class Test::Unit::Collector::Dir

def collect_file(name, suites, already_gathered) # :nodoc:
  dir = File.dirname(File.expand_path(name))
  $:.unshift(dir) unless $:.first == dir
  if @req
    @req.require(name)
  else
    require(name)
  end
  find_test_cases(already_gathered).each do |t|
    add_suite(suites, t.suite)
  end
ensure
  $:.delete_at $:.rindex(dir)
end