Experimental `getDiagnostics` request (#24480).

pkg/analysis_server/test/integration/integration_test_methods.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.
 //
 // This file has been automatically generated.  Please do not edit it manually.
 // To regenerate the file, use the script
 // "pkg/analysis_server/tool/spec/generate_files".
 
 /**
  * Convenience methods for running integration tests
@@ skipping 1611 matching lines @@
    *   omitted if the file is not an HTML file.
    */
   Stream<ExecutionLaunchDataParams> onExecutionLaunchData;
 
   /**
    * Stream controller for [onExecutionLaunchData].
    */
   StreamController<ExecutionLaunchDataParams> _onExecutionLaunchData;
 
   /**
+   * Return server diagnostics.
+   *
+   * Returns
+   *
+   * contexts ( List<ContextData> )
+   *
+   *   The list of analysis contexts.
+   */
+  Future<ExperimentalGetDiagnosticsResult> sendExperimentalGetDiagnostics() {
+    return server.send("experimental.getDiagnostics", null)
+        .then((result) {
+      ResponseDecoder decoder = new ResponseDecoder(null);
+      return new ExperimentalGetDiagnosticsResult.fromJson(decoder, 'result', result);
+    });
+  }
+
+  /**
    * Initialize the fields in InttestMixin, and ensure that notifications will
    * be handled.
    */
   void initializeInttestMixin() {
     _onServerConnected = new StreamController<ServerConnectedParams>(sync: true);
     onServerConnected = _onServerConnected.stream.asBroadcastStream();
     _onServerError = new StreamController<ServerErrorParams>(sync: true);
     onServerError = _onServerError.stream.asBroadcastStream();
     _onServerStatus = new StreamController<ServerStatusParams>(sync: true);
     onServerStatus = _onServerStatus.stream.asBroadcastStream();
@@ skipping 101 matching lines @@
       case "execution.launchData":
         expect(params, isExecutionLaunchDataParams);
         _onExecutionLaunchData.add(new ExecutionLaunchDataParams.fromJson(decoder, 'params', params));
         break;
       default:
         fail('Unexpected notification: $event');
         break;
     }
   }
 }