using unittest via package import

tests/html/element_offset_test.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library element_offset_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:async';
 import 'dart:html';
 
 main() {
   useHtmlIndividualConfiguration();
   void initPage() {
     var level1 = new UListElement()
       ..classes.add('level-1')
       ..children.add(new LIElement()..innerHtml = 'I');
     var itemii = new LIElement()
@@ skipping 112 matching lines @@
       expect(baz.documentOffset.y, 608);
 
       expect(qux.documentOffset.x, 8);
       expect(qux.documentOffset.y, inInclusiveRange(221, 240));
 
       expect(quux.documentOffset.x, 8);
       expect(quux.documentOffset.y, inInclusiveRange(221, 240));
     });
   });
 }