[Wtr-general] creating test suites

[Luke]

I practice at ruby and I've done some example test case,now I would like to
create test suite and generate report
can someone look at this code and explain me what's wrong? I still get
message :

C:/Test/ruby/lib/ruby/site_ruby/1.8/test/unit/ui/reporter.rb:63:in `run':
uninitialized constant Test::Unit::UI::Reporter::StringIO (NameError)
from C:/Testy/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in
`gem_original_require'
from C:/Testy/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in
`require'
from
C:/RadRails/plugins/org.rubypeople.rdt.testunit_0.8.0.604272100PRD/ruby/RemoteTestRunner.rb:260
thnx4help

require 'watir'
include Watir

require 'test/unit'
require 'test/unit/ui/console/testrunner'
require 'test/unit/ui/reporter'
require 'fileutils'

class AttachClass<Test::Unit::TestCase
    def test_example
    #some code
    end
end

begin
    Test::Unit::UI::Console::TestRunner.new(AttachClass.suite).start
    suite = Test::Unit::TestSuite.new
    suite << AttachClass.suite
    FileUtils.mkdir_p 'build/report'
    Test::Unit::UI::Reporter.run(suite, 'build/report',:html)
end
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