anchor.diff:  
       invocationCounter = 0;
       element.dispatchEvent(event);
  -    expect(invocationCounter, isZero);
  +    expect(invocationCounter, 0);
   
       var provider = new EventStreamProvider<Event>('test');
   
  
positive.code:     // rely on this. We therefore wrap it into an expectAsync.
      runZoned(expectAsync0(() {
        var zone = Zone.current;
        expect(zone, isNot(equals(Zone.root)));
  
        StreamSubscription<Event> sub;
  
  
negative.code: 
  import 'dart:async';
  import 'dart:html';
  import 'package:async_helper/async_minitest.dart';
  import 'package:expect/expect.dart';
  
  main() {
    test('TimeStamp', () {
  