Add tests for org-refile-get-targets

* testing/lisp/test-org.el (test-org/refile-get-targets): New test.

Based on a patch from Sebastian Reuße <seb@wirrsal.net>.

testing/lisp/test-org.el

@@ -5340,6 +5340,111 @@ Paragraph<point>"
 	 (insert "new")
 	 (org-element-type (org-element-context))))))
 
+
+;;; Refile
+
+(ert-deftest test-org/refile-get-targets ()
+  "Test `org-refile-get-targets' specifications."
+  ;; :maxlevel includes all headings above specified value.
+  (should
+   (equal '("H1" "H2" "H3")
+	  (org-test-with-temp-text "* H1\n** H2\n*** H3"
+	    (let ((org-refile-use-outline-path nil)
+		  (org-refile-targets `((nil :maxlevel . 3))))
+	      (mapcar #'car (org-refile-get-targets))))))
+  (should
+   (equal '("H1" "H2")
+	  (org-test-with-temp-text "* H1\n** H2\n*** H3"
+	    (let ((org-refile-use-outline-path nil)
+		  (org-refile-targets `((nil :maxlevel . 2))))
+	      (mapcar #'car (org-refile-get-targets))))))
+  ;; :level limits targets to headlines with the specified level.
+  (should
+   (equal '("H2")
+	  (org-test-with-temp-text "* H1\n** H2\n*** H3"
+	    (let ((org-refile-use-outline-path nil)
+		  (org-refile-targets `((nil :level . 2))))
+	      (mapcar #'car (org-refile-get-targets))))))
+  ;; :tag limits targets to headlines with specified tag.
+  (should
+   (equal '("H1")
+	  (org-test-with-temp-text "* H1 :foo:\n** H2\n*** H3 :bar:"
+	    (let ((org-refile-use-outline-path nil)
+		  (org-refile-targets `((nil :tag . "foo"))))
+	      (mapcar #'car (org-refile-get-targets))))))
+  ;; :todo limits targets to headlines with specified TODO keyword.
+  (should
+   (equal '("H2")
+	  (org-test-with-temp-text "* H1\n** TODO H2\n*** DONE H3"
+	    (let ((org-refile-use-outline-path nil)
+		  (org-refile-targets `((nil :todo . "TODO"))))
+	      (mapcar #'car (org-refile-get-targets))))))
+  ;; :regexp filters targets matching provided regexp.
+  (should
+   (equal '("F2" "F3")
+	  (org-test-with-temp-text "* H1\n** F2\n*** F3"
+	    (let ((org-refile-use-outline-path nil)
+		  (org-refile-targets `((nil :regexp . "F"))))
+	      (mapcar #'car (org-refile-get-targets))))))
+  ;; A nil `org-refile-targets' includes only top level headlines in
+  ;; current buffer.
+  (should
+   (equal '("H1" "H2")
+	  (org-test-with-temp-text "* H1\n** S1\n* H2"
+	    (let ((org-refile-use-outline-path nil)
+		  (org-refile-targets nil))
+	      (mapcar #'car (org-refile-get-targets))))))
+  ;; Return value is the union of the targets according to all the
+  ;; defined rules.
+  (should
+   (equal '("F2" "F3" "H1")
+	  (org-test-with-temp-text "* TODO H1\n** F2\n*** F3"
+	    (let ((org-refile-use-outline-path nil)
+		  (org-refile-targets `((nil :regexp . "F")
+					(nil :todo . "TODO"))))
+	      (mapcar #'car (org-refile-get-targets))))))
+  ;; When `org-refile-use-outline-path' is non-nil, provide targets as
+  ;; paths.
+  (should
+   (equal '("H1" "H1/H2" "H1/H2/H3")
+	  (org-test-with-temp-text "* H1\n** H2\n*** H3"
+	    (let ((org-refile-use-outline-path t)
+		  (org-refile-targets `((nil :maxlevel . 3))))
+	      (mapcar #'car (org-refile-get-targets))))))
+  ;; When providing targets as paths, escape forward slashes in
+  ;; headings with backslashes.
+  (should
+   (equal '("H1\\/foo")
+	  (org-test-with-temp-text "* H1/foo"
+	    (let ((org-refile-use-outline-path t)
+		  (org-refile-targets `((nil :maxlevel . 1))))
+	      (mapcar #'car (org-refile-get-targets))))))
+  ;; When `org-refile-use-outline-path' is `file', include file name
+  ;; without directory in targets.
+  (should
+   (org-test-with-temp-text-in-file "* H1"
+     (let* ((filename (buffer-file-name))
+	    (org-refile-use-outline-path 'file)
+	    (org-refile-targets `(((,filename) :level . 1))))
+       (member (file-name-nondirectory filename)
+	       (mapcar #'car (org-refile-get-targets))))))
+  ;; When `org-refile-use-outline-path' is `full-file-path', include
+  ;; full file name.
+  (should
+   (org-test-with-temp-text-in-file "* H1"
+     (let* ((filename (buffer-file-name))
+	    (org-refile-use-outline-path 'full-file-path)
+	    (org-refile-targets `(((,filename) :level . 1))))
+       (member filename (mapcar #'car (org-refile-get-targets))))))
+  ;; When `org-refile-use-outline-path' is `buffer-name', include
+  ;; buffer name.
+  (should
+   (org-test-with-temp-text "* H1"
+     (let* ((org-refile-use-outline-path 'buffer-name)
+	    (org-refile-targets `((nil :level . 1))))
+       (member (buffer-name) (mapcar #'car (org-refile-get-targets)))))))
+
+
 
 ;;; Sparse trees