[jQuery] Elements not having a class

[jQuery] Elements not having a class


How can I get DIV elements not having a class ("test-class") inside a
main DIV#Main?
I am trying
var count = 0;
$("#Main > div").each(function(){
if(!($(this).hasClass(".test-class")))
{
count += 1;
}
});
alert(count);
But this is not the correct way I think.
How can I do it?