Upgrading tests with unittest deprecations

tests/isolate/isolate_complex_messages_test.dart

 // Copyright (c) 2012, 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.
 
 // Dart test program for testing isolate communication with
 // complex messages.
 
 library IsolateComplexMessagesTest;
 import 'dart:isolate';
 import 'package:unittest/unittest.dart';
 import "remote_unittest_helper.dart";
 
 void main([args, port]) {
   if (testRemote(main, port)) return;
   test("complex messages are serialized correctly", () {
     ReceivePort local = new ReceivePort();
     Isolate.spawn(logMessages, local.sendPort);
-    var done = expectAsync0((){});
-    local.listen(expectAsync1((msg) {
+    var done = expectAsync((){});
+    local.listen(expectAsync((msg) {
       switch (msg[0]) {
         case "init":
           var remote = msg[1];
           remote.send(1);
           remote.send("Hello");
           remote.send("World");
           remote.send(const [null, 1, 2, 3, 4]);
           remote.send(const [1, 2.0, true, false, 0xffffffffff]);
           remote.send(const ["Hello", "World", 0xffffffffff]);
           // Shutdown the LogRunner.
@@ skipping 48 matching lines @@
           expect(message.length, 3);
           expect(message[0], "Hello");
           expect(message[1], "World");
           expect(message[2], 0xffffffffff);
           break;
       }
       count++;
     }
   });
 }