Camping list - Mar 2013 - unit testing for the first time

Bonjour,
how can i unit test the methods from my module App:helpers ?
 i''m new to ruby and to unit testing , english is not my mother tongue.
All
that i know come from

http://en.wikibooks.org/wiki/Ruby_Programming/Unit_testing

and

M R . N E I G H B O R L Y '' S
HUMBLE LITTLE
RUBY BOOK

i ''ve tried this, but i don''t know how to reference the 
helpers in my app.

require ''test/unit''
require ''app.rb''  # this doesn''t work

class Test_helpers < Test::Unit::TestCase
    def test_extraire_lieu
        assert_equal ("ici",
App::Helpers.test_extraire_lieu({lieu=>"ici",
bla => ''xxx'', ble => ''xxxx''}))
    end
end

thanks
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There was a good discussion about this on stackoverflow. Look for "testing
Ruby modules"

On 27 mrt. 2013, at 07:33, Francois Sery <sery.francois at gmail.com>
wrote:
>  i''m new to ruby and to unit testing ,