Trying to add class using if and else but not working properly

I am trying to add class using if and else,but its not working beyond if not reaching to else.

$('.headings aside').click(function() {
    if ($(this).children('span').hasClass("fa-caret-up")) {
      $(this).children('span').addClass('borderGap');
      alert("Hello! I am an alert box!!");
    } else {
      alert("Second Alert");
      $(this).children('span').removeClass('borderGap');
    };
});

Thanks in advance