hint.txt

Did you try to use stream.first?

Did you try returning "Top User is: $name"?

Did you try to use future.asStream()?

Check the classes Stream and Future for the method specifications.

main.dart

Future<String> topUser(Stream<String> stream) async {
  // implement this method
}

Stream<String> usernameAsStream(Future<String> username) {
  // implement this method
}

solution.dart

Future<String> topUser(Stream<String> stream) async {
  var user = await stream.first;
  return 'Top User is: $user';
}

Stream<String> usernameAsStream(Future<String> username) {
  return username.asStream();
}

test.dart

void main() async {
  try {
    final stream = Stream.fromIterable(['First', 'Second']);
    final value = await topUser(stream);
    if (value != 'Top User is: First') {
      _result(false,
          ['Something went wrong! The result of `topUser` is incorrect.']);
      return;
    }
  } catch (error) {
    _result(false, [
      'Something went wrong! Tried calling `firstEvent` but got exception: $error'
    ]);
    return;
  }

  try {
    final value = await usernameAsStream(Future.value('First')).single;
    if (value != 'First') {
      _result(false, [
        'Something went wrong! The result of `usernameAsStream` is incorrect.'
      ]);
      return;
    }
  } catch (error) {
    _result(false, [
      'Something went wrong! Tried calling `usernameAsStream` but got exception: $error'
    ]);
    return;
  }

  _result(true);
}