public void DroppableFirst() { var droppablePage = new DroppablePage(this.driver); Actions builder = new Actions(this.driver); droppablePage.Navigate(); var drag = builder.DragAndDrop(droppablePage.Source, droppablePage.Target); drag.Perform(); droppablePage.AssertChangeColorBox("ui-widget-header ui-droppable ui-state-highlight"); }