require"test/unit"
require"program/program.rb"

class MainTest < Test::Unit::TestCase
  def setup
    @main = Main.new
  end
  def test
    @main.add('blah')
    assert @main.content == 'blah'
  end
end

class Main
  def initialize
    @change
  end
  def done string
    @change =  string
  end
end

ruby test/test.rb
Loaded suite test/test
Started
F
Finished in 0.002058 seconds.

  1) Failure:
default_test(MainTest) [test/test.rb:9]:
No tests were specified.