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;;; xml-tests.el --- Test suite for XML parsing. -*- lexical-binding:t -*-
;; Copyright (C) 2012-2025 Free Software Foundation, Inc.
;; Author: Chong Yidong <cyd@stupidchicken.com>
;; Keywords: internal
;; Human-Keywords: internal
;; 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:
;; Type M-x test-xml-parse RET to generate the test buffer.
;;; Code:
(require 'ert)
(require 'xml)
(defvar xml-parse-tests--data
`(;; General entity substitution
("<?xml version=\"1.0\"?><!DOCTYPE foo SYSTEM \"bar.dtd\" [<!ENTITY ent \"AbC\">]><foo a=\"b\"><bar>&ent;;</bar></foo>" .
((foo ((a . "b")) (bar nil "AbC;"))))
("<?xml version=\"1.0\"?><foo>&amp;&apos;'<>"</foo>" .
((foo () "&''<>\"")))
;; Parameter entity substitution
("<?xml version=\"1.0\"?><!DOCTYPE foo SYSTEM \"bar.dtd\" [<!ENTITY % pent \"AbC\"><!ENTITY ent \"%pent;\">]><foo a=\"b\"><bar>&ent;;</bar></foo>" .
((foo ((a . "b")) (bar nil "AbC;"))))
;; Tricky parameter entity substitution (like XML spec Appendix D)
("<?xml version='1.0'?><!DOCTYPE foo [ <!ENTITY % xx '%zz;'><!ENTITY % zz '<!ENTITY ent \"b\" >' > %xx; ]><foo>A&ent;C</foo>" .
((foo () "AbC")))
;; Bug#7172
("<?xml version=\"1.0\"?><!DOCTYPE foo [ <!ELEMENT EXAM_PLE EMPTY> ]><foo></foo>" .
((foo ())))
;; Entities referencing entities, in character data
("<!DOCTYPE foo [ <!ENTITY b \"B\"><!ENTITY abc \"a&b;c\">]><foo>&abc;</foo>" .
((foo () "aBc")))
;; Entities referencing entities, in attribute values
("<!DOCTYPE foo [ <!ENTITY b \"B\"><!ENTITY abc \"a&b;c\">]><foo a=\"-&abc;-\">1</foo>" .
((foo ((a . "-aBc-")) "1")))
;; Character references must be treated as character data
("<foo>AT&T;</foo>" . ((foo () "AT&T;")))
("<foo>&amp;</foo>" . ((foo () "&")))
("<foo>&amp;</foo>" . ((foo () "&")))
;; Unusual but valid XML names [5]
("<ÀÖØö.3·-‿⁀>abc</ÀÖØö.3·-‿⁀>" . ((,(intern "ÀÖØö.3·-‿⁀") () "abc")))
("<:>abc</:>" . ((,(intern ":") () "abc"))))
"Alist of XML strings and their expected parse trees.")
(defvar xml-parse-tests--bad-data
'(;; XML bomb in content
"<!DOCTYPE foo [<!ENTITY lol \"lol\"><!ENTITY lol1 \"&lol;&lol;&lol;&lol;&lol;&lol;&lol;&lol;&lol;&lol;\"><!ENTITY lol2 \"&lol1;&lol1;&lol1;&lol1;&lol1;&lol1;&lol1;&lol1;&lol1;&lol1;\">]><foo>&lol2;</foo>"
;; XML bomb in attribute value
"<!DOCTYPE foo [<!ENTITY lol \"lol\"><!ENTITY lol1 \"&lol;&lol;&lol;&lol;&lol;&lol;&lol;&lol;&lol;&lol;\"><!ENTITY lol2 \"&lol1;&lol1;&lol1;&lol1;&lol1;&lol1;&lol1;&lol1;&lol1;&lol1;\">]><foo a=\"&lol2;\">!</foo>"
;; Non-terminating DTD
"<!DOCTYPE foo [ <!ENTITY b \"B\"><!ENTITY abc \"a&b;c\">"
"<!DOCTYPE foo [ <!ENTITY b \"B\"><!ENTITY abc \"a&b;c\">asdf"
"<!DOCTYPE foo [ <!ENTITY b \"B\"><!ENTITY abc \"a&b;c\">asdf&abc;"
;; Invalid XML names
"<0foo>abc</0foo>"
"<‿foo>abc</‿foo>"
"<f¿>abc</f¿>"
;; Two root tags
"<a/><b></b>"
;; Bug#16344
"<!----><x>< /x>"
"<a>< b/></a>")
"List of XML strings that should signal an error in the parser.")
(defvar xml-parse-tests--qnames
'( ;; Test data for name expansion
("<?xml version=\"1.0\" encoding=\"UTF-8\"?><D:multistatus xmlns:D=\"DAV:\"><D:response><D:href>/calendar/events/</D:href><D:propstat><D:status>HTTP/1.1 200 OK</D:status></D:propstat></D:response></D:multistatus>"
;; Result with qnames as cons
((("DAV:" . "multistatus")
((("http://www.w3.org/2000/xmlns/" . "D") . "DAV:"))
(("DAV:" . "response") nil (("DAV:" . "href") nil "/calendar/events/")
(("DAV:" . "propstat") nil (("DAV:" . "status") nil "HTTP/1.1 200 OK")))))
;; Result with qnames as symbols
((DAV:multistatus
((("http://www.w3.org/2000/xmlns/" . "D") . "DAV:"))
(DAV:response nil (DAV:href nil "/calendar/events/")
(DAV:propstat nil (DAV:status nil "HTTP/1.1 200 OK"))))))
("<?xml version=\"1.0\" encoding=\"UTF-8\"?><F:something>hi there</F:something>"
((("FOOBAR:" . "something") nil "hi there"))
((FOOBAR:something nil "hi there"))))
"List of strings which are parsed using namespace expansion.
Parser is called with and without `symbol-qnames' argument.")
(ert-deftest xml-parse-tests ()
"Test XML parsing."
(with-temp-buffer
(dolist (test xml-parse-tests--data)
(erase-buffer)
(insert (car test))
(should (equal (cdr test) (xml-parse-region))))
(let ((xml-entity-expansion-limit 50))
(dolist (test xml-parse-tests--bad-data)
(erase-buffer)
(insert test)
(should-error (xml-parse-region))))
(let ((testdata (car xml-parse-tests--qnames)))
(erase-buffer)
(insert (car testdata))
(should (equal (nth 1 testdata)
(xml-parse-region nil nil nil nil t)))
(should (equal (nth 2 testdata)
(xml-parse-region nil nil nil nil 'symbol-qnames))))
(let ((testdata (nth 1 xml-parse-tests--qnames)))
(erase-buffer)
(insert (car testdata))
;; Provide additional namespace-URI mapping
(should (equal (nth 1 testdata)
(xml-parse-region
nil nil nil nil
(append xml-default-ns
'(("F" . "FOOBAR:"))))))
(should (equal (nth 2 testdata)
(xml-parse-region
nil nil nil nil
(cons 'symbol-qnames
(append xml-default-ns
'(("F" . "FOOBAR:"))))))))))
;; Test bug #23440 (proper expansion of default namespace)
; Test data for default namespace
(defvar xml-parse-test--default-namespace-qnames
(cons "<something xmlns=\"myns:\"><whatever></whatever></something>"
'((myns:something
((("http://www.w3.org/2000/xmlns/" . "")
. "myns:"))
(myns:whatever nil)))))
(ert-deftest xml-parse-test-default-namespace-qnames ()
(with-temp-buffer
(insert (car xml-parse-test--default-namespace-qnames))
(should (equal (cdr xml-parse-test--default-namespace-qnames)
(xml-parse-region nil nil nil nil 'symbol-qnames)))))
;; Test bug #26533 (proper expansion in prefixed attributes with 'symbol-qnames)
(defvar xml-parse-test--namespace-attribute-qnames
(cons "<something xmlns:a=\"myns:\"><whatever a:b='c'></whatever></something>"
'((something
((("http://www.w3.org/2000/xmlns/" . "a")
. "myns:"))
(whatever
((myns:b . "c")))))))
(ert-deftest xml-parse-namespace-attribute-qnames ()
(with-temp-buffer
(insert (car xml-parse-test--namespace-attribute-qnames))
(should (equal (cdr xml-parse-test--namespace-attribute-qnames)
(xml-parse-region nil nil nil nil 'symbol-qnames)))))
(ert-deftest xml-print-invalid-cdata ()
"Check that Bug#41094 is fixed."
(with-temp-buffer
(should (equal (should-error (xml-print '((foo () "\0")))
:type 'xml-invalid-character)
'(xml-invalid-character 0 1)))
(should (equal (should-error (xml-print '((foo () "\u00FF \xFF")))
:type 'xml-invalid-character)
'(xml-invalid-character #x3FFFFF 3)))))
(defvar xml-tests--data-with-comments
`(;; simple case
("<?xml version=\"1.0\"?><foo baz=\"true\">bar</foo>"
. ((foo ((baz . "true")) "bar")))
;; toplevel comments -- first document child must not get lost
(,(concat "<?xml version=\"1.0\"?><foo>bar</foo><!--comment-1-->"
"<!--comment-2-->")
. ((foo nil "bar")))
(,(concat "<?xml version=\"1.0\"?><!--comment-a--><foo a=\"b\">"
"<bar>blub</bar></foo><!--comment-b--><!--comment-c-->")
. ((foo ((a . "b")) (bar nil "blub")))))
"Alist of XML strings and their expected parse trees for discarded comments.")
(ert-deftest xml-remove-comments ()
(dolist (test xml-tests--data-with-comments)
(erase-buffer)
(insert (car test))
(xml-remove-comments (point-min) (point-max))
(should (equal (cdr test)
(xml-parse-region (point-min) (point-max))))))
;;; xml-tests.el ends here
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