what can or cannot be done with a controller created in a module Vs controller created globally?

beforeEach(module('testAngularApp'));

class ApplicationController < ActionController::Base
  include ModuleFoo

  def index
    bar # Use ModuleFoo's method directly
    #...
  end
end

# ModuleFoo
module ModuleFoo
  def bar
  end
end

if defined? ActionController::Base
  ActionController::Base.class_eval do
    include ModuleFoo
  end
end

# Controller
class SomethingController < ApplicationController
  def some_method
    bar # use this directly
  end
end

var mainModule = angular.module('module1');

mainModule.controller('home', function($scope) {

    $scope.test = "hello";
});

beforeEach(module('module1'));