refactor EnumerateDevices to make it a persistent request.

content/renderer/media/media_stream_dispatcher_unittest.cc

 // Copyright (c) 2012 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.
 
 #include <string>
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
 #include "content/common/media/media_stream_messages.h"
 #include "content/renderer/media/media_stream_dispatcher.h"
 #include "content/renderer/media/media_stream_dispatcher_eventhandler.h"
 #include "googleurl/src/gurl.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace {
 
 const int kRouteId = 0;
 const int kAudioSessionId = 3;
 const int kVideoSessionId = 5;
 const int kRequestId1 = 10;
 const int kRequestId2 = 20;
 const int kRequestId3 = 30;
 const int kRequestId4 = 40;
+static const char kLabel[] = "test";
 
 class MockMediaStreamDispatcherEventHandler
     : public MediaStreamDispatcherEventHandler,
       public base::SupportsWeakPtr<MockMediaStreamDispatcherEventHandler> {
  public:
   MockMediaStreamDispatcherEventHandler()
       : request_id_(-1),
         audio_failed(false),
         video_failed(false) {}
 
@@ skipping 46 matching lines @@
   std::string label_;
   bool audio_failed;
   bool video_failed;
 
   DISALLOW_COPY_AND_ASSIGN(MockMediaStreamDispatcherEventHandler);
 };
 
 }  // namespace
 
 TEST(MediaStreamDispatcherTest, BasicStream) {
+  scoped_ptr<MessageLoop> message_loop(new MessageLoop());
   scoped_ptr<MediaStreamDispatcher> dispatcher(new MediaStreamDispatcher(NULL));
   scoped_ptr<MockMediaStreamDispatcherEventHandler>
       handler(new MockMediaStreamDispatcherEventHandler);
   media_stream::StreamOptions components(true, true);
   GURL security_origin;
 
   int ipc_request_id1 = dispatcher->next_ipc_id_;
   dispatcher->GenerateStream(kRequestId1, handler.get()->AsWeakPtr(),
                              components, security_origin);
   int ipc_request_id2 = dispatcher->next_ipc_id_;
@@ skipping 55 matching lines @@
   EXPECT_EQ(dispatcher->video_session_id(stream_label1, 0),
             media_stream::StreamDeviceInfo::kNoId);
   EXPECT_EQ(dispatcher->label_stream_map_.size(), size_t(0));
 
   // Verify that the request have been completed.
   EXPECT_EQ(dispatcher->label_stream_map_.size(), size_t(0));
   EXPECT_EQ(dispatcher->requests_.size(), size_t(0));
 }
 
 TEST(MediaStreamDispatcherTest, BasicVideoDevice) {
+  scoped_ptr<MessageLoop> message_loop(new MessageLoop());
   scoped_ptr<MediaStreamDispatcher> dispatcher(new MediaStreamDispatcher(NULL));
   scoped_ptr<MockMediaStreamDispatcherEventHandler>
-      handler(new MockMediaStreamDispatcherEventHandler);
+      handler1(new MockMediaStreamDispatcherEventHandler);
+  scoped_ptr<MockMediaStreamDispatcherEventHandler>
+      handler2(new MockMediaStreamDispatcherEventHandler);
   GURL security_origin;
 
   int ipc_request_id1 = dispatcher->next_ipc_id_;
-  dispatcher->EnumerateDevices(kRequestId1, handler.get()->AsWeakPtr(),
+  dispatcher->EnumerateDevices(kRequestId1, handler1.get()->AsWeakPtr(),
                                content::MEDIA_STREAM_DEVICE_TYPE_VIDEO_CAPTURE,
                                security_origin);
   int ipc_request_id2 = dispatcher->next_ipc_id_;
   EXPECT_NE(ipc_request_id1, ipc_request_id2);
-  dispatcher->EnumerateDevices(kRequestId2, handler.get()->AsWeakPtr(),
+  dispatcher->EnumerateDevices(kRequestId2, handler2.get()->AsWeakPtr(),
                                content::MEDIA_STREAM_DEVICE_TYPE_VIDEO_CAPTURE,
                                security_origin);
-  EXPECT_EQ(dispatcher->requests_.size(), size_t(2));
+  EXPECT_EQ(dispatcher->video_enumeration_state_.requests.size(), size_t(2));
 
   media_stream::StreamDeviceInfoArray video_device_array(1);
   media_stream::StreamDeviceInfo video_device_info;
   video_device_info.name = "Camera";
   video_device_info.device_id = "device_path";
   video_device_info.stream_type =
       content::MEDIA_STREAM_DEVICE_TYPE_VIDEO_CAPTURE;
   video_device_info.session_id = kVideoSessionId;
   video_device_array[0] = video_device_info;
 
-  // Complete the enumeration of request 1.
+  // Complete the enumeration request and all requesters should receive reply.
   dispatcher->OnMessageReceived(MediaStreamMsg_DevicesEnumerated(
-      kRouteId, ipc_request_id1, video_device_array));
-  EXPECT_EQ(handler->request_id_, kRequestId1);
+      kRouteId, ipc_request_id1, kLabel, video_device_array));
+  EXPECT_EQ(handler1->request_id_, kRequestId1);
+  EXPECT_EQ(handler2->request_id_, kRequestId2);
 
-  // Complete the enumeration of request 2.
-  dispatcher->OnMessageReceived(MediaStreamMsg_DevicesEnumerated(
-      kRouteId, ipc_request_id2, video_device_array));
-  EXPECT_EQ(handler->request_id_, kRequestId2);
-
-  EXPECT_EQ(dispatcher->requests_.size(), size_t(0));
+  EXPECT_EQ(dispatcher->video_enumeration_state_.requests.size(), size_t(2));
   EXPECT_EQ(dispatcher->label_stream_map_.size(), size_t(0));
 
   int ipc_request_id3 = dispatcher->next_ipc_id_;
-  dispatcher->OpenDevice(kRequestId3, handler.get()->AsWeakPtr(),
+  dispatcher->OpenDevice(kRequestId3, handler1.get()->AsWeakPtr(),
                          video_device_info.device_id,
                          content::MEDIA_STREAM_DEVICE_TYPE_VIDEO_CAPTURE,
                          security_origin);
   int ipc_request_id4 = dispatcher->next_ipc_id_;
   EXPECT_NE(ipc_request_id3, ipc_request_id4);
-  dispatcher->OpenDevice(kRequestId4, handler.get()->AsWeakPtr(),
+  dispatcher->OpenDevice(kRequestId4, handler1.get()->AsWeakPtr(),
                          video_device_info.device_id,
                          content::MEDIA_STREAM_DEVICE_TYPE_VIDEO_CAPTURE,
                          security_origin);
   EXPECT_EQ(dispatcher->requests_.size(), size_t(2));
 
   // Complete the OpenDevice of request 1.
   std::string stream_label1 = std::string("stream1");
   dispatcher->OnMessageReceived(MediaStreamMsg_DeviceOpened(
       kRouteId, ipc_request_id3, stream_label1, video_device_info));
-  EXPECT_EQ(handler->request_id_, kRequestId3);
+  EXPECT_EQ(handler1->request_id_, kRequestId3);
 
   // Complete the OpenDevice of request 2.
   std::string stream_label2 = std::string("stream2");
   dispatcher->OnMessageReceived(MediaStreamMsg_DeviceOpened(
       kRouteId, ipc_request_id4, stream_label2, video_device_info));
-  EXPECT_EQ(handler->request_id_, kRequestId4);
+  EXPECT_EQ(handler1->request_id_, kRequestId4);
 
   EXPECT_EQ(dispatcher->requests_.size(), size_t(0));
   EXPECT_EQ(dispatcher->label_stream_map_.size(), size_t(2));
 
   // Check the video_session_id.
   EXPECT_EQ(dispatcher->video_session_id(stream_label1, 0), kVideoSessionId);
   EXPECT_EQ(dispatcher->video_session_id(stream_label2, 0), kVideoSessionId);
 
   // Stop stream2.
   dispatcher->StopStream(stream_label2);
   EXPECT_EQ(dispatcher->video_session_id(stream_label2, 0),
             media_stream::StreamDeviceInfo::kNoId);
 
   // Stop stream1.
   dispatcher->StopStream(stream_label1);
   EXPECT_EQ(dispatcher->video_session_id(stream_label1, 0),
             media_stream::StreamDeviceInfo::kNoId);
   EXPECT_EQ(dispatcher->label_stream_map_.size(), size_t(0));
 
   // Verify that the request have been completed.
   EXPECT_EQ(dispatcher->label_stream_map_.size(), size_t(0));
   EXPECT_EQ(dispatcher->requests_.size(), size_t(0));
 }
 
 TEST(MediaStreamDispatcherTest, TestFailure) {
+  scoped_ptr<MessageLoop> message_loop(new MessageLoop());
   scoped_ptr<MediaStreamDispatcher> dispatcher(new MediaStreamDispatcher(NULL));
   scoped_ptr<MockMediaStreamDispatcherEventHandler>
       handler(new MockMediaStreamDispatcherEventHandler);
   media_stream::StreamOptions components(true, true);
   GURL security_origin;
 
   // Test failure when creating a stream.
   int ipc_request_id1 = dispatcher->next_ipc_id_;
   dispatcher->GenerateStream(kRequestId1, handler.get()->AsWeakPtr(),
                              components, security_origin);
@@ skipping 46 matching lines @@
   dispatcher->OnMessageReceived(
       MediaStreamHostMsg_AudioDeviceFailed(kRouteId, stream_label1, 0));
   EXPECT_EQ(handler->audio_failed, true);
 
   // Stop stream1.
   dispatcher->StopStream(stream_label1);
   EXPECT_EQ(dispatcher->label_stream_map_.size(), size_t(0));
 }
 
 TEST(MediaStreamDispatcherTest, CancelGenerateStream) {
+  scoped_ptr<MessageLoop> message_loop(new MessageLoop());
   scoped_ptr<MediaStreamDispatcher> dispatcher(new MediaStreamDispatcher(NULL));
   scoped_ptr<MockMediaStreamDispatcherEventHandler>
       handler(new MockMediaStreamDispatcherEventHandler);
   media_stream::StreamOptions components(true, true);
   int ipc_request_id1 = dispatcher->next_ipc_id_;
 
   dispatcher->GenerateStream(kRequestId1, handler.get()->AsWeakPtr(),
                              components, GURL());
   dispatcher->GenerateStream(kRequestId2, handler.get()->AsWeakPtr(),
                              components, GURL());
@@ skipping 20 matching lines @@
   video_device_array[0] = video_device_info;
 
   std::string stream_label1 = "stream1";
   dispatcher->OnMessageReceived(MediaStreamMsg_StreamGenerated(
       kRouteId, ipc_request_id1, stream_label1,
       audio_device_array, video_device_array));
   EXPECT_EQ(handler->request_id_, kRequestId1);
   EXPECT_EQ(handler->label_, stream_label1);
   EXPECT_EQ(0u, dispatcher->requests_.size());
 }