class Rails::TestUnit::Filter

def ===(method)
  return unless @runnable.method_defined?(method)
  if @line_range
    test_file, test_range = definition_for(@runnable.instance_method(method))
    test_file == @file && @line_range.overlaps?(test_range)
  else
    @runnable.instance_method(method).source_location.first == @file
  end
end