Test the org-open-at-point function.

* testing/examples/open-at-point.org: new file.
* testing/lisp/test-org-open-at-point.el: new file.

This tests only the function when inside or before bracket links
and plain links.

testing/examples/open-at-point.org

@@ -0,0 +1,8 @@
+
+* Header 1
+  :PROPERTIES:
+  :ID:       header1_with_great_id
+  :END:
+* Header 2
+  [[id:header1_with_great_id][Header 1]]
+  id:header1_with_great_id

testing/lisp/test-org-open-at-point.el

@@ -0,0 +1,61 @@
+;;; test-org-open-at-point.el
+
+;; Copyright (c) Samuel Loury
+;; Authors: Samuel Loury
+
+;; Released under the GNU General Public License version 3
+;; see: http://www.gnu.org/licenses/gpl-3.0.html
+
+;;;; Comments:
+
+;; Test for the org-open-at-point function
+
+;;; Code:
+
+(save-excursion
+  (set-buffer (get-buffer-create "test-org-open-at-point.el"))
+  (setq ly-here
+        (file-name-directory
+         (or load-file-name (buffer-file-name)))))
+
+(defun test-org-open-at-point/goto-fixture ()
+  (find-file-other-window
+   (concat ly-here "../examples/open-at-point.org"))
+  (set-buffer "open-at-point.org"))
+
+(ert-deftest test-org-open-at-point/bracket-link-inside ()
+  "Test `org-open-at-point' from inside a bracket link."
+  (test-org-open-at-point/goto-fixture)
+  ;; go inside the bracket link
+  (goto-char 113)
+  (org-open-at-point)
+  ;; should now be in front of the header
+  (should (equal (point) 2)))
+
+(ert-deftest test-org-open-at-point/plain-link-inside ()
+  "Test `org-open-at-point' from inside a plain link."
+  (test-org-open-at-point/goto-fixture)
+  ;; go inside the plain link
+  (goto-char 126)
+  (org-open-at-point)
+  ;; should now be in front of the header
+  (should (equal (point) 2)))
+
+(ert-deftest test-org-open-at-point/bracket-link-before ()
+  "Test `org-open-at-point' from before a bracket link but in the same line."
+  (test-org-open-at-point/goto-fixture)
+  ;; go before the bracket link
+  (goto-char 83)
+  (message "point %s" (point))
+  (org-open-at-point)
+  ;; should now be in front of the header
+  (should (equal (point) 2)))
+
+(ert-deftest test-org-open-at-point/plain-link-before ()
+  "Test `org-open-at-point' from before a plain link but in the same line."
+  (test-org-open-at-point/goto-fixture)
+  ;; go before the plain link
+  (goto-char 124)
+  (org-open-at-point)
+  ;; should now be in front of the header
+  (should (equal (point) 2)))