using unittest via package import

tests/html/node_test.dart

 // Copyright (c) 2011, 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 NodeTest;
-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';
 import 'dart:svg' as svg;
 
 Node makeNode() => new Element.tag('div');
 Node makeNodeWithChildren() =>
   new Element.html("<div>Foo<br/><!--baz--></div>");
 
 void testUnsupported(String name, void f()) {
   test(name, () {
     expect(f, throwsUnsupportedError);
@@ skipping 326 matching lines @@
     });
 
     test('TreeWalker', () {
       var root = makeNodeWithChildren();
       var treeWalker = new TreeWalker(root, NodeFilter.SHOW_COMMENT);
       expect(treeWalker.nextNode(), isComment);
       expect(treeWalker.nextNode(), isNull);
     });
   });
 }