Generate an error for active connections when the HTTP client is shutdown

pkg/http/test/request_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 request_test;
 
 import 'dart:io';
 
 import '../../unittest/lib/unittest.dart';
 import '../lib/http.dart' as http;
 import '../lib/src/utils.dart';
 import 'utils.dart';
 
 void main() {
   test('.send', () {
-    print("This test is known to be flaky, please ignore "
-          "(debug prints below added by sgjesse@)");
-    print(".send test starting server...");
     startServer();
-    print(".send test server running");
 
     var request = new http.Request('POST', serverUrl);
     request.body = "hello";
     var future = request.send().chain((response) {
-      print(".send test response received");
       expect(response.statusCode, equals(200));
       return consumeInputStream(response.stream);
     }).transform((bytes) => new String.fromCharCodes(bytes));
     future.onComplete((_) {
-      print(".send test stopping server...");
       stopServer();
-      print(".send test server stopped");
     });
 
     expect(future, completion(parse(equals({
       'method': 'POST',
       'path': '/',
       'headers': {
         'content-type': ['text/plain; charset=UTF-8'],
         'content-length': ['5']
       },
       'body': 'hello'
     }))));
-    print(".send test started");
   });
 
   group('#contentLength', () {
     test('is computed from bodyBytes', () {
       var request = new http.Request('POST', dummyUrl);
       request.bodyBytes = [1, 2, 3, 4, 5];
       expect(request.contentLength, equals(5));
       request.bodyBytes = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
       expect(request.contentLength, equals(10));
     });
@@ skipping 288 matching lines @@
     });
 
     test("can't be called twice", () {
       var request = new http.Request('POST', dummyUrl);
       request.finalize();
       expect(request.finalize, throwsStateError);
     });
   });
 }