Error handling in mocha unit tests

I have mocha tests. I will simplify as possible as I can. I wonder how should I handle the errors in mocha tests. For example, if there is an error in getName, what should I do? How can I throw an error? Or should I use done(error) as;

 it('trial', function(done) {
    getName(function (name, err) {
        if(err){
            done(err); //what should I do here? 
        }else{
            console.log(name);
        }
    });
});