anchor.diff:      });
     });
     group('chunked', () {
  +    @isTestGroup
       void chunkedTest(
           String title,
           String input,
  
positive.code: void main() {
    group('iterable', () {
      group('events', () {
        test('empty', () {
          final iterator = parseEvents('').iterator;
          assertComplete(iterator);
        });
  
negative.code: import 'dart:convert';
  import 'dart:math' show min, Random;
  
  import 'package:meta/meta.dart';
  import 'package:test/test.dart';
  import 'package:xml/xml.dart';
  import 'package:xml/xml_events.dart';
  