anchor.diff:      expect(currentUrl, 'https://www.google.com/');
     });
   }
  +
  +Future<void> pumpWidget(Widget widget) {
  +  runApp(widget);
  +  return WidgetsBinding.instance.endOfFrame;
  +}
  
positive.code:   test('loadUrl', () async {
      final Completer<WebViewController> controllerCompleter =
          Completer<WebViewController>();
      runApp(
        Directionality(
          textDirection: TextDirection.ltr,
          child: WebView(
  
negative.code:   test('initalUrl', () async {
      final Completer<WebViewController> controllerCompleter =
          Completer<WebViewController>();
      await pumpWidget(
        Directionality(
          textDirection: TextDirection.ltr,
          child: WebView(
  