1 files changed, 79 insertions, 0 deletions
diff --git a/editor/libeditor/tests/test_bug471722.html b/editor/libeditor/tests/test_bug471722.html
new file mode 100644
index 0000000000..b7fd6522e3
--- /dev/null
+++ b/editor/libeditor/tests/test_bug471722.html
@@ -0,0 +1,79 @@
+<!DOCTYPE HTML>
+<!-- This Source Code Form is subject to the terms of the Mozilla Public
+   - License, v. 2.0. If a copy of the MPL was not distributed with this
+   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=471722
+-->
+
+<head>
+  <title>Test for Bug 471722</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+  <script src="/tests/SimpleTest/EventUtils.js"></script>  
+</head>
+
+<body onload="doTest();">
+  <a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=471722">Mozilla Bug 471722</a>
+  <p id="display"></p>
+  <div id="content" style="display: none">
+  </div>
+
+  <pre id="test">
+    <script type="application/javascript">
+
+      /** Test for Bug 471722 **/
+
+      SimpleTest.waitForExplicitFinish();
+
+      function doTest() {
+        var t1 = $("t1");
+        var editor = SpecialPowers.wrap(t1).editor;
+
+        ok(editor, "able to get editor for the element");
+        t1.focus();
+        t1.select();
+
+        try {
+          // Cut the initial text in the textbox
+          ok(editor.canCut(), "can cut text");
+          editor.cut();
+          is(t1.value, "", "initial text was removed");
+
+          // So now we will have emptied the textfield and the editor will have
+          // created a padding <br> element for empty editor.
+          // Check the transaction is in the undo stack...
+          var t1Enabled = {};
+          var t1CanUndo = {};
+          editor.canUndo(t1Enabled, t1CanUndo);
+          ok(t1CanUndo.value, "undo is enabled");
+
+          // Undo the cut
+          editor.undo(1);
+          is(t1.value, "minefield", "text reinserted");
+
+          // So now, the cut should be in the redo stack, so executing the redo
+          // will clear the text once again and reinsert the padding <br>
+          // element for empty editor that was removed after undo.
+          // This will require the editor to figure out that we have a padding
+          // <br> element again...
+          var t1CanRedo = {};
+          editor.canRedo(t1Enabled, t1CanRedo);
+          ok(t1CanRedo.value, "redo is enabled");
+          editor.redo(1);
+
+          // Did the editor notice a padding <br> element for empty editor
+          // reappeared?
+          is(t1.value, "", "editor found padding <br> element");
+       } catch (e) {
+         ok(false, "test failed with error " + e);
+       }
+       SimpleTest.finish();
+     }
+   </script>
+  </pre>
+
+  <input type="text" value="minefield" id="t1" />
+</body>
+</html>