1 files changed, 38 insertions, 0 deletions
diff --git a/testing/marionette/harness/marionette_harness/www/test_dynamic.html b/testing/marionette/harness/marionette_harness/www/test_dynamic.html
new file mode 100644
index 0000000000..504e7e74ba
--- /dev/null
+++ b/testing/marionette/harness/marionette_harness/www/test_dynamic.html
@@ -0,0 +1,38 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
+    "http://www.w3.org/TR/html4/loose.dtd">
+<html>
+  <head>
+    <title></title>
+    <script type="text/javascript">
+      let next = 0;
+
+      function addMore() {
+        let box = document.createElement('DIV');
+        box.id = 'box' + next++;
+        box.className = 'redbox';
+        box.style.width = '150px';
+        box.style.height = '150px';
+        box.style.backgroundColor = 'red';
+        box.style.border = '1px solid black';
+        box.style.margin = '5px';
+        window.setTimeout(function() {
+          document.body.appendChild(box);
+          }, 1000);
+        }
+
+        function reveal() {
+          let elem = document.getElementById('revealed');
+          window.setTimeout(function() {
+            elem.style.display = '';
+          }, 1000);
+        }
+      </script>
+    </head>
+    <body>
+      <input id="adder" type="button" value="Add a box!" onclick="addMore()"/>
+
+      <input id="reveal" type="button" value="Reveal a new input" onclick="reveal();" />
+
+      <input id="revealed" style="display:none;" />
+    </body>
+  </html>