org-mode-mirror/testing/lisp/test-org-export.el

;;; test-org-export.el --- Tests for org-export.el

;; Copyright (C) 2012  Nicolas Goaziou

;; Author: Nicolas Goaziou <n.goaziou at gmail dot com>

;; Released under the GNU General Public License version 3
;; see: http://www.gnu.org/licenses/gpl-3.0.html

;;;; Comments



;;; Code:

(unless (featurep 'org-export)
  (signal 'missing-test-dependency "org-export"))

(defmacro org-test-with-backend (backend &rest body)
  "Execute body with an export back-end defined.

BACKEND is the name of the back-end.  BODY is the body to
execute.  The defined back-end simply returns parsed data as Org
syntax."
  (declare (debug (form body)) (indent 1))
  `(let ((org-export-registered-backends
	  ',(list
	     (list backend
		   :translate-alist
		   (let (transcode-table)
		     (dolist (type (append org-element-all-elements
					   org-element-all-objects)
				   transcode-table)
		       (push
			(cons type
			      (lambda (obj contents info)
				(funcall
				 (intern (format "org-element-%s-interpreter"
						 type))
				 obj contents)))
			transcode-table)))))))
     (progn ,@body)))

(defmacro org-test-with-parsed-data (data &rest body)
  "Execute body with parsed data available.

DATA is a string containing the data to be parsed.  BODY is the
body to execute.  Parse tree is available under the `tree'
variable, and communication channel under `info'.

This function calls `org-export-collect-tree-properties'.  As
such, `:ignore-list' (for `org-element-map') and
`:parse-tree' (for `org-export-get-genealogy') properties are
already filled in `info'."
  (declare (debug (form body)) (indent 1))
  `(org-test-with-temp-text ,data
     (let* ((tree (org-element-parse-buffer))
	    (info (org-export-collect-tree-properties
		   tree (org-export-get-environment))))
       ,@body)))



;;; Internal Tests

(ert-deftest test-org-export/bind-keyword ()
  "Test reading #+BIND: keywords."
  ;; Test with `org-export-all-BIND' set to t.
  (should
   (org-test-with-temp-text "#+BIND: variable value"
     (let ((org-export-allow-BIND t))
       (org-export--install-letbind-maybe)
       (eq variable 'value))))
  ;; Test with `org-export-all-BIND' set to nil.
  (should-not
   (org-test-with-temp-text "#+BIND: variable value"
     (let ((org-export-allow-BIND nil))
       (org-export--install-letbind-maybe)
       (boundp 'variable))))
  ;; Test with `org-export-all-BIND' set to 'confirm and
  ;; `org-export--allow-BIND-local' to t .
  (should
   (org-test-with-temp-text "#+BIND: variable value"
     (let ((org-export-allow-BIND 'confirm))
       (org-set-local 'org-export--allow-BIND-local t)
       (org-export--install-letbind-maybe)
       (eq variable 'value))))
  ;; Test with `org-export-all-BIND' set to 'confirm and
  ;; `org-export--allow-BIND-local' to nil.
  (should-not
   (org-test-with-temp-text "#+BIND: variable value"
     (let ((org-export-allow-BIND 'confirm))
       (org-set-local 'org-export--allow-BIND-local nil)
       (org-export--install-letbind-maybe)
       (boundp 'variable))))
  ;; BIND keywords are case-insensitive.
  (should
   (org-test-with-temp-text "#+bind: variable value"
     (let ((org-export-allow-BIND t))
       (org-export--install-letbind-maybe)
       (eq variable 'value)))))

(ert-deftest test-org-export/parse-option-keyword ()
  "Test reading all standard #+OPTIONS: items."
  (should
   (equal
    (org-export--parse-option-keyword
     "H:1 num:t \\n:t timestamp:t arch:t author:t creator:t d:t email:t
 *:t e:t ::t f:t pri:t -:t ^:t toc:t |:t tags:t tasks:t <:t todo:t inline:nil
 stat:t")
    '(:headline-levels
      1 :preserve-breaks t :section-numbers t :time-stamp-file t
      :with-archived-trees t :with-author t :with-creator t :with-drawers t
      :with-email t :with-emphasize t :with-entities t :with-fixed-width t
      :with-footnotes t :with-inlinetasks nil :with-priority t
      :with-special-strings t :with-statistics-cookies t :with-sub-superscript t
      :with-toc t :with-tables t :with-tags t :with-tasks t :with-timestamps t
      :with-todo-keywords t)))
  ;; Test some special values.
  (should
   (equal
    (org-export--parse-option-keyword
     "arch:headline creator:comment d:(\"TEST\")
 ^:{} toc:1 tags:not-in-toc tasks:todo num:2 <:active")
    '( :section-numbers
       2
       :with-archived-trees headline :with-creator comment
       :with-drawers ("TEST") :with-sub-superscript {} :with-toc 1
       :with-tags not-in-toc :with-tasks todo :with-timestamps active))))

(ert-deftest test-org-export/get-inbuffer-options ()
  "Test reading all standard export keywords."
  (should
   (equal
    (org-test-with-temp-text "#+AUTHOR: Me, Myself and I
#+CREATOR: Idem
#+DATE: Today
#+DESCRIPTION: Testing
#+DESCRIPTION: with two lines
#+EMAIL: some@email.org
#+EXCLUDE_TAGS: noexport invisible
#+KEYWORDS: test
#+LANGUAGE: en
#+SELECT_TAGS: export
#+TITLE: Some title
#+TITLE: with spaces"
      (org-export--get-inbuffer-options))
    '(:author
      ("Me, Myself and I") :creator "Idem" :date ("Today")
      :description "Testing\nwith two lines" :email "some@email.org"
      :exclude-tags ("noexport" "invisible") :keywords "test" :language "en"
      :select-tags ("export") :title ("Some title with spaces")))))

(ert-deftest test-org-export/get-subtree-options ()
  "Test setting options from headline's properties."
  ;; EXPORT_TITLE.
  (org-test-with-temp-text "#+TITLE: Title
* Headline
  :PROPERTIES:
  :EXPORT_TITLE: Subtree Title
  :END:
Paragraph"
    (forward-line)
    (should (equal (plist-get (org-export-get-environment nil t) :title)
		   '("Subtree Title"))))
  :title
  '("subtree-title")
  ;; EXPORT_OPTIONS.
  (org-test-with-temp-text "#+OPTIONS: H:1
* Headline
  :PROPERTIES:
  :EXPORT_OPTIONS: H:2
  :END:
Paragraph"
    (forward-line)
    (should
     (= 2 (plist-get (org-export-get-environment nil t) :headline-levels))))
  ;; EXPORT_DATE.
  (org-test-with-temp-text "#+DATE: today
* Headline
  :PROPERTIES:
  :EXPORT_DATE: 29-03-2012
  :END:
Paragraph"
    (forward-line)
    (should (equal (plist-get (org-export-get-environment nil t) :date)
		   '("29-03-2012"))))
  ;; Export properties are case-insensitive.
  (org-test-with-temp-text "* Headline
  :PROPERTIES:
  :EXPORT_Date: 29-03-2012
  :END:
Paragraph"
    (should (equal (plist-get (org-export-get-environment nil t) :date)
		   '("29-03-2012")))))

(ert-deftest test-org-export/handle-options ()
  "Test if export options have an impact on output."
  ;; Test exclude tags.
  (org-test-with-temp-text "* Head1 :noexport:"
    (org-test-with-backend test
      (should
       (equal (org-export-as 'test nil nil nil '(:exclude-tags ("noexport")))
	      ""))))
  ;; Test include tags.
  (org-test-with-temp-text "
* Head1
* Head2
** Sub-Head2.1 :export:
*** Sub-Head2.1.1
* Head2"
    (org-test-with-backend test
      (should
       (equal
	"* Head2\n** Sub-Head2.1 :export:\n*** Sub-Head2.1.1\n"
	(let ((org-tags-column 0))
	  (org-export-as 'test nil nil nil '(:select-tags ("export"))))))))
  ;; Test mixing include tags and exclude tags.
  (org-test-with-temp-text "
* Head1 :export:
** Sub-Head1 :noexport:
** Sub-Head2
* Head2 :noexport:
** Sub-Head1 :export:"
    (org-test-with-backend test
      (should
       (string-match
	"\\* Head1[ \t]+:export:\n\\*\\* Sub-Head2\n"
	(org-export-as
	 'test nil nil nil
	 '(:select-tags ("export") :exclude-tags ("noexport")))))))
  ;; Ignore tasks.
  (let ((org-todo-keywords '((sequence "TODO" "DONE"))))
    (org-test-with-temp-text "* TODO Head1"
      (org-test-with-backend test
	(should (equal (org-export-as 'test nil nil nil '(:with-tasks nil))
		       "")))))
  (let ((org-todo-keywords '((sequence "TODO" "DONE"))))
    (org-test-with-temp-text "* TODO Head1"
      (org-test-with-backend test
	(should (equal (org-export-as 'test nil nil nil '(:with-tasks t))
		       "* TODO Head1\n")))))
  ;; Archived tree.
  (org-test-with-temp-text "* Head1 :archive:"
    (let ((org-archive-tag "archive"))
      (org-test-with-backend test
	(should
	 (equal (org-export-as 'test nil nil nil '(:with-archived-trees nil))
		"")))))
  (org-test-with-temp-text "* Head1 :archive:\nbody\n** Sub-head 2"
    (let ((org-archive-tag "archive"))
      (org-test-with-backend test
	(should
	 (string-match
	  "\\* Head1[ \t]+:archive:"
	  (org-export-as 'test nil nil nil
			 '(:with-archived-trees headline)))))))
  (org-test-with-temp-text "* Head1 :archive:"
    (let ((org-archive-tag "archive"))
      (org-test-with-backend test
	(should
	 (string-match
	  "\\`\\* Head1[ \t]+:archive:\n\\'"
	  (org-export-as 'test nil nil nil '(:with-archived-trees t)))))))
  ;; Drawers.
  (let ((org-drawers '("TEST")))
    (org-test-with-temp-text ":TEST:\ncontents\n:END:"
      (org-test-with-backend test
	(should (equal (org-export-as 'test nil nil nil '(:with-drawers nil))
		       ""))
	(should (equal (org-export-as 'test nil nil nil '(:with-drawers t))
		       ":TEST:\ncontents\n:END:\n")))))
  (let ((org-drawers '("FOO" "BAR")))
    (org-test-with-temp-text ":FOO:\nkeep\n:END:\n:BAR:\nremove\n:END:"
      (org-test-with-backend test
	(should
	 (equal (org-export-as 'test nil nil nil '(:with-drawers ("FOO")))
		":FOO:\nkeep\n:END:\n")))))
  ;; Timestamps.
  (org-test-with-temp-text "[2012-04-29 sun. 10:45]<2012-04-29 sun. 10:45>"
    (org-test-with-backend test
      (should
       (equal (org-export-as 'test nil nil nil '(:with-timestamps t))
	      "[2012-04-29 sun. 10:45]<2012-04-29 sun. 10:45>\n"))
      (should
       (equal (org-export-as 'test nil nil nil '(:with-timestamps nil)) ""))
      (should
       (equal (org-export-as 'test nil nil nil '(:with-timestamps active))
	      "<2012-04-29 sun. 10:45>\n"))
      (should
       (equal (org-export-as 'test nil nil nil '(:with-timestamps inactive))
	      "[2012-04-29 sun. 10:45]\n"))))
  ;; Clocks.
  (let ((org-clock-string "CLOCK:"))
    (org-test-with-temp-text "CLOCK: [2012-04-29 sun. 10:45]"
      (org-test-with-backend test
	(should
	 (equal (org-export-as 'test nil nil nil '(:with-clocks t))
		"CLOCK: [2012-04-29 sun. 10:45]\n"))
	(should
	 (equal (org-export-as 'test nil nil nil '(:with-clocks nil)) "")))))
  ;; Plannings.
  (let ((org-closed-string "CLOSED:"))
    (org-test-with-temp-text "CLOSED: [2012-04-29 sun. 10:45]"
      (org-test-with-backend test
	(should
	 (equal (org-export-as 'test nil nil nil '(:with-plannings t))
		"CLOSED: [2012-04-29 sun. 10:45]\n"))
	(should
	 (equal (org-export-as 'test nil nil nil '(:with-plannings nil))
		"")))))
  ;; Inlinetasks.
  (when (featurep 'org-inlinetask)
    (should
     (equal
      (let ((org-inlinetask-min-level 15))
	(org-test-with-temp-text "*************** Task"
	  (org-test-with-backend test
	    (org-export-as 'test nil nil nil '(:with-inlinetasks nil)))))
      ""))
    (should
     (equal
      (let ((org-inlinetask-min-level 15))
	(org-test-with-temp-text
	    "*************** Task\nContents\n*************** END"
	  (org-test-with-backend test
	    (org-export-as 'test nil nil nil '(:with-inlinetasks nil)))))
      "")))
  ;; Statistics cookies.
  (should
   (equal ""
	  (org-test-with-temp-text "[0/0]"
	    (org-test-with-backend test
	      (org-export-as
	       'test nil nil nil '(:with-statistics-cookies nil)))))))

(ert-deftest test-org-export/comment-tree ()
  "Test if export process ignores commented trees."
  (let ((org-comment-string "COMMENT"))
    (org-test-with-temp-text "* COMMENT Head1"
      (org-test-with-backend test
	(should (equal (org-export-as 'test) ""))))))

(ert-deftest test-org-export/export-scope ()
  "Test all export scopes."
  (org-test-with-temp-text "
* Head1
** Head2
text
*** Head3"
    (org-test-with-backend test
      ;; Subtree.
      (forward-line 3)
      (should (equal (org-export-as 'test 'subtree) "text\n*** Head3\n"))
      ;; Visible.
      (goto-char (point-min))
      (forward-line)
      (org-cycle)
      (should (equal (org-export-as 'test nil 'visible) "* Head1\n"))
      ;; Region.
      (goto-char (point-min))
      (forward-line 3)
      (transient-mark-mode 1)
      (push-mark (point) t t)
      (goto-char (point-at-eol))
      (should (equal (org-export-as 'test) "text\n"))))
  ;; Subtree with a code block calling another block outside.
  (should
   (equal ": 3\n"
	  (org-test-with-temp-text "
* Head1
#+BEGIN_SRC emacs-lisp :noweb yes :exports results
<<test>>
#+END_SRC
* Head2
#+NAME: test
#+BEGIN_SRC emacs-lisp
\(+ 1 2)
#+END_SRC"
	    (org-test-with-backend test
	      (forward-line 1)
	      (org-export-as 'test 'subtree)))))
  ;; Body only.
  (org-test-with-temp-text "Text"
    (org-test-with-backend test
      (plist-put
       (cdr (assq 'test org-export-registered-backends))
       :translate-alist
       (cons (cons 'template (lambda (body info) (format "BEGIN\n%sEND" body)))
	     (org-export-backend-translate-table 'test)))
      (should (equal (org-export-as 'test nil nil 'body-only) "Text\n"))
      (should (equal (org-export-as 'test) "BEGIN\nText\nEND")))))

(ert-deftest test-org-export/expand-include ()
  "Test file inclusion in an Org buffer."
  ;; Error when file isn't specified.
  (should-error
   (org-test-with-temp-text "#+INCLUDE: dummy.org"
     (org-export-expand-include-keyword)))
  ;; Full insertion with recursive inclusion.
  (org-test-with-temp-text
      (format "#+INCLUDE: \"%s/examples/include.org\"" org-test-dir)
    (org-export-expand-include-keyword)
    (should (equal (buffer-string)
		   "Small Org file with an include keyword.

#+BEGIN_SRC emacs-lisp :exports results\n(+ 2 1)\n#+END_SRC

Success!

* Heading
body\n")))
  ;; Localized insertion.
  (org-test-with-temp-text
      (format "#+INCLUDE: \"%s/examples/include.org\" :lines \"1-2\""
	      org-test-dir)
    (org-export-expand-include-keyword)
    (should (equal (buffer-string)
		   "Small Org file with an include keyword.\n")))
  ;; Insertion with constraints on headlines level.
  (org-test-with-temp-text
      (format
       "* Top heading\n#+INCLUDE: \"%s/examples/include.org\" :lines \"9-\""
       org-test-dir)
    (org-export-expand-include-keyword)
    (should (equal (buffer-string) "* Top heading\n** Heading\nbody\n")))
  ;; Inclusion within an example block.
  (org-test-with-temp-text
      (format "#+INCLUDE: \"%s/examples/include.org\" :lines \"1-2\" example"
	      org-test-dir)
    (org-export-expand-include-keyword)
    (should
     (equal
      (buffer-string)
      "#+BEGIN_EXAMPLE\nSmall Org file with an include keyword.\n#+END_EXAMPLE\n")))
  ;; Inclusion within a src-block.
  (org-test-with-temp-text
      (format
       "#+INCLUDE: \"%s/examples/include.org\" :lines \"4-5\" src emacs-lisp"
       org-test-dir)
    (org-export-expand-include-keyword)
    (should (equal (buffer-string)
		   "#+BEGIN_SRC emacs-lisp\n(+ 2 1)\n#+END_SRC\n"))))

(ert-deftest test-org-export/expand-macro ()
  "Test macro expansion in an Org buffer."
  ;; Standard macro expansion.
  (should
   (equal "#+MACRO: macro1 value\nvalue\n"
	  (org-test-with-temp-text "#+MACRO: macro1 value\n{{{macro1}}}"
	    (org-test-with-backend test (org-export-as 'test)))))
  ;; Expand specific macros.
  (should
   (equal "me 2012-03-29 me@here Title\n"
	  (org-test-with-temp-text
	      "
#+TITLE: Title
#+DATE: 2012-03-29
#+AUTHOR: me
#+EMAIL: me@here
{{{author}}} {{{date}}} {{{email}}} {{{title}}}"
	    (let ((output (org-test-with-backend test (org-export-as 'test))))
	      (substring output (string-match ".*\n\\'" output))))))
  ;; Expand specific macros when property contained a regular macro
  ;; already.
  (should
   (equal "value\n"
	  (org-test-with-temp-text "
#+MACRO: macro1 value
#+TITLE: {{{macro1}}}
{{{title}}}"
	    (let ((output (org-test-with-backend test (org-export-as 'test))))
	      (substring output (string-match ".*\n\\'" output))))))
  ;; Expand macros with templates in included files.
  (should
   (equal "success\n"
	  (org-test-with-temp-text
	      (format "#+INCLUDE: \"%s/examples/macro-templates.org\"
{{{included-macro}}}" org-test-dir)
	    (let ((output (org-test-with-backend test (org-export-as 'test))))
	      (substring output (string-match ".*\n\\'" output)))))))

(ert-deftest test-org-export/user-ignore-list ()
  "Test if `:ignore-list' accepts user input."
  (org-test-with-backend test
    (flet ((skip-note-head
	    (data backend info)
	    ;; Ignore headlines with the word "note" in their title.
	    (org-element-map
	     data 'headline
	     (lambda (headline)
	       (when (string-match "\\<note\\>"
				   (org-element-property :raw-value headline))
		 (org-export-ignore-element headline info)))
	     info)
	    data))
      ;; Install function in parse tree filters.
      (let ((org-export-filter-parse-tree-functions '(skip-note-head)))
	(org-test-with-temp-text "* Head1\n* Head2 (note)\n"
	  (should (equal (org-export-as 'test) "* Head1\n")))))))

(ert-deftest test-org-export/before-processing-hook ()
  "Test `org-export-before-processing-hook'."
  (should
   (equal
    "#+MACRO: mac val\nTest\n"
    (org-test-with-backend test
      (org-test-with-temp-text "#+MACRO: mac val\n{{{mac}}} Test"
	(let ((org-export-before-processing-hook
	       '((lambda (backend)
		   (while (re-search-forward "{{{" nil t)
		     (let ((object (org-element-context)))
		       (when (eq (org-element-type object) 'macro)
			 (delete-region
			  (org-element-property :begin object)
			  (org-element-property :end object)))))))))
	  (org-export-as 'test)))))))

(ert-deftest test-org-export/before-parsing-hook ()
  "Test `org-export-before-parsing-hook'."
  (should
   (equal "Body 1\nBody 2\n"
	  (org-test-with-backend test
	    (org-test-with-temp-text "* Headline 1\nBody 1\n* Headline 2\nBody 2"
	      (let ((org-export-before-parsing-hook
		     '((lambda (backend)
			 (org-map-entries
			  (lambda ()
			    (delete-region (point) (progn (forward-line) (point)))))))))
		(org-export-as 'test)))))))



;;; Affiliated Keywords

(ert-deftest test-org-export/read-attribute ()
  "Test `org-export-read-attribute' specifications."
  ;; Standard test.
  (should
   (equal
    (org-export-read-attribute
     :attr_html
     (org-test-with-temp-text "#+ATTR_HTML: :a 1 :b 2\nParagraph"
       (org-element-at-point)))
    '(:a 1 :b 2)))
  ;; Return nil on empty attribute.
  (should-not
   (org-export-read-attribute
    :attr_html
    (org-test-with-temp-text "Paragraph" (org-element-at-point)))))

(ert-deftest test-org-export/get-caption ()
  "Test `org-export-get-caption' specifications."
  ;; Without optional argument, return long caption
  (should
   (equal
    '("l")
    (org-test-with-temp-text "#+CAPTION[s]: l\nPara"
      (org-export-get-caption (org-element-at-point)))))
  ;; With optional argument, return short caption.
  (should
   (equal
    '("s")
    (org-test-with-temp-text "#+CAPTION[s]: l\nPara"
      (org-export-get-caption (org-element-at-point) t))))
  ;; Multiple lines are separated by white spaces.
  (should
   (equal
    '("a" " " "b")
    (org-test-with-temp-text "#+CAPTION: a\n#+CAPTION: b\nPara"
      (org-export-get-caption (org-element-at-point))))))



;;; Back-end Definition

(ert-deftest test-org-export/define-backend ()
  "Test back-end definition and accessors."
  ;; Translate table.
  (should
   (equal '((headline . my-headline-test))
	  (let (org-export-registered-backends)
	    (org-export-define-backend test ((headline . my-headline-test)))
	    (org-export-backend-translate-table 'test))))
  ;; Filters.
  (should
   (equal '((:filter-headline . my-filter))
	  (let (org-export-registered-backends)
	    (org-export-define-backend test
	      ((headline . my-headline-test))
	      :filters-alist ((:filter-headline . my-filter)))
	    (org-export-backend-filters 'test))))
  ;; Options.
  (should
   (equal '((:prop value))
	  (let (org-export-registered-backends)
	    (org-export-define-backend test
	      ((headline . my-headline-test))
	      :options-alist ((:prop value)))
	    (org-export-backend-options 'test))))
  ;; Menu.
  (should
   (equal '(?k "Test Export" test)
	  (let (org-export-registered-backends)
	    (org-export-define-backend test
	      ((headline . my-headline-test))
	      :menu-entry (?k "Test Export" test))
	    (org-export-backend-menu 'test))))
  ;; Export Blocks.
  (should
   (equal '(("TEST" . org-element-export-block-parser))
	  (let (org-export-registered-backends org-element-block-name-alist)
	    (org-export-define-backend test
	      ((headline . my-headline-test))
	      :export-block ("test"))
	    org-element-block-name-alist))))

(ert-deftest test-org-export/define-derived-backend ()
  "Test `org-export-define-derived-backend' specifications."
  ;; Error when parent back-end is not defined.
  (should-error
   (let (org-export-registered-backends)
     (org-export-define-derived-backend test parent)))
  ;; Append translation table to parent's.
  (should
   (equal '((:headline . test) (:headline . parent))
	  (let (org-export-registered-backends)
	    (org-export-define-backend parent ((:headline . parent)))
	    (org-export-define-derived-backend test parent
	      :translate-alist ((:headline . test)))
	    (org-export-backend-translate-table 'test)))))

(ert-deftest test-org-export/derived-backend-p ()
  "Test `org-export-derived-backend-p' specifications."
  ;; Non-nil with direct match.
  (should
   (let (org-export-registered-backends)
     (org-export-define-backend test ((headline . test)))
     (org-export-derived-backend-p 'test 'test)))
  (should
   (let (org-export-registered-backends)
     (org-export-define-backend test ((headline . test)))
     (org-export-define-derived-backend test2 test)
     (org-export-derived-backend-p 'test2 'test2)))
  ;; Non-nil with a direct parent.
  (should
   (let (org-export-registered-backends)
     (org-export-define-backend test ((headline . test)))
     (org-export-define-derived-backend test2 test)
     (org-export-derived-backend-p 'test2 'test)))
  ;; Non-nil with an indirect parent.
  (should
   (let (org-export-registered-backends)
     (org-export-define-backend test ((headline . test)))
     (org-export-define-derived-backend test2 test)
     (org-export-define-derived-backend test3 test2)
     (org-export-derived-backend-p 'test3 'test)))
  ;; Nil otherwise.
  (should-not
   (let (org-export-registered-backends)
     (org-export-define-backend test ((headline . test)))
     (org-export-define-backend test2 ((headline . test2)))
     (org-export-derived-backend-p 'test2 'test)))
  (should-not
   (let (org-export-registered-backends)
     (org-export-define-backend test ((headline . test)))
     (org-export-define-backend test2 ((headline . test2)))
     (org-export-define-derived-backend test3 test2)
     (org-export-derived-backend-p 'test3 'test))))



;;; Export Snippets

(ert-deftest test-org-export/export-snippet ()
  "Test export snippets transcoding."
  (org-test-with-temp-text "@@test:A@@@@t:B@@"
    (org-test-with-backend test
      (plist-put
       (cdr (assq 'test org-export-registered-backends))
       :translate-alist
       (cons (cons 'export-snippet
		   (lambda (snippet contents info)
		     (when (eq (org-export-snippet-backend snippet) 'test)
		       (org-element-property :value snippet))))
	     (org-export-backend-translate-table 'test)))
      (let ((org-export-snippet-translation-alist nil))
	(should (equal (org-export-as 'test) "A\n")))
      (let ((org-export-snippet-translation-alist '(("t" . "test"))))
	(should (equal (org-export-as 'test) "AB\n"))))))



;;; Footnotes

(ert-deftest test-org-export/footnotes ()
  "Test footnotes specifications."
  (let ((org-footnote-section nil)
	(org-export-with-footnotes t))
    ;; 1. Read every type of footnote.
    (should
     (equal
      '((1 . "A\n") (2 . "B") (3 . "C") (4 . "D"))
      (org-test-with-parsed-data
       "Text[fn:1] [1] [fn:label:C] [fn::D]\n\n[fn:1] A\n\n[1] B"
       (org-element-map
	tree 'footnote-reference
	(lambda (ref)
	  (let ((def (org-export-get-footnote-definition ref info)))
	    (cons (org-export-get-footnote-number ref info)
		  (if (eq (org-element-property :type ref) 'inline) (car def)
		    (car (org-element-contents
			  (car (org-element-contents def))))))))
	info))))
    ;; 2. Test nested footnotes order.
    (org-test-with-parsed-data
     "Text[fn:1:A[fn:2]] [fn:3].\n\n[fn:2] B [fn:3] [fn::D].\n\n[fn:3] C."
     (should
      (equal
       '((1 . "fn:1") (2 . "fn:2") (3 . "fn:3") (4))
       (org-element-map
	tree 'footnote-reference
	(lambda (ref)
	  (when (org-export-footnote-first-reference-p ref info)
	    (cons (org-export-get-footnote-number ref info)
		  (org-element-property :label ref))))
	info))))
    ;; 3. Test nested footnote in invisible definitions.
    (org-test-with-temp-text "Text[1]\n\n[1] B [2]\n\n[2] C."
      ;; Hide definitions.
      (narrow-to-region (point) (point-at-eol))
      (let* ((tree (org-element-parse-buffer))
	     (info (org-combine-plists
		    `(:parse-tree ,tree)
		    (org-export-collect-tree-properties
		     tree (org-export-get-environment)))))
	;; Both footnotes should be seen.
	(should
	 (= (length (org-export-collect-footnote-definitions tree info)) 2))))
    ;; 4. Test footnotes definitions collection.
    (org-test-with-parsed-data "Text[fn:1:A[fn:2]] [fn:3].

\[fn:2] B [fn:3] [fn::D].

\[fn:3] C."
			       (should (= (length (org-export-collect-footnote-definitions tree info))
					  4)))
    ;; 5. Test export of footnotes defined outside parsing scope.
    (org-test-with-temp-text "[fn:1] Out of scope
* Title
Paragraph[fn:1]"
      (org-test-with-backend test
	(plist-put
	 (cdr (assq 'test org-export-registered-backends))
	 :translate-alist
	 (cons (cons 'footnote-reference
		     (lambda (fn contents info)
		       (org-element-interpret-data
			(org-export-get-footnote-definition fn info))))
	       (org-export-backend-translate-table 'test)))
	(forward-line)
	(should (equal "ParagraphOut of scope\n"
		       (org-export-as 'test 'subtree)))))))



;;; Headlines and Inlinetasks

(ert-deftest test-org-export/get-relative-level ()
  "Test `org-export-get-relative-level' specifications."
  ;; Standard test.
  (should
   (equal '(1 2)
	  (let ((org-odd-levels-only nil))
	    (org-test-with-parsed-data "* Headline 1\n** Headline 2"
	      (org-element-map
	       tree 'headline
	       (lambda (h) (org-export-get-relative-level h info))
	       info)))))
  ;; Missing levels
  (should
   (equal '(1 3)
	  (let ((org-odd-levels-only nil))
	    (org-test-with-parsed-data "** Headline 1\n**** Headline 2"
	      (org-element-map
	       tree 'headline
	       (lambda (h) (org-export-get-relative-level h info))
	       info))))))

(ert-deftest test-org-export/low-level-p ()
  "Test `org-export-low-level-p' specifications."
  (should
   (equal
    '(no yes)
    (let ((org-odd-levels-only nil))
      (org-test-with-parsed-data "* Headline 1\n** Headline 2"
	(org-element-map
	 tree 'headline
	 (lambda (h) (if (org-export-low-level-p h info) 'yes 'no))
	 (plist-put info :headline-levels 1)))))))

(ert-deftest test-org-export/get-headline-number ()
  "Test `org-export-get-headline-number' specifications."
  ;; Standard test.
  (should
   (equal
    '((1) (1 1))
    (let ((org-odd-levels-only nil))
      (org-test-with-parsed-data "* Headline 1\n** Headline 2"
	(org-element-map
	 tree 'headline
	 (lambda (h) (org-export-get-headline-number h info))
	 info)))))
  ;; Missing levels are replaced with 0.
  (should
   (equal
    '((1) (1 0 1))
    (let ((org-odd-levels-only nil))
      (org-test-with-parsed-data "* Headline 1\n*** Headline 2"
	(org-element-map
	 tree 'headline
	 (lambda (h) (org-export-get-headline-number h info))
	 info))))))

(ert-deftest test-org-export/numbered-headline-p ()
  "Test `org-export-numbered-headline-p' specifications."
  ;; If `:section-numbers' is nil, never number headlines.
  (should-not
   (org-test-with-parsed-data "* Headline"
     (org-element-map
      tree 'headline
      (lambda (h) (org-export-numbered-headline-p h info))
      (plist-put info :section-numbers nil))))
  ;; If `:section-numbers' is a number, only number headlines with
  ;; a level greater that it.
  (should
   (equal
    '(yes no)
    (org-test-with-parsed-data "* Headline 1\n** Headline 2"
      (org-element-map
       tree 'headline
       (lambda (h) (if (org-export-numbered-headline-p h info) 'yes 'no))
       (plist-put info :section-numbers 1)))))
  ;; Otherwise, headlines are always numbered.
  (should
   (org-test-with-parsed-data "* Headline"
     (org-element-map
      tree 'headline
      (lambda (h) (org-export-numbered-headline-p h info))
      (plist-put info :section-numbers t)))))

(ert-deftest test-org-export/number-to-roman ()
  "Test `org-export-number-to-roman' specifications."
  ;; If number is negative, return it as a string.
  (should (equal (org-export-number-to-roman -1) "-1"))
  ;; Otherwise, return it as a roman number.
  (should (equal (org-export-number-to-roman 1449) "MCDXLIX")))

(ert-deftest test-org-export/get-tags ()
  "Test `org-export-get-tags' specifications."
  (let ((org-export-exclude-tags '("noexport"))
	(org-export-select-tags '("export")))
    ;; Standard test: tags which are not a select tag, an exclude tag,
    ;; or specified as optional argument shouldn't be ignored.
    (should
     (org-test-with-parsed-data "* Headline :tag:"
       (org-export-get-tags (org-element-map tree 'headline 'identity info t)
			    info)))
    ;; Exclude tags are removed.
    (should-not
     (org-test-with-parsed-data "* Headline :noexport:"
       (org-export-get-tags (org-element-map tree 'headline 'identity info t)
			    info)))
    ;; Select tags are removed.
    (should-not
     (org-test-with-parsed-data "* Headline :export:"
       (org-export-get-tags (org-element-map tree 'headline 'identity info t)
			    info)))
    (should
     (equal
      '("tag")
      (org-test-with-parsed-data "* Headline :tag:export:"
	(org-export-get-tags (org-element-map tree 'headline 'identity info t)
			     info))))
    ;; Tags provided in the optional argument are also ignored.
    (should-not
     (org-test-with-parsed-data "* Headline :ignore:"
       (org-export-get-tags (org-element-map tree 'headline 'identity info t)
			    info '("ignore"))))
    ;; Allow tag inheritance.
    (should
     (equal
      '(("tag") ("tag"))
      (org-test-with-parsed-data "* Headline :tag:\n** Sub-heading"
	(org-element-map
	 tree 'headline
	 (lambda (hl) (org-export-get-tags hl info nil t)) info))))
    ;; Tag inheritance checks FILETAGS keywords.
    (should
     (equal
      '(("a" "b" "tag"))
      (org-test-with-parsed-data "#+FILETAGS: :a:b:\n* Headline :tag:"
	(org-element-map
	 tree 'headline
	 (lambda (hl) (org-export-get-tags hl info nil t)) info))))))

(ert-deftest test-org-export/get-node-property ()
  "Test`org-export-get-node-property' specifications."
  ;; Standard test.
  (should
   (equal "value"
	  (org-test-with-parsed-data "* Headline
  :PROPERTIES:
  :prop:     value
  :END:"
	    (org-export-get-node-property
	     :prop (org-element-map tree 'headline 'identity nil t)))))
  ;; Test inheritance.
  (should
   (equal "value"
	  (org-test-with-parsed-data "* Parent
  :PROPERTIES:
  :prop:     value
  :END:
** Headline
   Paragraph"
	    (org-export-get-node-property
	     :prop (org-element-map tree 'paragraph 'identity nil t) t))))
  ;; Cannot return a value before the first headline.
  (should-not
   (org-test-with-parsed-data "Paragraph
* Headline
  :PROPERTIES:
  :prop:     value
  :END:"
     (org-export-get-node-property
      :prop (org-element-map tree 'paragraph 'identity nil t)))))

(ert-deftest test-org-export/get-category ()
  "Test `org-export-get-category' specifications."
  ;; Standard test.
  (should
   (equal "value"
	  (org-test-with-parsed-data "* Headline
  :PROPERTIES:
  :CATEGORY:     value
  :END:"
	    (org-export-get-category
	     (org-element-map tree 'headline 'identity nil t) info))))
  ;; Test inheritance from a parent headline.
  (should
   (equal '("value" "value")
	  (org-test-with-parsed-data "* Headline1
  :PROPERTIES:
  :CATEGORY:     value
  :END:
** Headline2"
	    (org-element-map
	     tree 'headline
	     (lambda (hl) (org-export-get-category hl info)) info))))
  ;; Test inheritance from #+CATEGORY keyword
  (should
   (equal "value"
	  (org-test-with-parsed-data "#+CATEGORY: value
* Headline"
	    (org-export-get-category
	     (org-element-map tree 'headline 'identity nil t) info))))
  ;; Test inheritance from file name.
  (should
   (equal "test"
	  (org-test-with-parsed-data "* Headline"
	    (let ((info (plist-put info :input-file "~/test.org")))
	      (org-export-get-category
	       (org-element-map tree 'headline 'identity nil t) info)))))
  ;; Fall-back value.
  (should
   (equal "???"
	  (org-test-with-parsed-data "* Headline"
	    (org-export-get-category
	     (org-element-map tree 'headline 'identity nil t) info)))))

(ert-deftest test-org-export/first-sibling-p ()
  "Test `org-export-first-sibling-p' specifications."
  ;; Standard test.
  (should
   (equal
    '(yes yes no)
    (org-test-with-parsed-data "* Headline\n** Headline 2\n** Headline 3"
      (org-element-map
       tree 'headline
       (lambda (h) (if (org-export-first-sibling-p h info) 'yes 'no))
       info))))
  ;; Ignore headlines not exported.
  (should
   (equal
    '(yes)
    (let ((org-export-exclude-tags '("ignore")))
      (org-test-with-parsed-data "* Headline :ignore:\n* Headline 2"
	(org-element-map
	 tree 'headline
	 (lambda (h) (if (org-export-first-sibling-p h info) 'yes 'no))
	 info))))))

(ert-deftest test-org-export/last-sibling-p ()
  "Test `org-export-last-sibling-p' specifications."
  ;; Standard test.
  (should
   (equal
    '(yes no yes)
    (org-test-with-parsed-data "* Headline\n** Headline 2\n** Headline 3"
      (org-element-map
       tree 'headline
       (lambda (h) (if (org-export-last-sibling-p h info) 'yes 'no))
       info))))
  ;; Ignore headlines not exported.
  (should
   (equal
    '(yes)
    (let ((org-export-exclude-tags '("ignore")))
      (org-test-with-parsed-data "* Headline\n* Headline 2 :ignore:"
	(org-element-map
	 tree 'headline
	 (lambda (h) (if (org-export-last-sibling-p h info) 'yes 'no))
	 info))))))



;;; Links

(ert-deftest test-org-export/get-coderef-format ()
  "Test `org-export-get-coderef-format' specifications."
  ;; A link without description returns "%s"
  (should (equal (org-export-get-coderef-format "(ref:line)" nil)
		 "%s"))
  ;; Return "%s" when path is matched within description.
  (should (equal (org-export-get-coderef-format "path" "desc (path)")
		 "desc %s"))
  ;; Otherwise return description.
  (should (equal (org-export-get-coderef-format "path" "desc")
		 "desc")))

(ert-deftest test-org-export/inline-image-p ()
  "Test `org-export-inline-image-p' specifications."
  (should
   (org-export-inline-image-p
    (org-test-with-temp-text "[[#id]]"
      (org-element-map
       (org-element-parse-buffer) 'link 'identity nil t))
    '(("custom-id" . "id")))))

(ert-deftest test-org-export/fuzzy-link ()
  "Test fuzzy links specifications."
  ;; 1. Links to invisible (keyword) targets should be ignored.
  (org-test-with-parsed-data
      "Paragraph.\n#+TARGET: Test\n[[Test]]"
    (should-not
     (org-element-map
      tree 'link
      (lambda (link)
	(org-export-get-ordinal
	 (org-export-resolve-fuzzy-link link info) info)) info)))
  ;; 2. Link to an headline should return headline's number.
  (org-test-with-parsed-data
      "Paragraph.\n* Head1\n* Head2\n* Head3\n[[Head2]]"
    (should
     ;; Note: Headline's number is in fact a list of numbers.
     (equal '(2)
	    (org-element-map
	     tree 'link
	     (lambda (link)
	       (org-export-get-ordinal
		(org-export-resolve-fuzzy-link link info) info)) info t))))
  ;; 3. Link to a target in an item should return item's number.
  (org-test-with-parsed-data
      "- Item1\n  - Item11\n  - <<test>>Item12\n- Item2\n\n\n[[test]]"
    (should
     ;; Note: Item's number is in fact a list of numbers.
     (equal '(1 2)
	    (org-element-map
	     tree 'link
	     (lambda (link)
	       (org-export-get-ordinal
		(org-export-resolve-fuzzy-link link info) info)) info t))))
  ;; 4. Link to a target in a footnote should return footnote's
  ;;    number.
  (org-test-with-parsed-data "
Paragraph[1][2][fn:lbl3:C<<target>>][[test]][[target]]\n[1] A\n\n[2] <<test>>B"
    (should
     (equal '(2 3)
	    (org-element-map
	     tree 'link
	     (lambda (link)
	       (org-export-get-ordinal
		(org-export-resolve-fuzzy-link link info) info)) info))))
  ;; 5. Link to a named element should return sequence number of that
  ;;    element.
  (org-test-with-parsed-data
      "#+NAME: tbl1\n|1|2|\n#+NAME: tbl2\n|3|4|\n#+NAME: tbl3\n|5|6|\n[[tbl2]]"
    (should
     (= 2
	(org-element-map
	 tree 'link
	 (lambda (link)
	   (org-export-get-ordinal
	    (org-export-resolve-fuzzy-link link info) info)) info t))))
  ;; 6. Link to a target not within an item, a table, a footnote
  ;;    reference or definition should return section number.
  (org-test-with-parsed-data
      "* Head1\n* Head2\nParagraph<<target>>\n* Head3\n[[target]]"
    (should
     (equal '(2)
	    (org-element-map
	     tree 'link
	     (lambda (link)
	       (org-export-get-ordinal
		(org-export-resolve-fuzzy-link link info) info)) info t)))))

(ert-deftest test-org-export/resolve-coderef ()
  "Test `org-export-resolve-coderef' specifications."
  (let ((org-coderef-label-format "(ref:%s)"))
    ;; 1. A link to a "-n -k -r" block returns line number.
    (org-test-with-parsed-data
	"#+BEGIN_EXAMPLE -n -k -r\nText (ref:coderef)\n#+END_EXAMPLE"
      (should (= (org-export-resolve-coderef "coderef" info) 1)))
    (org-test-with-parsed-data
	"#+BEGIN_SRC emacs-lisp -n -k -r\n(+ 1 1) (ref:coderef)\n#+END_SRC"
      (should (= (org-export-resolve-coderef "coderef" info) 1)))
    ;; 2. A link to a "-n -r" block returns line number.
    (org-test-with-parsed-data
	"#+BEGIN_EXAMPLE -n -r\nText (ref:coderef)\n#+END_EXAMPLE"
      (should (= (org-export-resolve-coderef "coderef" info) 1)))
    (org-test-with-parsed-data
	"#+BEGIN_SRC emacs-lisp -n -r\n(+ 1 1) (ref:coderef)\n#+END_SRC"
      (should (= (org-export-resolve-coderef "coderef" info) 1)))
    ;; 3. A link to a "-n" block returns coderef.
    (org-test-with-parsed-data
	"#+BEGIN_SRC emacs-lisp -n\n(+ 1 1) (ref:coderef)\n#+END_SRC"
      (should (equal (org-export-resolve-coderef "coderef" info) "coderef")))
    (org-test-with-parsed-data
	"#+BEGIN_EXAMPLE -n\nText (ref:coderef)\n#+END_EXAMPLE"
      (should (equal (org-export-resolve-coderef "coderef" info) "coderef")))
    ;; 4. A link to a "-r" block returns line number.
    (org-test-with-parsed-data
	"#+BEGIN_SRC emacs-lisp -r\n(+ 1 1) (ref:coderef)\n#+END_SRC"
      (should (= (org-export-resolve-coderef "coderef" info) 1)))
    (org-test-with-parsed-data
	"#+BEGIN_EXAMPLE -r\nText (ref:coderef)\n#+END_EXAMPLE"
      (should (= (org-export-resolve-coderef "coderef" info) 1)))
    ;; 5. A link to a block without a switch returns coderef.
    (org-test-with-parsed-data
	"#+BEGIN_SRC emacs-lisp\n(+ 1 1) (ref:coderef)\n#+END_SRC"
      (should (equal (org-export-resolve-coderef "coderef" info) "coderef")))
    (org-test-with-parsed-data
	"#+BEGIN_EXAMPLE\nText (ref:coderef)\n#+END_EXAMPLE"
      (should (equal (org-export-resolve-coderef "coderef" info) "coderef")))
    ;; 6. Correctly handle continued line numbers.  A "+n" switch
    ;;    should resume numbering from previous block with numbered
    ;;    lines, ignoring blocks not numbering lines in the process.
    ;;    A "-n" switch resets count.
    (org-test-with-parsed-data "
#+BEGIN_EXAMPLE -n
Text.
#+END_EXAMPLE

#+BEGIN_SRC emacs-lisp
\(- 1 1)
#+END_SRC

#+BEGIN_SRC emacs-lisp +n -r
\(+ 1 1) (ref:addition)
#+END_SRC

#+BEGIN_EXAMPLE -n -r
Another text. (ref:text)
#+END_EXAMPLE"
      (should (= (org-export-resolve-coderef "addition" info) 2))
      (should (= (org-export-resolve-coderef "text" info) 1)))
    ;; 7. Recognize coderef with user-specified syntax.
    (org-test-with-parsed-data
	"#+BEGIN_EXAMPLE -l \"[ref:%s]\"\nText. [ref:text]\n#+END_EXAMPLE"
      (should (equal (org-export-resolve-coderef "text" info) "text")))))

(ert-deftest test-org-export/resolve-fuzzy-link ()
  "Test `org-export-resolve-fuzzy-link' specifications."
  ;; 1. Match target objects.
  (org-test-with-parsed-data "<<target>> [[target]]"
    (should
     (org-export-resolve-fuzzy-link
      (org-element-map tree 'link 'identity info t) info)))
  ;; 2. Match target elements.
  (org-test-with-parsed-data "#+TARGET: target\n[[target]]"
    (should
     (org-export-resolve-fuzzy-link
      (org-element-map tree 'link 'identity info t) info)))
  ;; 3. Match named elements.
  (org-test-with-parsed-data "#+NAME: target\nParagraph\n\n[[target]]"
    (should
     (org-export-resolve-fuzzy-link
      (org-element-map tree 'link 'identity info t) info)))
  ;; 4. Match exact headline's name.
  (org-test-with-parsed-data "* My headline\n[[My headline]]"
    (should
     (org-export-resolve-fuzzy-link
      (org-element-map tree 'link 'identity info t) info)))
  ;; 5. Targets objects have priority over named elements and headline
  ;;    titles.
  (org-test-with-parsed-data
      "* target\n#+NAME: target\n<<target>>\n\n[[target]]"
    (should
     (eq 'target
	 (org-element-type
	  (org-export-resolve-fuzzy-link
	   (org-element-map tree 'link 'identity info t) info)))))
  ;; 6. Named elements have priority over headline titles.
  (org-test-with-parsed-data
      "* target\n#+NAME: target\nParagraph\n\n[[target]]"
    (should
     (eq 'paragraph
	 (org-element-type
	  (org-export-resolve-fuzzy-link
	   (org-element-map tree 'link 'identity info t) info)))))
  ;; 7. If link's path starts with a "*", only match headline titles,
  ;;    though.
  (org-test-with-parsed-data
      "* target\n#+NAME: target\n<<target>>\n\n[[*target]]"
    (should
     (eq 'headline
	 (org-element-type
	  (org-export-resolve-fuzzy-link
	   (org-element-map tree 'link 'identity info t) info)))))
  ;; 8. Return nil if no match.
  (org-test-with-parsed-data "[[target]]"
    (should-not
     (org-export-resolve-fuzzy-link
      (org-element-map tree 'link 'identity info t) info))))

(ert-deftest test-org-export/resolve-id-link ()
  "Test `org-export-resolve-id-link' specifications."
  ;; 1. Regular test for custom-id link.
  (org-test-with-parsed-data "* Headline1
:PROPERTIES:
:CUSTOM-ID: test
:END:
* Headline 2
\[[#test]]"
    (should
     (org-export-resolve-id-link
      (org-element-map tree 'link 'identity info t) info)))
  ;; 2. Failing test for custom-id link.
  (org-test-with-parsed-data "* Headline1
:PROPERTIES:
:CUSTOM-ID: test
:END:
* Headline 2
\[[#no-match]]"
    (should-not
     (org-export-resolve-id-link
      (org-element-map tree 'link 'identity info t) info)))
  ;; 3. Test for internal id target.
  (org-test-with-parsed-data "* Headline1
:PROPERTIES:
:ID: aaaa
:END:
* Headline 2
\[[id:aaaa]]"
    (should
     (org-export-resolve-id-link
      (org-element-map tree 'link 'identity info t) info)))
  ;; 4. Test for external id target.
  (org-test-with-parsed-data "[[id:aaaa]]"
    (should
     (org-export-resolve-id-link
      (org-element-map tree 'link 'identity info t)
      (org-combine-plists info '(:id-alist (("aaaa" . "external-file"))))))))

(ert-deftest test-org-export/resolve-radio-link ()
  "Test `org-export-resolve-radio-link' specifications."
  ;; Standard test.
  (org-test-with-temp-text "<<<radio>>> radio"
    (org-update-radio-target-regexp)
    (should
     (let* ((tree (org-element-parse-buffer))
	    (info `(:parse-tree ,tree)))
       (org-export-resolve-radio-link
	(org-element-map tree 'link 'identity info t)
	info))))
  ;; Radio target with objects.
  (org-test-with-temp-text "<<<radio \\alpha>>> radio \\alpha"
    (org-update-radio-target-regexp)
    (should
     (let* ((tree (org-element-parse-buffer))
	    (info `(:parse-tree ,tree)))
       (org-export-resolve-radio-link
	(org-element-map tree 'link 'identity info t)
	info)))))



;;; Src-block and example-block

(ert-deftest test-org-export/unravel-code ()
  "Test `org-export-unravel-code' function."
  (let ((org-coderef-label-format "(ref:%s)"))
    ;; 1. Code without reference.
    (org-test-with-temp-text "#+BEGIN_EXAMPLE\n(+ 1 1)\n#+END_EXAMPLE"
      (should (equal (org-export-unravel-code (org-element-at-point))
		     '("(+ 1 1)\n"))))
    ;; 2. Code with reference.
    (org-test-with-temp-text
	"#+BEGIN_EXAMPLE\n(+ 1 1) (ref:test)\n#+END_EXAMPLE"
      (should (equal (org-export-unravel-code (org-element-at-point))
		     '("(+ 1 1)\n" (1 . "test")))))
    ;; 3. Code with user-defined reference.
    (org-test-with-temp-text
	"#+BEGIN_EXAMPLE -l \"[ref:%s]\"\n(+ 1 1) [ref:test]\n#+END_EXAMPLE"
      (should (equal (org-export-unravel-code (org-element-at-point))
		     '("(+ 1 1)\n" (1 . "test")))))
    ;; 4. Code references keys are relative to the current block.
    (org-test-with-temp-text "
#+BEGIN_EXAMPLE -n
\(+ 1 1)
#+END_EXAMPLE
#+BEGIN_EXAMPLE +n
\(+ 2 2)
\(+ 3 3) (ref:one)
#+END_EXAMPLE"
      (goto-line 5)
      (should (equal (org-export-unravel-code (org-element-at-point))
		     '("(+ 2 2)\n(+ 3 3)\n" (2 . "one")))))))



;;; Smart Quotes

(ert-deftest test-org-export/activate-smart-quotes ()
  "Test `org-export-activate-smart-quotes' specifications."
  ;; Opening double quotes: standard test.
  (should
   (equal
    '("some &ldquo;paragraph")
    (let ((org-export-default-language "en"))
      (org-test-with-parsed-data "some \"paragraph"
	(org-element-map
	 tree 'plain-text
	 (lambda (s) (org-export-activate-smart-quotes s :html info))
	 info)))))
  ;; Opening quotes: at the beginning of a paragraph.
  (should
   (equal
    '("&ldquo;begin")
    (let ((org-export-default-language "en"))
      (org-test-with-parsed-data "\"begin"
	(org-element-map
	 tree 'plain-text
	 (lambda (s) (org-export-activate-smart-quotes s :html info))
	 info)))))
  ;; Opening quotes: after an object.
  (should
   (equal
    '("&ldquo;begin")
    (let ((org-export-default-language "en"))
      (org-test-with-parsed-data "=verb= \"begin"
	(org-element-map
	 tree 'plain-text
	 (lambda (s) (org-export-activate-smart-quotes s :html info))
	 info)))))
  ;; Closing quotes: standard test.
  (should
   (equal
    '("some&rdquo; paragraph")
    (let ((org-export-default-language "en"))
      (org-test-with-parsed-data "some\" paragraph"
	(org-element-map
	 tree 'plain-text
	 (lambda (s) (org-export-activate-smart-quotes s :html info))
	 info)))))
  ;; Closing quotes: at the end of a paragraph.
  (should
   (equal
    '("end&rdquo;")
    (let ((org-export-default-language "en"))
      (org-test-with-parsed-data "end\""
	(org-element-map
	 tree 'plain-text
	 (lambda (s) (org-export-activate-smart-quotes s :html info))
	 info)))))
  ;; Apostrophe: standard test.
  (should
   (equal
    '("It shouldn&rsquo;t fail")
    (let ((org-export-default-language "en"))
      (org-test-with-parsed-data "It shouldn't fail"
	(org-element-map
	 tree 'plain-text
	 (lambda (s) (org-export-activate-smart-quotes s :html info))
	 info)))))
  ;; Apostrophe: before an object.
  (should
   (equal
    '("a&rsquo;")
    (let ((org-export-default-language "en"))
      (org-test-with-parsed-data "a'=b="
	(org-element-map
	 tree 'plain-text
	 (lambda (s) (org-export-activate-smart-quotes s :html info))
	 info)))))
  ;; Apostrophe: after an object.
  (should
   (equal
    '("&rsquo;s")
    (let ((org-export-default-language "en"))
      (org-test-with-parsed-data "=code='s"
	(org-element-map
	 tree 'plain-text
	 (lambda (s) (org-export-activate-smart-quotes s :html info))
	 info)))))
  ;; Special case: isolated quotes.
  (should
   (equal '("&ldquo;" "&rdquo;")
	  (let ((org-export-default-language "en"))
	    (org-test-with-parsed-data "\"$x$\""
	      (org-element-map
	       tree 'plain-text
	       (lambda (s) (org-export-activate-smart-quotes s :html info))
	       info)))))
  ;; Smart quotes in secondary strings.
  (should
   (equal '("&ldquo;" "&rdquo;")
	  (let ((org-export-default-language "en"))
	    (org-test-with-parsed-data "* \"$x$\""
	      (org-element-map
	       tree 'plain-text
	       (lambda (s) (org-export-activate-smart-quotes s :html info))
	       info)))))
  ;; Smart quotes in document keywords.
  (should
   (equal '("&ldquo;" "&rdquo;")
	  (let ((org-export-default-language "en"))
	    (org-test-with-parsed-data "#+TITLE: \"$x$\""
	      (org-element-map
	       (plist-get info :title) 'plain-text
	       (lambda (s) (org-export-activate-smart-quotes s :html info))
	       info)))))
  ;; Smart quotes in parsed affiliated keywords.
  (should
   (equal '("&ldquo;" "&rdquo;" "Paragraph")
	  (let ((org-export-default-language "en"))
	    (org-test-with-parsed-data "#+CAPTION: \"$x$\"\nParagraph"
	      (org-element-map
	       tree 'plain-text
	       (lambda (s) (org-export-activate-smart-quotes s :html info))
	       info nil nil t))))))



;;; Tables

(ert-deftest test-org-export/special-column ()
  "Test if the table's special column is properly recognized."
  ;; 1. First column is special if it contains only a special marking
  ;;    characters or empty cells.
  (org-test-with-temp-text "
| ! | 1 |
|   | 2 |"
    (should
     (org-export-table-has-special-column-p
      (org-element-map
       (org-element-parse-buffer) 'table 'identity nil 'first-match))))
  ;; 2. If the column contains anything else, it isn't special.
  (org-test-with-temp-text "
| ! | 1 |
| b | 2 |"
    (should-not
     (org-export-table-has-special-column-p
      (org-element-map
       (org-element-parse-buffer) 'table 'identity nil 'first-match))))
  ;; 3. Special marking characters are "#", "^", "*", "_", "/", "$"
  ;;    and "!".
  (org-test-with-temp-text "
| # | 1 |
| ^ | 2 |
| * | 3 |
| _ | 4 |
| / | 5 |
| $ | 6 |
| ! | 7 |"
    (should
     (org-export-table-has-special-column-p
      (org-element-map
       (org-element-parse-buffer) 'table 'identity nil 'first-match))))
  ;; 4. A first column with only empty cells isn't considered as
  ;;    special.
  (org-test-with-temp-text "
|   | 1 |
|   | 2 |"
    (should-not
     (org-export-table-has-special-column-p
      (org-element-map
       (org-element-parse-buffer) 'table 'identity nil 'first-match)))))

(ert-deftest test-org-export/table-row-is-special-p ()
  "Test `org-export-table-row-is-special-p' specifications."
  ;; 1. A row is special if it has a special marking character in the
  ;;    special column.
  (org-test-with-parsed-data "| ! | 1 |"
    (should
     (org-export-table-row-is-special-p
      (org-element-map tree 'table-row 'identity nil 'first-match) info)))
  ;; 2. A row is special when its first field is "/"
  (org-test-with-parsed-data "
| / | 1 |
| a | b |"
    (should
     (org-export-table-row-is-special-p
      (org-element-map tree 'table-row 'identity nil 'first-match) info)))
  ;; 3. A row only containing alignment cookies is also considered as
  ;;    special.
  (org-test-with-parsed-data "| <5> |   | <l> | <l22> |"
    (should
     (org-export-table-row-is-special-p
      (org-element-map tree 'table-row 'identity nil 'first-match) info)))
  ;; 4. Everything else isn't considered as special.
  (org-test-with-parsed-data "| \alpha |   | c |"
    (should-not
     (org-export-table-row-is-special-p
      (org-element-map tree 'table-row 'identity nil 'first-match) info)))
  ;; 5. Table's rules are never considered as special rows.
  (org-test-with-parsed-data "|---+---|"
    (should-not
     (org-export-table-row-is-special-p
      (org-element-map tree 'table-row 'identity nil 'first-match) info))))

(ert-deftest test-org-export/has-header-p ()
  "Test `org-export-table-has-header-p' specifications."
  ;; 1. With an header.
  (org-test-with-parsed-data "
| a | b |
|---+---|
| c | d |"
    (should
     (org-export-table-has-header-p
      (org-element-map tree 'table 'identity info 'first-match)
      info)))
  ;; 2. Without an header.
  (org-test-with-parsed-data "
| a | b |
| c | d |"
    (should-not
     (org-export-table-has-header-p
      (org-element-map tree 'table 'identity info 'first-match)
      info)))
  ;; 3. Don't get fooled with starting and ending rules.
  (org-test-with-parsed-data "
|---+---|
| a | b |
| c | d |
|---+---|"
    (should-not
     (org-export-table-has-header-p
      (org-element-map tree 'table 'identity info 'first-match)
      info))))

(ert-deftest test-org-export/table-row-group ()
  "Test `org-export-table-row-group' specifications."
  ;; 1. A rule creates a new group.
  (org-test-with-parsed-data "
| a | b |
|---+---|
| 1 | 2 |"
    (should
     (equal
      '(1 nil 2)
      (mapcar (lambda (row) (org-export-table-row-group row info))
	      (org-element-map tree 'table-row 'identity)))))
  ;; 2. Special rows are ignored in count.
  (org-test-with-parsed-data "
| / | < | > |
|---|---+---|
|   | 1 | 2 |"
    (should
     (equal
      '(nil nil 1)
      (mapcar (lambda (row) (org-export-table-row-group row info))
	      (org-element-map tree 'table-row 'identity)))))
  ;; 3. Double rules also are ignored in count.
  (org-test-with-parsed-data "
| a | b |
|---+---|
|---+---|
| 1 | 2 |"
    (should
     (equal
      '(1 nil nil 2)
      (mapcar (lambda (row) (org-export-table-row-group row info))
	      (org-element-map tree 'table-row 'identity))))))

(ert-deftest test-org-export/table-cell-width ()
  "Test `org-export-table-cell-width' specifications."
  ;; 1. Width is primarily determined by width cookies.  If no cookie
  ;;    is found, cell's width is nil.
  (org-test-with-parsed-data "
| / | <l> | <6> | <l7> |
|   |  a  |  b  |  c   |"
    (should
     (equal
      '(nil 6 7)
      (mapcar (lambda (cell) (org-export-table-cell-width cell info))
	      (org-element-map tree 'table-cell 'identity info)))))
  ;; 2. The last width cookie has precedence.
  (org-test-with-parsed-data "
| <6> |
| <7> |
|  a  |"
    (should
     (equal
      '(7)
      (mapcar (lambda (cell) (org-export-table-cell-width cell info))
	      (org-element-map tree 'table-cell 'identity info)))))
  ;; 3. Valid width cookies must have a specific row.
  (org-test-with-parsed-data "| <6> | cell |"
    (should
     (equal
      '(nil nil)
      (mapcar (lambda (cell) (org-export-table-cell-width cell info))
	      (org-element-map tree 'table-cell 'identity))))))

(ert-deftest test-org-export/table-cell-alignment ()
  "Test `org-export-table-cell-alignment' specifications."
  (let ((org-table-number-fraction 0.5)
	(org-table-number-regexp "^[0-9]+$"))
    ;; 1. Alignment is primarily determined by alignment cookies.
    (org-test-with-temp-text "| <l> | <c> | <r> |"
      (let* ((tree (org-element-parse-buffer))
	     (info `(:parse-tree ,tree)))
	(should
	 (equal
	  '(left center right)
	  (mapcar (lambda (cell) (org-export-table-cell-alignment cell info))
		  (org-element-map tree 'table-cell 'identity))))))
    ;; 2. The last alignment cookie has precedence.
    (org-test-with-parsed-data "
| <l8> |
| cell |
| <r9> |"
      (should
       (equal
	'(right right right)
	(mapcar (lambda (cell) (org-export-table-cell-alignment cell info))
		(org-element-map tree 'table-cell 'identity)))))
    ;; 3. If there's no cookie, cell's contents determine alignment.
    ;;    A column mostly made of cells containing numbers will align
    ;;    its cells to the right.
    (org-test-with-parsed-data "
| 123       |
| some text |
| 12345     |"
      (should
       (equal
	'(right right right)
	(mapcar (lambda (cell)
		  (org-export-table-cell-alignment cell info))
		(org-element-map tree 'table-cell 'identity)))))
    ;; 4. Otherwise, they will be aligned to the left.
    (org-test-with-parsed-data "
| text      |
| some text |
| \alpha    |"
      (should
       (equal
	'(left left left)
	(mapcar (lambda (cell)
		  (org-export-table-cell-alignment cell info))
		(org-element-map tree 'table-cell 'identity)))))))

(ert-deftest test-org-export/table-cell-borders ()
  "Test `org-export-table-cell-borders' specifications."
  ;; 1. Recognize various column groups indicators.
  (org-test-with-parsed-data "| / | < | > | <> |"
    (should
     (equal
      '((right bottom top) (left bottom top) (right bottom top)
	(right left bottom top))
      (mapcar (lambda (cell)
		(org-export-table-cell-borders cell info))
	      (org-element-map tree 'table-cell 'identity)))))
  ;; 2. Accept shortcuts to define column groups.
  (org-test-with-parsed-data "| / | < | < |"
    (should
     (equal
      '((right bottom top) (right left bottom top) (left bottom top))
      (mapcar (lambda (cell)
		(org-export-table-cell-borders cell info))
	      (org-element-map tree 'table-cell 'identity)))))
  ;; 3. A valid column groups row must start with a "/".
  (org-test-with-parsed-data "
|   | < |
| a | b |"
    (should
     (equal '((top) (top) (bottom) (bottom))
	    (mapcar (lambda (cell)
		      (org-export-table-cell-borders cell info))
		    (org-element-map tree 'table-cell 'identity)))))
  ;; 4. Take table rules into consideration.
  (org-test-with-parsed-data "
| 1 |
|---|
| 2 |"
    (should
     (equal '((below top) (bottom above))
	    (mapcar (lambda (cell)
		      (org-export-table-cell-borders cell info))
		    (org-element-map tree 'table-cell 'identity)))))
  ;; 5. Top and (resp. bottom) rules induce both `top' and `above'
  ;;    (resp. `bottom' and `below') borders.  Any special row is
  ;;    ignored.
  (org-test-with-parsed-data "
|---+----|
| / |    |
|   |  1 |
|---+----|"
    (should
     (equal '((bottom below top above))
	    (last
	     (mapcar (lambda (cell)
		       (org-export-table-cell-borders cell info))
		     (org-element-map tree 'table-cell 'identity)))))))

(ert-deftest test-org-export/table-dimensions ()
  "Test `org-export-table-dimensions' specifications."
  ;; 1. Standard test.
  (org-test-with-parsed-data "
| 1 | 2 | 3 |
| 4 | 5 | 6 |"
    (should
     (equal '(2 . 3)
	    (org-export-table-dimensions
	     (org-element-map tree 'table 'identity info 'first-match) info))))
  ;; 2. Ignore horizontal rules and special columns.
  (org-test-with-parsed-data "
| / | < | > |
| 1 | 2 | 3 |
|---+---+---|
| 4 | 5 | 6 |"
    (should
     (equal '(2 . 3)
	    (org-export-table-dimensions
	     (org-element-map tree 'table 'identity info 'first-match) info)))))

(ert-deftest test-org-export/table-cell-address ()
  "Test `org-export-table-cell-address' specifications."
  ;; 1. Standard test: index is 0-based.
  (org-test-with-parsed-data "| a | b |"
    (should
     (equal '((0 . 0) (0 . 1))
	    (org-element-map
	     tree 'table-cell
	     (lambda (cell) (org-export-table-cell-address cell info))
	     info))))
  ;; 2. Special column isn't counted, nor are special rows.
  (org-test-with-parsed-data "
| / | <> |
|   | c  |"
    (should
     (equal '(0 . 0)
	    (org-export-table-cell-address
	     (car (last (org-element-map tree 'table-cell 'identity info)))
	     info))))
  ;; 3. Tables rules do not count either.
  (org-test-with-parsed-data "
| a |
|---|
| b |
|---|
| c |"
    (should
     (equal '(2 . 0)
	    (org-export-table-cell-address
	     (car (last (org-element-map tree 'table-cell 'identity info)))
	     info))))
  ;; 4. Return nil for special cells.
  (org-test-with-parsed-data "| / | a |"
    (should-not
     (org-export-table-cell-address
      (org-element-map tree 'table-cell 'identity nil 'first-match)
      info))))

(ert-deftest test-org-export/get-table-cell-at ()
  "Test `org-export-get-table-cell-at' specifications."
  ;; 1. Address ignores special columns, special rows and rules.
  (org-test-with-parsed-data "
| / | <> |
|   | a  |
|---+----|
|   | b  |"
    (should
     (equal '("b")
	    (org-element-contents
	     (org-export-get-table-cell-at
	      '(1 . 0)
	      (org-element-map tree 'table 'identity info 'first-match)
	      info)))))
  ;; 2. Return value for a non-existent address is nil.
  (org-test-with-parsed-data "| a |"
    (should-not
     (org-export-get-table-cell-at
      '(2 . 2)
      (org-element-map tree 'table 'identity info 'first-match)
      info)))
  (org-test-with-parsed-data "| / |"
    (should-not
     (org-export-get-table-cell-at
      '(0 . 0)
      (org-element-map tree 'table 'identity info 'first-match)
      info))))

(ert-deftest test-org-export/table-cell-starts-colgroup-p ()
  "Test `org-export-table-cell-starts-colgroup-p' specifications."
  ;; 1. A cell at a beginning of a row always starts a column group.
  (org-test-with-parsed-data "| a |"
    (should
     (org-export-table-cell-starts-colgroup-p
      (org-element-map tree 'table-cell 'identity info 'first-match)
      info)))
  ;; 2. Special column should be ignored when determining the
  ;;    beginning of the row.
  (org-test-with-parsed-data "
| / |   |
|   | a |"
    (should
     (org-export-table-cell-starts-colgroup-p
      (org-element-map tree 'table-cell 'identity info 'first-match)
      info)))
  ;; 2. Explicit column groups.
  (org-test-with-parsed-data "
| / |   | < |
| a | b | c |"
    (should
     (equal
      '(yes no yes)
      (org-element-map
       tree 'table-cell
       (lambda (cell)
	 (if (org-export-table-cell-starts-colgroup-p cell info) 'yes 'no))
       info)))))

(ert-deftest test-org-export/table-cell-ends-colgroup-p ()
  "Test `org-export-table-cell-ends-colgroup-p' specifications."
  ;; 1. A cell at the end of a row always ends a column group.
  (org-test-with-parsed-data "| a |"
    (should
     (org-export-table-cell-ends-colgroup-p
      (org-element-map tree 'table-cell 'identity info 'first-match)
      info)))
  ;; 2. Special column should be ignored when determining the
  ;;    beginning of the row.
  (org-test-with-parsed-data "
| / |   |
|   | a |"
    (should
     (org-export-table-cell-ends-colgroup-p
      (org-element-map tree 'table-cell 'identity info 'first-match)
      info)))
  ;; 3. Explicit column groups.
  (org-test-with-parsed-data "
| / | < |   |
| a | b | c |"
    (should
     (equal
      '(yes no yes)
      (org-element-map
       tree 'table-cell
       (lambda (cell)
	 (if (org-export-table-cell-ends-colgroup-p cell info) 'yes 'no))
       info)))))

(ert-deftest test-org-export/table-row-starts-rowgroup-p ()
  "Test `org-export-table-row-starts-rowgroup-p' specifications."
  ;; 1. A row at the beginning of a table always starts a row group.
  ;;    So does a row following a table rule.
  (org-test-with-parsed-data "
| a |
|---|
| b |"
    (should
     (equal
      '(yes no yes)
      (org-element-map
       tree 'table-row
       (lambda (row)
	 (if (org-export-table-row-starts-rowgroup-p row info) 'yes 'no))
       info))))
  ;; 2. Special rows should be ignored when determining the beginning
  ;;    of the row.
  (org-test-with-parsed-data "
| / | < |
|   | a |
|---+---|
| / | < |
|   | b |"
    (should
     (equal
      '(yes no yes)
      (org-element-map
       tree 'table-row
       (lambda (row)
	 (if (org-export-table-row-starts-rowgroup-p row info) 'yes 'no))
       info)))))

(ert-deftest test-org-export/table-row-ends-rowgroup-p ()
  "Test `org-export-table-row-ends-rowgroup-p' specifications."
  ;; 1. A row at the end of a table always ends a row group.  So does
  ;;    a row preceding a table rule.
  (org-test-with-parsed-data "
| a |
|---|
| b |"
    (should
     (equal
      '(yes no yes)
      (org-element-map
       tree 'table-row
       (lambda (row)
	 (if (org-export-table-row-ends-rowgroup-p row info) 'yes 'no))
       info))))
  ;; 2. Special rows should be ignored when determining the beginning
  ;;    of the row.
  (org-test-with-parsed-data "
|   | a |
| / | < |
|---+---|
|   | b |
| / | < |"
    (should
     (equal
      '(yes no yes)
      (org-element-map
       tree 'table-row
       (lambda (row)
	 (if (org-export-table-row-ends-rowgroup-p row info) 'yes 'no))
       info)))))

(ert-deftest test-org-export/table-row-starts-header-p ()
  "Test `org-export-table-row-starts-header-p' specifications."
  ;; 1. Only the row starting the first row group starts the table
  ;;    header.
  (org-test-with-parsed-data "
| a |
| b |
|---|
| c |"
    (should
     (equal
      '(yes no no no)
      (org-element-map
       tree 'table-row
       (lambda (row)
	 (if (org-export-table-row-starts-header-p row info) 'yes 'no))
       info))))
  ;; 2. A row cannot start an header if there's no header in the
  ;;    table.
  (org-test-with-parsed-data "
| a |
|---|"
    (should-not
     (org-export-table-row-starts-header-p
      (org-element-map tree 'table-row 'identity info 'first-match)
      info))))

(ert-deftest test-org-export/table-row-ends-header-p ()
  "Test `org-export-table-row-ends-header-p' specifications."
  ;; 1. Only the row starting the first row group starts the table
  ;;    header.
  (org-test-with-parsed-data "
| a |
| b |
|---|
| c |"
    (should
     (equal
      '(no yes no no)
      (org-element-map
       tree 'table-row
       (lambda (row)
	 (if (org-export-table-row-ends-header-p row info) 'yes 'no))
       info))))
  ;; 2. A row cannot start an header if there's no header in the
  ;;    table.
  (org-test-with-parsed-data "
| a |
|---|"
    (should-not
     (org-export-table-row-ends-header-p
      (org-element-map tree 'table-row 'identity info 'first-match)
      info))))



;;; Topology

(ert-deftest test-org-export/get-next-element ()
  "Test `org-export-get-next-element' specifications."
  ;; Standard test.
  (should
   (equal "b"
	  (org-test-with-parsed-data "* Headline\n*a* b"
	    (org-export-get-next-element
	     (org-element-map tree 'bold 'identity info t) info))))
  ;; Return nil when no previous element.
  (should-not
   (org-test-with-parsed-data "* Headline\na *b*"
     (org-export-get-next-element
      (org-element-map tree 'bold 'identity info t) info)))
  ;; Non-exportable elements are ignored.
  (should-not
   (let ((org-export-with-timestamps nil))
     (org-test-with-parsed-data "\alpha <2012-03-29 Thu>"
       (org-export-get-next-element
	(org-element-map tree 'entity 'identity info t) info))))
  ;; Find next element in secondary strings.
  (should
   (eq 'verbatim
       (org-test-with-parsed-data "* a =verb="
	 (org-element-type
	  (org-export-get-next-element
	   (org-element-map tree 'plain-text 'identity info t) info)))))
  ;; Find next element in document keywords.
  (should
   (eq 'verbatim
       (org-test-with-parsed-data "#+TITLE: a =verb="
	 (org-element-type
	  (org-export-get-next-element
	   (org-element-map
	    (plist-get info :title) 'plain-text 'identity info t) info)))))
  ;; Find next element in parsed affiliated keywords.
  (should
   (eq 'verbatim
       (org-test-with-parsed-data "#+CAPTION: a =verb=\nParagraph"
	 (org-element-type
	  (org-export-get-next-element
	   (org-element-map tree 'plain-text 'identity info t nil t) info))))))

(ert-deftest test-org-export/get-previous-element ()
  "Test `org-export-get-previous-element' specifications."
  ;; Standard test.
  (should
   (equal "a "
	  (org-test-with-parsed-data "* Headline\na *b*"
	    (org-export-get-previous-element
	     (org-element-map tree 'bold 'identity info t) info))))
  ;; Return nil when no previous element.
  (should-not
   (org-test-with-parsed-data "* Headline\n*a* b"
     (org-export-get-previous-element
      (org-element-map tree 'bold 'identity info t) info)))
  ;; Non-exportable elements are ignored.
  (should-not
   (let ((org-export-with-timestamps nil))
     (org-test-with-parsed-data "<2012-03-29 Thu> \alpha"
       (org-export-get-previous-element
	(org-element-map tree 'entity 'identity info t) info))))
  ;; Find previous element in secondary strings.
  (should
   (eq 'verbatim
       (org-test-with-parsed-data "* =verb= a"
	 (org-element-type
	  (org-export-get-previous-element
	   (org-element-map tree 'plain-text 'identity info t) info)))))
  ;; Find previous element in document keywords.
  (should
   (eq 'verbatim
       (org-test-with-parsed-data "#+TITLE: =verb= a"
	 (org-element-type
	  (org-export-get-previous-element
	   (org-element-map
	    (plist-get info :title) 'plain-text 'identity info t) info)))))
  ;; Find previous element in parsed affiliated keywords.
  (should
   (eq 'verbatim
       (org-test-with-parsed-data "#+CAPTION: =verb= a\nParagraph"
	 (org-element-type
	  (org-export-get-previous-element
	   (org-element-map tree 'plain-text 'identity info t nil t) info))))))


(provide 'test-org-export)
;;; test-org-export.el end here