anchor.diff:  @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';
  
positive.code:       });
        test('has aria-describedby for character counter and error', () {
          PaperInput input = fixture('required-char-counter');
          print(input.attributes.keys);
          forceXIfStamp(input);
          expect(input.attributes.containsKey('aria-describedby'), isTrue);
          expect(input.attributes['aria-describedby'], equals(
  
negative.code:       });
      });
  
      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'])
  