content/browser/renderer_host/media/media_stream_dispatcher_host_unittest.cc - platform/external/chromium_org - Git at Google

 // 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/bind.h"
 #include "base/callback_helpers.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "content/browser/browser_thread_impl.h"
 #include "content/browser/renderer_host/media/media_stream_dispatcher_host.h"
 #include "content/browser/renderer_host/media/media_stream_manager.h"
 #include "content/browser/renderer_host/media/media_stream_ui_proxy.h"
 #include "content/browser/renderer_host/media/video_capture_manager.h"
 #include "content/common/media/media_stream_messages.h"
 #include "content/common/media/media_stream_options.h"
 #include "content/public/test/mock_resource_context.h"
 #include "content/public/test/test_browser_thread_bundle.h"
 #include "content/test/test_content_browser_client.h"
 #include "content/test/test_content_client.h"
 #include "ipc/ipc_message_macros.h"
 #include "media/audio/audio_manager.h"
 #include "media/video/capture/fake_video_capture_device.h"
 #include "net/url_request/url_request_context.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"

 using ::testing::_;
 using ::testing::DeleteArg;
 using ::testing::DoAll;
 using ::testing::Return;
 using ::testing::SaveArg;

 const int kProcessId = 5;
 const int kRenderId = 6;
 const int kPageRequestId = 7;

 namespace content {

 class MockMediaStreamDispatcherHost : public MediaStreamDispatcherHost,
                                       public TestContentBrowserClient {
  public:
   MockMediaStreamDispatcherHost(
       const scoped_refptr<base::MessageLoopProxy>& message_loop,
       MediaStreamManager* manager)
       : MediaStreamDispatcherHost(kProcessId, manager),
         message_loop_(message_loop) {}

   // A list of mock methods.
   MOCK_METHOD4(OnStreamGenerated,
                void(int routing_id, int request_id, int audio_array_size,
                     int video_array_size));
   MOCK_METHOD2(OnStreamGenerationFailed, void(int routing_id, int request_id));
   MOCK_METHOD1(OnStopGeneratedStreamFromBrowser,
                void(int routing_id));

   // Accessor to private functions.
   void OnGenerateStream(int page_request_id,
                         const StreamOptions& components,
                         const base::Closure& quit_closure) {
     quit_closure_ = quit_closure;
     MediaStreamDispatcherHost::OnGenerateStream(
         kRenderId, page_request_id, components, GURL());
   }

   void OnStopGeneratedStream(const std::string& label) {
     MediaStreamDispatcherHost::OnStopGeneratedStream(kRenderId, label);
   }

   // Return the number of streams that have been opened or is being open.
   size_t NumberOfStreams() {
     return streams_.size();
   }

   std::string label_;
   StreamDeviceInfoArray audio_devices_;
   StreamDeviceInfoArray video_devices_;

  private:
   virtual ~MockMediaStreamDispatcherHost() {}

   // This method is used to dispatch IPC messages to the renderer. We intercept
   // these messages here and dispatch to our mock methods to verify the
   // conversation between this object and the renderer.
   virtual bool Send(IPC::Message* message) OVERRIDE {
     CHECK(message);

     // In this method we dispatch the messages to the according handlers as if
     // we are the renderer.
     bool handled = true;
     IPC_BEGIN_MESSAGE_MAP(MockMediaStreamDispatcherHost, *message)
       IPC_MESSAGE_HANDLER(MediaStreamMsg_StreamGenerated, OnStreamGenerated)
       IPC_MESSAGE_HANDLER(MediaStreamMsg_StreamGenerationFailed,
                           OnStreamGenerationFailed)
       IPC_MESSAGE_HANDLER(MediaStreamMsg_StopGeneratedStream,
                           OnStopGeneratedStreamFromBrowser)
       IPC_MESSAGE_UNHANDLED(handled = false)
     IPC_END_MESSAGE_MAP()
     EXPECT_TRUE(handled);

     delete message;
     return true;
   }

   // These handler methods do minimal things and delegate to the mock methods.
   void OnStreamGenerated(
       const IPC::Message& msg,
       int request_id,
       std::string label,
       StreamDeviceInfoArray audio_device_list,
       StreamDeviceInfoArray video_device_list) {
     OnStreamGenerated(msg.routing_id(), request_id, audio_device_list.size(),
         video_device_list.size());
     // Notify that the event have occured.
     message_loop_->PostTask(FROM_HERE, base::ResetAndReturn(&quit_closure_));
     label_ = label;
     audio_devices_ = audio_device_list;
     video_devices_ = video_device_list;
   }

   void OnStreamGenerationFailed(const IPC::Message& msg, int request_id) {
     OnStreamGenerationFailed(msg.routing_id(), request_id);
     if (!quit_closure_.is_null())
       message_loop_->PostTask(FROM_HERE, base::ResetAndReturn(&quit_closure_));
     label_= "";
   }

   void OnStopGeneratedStreamFromBrowser(const IPC::Message& msg,
                                         const std::string& label) {
     OnStopGeneratedStreamFromBrowser(msg.routing_id());
     // Notify that the event have occured.
     if (!quit_closure_.is_null())
       message_loop_->PostTask(FROM_HERE, base::ResetAndReturn(&quit_closure_));
     label_ = "";
   }

   scoped_refptr<base::MessageLoopProxy> message_loop_;
   base::Closure quit_closure_;
 };

 class MockMediaStreamUIProxy : public FakeMediaStreamUIProxy {
  public:
   MOCK_METHOD1(OnStarted, void(const base::Closure& stop));
 };

 class MediaStreamDispatcherHostTest : public testing::Test {
  public:
   MediaStreamDispatcherHostTest()
       : old_browser_client_(NULL),
         thread_bundle_(content::TestBrowserThreadBundle::IO_MAINLOOP) {
     // Create our own MediaStreamManager.
     audio_manager_.reset(media::AudioManager::Create());
     media_stream_manager_.reset(new MediaStreamManager(audio_manager_.get()));
     // Make sure we use fake devices to avoid long delays.
     media_stream_manager_->UseFakeDevice();

     host_ = new MockMediaStreamDispatcherHost(base::MessageLoopProxy::current(),
                                               media_stream_manager_.get());

     // Use the fake content client and browser.
     content_client_.reset(new TestContentClient());
     SetContentClient(content_client_.get());
     old_browser_client_ = SetBrowserClientForTesting(host_.get());
   }

   virtual ~MediaStreamDispatcherHostTest() {
     // Recover the old browser client and content client.
     SetBrowserClientForTesting(old_browser_client_);
     content_client_.reset();
     media_stream_manager_->WillDestroyCurrentMessageLoop();
   }

  protected:
   virtual void SetupFakeUI(bool expect_started) {
     scoped_ptr<MockMediaStreamUIProxy> stream_ui(new MockMediaStreamUIProxy());
     if (expect_started) {
       EXPECT_CALL(*stream_ui, OnStarted(_));
     }
     media_stream_manager_->UseFakeUI(
         stream_ui.PassAs<FakeMediaStreamUIProxy>());
   }

   void GenerateStreamAndWaitForResult(int page_request_id,
                                       const StreamOptions& options) {
     base::RunLoop run_loop;
     host_->OnGenerateStream(page_request_id, options, run_loop.QuitClosure());
     run_loop.Run();
   }

   scoped_refptr<MockMediaStreamDispatcherHost> host_;
   scoped_ptr<media::AudioManager> audio_manager_;
   scoped_ptr<MediaStreamManager> media_stream_manager_;
   ContentBrowserClient* old_browser_client_;
   scoped_ptr<ContentClient> content_client_;
   content::TestBrowserThreadBundle thread_bundle_;
 };

 TEST_F(MediaStreamDispatcherHostTest, GenerateStream) {
   StreamOptions options(MEDIA_NO_SERVICE, MEDIA_DEVICE_VIDEO_CAPTURE);

   SetupFakeUI(true);
   EXPECT_CALL(*host_.get(), OnStreamGenerated(kRenderId, kPageRequestId, 0, 1));
   GenerateStreamAndWaitForResult(kPageRequestId, options);

   std::string label =  host_->label_;

   EXPECT_EQ(host_->audio_devices_.size(), 0u);
   EXPECT_EQ(host_->video_devices_.size(), 1u);
   EXPECT_EQ(host_->NumberOfStreams(), 1u);

   host_->OnStopGeneratedStream(label);
   EXPECT_EQ(host_->NumberOfStreams(), 0u);
 }

 TEST_F(MediaStreamDispatcherHostTest, GenerateThreeStreams) {
   // This test opens three video capture devices. Two fake devices exists and it
   // is expected the last call to |Open()| will open the first device again, but
   // with a different label.
   StreamOptions options(MEDIA_NO_SERVICE, MEDIA_DEVICE_VIDEO_CAPTURE);

   // Generate first stream.
   SetupFakeUI(true);
   EXPECT_CALL(*host_.get(), OnStreamGenerated(kRenderId, kPageRequestId, 0, 1));
   GenerateStreamAndWaitForResult(kPageRequestId, options);

   // Check the latest generated stream.
   EXPECT_EQ(host_->audio_devices_.size(), 0u);
   EXPECT_EQ(host_->video_devices_.size(), 1u);
   std::string label1 = host_->label_;
   std::string device_id1 = host_->video_devices_.front().device.id;

   // Check that we now have one opened streams.
   EXPECT_EQ(host_->NumberOfStreams(), 1u);

   // Generate second stream.
   SetupFakeUI(true);
   EXPECT_CALL(*host_.get(),
               OnStreamGenerated(kRenderId, kPageRequestId + 1, 0, 1));
   GenerateStreamAndWaitForResult(kPageRequestId + 1, options);

   // Check the latest generated stream.
   EXPECT_EQ(host_->audio_devices_.size(), 0u);
   EXPECT_EQ(host_->video_devices_.size(), 1u);
   std::string label2 = host_->label_;
   std::string device_id2 = host_->video_devices_.front().device.id;
   EXPECT_EQ(device_id1, device_id2);
   EXPECT_NE(label1, label2);

   // Check that we now have two opened streams.
   EXPECT_EQ(2u, host_->NumberOfStreams());

   // Generate third stream.
   SetupFakeUI(true);
   EXPECT_CALL(*host_.get(),
               OnStreamGenerated(kRenderId, kPageRequestId + 2, 0, 1));
   GenerateStreamAndWaitForResult(kPageRequestId + 2, options);

   // Check the latest generated stream.
   EXPECT_EQ(host_->audio_devices_.size(), 0u);
   EXPECT_EQ(host_->video_devices_.size(), 1u);
   std::string label3 = host_->label_;
   std::string device_id3 = host_->video_devices_.front().device.id;
   EXPECT_EQ(device_id1, device_id3);
   EXPECT_NE(label1, label3);
   EXPECT_NE(label2, label3);

   // Check that we now have three opened streams.
   EXPECT_EQ(host_->NumberOfStreams(), 3u);

   host_->OnStopGeneratedStream(label1);
   host_->OnStopGeneratedStream(label2);
   host_->OnStopGeneratedStream(label3);
   EXPECT_EQ(host_->NumberOfStreams(), 0u);
 }

 TEST_F(MediaStreamDispatcherHostTest, CancelPendingStreamsOnChannelClosing) {
   StreamOptions options(MEDIA_NO_SERVICE, MEDIA_DEVICE_VIDEO_CAPTURE);

   base::RunLoop run_loop;

   // Create multiple GenerateStream requests.
   size_t streams = 5;
   for (size_t i = 1; i <= streams; ++i) {
     host_->OnGenerateStream(
         kPageRequestId + i, options, run_loop.QuitClosure());
     EXPECT_EQ(host_->NumberOfStreams(), i);
   }

   // Calling OnChannelClosing() to cancel all the pending requests.
   host_->OnChannelClosing();
   run_loop.RunUntilIdle();

   // Streams should have been cleaned up.
   EXPECT_EQ(host_->NumberOfStreams(), 0u);
 }

 TEST_F(MediaStreamDispatcherHostTest, StopGeneratedStreamsOnChannelClosing) {
   StreamOptions options(MEDIA_NO_SERVICE, MEDIA_DEVICE_VIDEO_CAPTURE);

   // Create first group of streams.
   size_t generated_streams = 3;
   for (size_t i = 0; i < generated_streams; ++i) {
     SetupFakeUI(true);
     EXPECT_CALL(*host_.get(),
                 OnStreamGenerated(kRenderId, kPageRequestId + i, 0, 1));
     GenerateStreamAndWaitForResult(kPageRequestId + i, options);
   }
   EXPECT_EQ(host_->NumberOfStreams(), generated_streams);

   // Calling OnChannelClosing() to cancel all the pending/generated streams.
   host_->OnChannelClosing();
   base::RunLoop().RunUntilIdle();

   // Streams should have been cleaned up.
   EXPECT_EQ(host_->NumberOfStreams(), 0u);
 }

 TEST_F(MediaStreamDispatcherHostTest, CloseFromUI) {
   StreamOptions options(MEDIA_NO_SERVICE, MEDIA_DEVICE_VIDEO_CAPTURE);

   base::Closure close_callback;
   scoped_ptr<MockMediaStreamUIProxy> stream_ui(new MockMediaStreamUIProxy());
   EXPECT_CALL(*stream_ui, OnStarted(_))
       .WillOnce(SaveArg<0>(&close_callback));
   media_stream_manager_->UseFakeUI(stream_ui.PassAs<FakeMediaStreamUIProxy>());

   EXPECT_CALL(*host_.get(), OnStreamGenerated(kRenderId, kPageRequestId, 0, 1));
   EXPECT_CALL(*host_.get(), OnStopGeneratedStreamFromBrowser(kRenderId));
   GenerateStreamAndWaitForResult(kPageRequestId, options);

   EXPECT_EQ(host_->audio_devices_.size(), 0u);
   EXPECT_EQ(host_->video_devices_.size(), 1u);
   EXPECT_EQ(host_->NumberOfStreams(), 1u);

   ASSERT_FALSE(close_callback.is_null());
   close_callback.Run();
   base::RunLoop().RunUntilIdle();

   EXPECT_EQ(host_->NumberOfStreams(), 0u);
 }

 };  // namespace content
	// 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/bind.h"
	#include "base/callback_helpers.h"
	#include "base/message_loop/message_loop.h"
	#include "base/run_loop.h"
	#include "content/browser/browser_thread_impl.h"
	#include "content/browser/renderer_host/media/media_stream_dispatcher_host.h"
	#include "content/browser/renderer_host/media/media_stream_manager.h"
	#include "content/browser/renderer_host/media/media_stream_ui_proxy.h"
	#include "content/browser/renderer_host/media/video_capture_manager.h"
	#include "content/common/media/media_stream_messages.h"
	#include "content/common/media/media_stream_options.h"
	#include "content/public/test/mock_resource_context.h"
	#include "content/public/test/test_browser_thread_bundle.h"
	#include "content/test/test_content_browser_client.h"
	#include "content/test/test_content_client.h"
	#include "ipc/ipc_message_macros.h"
	#include "media/audio/audio_manager.h"
	#include "media/video/capture/fake_video_capture_device.h"
	#include "net/url_request/url_request_context.h"
	#include "testing/gmock/include/gmock/gmock.h"
	#include "testing/gtest/include/gtest/gtest.h"

	using ::testing::_;
	using ::testing::DeleteArg;
	using ::testing::DoAll;
	using ::testing::Return;
	using ::testing::SaveArg;

	const int kProcessId = 5;
	const int kRenderId = 6;
	const int kPageRequestId = 7;

	namespace content {

	class MockMediaStreamDispatcherHost : public MediaStreamDispatcherHost,
	public TestContentBrowserClient {
	public:
	MockMediaStreamDispatcherHost(
	const scoped_refptr<base::MessageLoopProxy>& message_loop,
	MediaStreamManager* manager)
	: MediaStreamDispatcherHost(kProcessId, manager),
	message_loop_(message_loop) {}

	// A list of mock methods.
	MOCK_METHOD4(OnStreamGenerated,
	void(int routing_id, int request_id, int audio_array_size,
	int video_array_size));
	MOCK_METHOD2(OnStreamGenerationFailed, void(int routing_id, int request_id));
	MOCK_METHOD1(OnStopGeneratedStreamFromBrowser,
	void(int routing_id));

	// Accessor to private functions.
	void OnGenerateStream(int page_request_id,
	const StreamOptions& components,
	const base::Closure& quit_closure) {
	quit_closure_ = quit_closure;
	MediaStreamDispatcherHost::OnGenerateStream(
	kRenderId, page_request_id, components, GURL());
	}

	void OnStopGeneratedStream(const std::string& label) {
	MediaStreamDispatcherHost::OnStopGeneratedStream(kRenderId, label);
	}

	// Return the number of streams that have been opened or is being open.
	size_t NumberOfStreams() {
	return streams_.size();
	}

	std::string label_;
	StreamDeviceInfoArray audio_devices_;
	StreamDeviceInfoArray video_devices_;

	private:
	virtual ~MockMediaStreamDispatcherHost() {}

	// This method is used to dispatch IPC messages to the renderer. We intercept
	// these messages here and dispatch to our mock methods to verify the
	// conversation between this object and the renderer.
	virtual bool Send(IPC::Message* message) OVERRIDE {
	CHECK(message);

	// In this method we dispatch the messages to the according handlers as if
	// we are the renderer.
	bool handled = true;
	IPC_BEGIN_MESSAGE_MAP(MockMediaStreamDispatcherHost, *message)
	IPC_MESSAGE_HANDLER(MediaStreamMsg_StreamGenerated, OnStreamGenerated)
	IPC_MESSAGE_HANDLER(MediaStreamMsg_StreamGenerationFailed,
	OnStreamGenerationFailed)
	IPC_MESSAGE_HANDLER(MediaStreamMsg_StopGeneratedStream,
	OnStopGeneratedStreamFromBrowser)
	IPC_MESSAGE_UNHANDLED(handled = false)
	IPC_END_MESSAGE_MAP()
	EXPECT_TRUE(handled);

	delete message;
	return true;
	}

	// These handler methods do minimal things and delegate to the mock methods.
	void OnStreamGenerated(
	const IPC::Message& msg,
	int request_id,
	std::string label,
	StreamDeviceInfoArray audio_device_list,
	StreamDeviceInfoArray video_device_list) {
	OnStreamGenerated(msg.routing_id(), request_id, audio_device_list.size(),
	video_device_list.size());
	// Notify that the event have occured.
	message_loop_->PostTask(FROM_HERE, base::ResetAndReturn(&quit_closure_));
	label_ = label;
	audio_devices_ = audio_device_list;
	video_devices_ = video_device_list;
	}

	void OnStreamGenerationFailed(const IPC::Message& msg, int request_id) {
	OnStreamGenerationFailed(msg.routing_id(), request_id);
	if (!quit_closure_.is_null())
	message_loop_->PostTask(FROM_HERE, base::ResetAndReturn(&quit_closure_));
	label_= "";
	}

	void OnStopGeneratedStreamFromBrowser(const IPC::Message& msg,
	const std::string& label) {
	OnStopGeneratedStreamFromBrowser(msg.routing_id());
	// Notify that the event have occured.
	if (!quit_closure_.is_null())
	message_loop_->PostTask(FROM_HERE, base::ResetAndReturn(&quit_closure_));
	label_ = "";
	}

	scoped_refptr<base::MessageLoopProxy> message_loop_;
	base::Closure quit_closure_;
	};

	class MockMediaStreamUIProxy : public FakeMediaStreamUIProxy {
	public:
	MOCK_METHOD1(OnStarted, void(const base::Closure& stop));
	};

	class MediaStreamDispatcherHostTest : public testing::Test {
	public:
	MediaStreamDispatcherHostTest()
	: old_browser_client_(NULL),
	thread_bundle_(content::TestBrowserThreadBundle::IO_MAINLOOP) {
	// Create our own MediaStreamManager.
	audio_manager_.reset(media::AudioManager::Create());
	media_stream_manager_.reset(new MediaStreamManager(audio_manager_.get()));
	// Make sure we use fake devices to avoid long delays.
	media_stream_manager_->UseFakeDevice();

	host_ = new MockMediaStreamDispatcherHost(base::MessageLoopProxy::current(),
	media_stream_manager_.get());

	// Use the fake content client and browser.
	content_client_.reset(new TestContentClient());
	SetContentClient(content_client_.get());
	old_browser_client_ = SetBrowserClientForTesting(host_.get());
	}

	virtual ~MediaStreamDispatcherHostTest() {
	// Recover the old browser client and content client.
	SetBrowserClientForTesting(old_browser_client_);
	content_client_.reset();
	media_stream_manager_->WillDestroyCurrentMessageLoop();
	}

	protected:
	virtual void SetupFakeUI(bool expect_started) {
	scoped_ptr<MockMediaStreamUIProxy> stream_ui(new MockMediaStreamUIProxy());
	if (expect_started) {
	EXPECT_CALL(*stream_ui, OnStarted(_));
	}
	media_stream_manager_->UseFakeUI(
	stream_ui.PassAs<FakeMediaStreamUIProxy>());
	}

	void GenerateStreamAndWaitForResult(int page_request_id,
	const StreamOptions& options) {
	base::RunLoop run_loop;
	host_->OnGenerateStream(page_request_id, options, run_loop.QuitClosure());
	run_loop.Run();
	}

	scoped_refptr<MockMediaStreamDispatcherHost> host_;
	scoped_ptr<media::AudioManager> audio_manager_;
	scoped_ptr<MediaStreamManager> media_stream_manager_;
	ContentBrowserClient* old_browser_client_;
	scoped_ptr<ContentClient> content_client_;
	content::TestBrowserThreadBundle thread_bundle_;
	};

	TEST_F(MediaStreamDispatcherHostTest, GenerateStream) {
	StreamOptions options(MEDIA_NO_SERVICE, MEDIA_DEVICE_VIDEO_CAPTURE);

	SetupFakeUI(true);
	EXPECT_CALL(*host_.get(), OnStreamGenerated(kRenderId, kPageRequestId, 0, 1));
	GenerateStreamAndWaitForResult(kPageRequestId, options);

	std::string label = host_->label_;

	EXPECT_EQ(host_->audio_devices_.size(), 0u);
	EXPECT_EQ(host_->video_devices_.size(), 1u);
	EXPECT_EQ(host_->NumberOfStreams(), 1u);

	host_->OnStopGeneratedStream(label);
	EXPECT_EQ(host_->NumberOfStreams(), 0u);
	}

	TEST_F(MediaStreamDispatcherHostTest, GenerateThreeStreams) {
	// This test opens three video capture devices. Two fake devices exists and it
	// is expected the last call to \|Open()\| will open the first device again, but
	// with a different label.
	StreamOptions options(MEDIA_NO_SERVICE, MEDIA_DEVICE_VIDEO_CAPTURE);

	// Generate first stream.
	SetupFakeUI(true);
	EXPECT_CALL(*host_.get(), OnStreamGenerated(kRenderId, kPageRequestId, 0, 1));
	GenerateStreamAndWaitForResult(kPageRequestId, options);

	// Check the latest generated stream.
	EXPECT_EQ(host_->audio_devices_.size(), 0u);
	EXPECT_EQ(host_->video_devices_.size(), 1u);
	std::string label1 = host_->label_;
	std::string device_id1 = host_->video_devices_.front().device.id;

	// Check that we now have one opened streams.
	EXPECT_EQ(host_->NumberOfStreams(), 1u);

	// Generate second stream.
	SetupFakeUI(true);
	EXPECT_CALL(*host_.get(),
	OnStreamGenerated(kRenderId, kPageRequestId + 1, 0, 1));
	GenerateStreamAndWaitForResult(kPageRequestId + 1, options);

	// Check the latest generated stream.
	EXPECT_EQ(host_->audio_devices_.size(), 0u);
	EXPECT_EQ(host_->video_devices_.size(), 1u);
	std::string label2 = host_->label_;
	std::string device_id2 = host_->video_devices_.front().device.id;
	EXPECT_EQ(device_id1, device_id2);
	EXPECT_NE(label1, label2);

	// Check that we now have two opened streams.
	EXPECT_EQ(2u, host_->NumberOfStreams());

	// Generate third stream.
	SetupFakeUI(true);
	EXPECT_CALL(*host_.get(),
	OnStreamGenerated(kRenderId, kPageRequestId + 2, 0, 1));
	GenerateStreamAndWaitForResult(kPageRequestId + 2, options);

	// Check the latest generated stream.
	EXPECT_EQ(host_->audio_devices_.size(), 0u);
	EXPECT_EQ(host_->video_devices_.size(), 1u);
	std::string label3 = host_->label_;
	std::string device_id3 = host_->video_devices_.front().device.id;
	EXPECT_EQ(device_id1, device_id3);
	EXPECT_NE(label1, label3);
	EXPECT_NE(label2, label3);

	// Check that we now have three opened streams.
	EXPECT_EQ(host_->NumberOfStreams(), 3u);

	host_->OnStopGeneratedStream(label1);
	host_->OnStopGeneratedStream(label2);
	host_->OnStopGeneratedStream(label3);
	EXPECT_EQ(host_->NumberOfStreams(), 0u);
	}

	TEST_F(MediaStreamDispatcherHostTest, CancelPendingStreamsOnChannelClosing) {
	StreamOptions options(MEDIA_NO_SERVICE, MEDIA_DEVICE_VIDEO_CAPTURE);

	base::RunLoop run_loop;

	// Create multiple GenerateStream requests.
	size_t streams = 5;
	for (size_t i = 1; i <= streams; ++i) {
	host_->OnGenerateStream(
	kPageRequestId + i, options, run_loop.QuitClosure());
	EXPECT_EQ(host_->NumberOfStreams(), i);
	}

	// Calling OnChannelClosing() to cancel all the pending requests.
	host_->OnChannelClosing();
	run_loop.RunUntilIdle();

	// Streams should have been cleaned up.
	EXPECT_EQ(host_->NumberOfStreams(), 0u);
	}

	TEST_F(MediaStreamDispatcherHostTest, StopGeneratedStreamsOnChannelClosing) {
	StreamOptions options(MEDIA_NO_SERVICE, MEDIA_DEVICE_VIDEO_CAPTURE);

	// Create first group of streams.
	size_t generated_streams = 3;
	for (size_t i = 0; i < generated_streams; ++i) {
	SetupFakeUI(true);
	EXPECT_CALL(*host_.get(),
	OnStreamGenerated(kRenderId, kPageRequestId + i, 0, 1));
	GenerateStreamAndWaitForResult(kPageRequestId + i, options);
	}
	EXPECT_EQ(host_->NumberOfStreams(), generated_streams);

	// Calling OnChannelClosing() to cancel all the pending/generated streams.
	host_->OnChannelClosing();
	base::RunLoop().RunUntilIdle();

	// Streams should have been cleaned up.
	EXPECT_EQ(host_->NumberOfStreams(), 0u);
	}

	TEST_F(MediaStreamDispatcherHostTest, CloseFromUI) {
	StreamOptions options(MEDIA_NO_SERVICE, MEDIA_DEVICE_VIDEO_CAPTURE);

	base::Closure close_callback;
	scoped_ptr<MockMediaStreamUIProxy> stream_ui(new MockMediaStreamUIProxy());
	EXPECT_CALL(*stream_ui, OnStarted(_))
	.WillOnce(SaveArg<0>(&close_callback));
	media_stream_manager_->UseFakeUI(stream_ui.PassAs<FakeMediaStreamUIProxy>());

	EXPECT_CALL(*host_.get(), OnStreamGenerated(kRenderId, kPageRequestId, 0, 1));
	EXPECT_CALL(*host_.get(), OnStopGeneratedStreamFromBrowser(kRenderId));
	GenerateStreamAndWaitForResult(kPageRequestId, options);

	EXPECT_EQ(host_->audio_devices_.size(), 0u);
	EXPECT_EQ(host_->video_devices_.size(), 1u);
	EXPECT_EQ(host_->NumberOfStreams(), 1u);

	ASSERT_FALSE(close_callback.is_null());
	close_callback.Run();
	base::RunLoop().RunUntilIdle();

	EXPECT_EQ(host_->NumberOfStreams(), 0u);
	}

	}; // namespace content