anchor.diff:        });
         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(
  
positive.code: @TestOn('browser')
  library polymer_elements.test.paper_input_test;
  
  import 'dart:html';
  import 'package:polymer/polymer.dart';
  import 'package:test/test.dart';
  
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'])
  