[Presentation API] return valid WebPresentationConnection object in PresentationReceiver

third_party/WebKit/LayoutTests/presentation/resources/presentation-service-mock.js

 /*
  * Mock implementation of mojo PresentationService.
  */
 
 "use strict";
 
 let presentationServiceMock = loadMojoModules(
     'presentationServiceMock',
     [
       'third_party/WebKit/public/platform/modules/presentation/presentation.mojom',
+      'url/mojo/url.mojom',
       'mojo/public/js/bindings',
     ]).then(mojo => {
-      let [ presentationService, bindings ] = mojo.modules;
+      let [ presentationService, url, bindings ] = mojo.modules;
+
+      class MockPresentationConnection {
+      };
 
       class PresentationServiceMock {
         constructor(interfaceProvider) {
           interfaceProvider.addInterfaceOverrideForTesting(
               presentationService.PresentationService.name,
               handle => this.bindingSet_.addBinding(this, handle));
           this.interfaceProvider_ = interfaceProvider;
           this.pendingResponse_ = null;
           this.bindingSet_ = new bindings.BindingSet(
               presentationService.PresentationService);
         }
 
+        setClient(client) {
+          this.client_ = client;
+        }
+
         startSession(urls) {
           return Promise.resolve({
               sessionInfo: { url: urls[0], id: 'fakesession' },
               error: null,
           });
         }
 
         joinSession(urls) {
           return Promise.resolve({
               sessionInfo: { url: urls[0], id: 'fakeSessionId' },
               error: null,
           });
         }
+
+        onReceiverConnectionAvailable(str_url, id) {
+          var mojo_url = new url.Url();

[mark a. foltz, 2017/02/21 17:47:38]

s/var/const/ here and below.

Also, Javascript variables should be named lowerCamelCase, so:

mojoUrl
controllerConnectionPtr

etc.

https://google.github.io/styleguide/javascriptguide.xml#Naming

[zhaobin, 2017/02/21 19:11:38]

Done.

+          mojo_url.url = str_url;
+          var controller_connection_ptr = new presentationService.PresentationConnectionPtr();
+          var connectionBinding = new bindings.Binding(
+              presentationService.PresentationConnection,
+              new MockPresentationConnection(),
+              bindings.makeRequest(controller_connection_ptr));
+          var receiver_connection_ptr = new presentationService.PresentationConnectionPtr();
+
+          this.client_.onReceiverConnectionAvailable(
+              { url: mojo_url, id: id },
+              controller_connection_ptr,
+              bindings.makeRequest(receiver_connection_ptr));
+        }
       }
 
       return new PresentationServiceMock(mojo.frameInterfaces);
     });
 
 function waitForClick(callback, button) {
   button.addEventListener('click', callback, { once: true });
 
   if (!('eventSender' in window))
     return;
 
   var boundingRect = button.getBoundingClientRect();
   var x = boundingRect.left + boundingRect.width / 2;
   var y = boundingRect.top + boundingRect.height / 2;
 
   eventSender.mouseMoveTo(x, y);
   eventSender.mouseDown();
   eventSender.mouseUp();
 }