anchor.diff:        //newFileRead.dump();
   
         expect(fileRead, newFileRead);
  +      new Directory(outDataPath).createSync(recursive: true);
         new File(outDataFilenamePath(filename)).writeAsBytesSync(newData);
   
         //MidiWriter midiWriter = new MidiWriter();
  
positive.code: 
        file.addTrack(track);
  
        new File(outDataFilenamePath('c-d-e.midi'))
            .writeAsBytesSync(FileWriter.fileData(file));
      });
  
negative.code:     }, skip: true);
      */
  
      test('c d e out demo file', () async {
        MidiFile file = new MidiFile();
        file.fileFormat = MidiFile.FORMAT_MULTI_TRACK;
        file.ppq = 240;
  