# File lib/autotest.rb, line 393
  def tests_for_file(filename)
    result = @test_mappings.find { |file_re, ignored| filename =~ file_re }
    result = result.nil? ? [] : Array(result.last.call(filename, $~))

    @output.puts "Dunno! #{filename}" if $TESTING and result.empty?

    result.sort.uniq
  end