test/lisp/whitespace-tests.el

   1 ;;; whitespace-tests.el --- Test suite for whitespace -*- lexical-binding: t -*-
   2
   3 ;; Copyright (C) 2016-2018 Free Software Foundation, Inc.
   4
   5 ;; This file is part of GNU Emacs.
   6
   7 ;; GNU Emacs is free software: you can redistribute it and/or modify
   8 ;; it under the terms of the GNU General Public License as published by
   9 ;; the Free Software Foundation, either version 3 of the License, or
  10 ;; (at your option) any later version.
  11
  12 ;; GNU Emacs is distributed in the hope that it will be useful,
  13 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 ;; GNU General Public License for more details.
  16
  17 ;; You should have received a copy of the GNU General Public License
  18 ;; along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.
  19
  20 ;;; Code:
  21
  22 (require 'ert)
  23 (require 'whitespace)
  24
  25 (defun whitespace-tests--cleanup-string (string)
  26   (with-temp-buffer
  27     (insert string)
  28     (whitespace-cleanup)
  29     (buffer-string)))
  30
  31 (ert-deftest whitespace-cleanup-eob ()
  32   (let ((whitespace-style '(empty)))
  33     (should (equal (whitespace-tests--cleanup-string "a\n")
  34                    "a\n"))
  35     (should (equal (whitespace-tests--cleanup-string "a\n\n")
  36                    "a\n"))
  37     (should (equal (whitespace-tests--cleanup-string "a\n\t\n")
  38                    "a\n"))
  39     (should (equal (whitespace-tests--cleanup-string "a\n\t \n")
  40                    "a\n"))
  41     (should (equal (whitespace-tests--cleanup-string "a\n\t \n\n")
  42                    "a\n"))
  43     (should (equal (whitespace-tests--cleanup-string "\n\t\n")
  44                    ""))
  45     ;; Whitespace at end of non-empty line is not covered by the
  46     ;; `empty' style.
  47     (should (equal (whitespace-tests--cleanup-string "a  \n\t \n\n")
  48                    "a  \n"))))
  49
  50
  51 ;; We cannot call whitespace-mode because it will do nothing in batch
  52 ;; mode.  So we call its innards instead.
  53 (defun whitespace-tests-whitespace-mode-on ()
  54   "Turn whitespace-mode on even in batch mode."
  55   (whitespace-turn-on)
  56   (whitespace-action-when-on)
  57   (setq whitespace-mode t))
  58
  59 (ert-deftest whitespace-tests-display-tables ()
  60   "Test whitespace stores and restores the buffer display table - bug26892."
  61   (with-temp-buffer
  62     (whitespace-mode -1) ; turn off in case global ws mode is active
  63     (let ((whitespace-style '(space-mark tab-mark newline-mark))
  64           (whitespace-display-mappings '((space-mark   32 [183] [46])
  65                                          (space-mark  160 [164] [95])
  66                                          (newline-mark 10 [36 10])
  67                                          (tab-mark      9 [187 9] [92 9])))
  68           (buffer-display-table nil))
  69       ;test the display table actually changes
  70       (should-not (equal nil
  71                          (progn (whitespace-tests-whitespace-mode-on)
  72                                 buffer-display-table)))
  73       ;test the display table restores correctly
  74       (should (equal nil
  75                      (progn (whitespace-turn-off)
  76                             buffer-display-table)))
  77       ;test the stored display table is preserved
  78       (should (equal nil
  79                      (progn (whitespace-tests-whitespace-mode-on)
  80                             (whitespace-tests-whitespace-mode-on)
  81                             (whitespace-turn-off)
  82                             buffer-display-table))))))
  83
  84 (provide 'whitespace-tests)
  85
  86 ;;; whitespace-tests.el ends here