Problem with test file for latest ruby on rails

I downloaded the latest rails from the website and it gives the
following test file:

require ‘test_helper’

class ArticleTest < ActiveSupport::TestCase

Replace this with your real tests.

def test_truth
assert true

that is it!

Now when I run the above I get the error message:

C:\ruby\econstructor>ruby test\unit\article_test.rb
gem_original_require': no such file to load -- test_helper (LoadError) from c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:inrequire’
from test/unit/article_test.rb:1

I know previously when the test were generated we would get a file that
had the following line ontop :
require File.dirname(FILE) + ‘/…/test_helper’

So why is that line removed? its removal is giving me errors when I
install afresh…

also I wish there was a way of having a rails app transferred to another
machine (a fresh one) and have the gems installed automatically instead
of going down a list and installing them one by one.

What do you think?