(insert string)
(whitespace-cleanup)
(buffer-string)))
(ert-deftest whitespace-cleanup-eob ()
(let ((whitespace-style '(empty)))
(should (equal (whitespace-tests--cleanup-string "a\n")
"a\n"))
(should (equal (whitespace-tests--cleanup-string "a\n\n")
"a\n"))
(should (equal (whitespace-tests--cleanup-string "a\n\t\n")
"a\n"))
(should (equal (whitespace-tests--cleanup-string "a\n\t \n")
"a\n"))
(should (equal (whitespace-tests--cleanup-string "a\n\t \n\n")
"a\n"))
(should (equal (whitespace-tests--cleanup-string "\n\t\n")
""))
;; Whitespace at end of non-empty line is not covered by the
;; `empty' style.
(should (equal (whitespace-tests--cleanup-string "a \n\t \n\n")
"a \n"))))
;; We cannot call whitespace-mode because it will do nothing in batch
;; mode. So we call its innards instead.
(defun whitespace-tests-whitespace-mode-on ()
"Turn whitespace-mode on even in batch mode."
(whitespace-turn-on)
(whitespace-action-when-on)
(setq whitespace-mode t))
(ert-deftest whitespace-tests-display-tables ()
"Test whitespace stores and restores the buffer display table - bug26892."
(with-temp-buffer
(whitespace-mode -1) ; turn off in case global ws mode is active
(let ((whitespace-style '(space-mark tab-mark newline-mark))
(whitespace-display-mappings '((space-mark 32 [183] [46])
(space-mark 160 [164] [95])
(newline-mark 10 [36 10])
(tab-mark 9 [187 9] [92 9])))
(buffer-display-table nil))
;test the display table actually changes
(should-not (equal nil
(progn (whitespace-tests-whitespace-mode-on)
buffer-display-table)))
;test the display table restores correctly
(should (equal nil
(progn (whitespace-turn-off)
buffer-display-table)))
;test the stored display table is preserved
(should (equal nil
(progn (whitespace-tests-whitespace-mode-on)
(whitespace-tests-whitespace-mode-on)
(whitespace-turn-off)
buffer-display-table))))))
(provide 'whitespace-tests)
;;; whitespace-tests.el ends here
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