Mocha DOM Manipulation for Backbone Application

How to implement mocha unit test case for backbone application which involves DOM manipulation also how to write mocha test case for events?

$.each(studentList, function(index, element) {
if($("#"+element).val()!=undefined && $("#"+element).val()!="") {
$("#"+element).attr("disabled","true");
$("#"+element+"-added").attr("disabled","true");
}
});