332 lines
14 KiB
EmacsLisp
332 lines
14 KiB
EmacsLisp
;;; whitespace-tests.el --- Test suite for whitespace -*- lexical-binding: t -*-
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;; Copyright (C) 2016-2022 Free Software Foundation, Inc.
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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;;; Code:
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(require 'ert)
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(require 'ert-x)
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(require 'faceup)
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(require 'whitespace)
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(defmacro whitespace-tests--with-test-buffer (style &rest body)
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"Run BODY in a buffer with `whitespace-mode' style STYLE.
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The buffer is displayed in `selected-window', and
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`noninteractive' is set to nil even in batch mode. If STYLE is
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nil, `whitespace-mode' is left disabled."
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(declare (debug ((style form) def-body))
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(indent 1))
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`(ert-with-test-buffer-selected ()
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;; In case global-*-mode is enabled.
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(whitespace-mode -1)
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(font-lock-mode -1)
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(let ((noninteractive nil)
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(whitespace-style ,style))
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(font-lock-mode 1)
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,(when style
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'(whitespace-mode 1))
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,@body)))
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(defun whitespace-tests--faceup (&rest lines)
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"Convenience wrapper around `faceup-test-font-lock-buffer'.
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Returns non-nil if the concatenated LINES match the current
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buffer's content."
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(faceup-test-font-lock-buffer nil (apply #'concat lines)))
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(let ((x (get 'faceup-test-font-lock-buffer 'ert-explainer)))
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(put 'whitespace-tests--faceup 'ert-explainer
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(lambda (&rest lines) (funcall x nil (apply #'concat lines)))))
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(defun whitespace-tests--cleanup-string (string)
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(with-temp-buffer
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(insert string)
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(whitespace-cleanup)
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(buffer-string)))
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(ert-deftest whitespace-cleanup-eob ()
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(let ((whitespace-style '(empty)))
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(should (equal (whitespace-tests--cleanup-string "a\n")
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"a\n"))
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(should (equal (whitespace-tests--cleanup-string "a\n\n")
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"a\n"))
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(should (equal (whitespace-tests--cleanup-string "a\n\t\n")
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"a\n"))
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(should (equal (whitespace-tests--cleanup-string "a\n\t \n")
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"a\n"))
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(should (equal (whitespace-tests--cleanup-string "a\n\t \n\n")
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"a\n"))
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(should (equal (whitespace-tests--cleanup-string "\n\t\n")
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""))
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;; Whitespace at end of non-empty line is not covered by the
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;; `empty' style.
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(should (equal (whitespace-tests--cleanup-string "a \n\t \n\n")
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"a \n"))))
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;; We cannot call whitespace-mode because it will do nothing in batch
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;; mode. So we call its innards instead.
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(defun whitespace-tests-whitespace-mode-on ()
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"Turn `whitespace-mode' on even in batch mode."
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(setq whitespace-mode t)
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(whitespace-turn-on)
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(whitespace-action-when-on))
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(ert-deftest whitespace-tests-display-tables ()
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"Test whitespace stores and restores the buffer display table - bug26892."
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(with-temp-buffer
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(whitespace-mode -1) ; turn off in case global ws mode is active
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(let ((whitespace-style '(space-mark tab-mark newline-mark))
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(whitespace-display-mappings '((space-mark 32 [183] [46])
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(space-mark 160 [164] [95])
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(newline-mark 10 [36 10])
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(tab-mark 9 [187 9] [92 9])))
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(buffer-display-table nil))
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;test the display table actually changes
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(should-not (equal nil
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(progn (whitespace-tests-whitespace-mode-on)
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buffer-display-table)))
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;test the display table restores correctly
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(should (equal nil
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(progn (whitespace-turn-off)
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buffer-display-table)))
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;test the stored display table is preserved
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(should (equal nil
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(progn (whitespace-tests-whitespace-mode-on)
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(whitespace-turn-off)
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buffer-display-table))))))
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(ert-deftest whitespace-tests--empty-bob ()
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(whitespace-tests--with-test-buffer '(face empty)
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(electric-indent-mode -1)
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;; Insert some empty lines. None of the lines should be
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;; highlighted even though point is on the last line because the
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;; entire buffer is empty lines.
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(execute-kbd-macro (kbd "SPC RET C-q TAB RET RET SPC"))
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(should (equal (buffer-string) " \n\t\n\n "))
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(should (equal (line-number-at-pos) 4))
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(should (whitespace-tests--faceup " \n"
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"\t\n"
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"\n"
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" "))
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;; Adding content on the last line (and keeping point there)
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;; should cause the previous lines to be highlighted. Note that
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;; the `whitespace-empty' face applies to the newline just before
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;; the last line, which has the desired property of extending the
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;; highlight the full width of the window.
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(execute-kbd-macro (kbd "x"))
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(should (equal (buffer-string) " \n\t\n\n x"))
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(should (equal (line-number-at-pos) 4))
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(should (whitespace-tests--faceup "«:whitespace-empty: \n"
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"\t\n"
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"\n"
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"» x"))
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;; Lines should become un-highlighted as point moves up into the
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;; empty lines.
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(execute-kbd-macro (kbd "<up>"))
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(should (equal (line-number-at-pos) 3))
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(should (whitespace-tests--faceup "«:whitespace-empty: \n"
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"\t\n"
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"»\n"
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" x"))
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(execute-kbd-macro (kbd "<up>"))
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(should (equal (line-number-at-pos) 2))
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(should (whitespace-tests--faceup "«:whitespace-empty: \n"
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"»\t\n"
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"\n"
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" x"))
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(execute-kbd-macro (kbd "<up> C-a"))
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(should (equal (point) 1))
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(should (whitespace-tests--faceup " \n"
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"\t\n"
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"\n"
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" x"))
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;; Line 1 should be un-highlighted when point is in line 1 even if
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;; point is not bobp.
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(execute-kbd-macro (kbd "<right>"))
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(should (equal (line-number-at-pos) 1))
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(should (> (point) 1))
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(should (whitespace-tests--faceup " \n"
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"\t\n"
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"\n"
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" x"))
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;; Make sure lines become re-highlighted as point moves down.
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(execute-kbd-macro (kbd "<down>"))
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(should (equal (line-number-at-pos) 2))
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(should (whitespace-tests--faceup "«:whitespace-empty: \n"
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"»\t\n"
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"\n"
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" x"))
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(execute-kbd-macro (kbd "<down>"))
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(should (equal (line-number-at-pos) 3))
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(should (whitespace-tests--faceup "«:whitespace-empty: \n"
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"\t\n"
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"»\n"
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" x"))
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(execute-kbd-macro (kbd "<down>"))
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(should (equal (line-number-at-pos) 4))
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(should (whitespace-tests--faceup "«:whitespace-empty: \n"
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"\t\n"
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"\n"
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"» x"))
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;; Inserting content on line 2 should un-highlight lines 2 and 3.
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(execute-kbd-macro (kbd "<up> <up> C-e"))
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(should (equal (line-number-at-pos) 2))
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(should (equal (- (point) (line-beginning-position)) 1))
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(execute-kbd-macro (kbd "y <down> <down>"))
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(should (equal (line-number-at-pos) 4))
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(should (whitespace-tests--faceup "«:whitespace-empty: \n"
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"»\ty\n"
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"\n"
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" x"))
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;; Removing the content on line 2 should re-highlight lines 2 and
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;; 3.
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(execute-kbd-macro (kbd "<up> <up> C-e"))
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(should (equal (line-number-at-pos) 2))
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(should (equal (- (point) (line-beginning-position)) 2))
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(execute-kbd-macro (kbd "DEL <down> <down>"))
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(should (equal (line-number-at-pos) 4))
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(should (whitespace-tests--faceup "«:whitespace-empty: \n"
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"\t\n"
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"\n"
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"» x"))))
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(ert-deftest whitespace-tests--empty-eob ()
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(whitespace-tests--with-test-buffer '(face empty)
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(electric-indent-mode -1)
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;; Insert some empty lines. None of the lines should be
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;; highlighted even though point is on line 1 because the entire
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;; buffer is empty lines.
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(execute-kbd-macro (kbd "RET RET C-q TAB RET SPC C-<home>"))
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(should (equal (buffer-string) "\n\n\t\n "))
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(should (equal (line-number-at-pos) 1))
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(should (whitespace-tests--faceup "\n"
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"\n"
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"\t\n"
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" "))
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;; Adding content on the first line (and keeping point there)
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;; should cause the subsequent lines to be highlighted.
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(execute-kbd-macro (kbd "x"))
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(should (equal (buffer-string) "x\n\n\t\n "))
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(should (equal (line-number-at-pos) 1))
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(should (whitespace-tests--faceup "x\n"
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"«:whitespace-empty:\n"
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"\t\n"
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" »"))
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;; Lines should become un-highlighted as point moves down into the
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;; empty lines.
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(execute-kbd-macro (kbd "<down>"))
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(should (equal (line-number-at-pos) 2))
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(should (whitespace-tests--faceup "x\n"
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"\n"
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"«:whitespace-empty:\t\n"
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" »"))
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(execute-kbd-macro (kbd "<down>"))
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(should (equal (line-number-at-pos) 3))
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(should (whitespace-tests--faceup "x\n"
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"\n"
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"\t\n"
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"«:whitespace-empty: »"))
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(execute-kbd-macro (kbd "C-<end>"))
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(should (equal (line-number-at-pos) 4))
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(should (eobp))
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(should (equal (- (point) (line-beginning-position)) 1))
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(should (whitespace-tests--faceup "x\n"
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"\n"
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"\t\n"
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" "))
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;; The last line should be un-highlighted when point is in that
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;; line even if point is not eobp.
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(execute-kbd-macro (kbd "<left>"))
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(should (equal (line-number-at-pos) 4))
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(should (not (eobp)))
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(should (whitespace-tests--faceup "x\n"
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"\n"
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"\t\n"
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" "))
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;; Make sure lines become re-highlighted as point moves up.
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(execute-kbd-macro (kbd "<up>"))
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(should (equal (line-number-at-pos) 3))
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(should (whitespace-tests--faceup "x\n"
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"\n"
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"\t\n"
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"«:whitespace-empty: »"))
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(execute-kbd-macro (kbd "<up>"))
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(should (equal (line-number-at-pos) 2))
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(should (whitespace-tests--faceup "x\n"
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"\n"
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"«:whitespace-empty:\t\n"
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" »"))
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(execute-kbd-macro (kbd "<up>"))
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(should (equal (line-number-at-pos) 1))
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(should (whitespace-tests--faceup "x\n"
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"«:whitespace-empty:\n"
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"\t\n"
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" »"))
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;; Inserting content on line 3 should un-highlight lines 2 and 3.
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(execute-kbd-macro (kbd "<down> <down> C-a"))
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(should (equal (line-number-at-pos) 3))
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(should (equal (- (point) (line-beginning-position)) 0))
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(execute-kbd-macro (kbd "y <up> <up>"))
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(should (equal (line-number-at-pos) 1))
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(should (whitespace-tests--faceup "x\n"
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"\n"
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"y\t\n"
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"«:whitespace-empty: »"))
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;; Removing the content on line 3 should re-highlight lines 2 and
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;; 3.
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(execute-kbd-macro (kbd "<down> <down> C-a"))
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(should (equal (line-number-at-pos) 3))
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(should (equal (- (point) (line-beginning-position)) 0))
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(execute-kbd-macro (kbd "<deletechar> <up> <up>"))
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(should (equal (line-number-at-pos) 1))
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(should (whitespace-tests--faceup "x\n"
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"«:whitespace-empty:\n"
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"\t\n"
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" »"))))
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(ert-deftest whitespace-tests--empty-bob-eob-read-only-buffer ()
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(whitespace-tests--with-test-buffer '()
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(insert "\nx\n\n")
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(should (equal (buffer-string) "\nx\n\n"))
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(setq-local buffer-read-only t)
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(goto-char 2)
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(should (equal (line-number-at-pos) 2))
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(should (equal (- (point) (line-beginning-position)) 0))
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(let ((whitespace-style '(face empty)))
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(whitespace-mode 1)
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(should (whitespace-tests--faceup "«:whitespace-empty:\n"
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"»x\n"
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"«:whitespace-empty:\n"
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"»")))))
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(provide 'whitespace-tests)
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;;; whitespace-tests.el ends here
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