How to realize pressing enter to trigger button event in jquery

 How to realize in jquery that pressing enter triggers a button event, and clicking the submit button triggers an event, and writes these two events into one event:

//Button event
$('#btnSumit').click(function() {alert('test')});

 //Enter to submit the event
         $("body").keydown(function() {
             if (event.keyCode == "13") {//keyCode=13 is the enter key
                 $('#btnSumit').click( );
             }
         });
         //--------Enter to submit event completion ------------------//