Adding a unit test to verify the IPC channel between the network and desktop processes.

remoting/host/ipc_desktop_environment_unittest.cc

Index: remoting/host/ipc_desktop_environment_unittest.cc
diff --git a/remoting/host/ipc_desktop_environment_unittest.cc b/remoting/host/ipc_desktop_environment_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..c918ea382dcb2b6c7134aafaa72e57304e07f178
--- /dev/null
+++ b/remoting/host/ipc_desktop_environment_unittest.cc
@@ -0,0 +1,355 @@
+// Copyright (c) 2013 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 "base/bind.h"
+#include "base/bind_helpers.h"
+#include "base/callback.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
+#include "base/message_loop.h"
+#include "base/process.h"
+#include "base/process_util.h"
+#include "base/run_loop.h"
+#include "ipc/ipc_channel.h"
+#include "ipc/ipc_channel_proxy.h"
+#include "ipc/ipc_listener.h"
+#include "ipc/ipc_message.h"
+#include "ipc/ipc_platform_file.h"
+#include "media/video/capture/screen/screen_capturer_fake.h"
+#include "media/video/capture/screen/screen_capturer_mock_objects.h"
+#include "remoting/base/auto_thread.h"
+#include "remoting/base/auto_thread_task_runner.h"
+#include "remoting/host/chromoting_messages.h"
+#include "remoting/host/desktop_process.h"
+#include "remoting/host/desktop_session_connector.h"
+#include "remoting/host/desktop_session_proxy.h"
+#include "remoting/host/host_mock_objects.h"
+#include "remoting/host/ipc_desktop_environment.h"
+#include "remoting/protocol/protocol_mock_objects.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+using testing::_;
+using testing::AnyNumber;
+using testing::Return;
+
+namespace remoting {
+
+namespace {
+
+class MockDaemonListener : public IPC::Listener {
+ public:
+  MockDaemonListener() {}
+  virtual ~MockDaemonListener() {}
+
+  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
+
+  MOCK_METHOD1(OnDesktopAttached, void(IPC::PlatformFileForTransit));
+  MOCK_METHOD1(OnChannelConnected, void(int32));
+  MOCK_METHOD0(OnChannelError, void());
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(MockDaemonListener);
+};
+
+bool MockDaemonListener::OnMessageReceived(const IPC::Message& message) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP(MockDaemonListener, message)
+    IPC_MESSAGE_HANDLER(ChromotingDesktopDaemonMsg_DesktopAttached,
+                        OnDesktopAttached)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+
+  EXPECT_TRUE(handled);
+  return handled;
+}
+
+}  // namespace
+
+class IpcDesktopEnvironmentTest
+    : public testing::Test,
+      public DesktopSessionConnector {
+ public:
+  IpcDesktopEnvironmentTest();
+  virtual ~IpcDesktopEnvironmentTest();
+
+  virtual void SetUp() OVERRIDE;
+
+  // DesktopSessionConnector implementation.
+  virtual void ConnectTerminal(
+      scoped_refptr<DesktopSessionProxy> desktop_session_proxy) OVERRIDE;
+  virtual void DisconnectTerminal(
+      scoped_refptr<DesktopSessionProxy> desktop_session_proxy) OVERRIDE;
+  virtual void OnDesktopSessionAgentAttached(
+      int terminal_id,
+      base::ProcessHandle desktop_process,
+      IPC::PlatformFileForTransit desktop_pipe) OVERRIDE;
+  virtual void OnTerminalDisconnected(int terminal_id) OVERRIDE;
+
+  // Creates a DesktopEnvironment with a fake media::ScreenCapturer, to mock
+  // DesktopEnvironmentFactory::Create().
+  DesktopEnvironment* CreateDesktopEnvironment();
+
+  // Creates a dummy EventExecutor, to mock
+  // DesktopEnvironment::CreateEventExecutor().
+  EventExecutor* CreateEventExecutor();
+
+  // Creates a fake media::ScreenCapturer, to mock
+  // DesktopEnvironment::CreateVideoCapturer().
+  media::ScreenCapturer* CreateVideoCapturer();
+
+  void DeleteDesktopEnvironment();
+
+ protected:
+  void OnDisconnectCallback();
+
+  // Invoked when ChromotingDesktopDaemonMsg_DesktopAttached message is
+  // received.
+  void OnDesktopAttached(IPC::PlatformFileForTransit desktop_pipe);
+
+  // Invoked when the daemon-to-desktop channel is closed.
+  void OnDesktopSessionClosed();
+
+  // The main message loop.
+  MessageLoop message_loop_;
+
+  // Runs until |desktop_session_proxy_| is connected to the desktop.
+  base::RunLoop setup_run_loop_;
+
+  // Runs until there are references to |task_runner_|.
+  base::RunLoop main_run_loop_;
+
+  scoped_refptr<AutoThreadTaskRunner> task_runner_;
+
+  // Factory for weak pointers to DesktopSessionConnector interface.
+  base::WeakPtrFactory<DesktopSessionConnector> connector_factory_;
+
+  // The daemons's end of the daemon-to-desktop channel.
+  scoped_ptr<IPC::ChannelProxy> daemon_channel_;
+
+  // Name of the daemon-to-desktop channel.
+  std::string daemon_channel_name_;
+
+  // Delegate that is passed to |daemon_channel_|.
+  MockDaemonListener daemon_listener_;
+
+  scoped_ptr<IpcDesktopEnvironment> desktop_environment_;
+
+  // Event executor created by |desktop_environment_|.
+  scoped_ptr<EventExecutor> event_executor_;
+
+  // Screen capturer created by |desktop_environment_|.
+  scoped_ptr<media::ScreenCapturer> video_capturer_;
+
+  // Represents the desktop process running in a user session.
+  scoped_ptr<DesktopProcess> desktop_process_;
+
+  // Points to the DesktopSessionProxy instance created by
+  // IpdDesktopEnvironment.
+  scoped_refptr<DesktopSessionProxy> desktop_session_proxy_;
+
+  media::MockScreenCapturerDelegate screen_capturer_delegate_;
+};
+
+IpcDesktopEnvironmentTest::IpcDesktopEnvironmentTest()
+    : message_loop_(MessageLoop::TYPE_UI),
+      connector_factory_(ALLOW_THIS_IN_INITIALIZER_LIST(this)) {
+}
+
+IpcDesktopEnvironmentTest::~IpcDesktopEnvironmentTest() {
+}
+
+void IpcDesktopEnvironmentTest::SetUp() {
+  // Arrange to run |message_loop_| until no components depend on it.
+  task_runner_ = new AutoThreadTaskRunner(
+      message_loop_.message_loop_proxy(), main_run_loop_.QuitClosure());
+
+  scoped_refptr<AutoThreadTaskRunner> io_task_runner =
+      AutoThread::CreateWithType("IPC thread", task_runner_,
+                                 MessageLoop::TYPE_IO);
+
+  // Set expectation that the DaemonProcess will send DesktopAttached message
+  // once it is ready.
+  EXPECT_CALL(daemon_listener_, OnChannelConnected(_));
+  EXPECT_CALL(daemon_listener_, OnDesktopAttached(_))
+      .WillOnce(Invoke(this, &IpcDesktopEnvironmentTest::OnDesktopAttached));
+  EXPECT_CALL(daemon_listener_, OnChannelError())
+      .Times(AnyNumber())
+      .WillOnce(Invoke(this,
+                       &IpcDesktopEnvironmentTest::OnDesktopSessionClosed));
+
+  // Create the daemon end of the daemon-to-desktop channel.
+  daemon_channel_name_ = IPC::Channel::GenerateUniqueRandomChannelID();
+  daemon_channel_.reset(new IPC::ChannelProxy(
+      IPC::ChannelHandle(daemon_channel_name_),
+      IPC::Channel::MODE_SERVER,
+      &daemon_listener_,
+      io_task_runner));
+
+  // Create an IpcDesktopEnvironment instance.
+  desktop_environment_.reset(new IpcDesktopEnvironment(
+      task_runner_, io_task_runner, "user@domain/rest-of-jid",
+      base::Bind(&IpcDesktopEnvironmentTest::OnDisconnectCallback,
+                 base::Unretained(this)),
+      connector_factory_.GetWeakPtr()));
+
+  // Create the event executor.
+  event_executor_ =
+      desktop_environment_->CreateEventExecutor(task_runner_, task_runner_);
+
+  // Create the screen capturer.
+  video_capturer_ =
+      desktop_environment_->CreateVideoCapturer(task_runner_, task_runner_);
+}
+
+void IpcDesktopEnvironmentTest::ConnectTerminal(
+    scoped_refptr<DesktopSessionProxy> desktop_session_proxy) {
+  EXPECT_TRUE(!desktop_process_);
+  EXPECT_TRUE(!desktop_session_proxy_.get());
+  EXPECT_TRUE(task_runner_.get());
+
+  desktop_session_proxy_ = desktop_session_proxy;
+
+  // Create and start the desktop process.
+  desktop_process_.reset(new DesktopProcess(task_runner_,
+                                            daemon_channel_name_));
+
+  scoped_ptr<MockDesktopEnvironmentFactory> desktop_environment_factory(
+      new MockDesktopEnvironmentFactory());
+  EXPECT_CALL(*desktop_environment_factory, CreatePtr())
+      .Times(AnyNumber())
+      .WillRepeatedly(Invoke(
+          this, &IpcDesktopEnvironmentTest::CreateDesktopEnvironment));
+  EXPECT_CALL(*desktop_environment_factory, SupportsAudioCapture())
+      .Times(AnyNumber())
+      .WillRepeatedly(Return(false));
+
+  // TODO(alexeypa): Fix DesktopProcess to use the desktop environment
+  // to create the disconnect window instead of directly calling
+  // DisconnectWindow::Create(). This will take care of "Uninteresting mock
+  // function call" warnings printed when DisconnectWindow::Show() and
+  // DisconnectWindow::Hide() are called.
+  EXPECT_TRUE(desktop_process_->Start(
+      desktop_environment_factory.PassAs<DesktopEnvironmentFactory>()));
+}
+
+void IpcDesktopEnvironmentTest::DisconnectTerminal(
+    scoped_refptr<DesktopSessionProxy> desktop_session_proxy) {
+  EXPECT_TRUE(desktop_session_proxy_.get());
+  EXPECT_EQ(desktop_session_proxy_.get(), desktop_session_proxy.get());
+
+  desktop_session_proxy_ = NULL;
+}
+
+void IpcDesktopEnvironmentTest::OnDesktopSessionAgentAttached(
+    int terminal_id,
+    base::ProcessHandle desktop_process,
+    IPC::PlatformFileForTransit desktop_pipe) {
+  NOTIMPLEMENTED();
+}
+
+void IpcDesktopEnvironmentTest::OnTerminalDisconnected(int terminal_id) {
+  NOTIMPLEMENTED();
+}
+
+DesktopEnvironment* IpcDesktopEnvironmentTest::CreateDesktopEnvironment() {
+  MockDesktopEnvironment* desktop_environment = new MockDesktopEnvironment();
+  EXPECT_CALL(*desktop_environment, CreateAudioCapturerPtr(_))
+      .Times(0);
+  EXPECT_CALL(*desktop_environment, CreateEventExecutorPtr(_, _))
+      .Times(AnyNumber())
+      .WillRepeatedly(
+          InvokeWithoutArgs(this,
+                            &IpcDesktopEnvironmentTest::CreateEventExecutor));
+  EXPECT_CALL(*desktop_environment, CreateVideoCapturerPtr(_, _))
+      .Times(AnyNumber())
+      .WillRepeatedly(
+          InvokeWithoutArgs(this,
+                            &IpcDesktopEnvironmentTest::CreateVideoCapturer));
+
+  return desktop_environment;
+}
+
+EventExecutor* IpcDesktopEnvironmentTest::CreateEventExecutor() {
+  MockEventExecutor* event_executor = new MockEventExecutor();
+  EXPECT_CALL(*event_executor, StartPtr(_));
+  return event_executor;
+}
+
+media::ScreenCapturer* IpcDesktopEnvironmentTest::CreateVideoCapturer() {
+  return new media::ScreenCapturerFake();
+}
+
+void IpcDesktopEnvironmentTest::DeleteDesktopEnvironment() {
+  desktop_environment_.reset();
+  event_executor_.reset();
+  video_capturer_.reset();
+}
+
+void IpcDesktopEnvironmentTest::OnDisconnectCallback() {
+  NOTIMPLEMENTED();
+}
+
+void IpcDesktopEnvironmentTest::OnDesktopAttached(
+    IPC::PlatformFileForTransit desktop_pipe) {
+  // Instruct DesktopSessionProxy to connect to the network-to-desktop pipe.
+  EXPECT_TRUE(desktop_session_proxy_->AttachToDesktop(
+      base::GetCurrentProcessHandle(), desktop_pipe));
+
+  // Let the test know that |desktop_session_proxy_| is attahced to the desktop.
+  setup_run_loop_.Quit();
+}
+
+void IpcDesktopEnvironmentTest::OnDesktopSessionClosed() {
+  daemon_channel_.reset();
+  desktop_process_.reset();
+}
+
+TEST_F(IpcDesktopEnvironmentTest, Basic) {
+  scoped_ptr<protocol::MockClipboardStub> clipboard_stub(
+      new protocol::MockClipboardStub());
+  EXPECT_CALL(*clipboard_stub, InjectClipboardEvent(_))
+      .Times(0);
+
+  // Start the event executor and screen capturer.
+  event_executor_->Start(clipboard_stub.PassAs<protocol::ClipboardStub>());
+  video_capturer_->Start(&screen_capturer_delegate_);
+
+  // Run the message loop until the desktop is attached.
+  setup_run_loop_.Run();
+
+  // Stop the test.
+  DeleteDesktopEnvironment();
+
+  task_runner_ = NULL;
+  main_run_loop_.Run();
+}
+
+TEST_F(IpcDesktopEnvironmentTest, CaptureFrame) {
+  scoped_ptr<protocol::MockClipboardStub> clipboard_stub(
+      new protocol::MockClipboardStub());
+  EXPECT_CALL(*clipboard_stub, InjectClipboardEvent(_))
+      .Times(0);
+
+  // Start the event executor and screen capturer.
+  event_executor_->Start(clipboard_stub.PassAs<protocol::ClipboardStub>());
+  video_capturer_->Start(&screen_capturer_delegate_);
+
+  // Run the message loop until the desktop is attached.
+  setup_run_loop_.Run();
+
+  // Stop the test when the first frame is captured.
+  EXPECT_CALL(screen_capturer_delegate_, OnCaptureCompleted(_))
+      .WillOnce(InvokeWithoutArgs(
+          this, &IpcDesktopEnvironmentTest::DeleteDesktopEnvironment));
+
+  // Capture a single frame.
+  video_capturer_->CaptureFrame();
+
+  task_runner_ = NULL;
+  main_run_loop_.Run();
+}
+
+}  // namespace remoting