Wait for "server.connected" notification before beginning integration tests.

pkg/analysis_server/test/integration/server_domain_int_test.dart

 // Copyright (c) 2014, 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 test.integration.server.domain;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/constants.dart';
 import 'package:analysis_testing/reflective_tests.dart';
@@ skipping 64 matching lines @@
     // TODO(paulberry): verify that if an invalid service is specified, the
     // current subscriptions are unchanged.
     return server_setSubscriptions(['bogus']).then((_) {
       fail('setSubscriptions should have produced an error');
     }, onError: (error) {
       // The expected error occurred.
     });
   }
 
   test_connected() {
-    Completer receivedConnected = new Completer();
-    server.onNotification(SERVER_CONNECTED).listen((params) {
-      expect(receivedConnected.isCompleted, isFalse);
-      receivedConnected.complete();
-      expect(params, isNull);
-    });
-    return receivedConnected.future;
+    expect(serverConnectedParams, isNull);
   }
 
   test_error() {
     // TODO(paulberry): how do we test the 'server.error' notification given
     // that this notification should only occur in the event of a server bug?
   }
 
   test_status() {
     // TODO(paulberry): spec says that server.status is not subscribed to by
     // default, but currently it's behaving as though it is.
@@ skipping 25 matching lines @@
     return analysisBegun.future.then((_) {
       expect(analysisFinished.isCompleted, isFalse);
       return analysisFinished.future;
     });
   }
 }
 
 main() {
   runReflectiveTests(ServerDomainIntegrationTest);
 }