using unittest via package import

tests/html/input_element_test.dart

 library input_element_test;
-import '../../pkg/unittest/lib/unittest.dart';
-import '../../pkg/unittest/lib/html_individual_config.dart';
+import 'package:unittest/unittest.dart';
+import 'package:unittest/html_individual_config.dart';
 import 'dart:html';
 
 void check(InputElement element, String type, [bool supported = true]) {
   expect(element is InputElement, true);
   if (supported) {
     expect(element.type, type);
   } else {
     expect(element.type, 'text');
   }
 }
@@ skipping 165 matching lines @@
   });
 
   group('attributes', () {
     test('valueSetNull', () {
       final e = new TextInputElement();
       e.value = null;
       expect(e.value, '');
     });
   });
 }