sdesai

YUI.add('root-cls', function (Y) {
    Y.Base._buildCfg.aggregates.push('getClassAttrs');
    
    Y.rootClass = Y.Base.create('root-class', Y.Base, [], {
        someInstanceMethod :  function () {}
    }, {
        ATTRS : {
            test : {
                validator : Y.Lang.isBoolean
            }

sdesai

// The idea behind ATTRS, is that Base will take care of 
// setting up the attributes defined in ATTRS for each
// subclass. So, you don't need to do anything special
// for Class2's ATTRS definition.

// Changing Class2 to this should take care of it.

var Class2 = function(config) {
    Class2.superclass.constructor.apply(this, arguments);
};