* undo-tests.el (undo-test-buffer-modified, undo-test-file-modified): New tests.

2 files changed, 31 insertions, 0 deletions

diff --git a/test/ChangeLog b/test/ChangeLog
index 0a9bedcb5d..5e29dd4e8d 100644
--- a/test/ChangeLog
+++ b/test/ChangeLog
@@ -1,3 +1,8 @@
+2013-07-11  Glenn Morris  <rgm@gnu.org>
+
+	* automated/undo-tests.el (undo-test-buffer-modified)
+	(undo-test-file-modified): New tests.
+
 2013-07-09  Michael Albinus  <michael.albinus@gmx.de>
 
 	* automated/file-notify-tests.el (file-notify-test00-availability):
diff --git a/test/automated/undo-tests.el b/test/automated/undo-tests.el
index 98b0c52728..87c55c5d37 100644
--- a/test/automated/undo-tests.el
+++ b/test/automated/undo-tests.el
@@ -200,6 +200,32 @@
                   '(error "Unrecognized entry in undo list \"bogus\""))))
         (buffer-string))))))
 
+;; http://debbugs.gnu.org/14824
+(ert-deftest undo-test-buffer-modified ()
+  "Test undoing marks buffer unmodified."
+  (with-temp-buffer
+    (buffer-enable-undo)
+    (insert "1")
+    (undo-boundary)
+    (set-buffer-modified-p nil)
+    (insert "2")
+    (undo)
+    (should-not (buffer-modified-p))))
+
+(ert-deftest undo-test-file-modified ()
+  "Test undoing marks buffer visiting file unmodified."
+  (let ((tempfile (make-temp-file "undo-test")))
+    (unwind-protect
+        (progn
+          (with-current-buffer (find-file-noselect tempfile)
+            (insert "1")
+            (undo-boundary)
+            (set-buffer-modified-p nil)
+            (insert "2")
+            (undo)
+            (should-not (buffer-modified-p))))
+      (delete-file tempfile))))
+
 (defun undo-test-all (&optional interactive)
   "Run all tests for \\[undo]."
   (interactive "p")