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+;;; footnote-tests.el --- Tests for footnote-mode    -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2019  Free Software Foundation, Inc.
+
+;; Author: Stefan Monnier <monnier@iro.umontreal.ca>
+;; Keywords:
+
+;; This program 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.
+
+;; This program 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 this program.  If not, see <https://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;;
+
+;;; Code:
+
+(ert-deftest footnote-tests-same-place ()
+  (with-temp-buffer
+    (footnote-mode 1)
+    (insert "hello world")
+    (beginning-of-line) (forward-word)
+    (footnote-add-footnote)
+    (insert "footnote")
+    (footnote-back-to-message)
+    (should (equal (buffer-substring (point-min) (point))
+                   "hello[1]"))
+    (beginning-of-line) (forward-word)
+    (footnote-add-footnote)
+    (insert "other footnote")
+    (footnote-back-to-message)
+    (should (equal (buffer-substring (point-min) (point))
+                   "hello[1]"))
+    (should (equal (buffer-substring (point-min) (line-end-position))
+                   "hello[1][2] world"))))
+
+(provide 'footnote-tests)
+;;; footnote-tests.el ends here