DevTools: create test infrastructure so devtools drives the test

third_party/WebKit/Source/devtools/front_end/sdk/Connections.js

 // Copyright (c) 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 /**
  * @implements {Protocol.InspectorBackend.Connection}
  * @unrestricted
  */
 SDK.MainConnection = class {
   /**
    * @param {!Protocol.InspectorBackend.Connection.Params} params
@@ skipping 193 matching lines @@
    * @param {string} message
    */
   sendMessage(message) {
     setTimeout(this._respondWithError.bind(this, message), 0);
   }
 
   /**
    * @param {string} message
    */
   _respondWithError(message) {
+    if (Host.isUnderTest())

[dgozman, 2017/06/19 22:55:52]

Why this?

[chenwilliam, 2017/06/19 23:48:18]

I accidentally ran unit tests w/ integration test (see earlier comment).
removed.

+      return;
+
     var messageObject = JSON.parse(message);
     var error = {
       message: 'This is a stub connection, can\'t dispatch message.',
       code: Protocol.InspectorBackend.DevToolsStubErrorCode,
       data: messageObject
     };
     this._onMessage.call(null, {id: messageObject.id, error: error});
   }
 
   /**
    * @override
    * @return {!Promise}
    */
   disconnect() {
     this._onDisconnect.call(null, 'force disconnect');
     this._onDisconnect = null;
     this._onMessage = null;
     return Promise.resolve();
   }
 };