[Dart article] Async code exceptions 6

dart_async_axceptions6.dart

await Future.delayed(Duration(seconds: 1), () {
    print('Its fie so far');
  }).then((value) {
    print('Then started');
    throw 'random exception';
  }).catchError((error) {
    print('Cant divide to zero');
  }, test: (e) => e is IntegerDivisionByZeroException).catchError((error) {
    print('All other exceptions: $error');
  }, test: (e) => true).whenComplete(() {
    print('Clean-up done');
  });