pkg/unittest: test cleanup

pkg/unittest/test/expect_async_args_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 unittestTest;
 
+import 'dart:async';
 import 'dart:isolate';
-import 'dart:async';
+
 import 'package:unittest/unittest.dart';
 
-part 'unittest_test_utils.dart';
+part 'utils.dart';
 
 var testFunction = (TestConfiguration testConfig) {
   List<int> _getArgs([a = 0, b = 0, c = 0, d = 0, e = 0, f = 0]) {
     testConfig.count++;
     return [a, b, c, d, e, f];
   }
 
   test('expect async args', () {
     expect(expectAsync(_getArgs)(), [0, 0, 0, 0, 0, 0]);
     expect(expectAsync(_getArgs)(5), [5, 0, 0, 0, 0, 0]);
     expect(expectAsync(_getArgs)(1, 2, 3, 4, 5, 6), [1, 2, 3, 4, 5, 6]);
   });
 
   test('invoked with too many args', () {
     expectAsync(_getArgs)(1, 2, 3, 4, 5, 6, 7);
   });
 
   test('created with too many args', () {
     expectAsync((a1, a2, a3, a4, a5, a6, a7) {
       testConfig.count++;
     })();
   });
 };
 
 final expected = startsWith('1:0:2:3:3:::null:expect async args::'
     'invoked with too many args:Test failed:');