Update to test package, make test work on dart2js.

test/queue_list_test.dart

 // Copyright (c) 2014, 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.
 
 import "package:collection/collection.dart";
-import "package:unittest/unittest.dart";
+import "package:test/test.dart";
 
 void main() {
   group("new QueueList()", () {
     test("creates an empty QueueList", () {
       expect(new QueueList(), isEmpty);
     });
 
     test("takes an initial capacity", () {
       expect(new QueueList(100), isEmpty);
     });
@@ skipping 248 matching lines @@
   }
   for (var i = 5; i < 8; i++) {
     queue.addLast(i);
   }
   return queue;
 }
 
 /// Returns a matcher that expects that a closure throws a
 /// [ConcurrentModificationError].
 final throwsConcurrentModificationError = throwsA(
-    new isInstanceOf<ConcurrentModificationError>(
-        "ConcurrentModificationError"));
+    new isInstanceOf<ConcurrentModificationError>());