all messages for Emacs-related lists mirrored at yhetil.org
 help / color / mirror / code / Atom feed
blob 12f6cb99a235eb68863d6e7256a875d558ebf4bb 18061 bytes (raw)
name: test/lisp/whitespace-tests.el 	 # note: path name is non-authoritative(*)

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
 
;;; whitespace-tests.el --- Test suite for whitespace -*- lexical-binding: t -*-

;; Copyright (C) 2016-2022 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 'ert-x)
(require 'faceup)
(require 'whitespace)

(defmacro whitespace-tests--with-test-buffer (style &rest body)
  "Run BODY in a buffer with `whitespace-mode' style STYLE.
The buffer is displayed in `selected-window', and
`noninteractive' is set to nil even in batch mode.  If STYLE is
nil, `whitespace-mode' is left disabled."
  (declare (debug ((style form) def-body))
           (indent 1))
  `(ert-with-test-buffer-selected ()
     ;; In case global-*-mode is enabled.
     (whitespace-mode -1)
     (font-lock-mode -1)
     (let ((noninteractive nil)
           (whitespace-style ,style))
       (font-lock-mode 1)
       ,(when style
          '(whitespace-mode 1))
       ,@body)))

(defmacro whitespace--with-buffer-selected (buffer-or-name &rest body)
  (declare (debug (form body)) (indent 1))
  `(save-window-excursion
     (with-current-buffer (or ,buffer-or-name (current-buffer))
       (with-selected-window (display-buffer (current-buffer))
         ,@body))))

(defun whitespace-tests--faceup (&rest lines)
  "Convenience wrapper around `faceup-test-font-lock-buffer'.
Returns non-nil if the concatenated LINES match the current
buffer's content."
  (faceup-test-font-lock-buffer nil (apply #'concat lines)))
(let ((x (get 'faceup-test-font-lock-buffer 'ert-explainer)))
  (put 'whitespace-tests--faceup 'ert-explainer
       (lambda (&rest lines) (funcall x nil (apply #'concat lines)))))

(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."
  (setq whitespace-mode t)
  (whitespace-turn-on)
  (whitespace-action-when-on))

(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-turn-off)
                            buffer-display-table))))))

(ert-deftest whitespace-tests--empty-bob ()
  (whitespace-tests--with-test-buffer '(face empty)
    (electric-indent-mode -1)

    ;; Insert some empty lines.  None of the lines should be
    ;; highlighted even though point is on the last line because the
    ;; entire buffer is empty lines.
    (execute-kbd-macro (kbd "SPC RET C-q TAB RET RET SPC"))
    (should (equal (buffer-string) " \n\t\n\n "))
    (should (equal (line-number-at-pos) 4))
    (should (whitespace-tests--faceup " \n"
                                      "\t\n"
                                      "\n"
                                      " "))

    ;; Adding content on the last line (and keeping point there)
    ;; should cause the previous lines to be highlighted.  Note that
    ;; the `whitespace-empty' face applies to the newline just before
    ;; the last line, which has the desired property of extending the
    ;; highlight the full width of the window.
    (execute-kbd-macro (kbd "x"))
    (should (equal (buffer-string) " \n\t\n\n x"))
    (should (equal (line-number-at-pos) 4))
    (should (whitespace-tests--faceup "«:whitespace-empty: \n"
                                      "\t\n"
                                      "\n"
                                      "» x"))

    ;; Lines should become un-highlighted as point moves up into the
    ;; empty lines.
    (execute-kbd-macro (kbd "<up>"))
    (should (equal (line-number-at-pos) 3))
    (should (whitespace-tests--faceup "«:whitespace-empty: \n"
                                      "\t\n"
\n"
                                      " x"))
    (execute-kbd-macro (kbd "<up>"))
    (should (equal (line-number-at-pos) 2))
    (should (whitespace-tests--faceup "«:whitespace-empty: \n"
\t\n"
                                      "\n"
                                      " x"))
    (execute-kbd-macro (kbd "<up> C-a"))
    (should (equal (point) 1))
    (should (whitespace-tests--faceup " \n"
                                      "\t\n"
                                      "\n"
                                      " x"))

    ;; Line 1 should be un-highlighted when point is in line 1 even if
    ;; point is not bobp.
    (execute-kbd-macro (kbd "<right>"))
    (should (equal (line-number-at-pos) 1))
    (should (> (point) 1))
    (should (whitespace-tests--faceup " \n"
                                      "\t\n"
                                      "\n"
                                      " x"))

    ;; Make sure lines become re-highlighted as point moves down.
    (execute-kbd-macro (kbd "<down>"))
    (should (equal (line-number-at-pos) 2))
    (should (whitespace-tests--faceup "«:whitespace-empty: \n"
\t\n"
                                      "\n"
                                      " x"))
    (execute-kbd-macro (kbd "<down>"))
    (should (equal (line-number-at-pos) 3))
    (should (whitespace-tests--faceup "«:whitespace-empty: \n"
                                      "\t\n"
\n"
                                      " x"))
    (execute-kbd-macro (kbd "<down>"))
    (should (equal (line-number-at-pos) 4))
    (should (whitespace-tests--faceup "«:whitespace-empty: \n"
                                      "\t\n"
                                      "\n"
                                      "» x"))

    ;; Inserting content on line 2 should un-highlight lines 2 and 3.
    (execute-kbd-macro (kbd "<up> <up> C-e"))
    (should (equal (line-number-at-pos) 2))
    (should (equal (- (point) (line-beginning-position)) 1))
    (execute-kbd-macro (kbd "y <down> <down>"))
    (should (equal (line-number-at-pos) 4))
    (should (whitespace-tests--faceup "«:whitespace-empty: \n"
\ty\n"
                                      "\n"
                                      " x"))

    ;; Removing the content on line 2 should re-highlight lines 2 and
    ;; 3.
    (execute-kbd-macro (kbd "<up> <up> C-e"))
    (should (equal (line-number-at-pos) 2))
    (should (equal (- (point) (line-beginning-position)) 2))
    (execute-kbd-macro (kbd "DEL <down> <down>"))
    (should (equal (line-number-at-pos) 4))
    (should (whitespace-tests--faceup "«:whitespace-empty: \n"
                                      "\t\n"
                                      "\n"
                                      "» x"))))

(ert-deftest whitespace-tests--empty-eob ()
  (whitespace-tests--with-test-buffer '(face empty)
    (electric-indent-mode -1)

    ;; Insert some empty lines.  None of the lines should be
    ;; highlighted even though point is on line 1 because the entire
    ;; buffer is empty lines.
    (execute-kbd-macro (kbd "RET RET C-q TAB RET SPC C-<home>"))
    (should (equal (buffer-string) "\n\n\t\n "))
    (should (equal (line-number-at-pos) 1))
    (should (whitespace-tests--faceup "\n"
                                      "\n"
                                      "\t\n"
                                      " "))

    ;; Adding content on the first line (and keeping point there)
    ;; should cause the subsequent lines to be highlighted.
    (execute-kbd-macro (kbd "x"))
    (should (equal (buffer-string) "x\n\n\t\n "))
    (should (equal (line-number-at-pos) 1))
    (should (whitespace-tests--faceup "x\n"
                                      "«:whitespace-empty:\n"
                                      "\t\n"
                                      " »"))

    ;; Lines should become un-highlighted as point moves down into the
    ;; empty lines.
    (execute-kbd-macro (kbd "<down>"))
    (should (equal (line-number-at-pos) 2))
    (should (whitespace-tests--faceup "x\n"
                                      "\n"
                                      "«:whitespace-empty:\t\n"
                                      " »"))
    (execute-kbd-macro (kbd "<down>"))
    (should (equal (line-number-at-pos) 3))
    (should (whitespace-tests--faceup "x\n"
                                      "\n"
                                      "\t\n"
                                      "«:whitespace-empty: »"))
    (execute-kbd-macro (kbd "C-<end>"))
    (should (equal (line-number-at-pos) 4))
    (should (eobp))
    (should (equal (- (point) (line-beginning-position)) 1))
    (should (whitespace-tests--faceup "x\n"
                                      "\n"
                                      "\t\n"
                                      " "))

    ;; The last line should be un-highlighted when point is in that
    ;; line even if point is not eobp.
    (execute-kbd-macro (kbd "<left>"))
    (should (equal (line-number-at-pos) 4))
    (should (not (eobp)))
    (should (whitespace-tests--faceup "x\n"
                                      "\n"
                                      "\t\n"
                                      " "))

    ;; Make sure lines become re-highlighted as point moves up.
    (execute-kbd-macro (kbd "<up>"))
    (should (equal (line-number-at-pos) 3))
    (should (whitespace-tests--faceup "x\n"
                                      "\n"
                                      "\t\n"
                                      "«:whitespace-empty: »"))
    (execute-kbd-macro (kbd "<up>"))
    (should (equal (line-number-at-pos) 2))
    (should (whitespace-tests--faceup "x\n"
                                      "\n"
                                      "«:whitespace-empty:\t\n"
                                      " »"))
    (execute-kbd-macro (kbd "<up>"))
    (should (equal (line-number-at-pos) 1))
    (should (whitespace-tests--faceup "x\n"
                                      "«:whitespace-empty:\n"
                                      "\t\n"
                                      " »"))

    ;; Inserting content on line 3 should un-highlight lines 2 and 3.
    (execute-kbd-macro (kbd "<down> <down> C-a"))
    (should (equal (line-number-at-pos) 3))
    (should (equal (- (point) (line-beginning-position)) 0))
    (execute-kbd-macro (kbd "y <up> <up>"))
    (should (equal (line-number-at-pos) 1))
    (should (whitespace-tests--faceup "x\n"
                                      "\n"
                                      "y\t\n"
                                      "«:whitespace-empty: »"))

    ;; Removing the content on line 3 should re-highlight lines 2 and
    ;; 3.
    (execute-kbd-macro (kbd "<down> <down> C-a"))
    (should (equal (line-number-at-pos) 3))
    (should (equal (- (point) (line-beginning-position)) 0))
    (execute-kbd-macro (kbd "<deletechar> <up> <up>"))
    (should (equal (line-number-at-pos) 1))
    (should (whitespace-tests--faceup "x\n"
                                      "«:whitespace-empty:\n"
                                      "\t\n"
                                      " »"))))

(ert-deftest whitespace-tests--empty-bob-eob-read-only-buffer ()
  (whitespace-tests--with-test-buffer '()
    (insert "\nx\n\n")
    (should (equal (buffer-string) "\nx\n\n"))
    (setq-local buffer-read-only t)
    (goto-char 2)
    (should (equal (line-number-at-pos) 2))
    (should (equal (- (point) (line-beginning-position)) 0))
    (let ((whitespace-style '(face empty)))
      (whitespace-mode 1)
      (should (whitespace-tests--faceup "«:whitespace-empty:\n"
                                        "»x\n"
                                        "«:whitespace-empty:\n"
                                        "»")))))

(ert-deftest whitespace-tests--empty-bob-eob-modified ()
  "Regression test for Bug#60066."
  (whitespace-tests--with-test-buffer '()
    (insert "\nx\n\n")
    (goto-char 2)
    (set-buffer-modified-p nil)
    (let ((whitespace-style '(face empty)))
      (whitespace-mode 1)
      (should (not (buffer-modified-p))))))

(ert-deftest whitespace-tests--indirect-clone-breaks-base-markers ()
  "Specific regression test for Bug#59618."
  (whitespace-tests--with-test-buffer '(face empty)
    (insert "\nx\n\n")
    (let ((base (current-buffer))
          ;; `unwind-protect' is not used to clean up `indirect'
          ;; because the buffer should only be killed on success.
          (indirect (clone-indirect-buffer (buffer-name) nil)))
      (should (eq (marker-buffer whitespace-bob-marker) base))
      (should (eq (marker-buffer whitespace-eob-marker) base))
      (whitespace--with-buffer-selected indirect
        ;; Mutate the indirect buffer to update its bob/eob markers.
        (execute-kbd-macro (kbd "z RET M-< a")))
      ;; With Bug#59618, the above mutation would cause the base
      ;; buffer's markers to point inside the indirect buffer because
      ;; the indirect buffer erroneously shared marker objects with
      ;; the base buffer.  Killing the indirect buffer would then
      ;; invalidate those markers (make them point nowhere).
      (kill-buffer indirect)
      (should (eq (marker-buffer whitespace-bob-marker) base))
      (should (eq (marker-buffer whitespace-eob-marker) base)))))

(defun whitespace-tests--check-markers (buf bpos epos)
  (with-current-buffer buf
    (should (eq (marker-buffer whitespace-bob-marker) buf))
    (should (eq (marker-position whitespace-bob-marker) bpos))
    (should (eq (marker-buffer whitespace-eob-marker) buf))
    (should (eq (marker-position whitespace-eob-marker) epos))))

(ert-deftest whitespace-tests--indirect-clone-markers ()
  "Test `whitespace--clone' on indirect clones."
  (whitespace-tests--with-test-buffer '(face empty)
    (insert "\nx\n\n")
    (let ((base (current-buffer))
          ;; `unwind-protect' is not used to clean up `indirect'
          ;; because the buffer should only be killed on success.
          (indirect (clone-indirect-buffer nil nil)))
      (whitespace-tests--check-markers base 2 4)
      (whitespace--with-buffer-selected indirect
        (whitespace-tests--check-markers indirect 2 4)
        ;; Mutate the buffer to trigger `after-change-functions' and
        ;; thus `whitespace--update-bob-eob'.
        (execute-kbd-macro (kbd "z RET M-< a"))
        (whitespace-tests--check-markers indirect 1 8))
      (kill-buffer indirect)
      ;; When the buffer was modified above, the new "a" character at
      ;; the beginning moved the base buffer's markers by one.  Emacs
      ;; did not run the base buffer's `after-change-functions' after
      ;; the indirect buffer was edited (Bug#46982), so the end result
      ;; is just the shift by one.
      (whitespace-tests--check-markers base 3 5))))

(ert-deftest whitespace-tests--regular-clone-markers ()
  "Test `whitespace--clone' on regular clones."
  (whitespace-tests--with-test-buffer '(face empty)
    (insert "\nx\n\n")
    (let ((orig (current-buffer))
          ;; `unwind-protect' is not used to clean up `clone' because
          ;; the buffer should only be killed on success.
          (clone (clone-buffer)))
      (whitespace-tests--check-markers orig 2 4)
      (whitespace--with-buffer-selected clone
        (whitespace-tests--check-markers clone 2 4)
        (execute-kbd-macro (kbd "z RET M-< a"))
        (whitespace-tests--check-markers clone 1 8))
      (kill-buffer clone)
      (whitespace-tests--check-markers orig 2 4))))

(provide 'whitespace-tests)

;;; whitespace-tests.el ends here

debug log:

solving 12f6cb99a2 ...
found 12f6cb99a2 in https://git.savannah.gnu.org/cgit/emacs.git

(*) Git path names are given by the tree(s) the blob belongs to.
    Blobs themselves have no identifier aside from the hash of its contents.^

Code repositories for project(s) associated with this external index

	https://git.savannah.gnu.org/cgit/emacs.git
	https://git.savannah.gnu.org/cgit/emacs/org-mode.git

This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.