Update tests for pkg/http for new library

pkg/http/test/client_test.dart

-// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// 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 client_test;
 
 import 'dart:io';
 
 import 'package:unittest/unittest.dart';
 import 'package:http/http.dart' as http;
 import 'package:http/src/utils.dart';
 import 'utils.dart';
 
 void main() {
   setUp(startServer);
   tearDown(stopServer);
 
   test('#send a StreamedRequest', () {
     var client = new http.Client();
     var request = new http.StreamedRequest("POST", serverUrl);
     request.headers[HttpHeaders.CONTENT_TYPE] =
       'application/json; charset=utf-8';
 
     var future = client.send(request).then((response) {
       expect(response.request, equals(request));
       expect(response.statusCode, equals(200));
       return consumeInputStream(response.stream);
-    }).then((bytes) => new String.fromCharCodes(bytes));
+    }).then(expectAsync1((bytes) => new String.fromCharCodes(bytes)));
     future.catchError((_) {}).then((_) => client.close());
 
     future.then(expectAsync1((content) {
       expect(content, parse(equals({
         'method': 'POST',
         'path': '/',
         'headers': {
           'content-type': ['application/json; charset=utf-8'],
           'transfer-encoding': ['chunked']
         },
         'body': '{"hello": "world"}'
       })));
     }));
 
     request.stream.writeString('{"hello": "world"}');
     request.stream.close();
   });
 }