using unittest via package import

tests/html/async_test.dart

 library async_test;
 
-import '../../pkg/unittest/lib/unittest.dart';
-import '../../pkg/unittest/lib/html_config.dart';
+import 'package:unittest/unittest.dart';
+import 'package:unittest/html_config.dart';
 
 import 'dart:async';
 import 'dart:isolate';
 import 'dart:html';
 
 oneshotTimerIsolate(message) {
   var command = message[0];
   var replyTo = message[1];
   expect(command, 'START');
   new Timer(const Duration(milliseconds: 10), () {
@@ skipping 65 matching lines @@
                                ['START', response.sendPort]);
     expect(remote.then((_) => response.first), completion('DONE'));
   });
   test('cancellation in pure isolate', () {
     var response = new ReceivePort();
     var remote = Isolate.spawn(cancellingIsolate,
                                ['START', response.sendPort]);
     expect(remote.then((_) => response.first), completion('DONE'));
   });
 }