Fix NPE in tests.

pkg/analysis_server/test/analysis_server_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.analysis_server;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analysis_server/src/constants.dart';
@@ skipping 266 matching lines @@
 
   Future test_serverStatusNotifications() {
     MockAnalysisContext context = new MockAnalysisContext('context');
     MockSource source = new MockSource('source');
     when(source.fullName).thenReturn('foo.dart');
     when(source.isInSystemLibrary).thenReturn(false);
     ChangeNoticeImpl notice = new ChangeNoticeImpl(source);
     notice.setErrors([], new LineInfo([0]));
     AnalysisResult firstResult = new AnalysisResult([notice], 0, '', 0);
     AnalysisResult lastResult = new AnalysisResult(null, 1, '', 1);
+    when(context.analysisOptions).thenReturn(new AnalysisOptionsImpl());
     when(
         context.performAnalysisTask).thenReturnList(
             [firstResult, firstResult, firstResult, lastResult]);
     server.serverServices.add(ServerService.STATUS);
     server.schedulePerformAnalysisOperation(context);
     // Pump the event queue to make sure the server has finished any
     // analysis.
     return pumpEventQueue().then((_) {
       List<Notification> notifications = channel.notificationsReceived;
       expect(notifications, isNotEmpty);
@@ skipping 35 matching lines @@
   @override
   Response handleRequest(Request request) {
     if (request.method == 'echo') {
       return new Response(request.id, result: {
         'echo': true
       });
     }
     return null;
   }
 }