Upgrading tests with unittest deprecations

tests/isolate/mint_maker_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.
 
 library MintMakerTest;
 import 'dart:async';
 import 'dart:isolate';
 import 'package:unittest/unittest.dart';
 import "remote_unittest_helper.dart";
 
@@ skipping 132 matching lines @@
   MintMakerWrapper._(this._port);
 
   void makeMint(handleMint(MintWrapper mint)) {
     ReceivePort reply = new ReceivePort();
     reply.first.then((SendPort mint) { handleMint(new MintWrapper(mint)); });
     _port.send(reply.sendPort);
   }
 }
 
 _checkBalance(PurseWrapper wrapper, expected) {
-  wrapper.queryBalance(expectAsync1((int balance) {
+  wrapper.queryBalance(expectAsync((int balance) {
     expect(balance, equals(expected));
   }));
 }
 
 void main([args, port]) {
   if (testRemote(main, port)) return;
   test("creating purse, deposit, and query balance", () {
-    MintMakerWrapper.create().then(expectAsync1((mintMaker) {
-      mintMaker.makeMint(expectAsync1((MintWrapper mint) {
-        mint.createPurse(100, expectAsync1((PurseWrapper purse) {
+    MintMakerWrapper.create().then(expectAsync((mintMaker) {
+      mintMaker.makeMint(expectAsync((MintWrapper mint) {
+        mint.createPurse(100, expectAsync((PurseWrapper purse) {
           _checkBalance(purse, 100);
-          purse.sproutPurse(expectAsync1((PurseWrapper sprouted) {
+          purse.sproutPurse(expectAsync((PurseWrapper sprouted) {
             _checkBalance(sprouted, 0);
             _checkBalance(purse, 100);
 
             sprouted.deposit(purse, 5);
             _checkBalance(sprouted, 0 + 5);
             _checkBalance(purse, 100 - 5);
 
             sprouted.deposit(purse, 42);
             _checkBalance(sprouted, 0 + 5 + 42);
             _checkBalance(purse, 100 - 5 - 42);
           }));
         }));
       }));
     }));
   });
 }