Failed test which demonstrates that node.to_xml does not respect AS_X…

…ML save option

test/xml/test_node.rb

@@ -854,7 +854,7 @@ def test_namespace
             <b:div>hello b</b:div>
             <c:div>hello c</c:div>
             <div>hello moon</div>
-          </y>  
+          </y>
         </x>
         EOF
         set = xml.search("//y/*")
@@ -917,6 +917,15 @@ def test_blank
         doc = Nokogiri::XML('')
         assert_equal false, doc.blank?
       end
+
+      def test_to_xml_allows_to_serialize_with_as_xml_save_option
+        xml = Nokogiri::XML("<root><ul><li>Hello world</li></ul></root>")
+        set = xml.search("//ul")
+        node = set.first
+
+        assert_no_match("<ul>\n  <li>", xml.to_xml(:save_with => XML::Node::SaveOptions::AS_XML))
+        assert_no_match("<ul>\n  <li>", node.to_xml(:save_with => XML::Node::SaveOptions::AS_XML))
+      end
     end
   end
 end