public void DroppableUnAcceptBox() { var droppablePage = new DroppablePage(this.driver); Actions builder = new Actions(this.driver); droppablePage.Navigate(); droppablePage.AcceptButton.Click(); var drag = builder.DragAndDrop(droppablePage.NonValidBox, droppablePage.AcceptBox); drag.Perform(); droppablePage.AssertNonChangeBox("ui-widget-header ui-droppable"); }