class Test::Unit::Collector::Dir

def collect_file(name, suites, already_gathered)
  dir = @file.dirname(@file.expand_path(name, @base))
  $:.unshift(dir)
  if(@req)
    @req.require(name)
  else
    require(name)
  end
  find_test_cases(already_gathered).each{|t| add_suite(suites, t.suite)}
ensure
  $:.delete_at($:.rindex(dir)) if(dir)
end