instance method record

# File railties/lib/minitest/rails_plugin.rb, line 37
    def record(result)
      if output_file = ENV["RAILTIES_OUTPUT_FILE"]
        File.open(output_file, "a") do |f|
          # Round-trip for re-serialization
          data = JSON.parse(result.to_json)
          data[:location] = result.location
          f.puts(data.to_json)
        end
      else
        @results << result
      end
    end