Stop sending unwanted status and fix integration tests

pkg/analysis_server/test/integration/integration_tests.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.analysis;
 
 import 'dart:async';
 import 'dart:collection';
 import 'dart:convert';
 import 'dart:io';
@@ skipping 101 matching lines @@
    * multiple times in one test; each time it is used it will wait afresh for
    * analysis to finish.
    */
   Future get analysisFinished {
     Completer completer = new Completer();
     StreamSubscription subscription;
     // This will only work if the caller has already subscribed to
     // SERVER_STATUS (e.g. using sendServerSetSubscriptions(['STATUS']))
     expect(_subscribedToServerStatus, isTrue);
     subscription = onServerStatus.listen((ServerStatusParams params) {
-      if (!params.analysis.isAnalyzing) {
+      if (params.analysis != null && !params.analysis.isAnalyzing) {
         completer.complete(params);
         subscription.cancel();
       }
     });
     return completer.future;
   }
 
   /**
    * Print out any messages exchanged with the server.  If some messages have
    * already been exchanged with the server, they are printed out immediately.
@@ skipping 733 matching lines @@
   void populateMismatches(item, List<MismatchDescriber> mismatches);
 
   /**
    * Create a [MismatchDescriber] describing a mismatch with a simple string.
    */
   MismatchDescriber simpleDescription(String description) =>
       (Description mismatchDescription) {
     mismatchDescription.add(description);
   };
 }