Testing class inheritance in Coffeescript

generated.js

var Bye, Greeting, Hello,
  __hasProp = {}.hasOwnProperty,
  __extends = function(child, parent) { for (var key in parent) { if (__hasProp.call(parent, key)) child[key] = parent[key]; } function ctor() { this.constructor = child; } ctor.prototype = parent.prototype; child.prototype = new ctor(); child.__super__ = parent.prototype; return child; };

Greeting = (function() {

  function Greeting() {}

  Greeting.prototype.initialize = function() {
    return this.message = "Hello";
  };

  Greeting.prototype.hello = function(name) {
    return alert("" + this.message + " " + name);
  };

  return Greeting;

})();

Hello = (function(_super) {

  __extends(Hello, _super);

  function Hello() {
    return Hello.__super__.constructor.apply(this, arguments);
  }

  Hello.prototype.hello = function() {
    return Hello.__super__.hello.call(this, 'James Bond');
  };

  return Hello;

})(Greeting);

Bye = Greeting.extend({
  hello: function() {
    return hello.__super__.constructor.call(this, 'Bames Jond');
  }
});

source.coffee

class Greeting
  initialize: ->
    @message = "Hello"

  hello: (name) ->
    alert "#{@message} #{name}"

class Hello extends Greeting
  hello: ->
    super('James Bond')

Bye = Greeting.extend
  hello: ->
    super('Bames Jond')