Add test that adopting an element into a new doc updates the attribut…

…e' owner docs

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>

dom/nodes/Node-mutation-adoptNode.html

@@ -20,4 +20,18 @@
   assert_equals(div.firstChild.ownerDocument, document);
 }, "simple append of foreign div with text");
 
+test(function() {
+  var div = document.createElement("div");
+  div.id = "foobar";
+
+  assert_equals(div.ownerDocument, document);
+  assert_equals(div.attributes[0].ownerDocument, document);
+
+  var other_doc = document.implementation.createHTMLDocument();
+  other_doc.body.appendChild(div);
+
+  assert_equals(div.ownerDocument, other_doc);
+  assert_equals(div.attributes[0].ownerDocument, other_doc);
+}, "Adopting an element into a different document update's the element's owner doc as well as the owner docs of it's attributes")
+
 </script>