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;;; sgml-mode-tests.el --- Tests for sgml-mode -*- lexical-binding:t -*-
;; Copyright (C) 2015-2025 Free Software Foundation, Inc.
;; Author: Przemysław Wojnowski <esperanto@cumego.com>
;; Keywords: tests
;; 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:
;;; Code:
(require 'sgml-mode)
(require 'ert)
(defmacro sgml-with-content (content &rest body)
"Insert CONTENT into a temporary `sgml-mode' buffer and execute BODY on it.
The point is set to the beginning of the buffer."
`(with-temp-buffer
(sgml-mode)
(insert ,content)
(goto-char (point-min))
,@body))
;;; sgml-delete-tag
(ert-deftest sgml-delete-tag-should-not-delete-tags-when-wrong-args ()
"Don't delete tag, when number of tags to delete is not positive number."
(let ((content "<p>Valar Morghulis</p>"))
(sgml-with-content
content
(sgml-delete-tag -1)
(should (string= content (buffer-string)))
(sgml-delete-tag 0)
(should (string= content (buffer-string))))))
(ert-deftest sgml-delete-tag-should-delete-tags-n-times ()
;; Delete only 1, when 1 available:
(sgml-with-content
"<br />"
(sgml-delete-tag 1)
(should (string= "" (buffer-string))))
;; Delete from position on whitespaces before tag:
(sgml-with-content
" \t\n<br />"
(sgml-delete-tag 1)
(should (string= "" (buffer-string))))
;; Delete from position on tag:
(sgml-with-content
"<br />"
(goto-char 3)
(sgml-delete-tag 1)
(should (string= "" (buffer-string))))
;; Delete one by one:
(sgml-with-content
"<h1><p>You know nothing, Jon Snow.</p></h1>"
(sgml-delete-tag 1)
(should (string= "<p>You know nothing, Jon Snow.</p>" (buffer-string)))
(sgml-delete-tag 1)
(should (string= "You know nothing, Jon Snow." (buffer-string))))
;; Delete 2 at a time, when 2 available:
(sgml-with-content
"<h1><p>You know nothing, Jon Snow.</p></h1>"
(sgml-delete-tag 2)
(should (string= "You know nothing, Jon Snow." (buffer-string)))))
(ert-deftest sgml-delete-tag-should-delete-unclosed-tag ()
(sgml-with-content
"<ul><li>Keep your stones connected.</ul>"
(goto-char 5) ; position on "li" tag
(sgml-delete-tag 1)
(should (string= "<ul>Keep your stones connected.</ul>" (buffer-string)))))
(ert-deftest sgml-delete-tag-should-signal-error-for-malformed-tags ()
(let ((content "<h1><h2>Drakaris!</h1></h2>"))
;; Delete outside tag:
(sgml-with-content
content
(sgml-delete-tag 1)
(should (string= "<h2>Drakaris!</h2>" (buffer-string))))
;; Delete inner tag:
(sgml-with-content
content
(goto-char 5) ; position the inner tag
(sgml-delete-tag 1)
(should (string= "<h1>Drakaris!</h1>" (buffer-string))))))
(ert-deftest sgml-delete-tag-should-signal-error-when-deleting-too-much ()
(let ((content "<emph>Drakaris!</emph>"))
;; No tags to delete:
(sgml-with-content
"Drakaris!"
(should-error (sgml-delete-tag 1) :type 'error)
(should (string= "Drakaris!" (buffer-string))))
;; Trying to delete 2 tags, when only 1 available:
(sgml-with-content
content
(should-error (sgml-delete-tag 2) :type 'error)
(should (string= "Drakaris!" (buffer-string))))
;; Trying to delete a tag, but not on/before a tag:
(sgml-with-content
content
(goto-char 7) ; D in Drakaris
(should-error (sgml-delete-tag 1) :type 'error)
(should (string= content (buffer-string))))
;; Trying to delete a tag from position outside tag:
(sgml-with-content
content
(goto-char (point-max))
(should-error (sgml-delete-tag 1) :type 'error)
(should (string= content (buffer-string))))))
(ert-deftest sgml-delete-tag-bug-8203-should-not-delete-apostrophe ()
(sgml-with-content
"<title>Winter is comin'</title>"
(sgml-delete-tag 1)
(should (string= "Winter is comin'" (buffer-string)))))
(ert-deftest sgml-quote-works ()
(let ((text "Foo<Bar> \"Baz\" 'Qux'\n"))
(with-temp-buffer
;; Back and forth transformation.
(insert text)
(sgml-quote (point-min) (point-max))
(should (string= "Foo<Bar> "Baz" 'Qux'\n"
(buffer-string)))
(sgml-quote (point-min) (point-max) t)
(should (string= text (buffer-string)))
;; The same text escaped differently.
(erase-buffer)
(insert "Foo<Bar> "Baz" 'Qux'\n")
(sgml-quote (point-min) (point-max) t)
(should (string= text (buffer-string)))
;; Lack of semicolon.
(erase-buffer)
(insert "&&")
(sgml-quote (point-min) (point-max) t)
(should (string= "&&" (buffer-string)))
;; Double quoting
(sgml-quote (point-min) (point-max))
(sgml-quote (point-min) (point-max))
(sgml-quote (point-min) (point-max) t)
(sgml-quote (point-min) (point-max) t)
(should (string= "&&" (buffer-string))))))
(ert-deftest sgml-tests--quotes-syntax ()
(dolist (str '("a\"b <t>c'd</t>"
"a'b <t>c\"d</t>"
"<t>\"a'</t>"
"<t>'a\"</t>"
"<t>\"a'\"</t>"
"<t>'a\"'</t>"
"a\"b <tag>c'd</tag>"
"<tag>c>'d</tag>"
"<t><!-- \" --></t>"
"<t><!-- ' --></t>"
"<t>(')</t>"
"<t>(\")</t>"
))
(with-temp-buffer
(sgml-mode)
(insert str)
(ert-info ((format "%S" str) :prefix "Test case: ")
;; Check that last tag is parsed as a tag.
(should (= 1 (car (syntax-ppss (1- (point-max))))))
(should (= 0 (car (syntax-ppss (point-max)))))))))
(ert-deftest sgml-mode-quote-in-long-text ()
(with-temp-buffer
(sgml-mode)
(insert "<t>"
;; `syntax-propertize-wholelines' extends chunk size based
;; on line length, so newlines are significant!
(make-string syntax-propertize-chunk-size ?a) "\n"
"'"
(make-string syntax-propertize-chunk-size ?a) "\n"
"</t>")
;; If we just check (syntax-ppss (point-max)) immediately, then
;; we'll end up propertizing the whole buffer in one chunk (so the
;; test is useless). Simulate something more like what happens
;; when the buffer is viewed normally.
(cl-loop for pos from (point-min) to (point-max)
by syntax-propertize-chunk-size
do (syntax-ppss pos))
(syntax-ppss (point-max))
;; Check that last tag is parsed as a tag.
(should (= 1 (- (car (syntax-ppss (1- (point-max))))
(car (syntax-ppss (point-max))))))))
(ert-deftest sgml-test-brackets ()
"Test fontification of apostrophe preceded by paired-bracket character."
(let (brackets)
(map-char-table
(lambda (key value)
(setq brackets (cons (list
(if (consp key)
(list (car key) (cdr key))
key)
value)
brackets)))
(unicode-property-table-internal 'paired-bracket))
(setq brackets (delete-dups (flatten-tree brackets)))
(setq brackets (append brackets (list ?$ ?% ?& ?* ?+ ?/)))
(with-temp-buffer
(while brackets
(let ((char (string (pop brackets))))
(insert (concat "<p>" char "'s</p>\n"))))
(html-mode)
(font-lock-ensure (point-min) (point-max))
(goto-char (point-min))
(while (not (eobp))
(goto-char (next-single-char-property-change (point) 'face))
(let ((val (get-text-property (point) 'face)))
(when val
(should-not (eq val 'font-lock-string-face))))))))
(provide 'sgml-mode-tests)
;;; sgml-mode-tests.el ends here
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