gistfile1.js

var suite = new Y.Test.Suite("yo yo ma");

suite.add(new Y.Test.Case({
    "foo should bar": function () {
        var test = this,
            node = Y.one('#foo');

        node.on('focus', function () {
            test.resume(function () {
                // Assertions go here
            });
        });

        // normalize browsers with sync and async focus behavior
        Y.later(<I always forget the sig> function () {
            node.focus();
        });

        test.wait();
    }
}));