add server.status notification

pkg/analysis_server/test/analysis_server_test.dart

Index: pkg/analysis_server/test/analysis_server_test.dart
diff --git a/pkg/analysis_server/test/analysis_server_test.dart b/pkg/analysis_server/test/analysis_server_test.dart
index d730201bdf6a7420cdabc59319877ef79ac76212..28e5704f6363add23b1f1ad5a9d7d9a70316ee2a 100644
--- a/pkg/analysis_server/test/analysis_server_test.dart
+++ b/pkg/analysis_server/test/analysis_server_test.dart
@@ -80,18 +80,36 @@ class AnalysisServerTest {
         new AnalysisResult(null, 0, null, 0));
     return pumpEventQueue().then((_) {
       context.getLogs(callsTo('performAnalysisTask')).verify(happenedExactly(2));
-      var notifications = channel.notificationsReceived;
-      expect(notifications, hasLength(2));
+      List<Notification> notifications = channel.notificationsReceived;
+      expect(notifications, hasLength(4));
+
       expect(notifications[0].event, equals('server.connected'));
-      expect(notifications[1].event, equals('context.errors'));
-      expect(notifications[1].params['source'], equals('foo.dart'));
-      expect(notifications[1].params['contextId'], equals('context-27'));
-      List<AnalysisError> errors = notifications[1].params['errors'];
+
+      assertStatusNotification(notifications[1], true);
+
+      expect(notifications[2].event, equals('context.errors'));
+      expect(notifications[2].params['source'], equals('foo.dart'));
+      expect(notifications[2].params['contextId'], equals('context-27'));
+      List<AnalysisError> errors = notifications[2].params['errors'];
       expect(errors, hasLength(1));
       expect(errors[0], equals(AnalysisServer.errorToJson(analysisError)));
+
+      assertStatusNotification(notifications[3], false);
     });
   }
 
+  static void assertStatusNotification(Notification notification, bool expectAnalyzing) {
+    expect(notification.event, equals('server.status'));
+    Map<String, Object> analysis = notification.params['analysis'];
+    expect(analysis['analyzing'], expectAnalyzing);
+    expect(analysis.containsKey('analysisTarget'), expectAnalyzing);
+    if (expectAnalyzing) {
+      var analysisTarget = analysis['analysisTarget'];
+      expect((analysisTarget is String), isTrue);
+      expect(analysisTarget.length > 0, isTrue);
+    }
+  }
+
   static Future addContextToWorkQueue_twice() {
     // The context should only be asked to perform its analysis task once.
     MockAnalysisContext context = new MockAnalysisContext();