anchor.diff:                        expect(success, isTrue);
                         serial.close();
                      });
  +    });
  +
  +    test('Defaut baudrate 9600', () {
  +      var serial =  new SerialPort(dummySerialPort.path);
  +      expect(serial.baudrate, 9600);
       });
   
       test('Fail with unkwnon portname', (){
  
positive.code: import 'dart:math';
  
  void main() {
    var dummySerialPort;
    var random = new Random();
    group('Serial port', () {
      setUp(() {
        //dummySerialPort = new File("dummySerialPort-${random.nextInt(999)}.tmp").createSync();
        dummySerialPort = new File("dummySerialPort.tmp");
        return dummySerialPort.create();
      });
  
negative.code:                    .then((success) =>  expect(success, isTrue));
      });
  
      test('Just write', () {
        var serial =  new SerialPort(dummySerialPort.path);
        serial.open().then((_) => serial.write("Hello"))
  