require 'rubygems'
require 'johnson'
require 'spec'

RUNTIME = Johnson::Runtime.new
RUNTIME.evaluate <<-JS
var Person = function(name) {
  this.name = name;
  this.foods = [];
}

Person.prototype.meet = function() {
  return "Hello there! My name is " + this.name + '.';
}

Person.prototype.greet = function(friend) {
  return "Hello there " + friend + "! How are you?";
}

Person.prototype.eats = function(foods) {
  this.foods = arguments;
}
JS

module JSClass
  def self.create(name)
    klass = RUNTIME.evaluate(name)
    klass._klass_name = name
    klass.extend(ClassMethods)
  end

  module ClassMethods
    def new(*args)
      js_args = args.map { |a| a.inspect }.join(', ')
      RUNTIME.evaluate("new #{_klass_name}(#{js_args})")
    end
  end
end

Person = JSClass.create('Person')

describe Person do
  before(:each) do
    @p = Person.new("Pat")
  end

  it "should meet" do
    @p.meet.should == "Hello there! My name is Pat."
  end

  it "should greet" do
    @p.greet("Buddy").should == "Hello there Buddy! How are you?"
  end

  it "should work with multiple args" do
    @p.foods.length.should == 0
    @p.eats("Fish", "Cider", "Eggs")
    @p.foods.length.should == 3
  end
end