anchor.diff:        });
       });
   
  -    group('focused styling (integration test)', () {
  -      test('underline is colored when input is focused', () {
  +    group('focused styling (integration test)', ()  {
  +      test('underline is colored when input is focused', () async {
           var input = fixture('basic');
           var container = Polymer
               .dom(input.jsElement['root'])
  
positive.code:             .querySelector('.underline');
          expect(line.classes.contains('is-highlighted'), isFalse);
          focus(input.inputElement);
          window.requestAnimationFrame((done) {
            expect(line.classes.contains('is-highlighted'), isTrue);
          });
        });
      });
  
  
negative.code: @TestOn('browser')
  library polymer_elements.test.paper_input_test;
  
  import 'dart:async';
  import 'dart:html';
  import 'package:polymer/polymer.dart';
  import 'package:test/test.dart';
  