Tab Audio Capture: Browser-side connect/disconnect functionality.

content/browser/renderer_host/media/audio_renderer_host_unittest.cc

Index: content/browser/renderer_host/media/audio_renderer_host_unittest.cc
diff --git a/content/browser/renderer_host/media/audio_renderer_host_unittest.cc b/content/browser/renderer_host/media/audio_renderer_host_unittest.cc
index e8bd79c9d28e3aa48135e9bf43b3bbae6c56e962..371de4bdd7106c48c1c3d6405a13e65ad5b5c29d 100644
--- a/content/browser/renderer_host/media/audio_renderer_host_unittest.cc
+++ b/content/browser/renderer_host/media/audio_renderer_host_unittest.cc
@@ -24,12 +24,15 @@ using ::testing::AtLeast;
 using ::testing::DoAll;
 using ::testing::InSequence;
 using ::testing::InvokeWithoutArgs;
+using ::testing::NotNull;
 using ::testing::Return;
 using ::testing::SaveArg;
 using ::testing::SetArgumentPointee;
 
 namespace content {
 
+static const int kRenderProcessId = 1;
+static const int kRenderViewId = 4;
 static const int kStreamId = 50;
 
 static bool IsRunningHeadless() {
@@ -44,7 +47,7 @@ class MockAudioRendererHost : public AudioRendererHost {
   explicit MockAudioRendererHost(
       media::AudioManager* audio_manager,
       MediaObserver* media_observer)
-      : AudioRendererHost(audio_manager, media_observer),
+      : AudioRendererHost(kRenderProcessId, audio_manager, media_observer),
         shared_memory_length_(0) {
   }
 
@@ -60,6 +63,8 @@ class MockAudioRendererHost : public AudioRendererHost {
   virtual ~MockAudioRendererHost() {
     // Make sure all audio streams have been deleted.
     EXPECT_TRUE(audio_entries_.empty());
+    // Make sure no mirroring sessions are active.
+    EXPECT_TRUE(mirror_sessions_.empty());
   }
 
   // This method is used to dispatch IPC messages to the renderer. We intercept
@@ -136,6 +141,23 @@ class MockAudioRendererHost : public AudioRendererHost {
   DISALLOW_COPY_AND_ASSIGN(MockAudioRendererHost);
 };
 
+class MockMirroringDestination
+    : public AudioRendererHost::MirroringDestination {
+ public:
+  MockMirroringDestination() {}
+
+  MOCK_METHOD2(AddInput,
+               void(media::AudioOutputStream::AudioSourceCallback* callback,
+                    const media::AudioParameters& params));
+  MOCK_METHOD1(RemoveInput,
+               void(media::AudioOutputStream::AudioSourceCallback* callback));
+
+ private:
+  virtual ~MockMirroringDestination() {}
+
+  DISALLOW_COPY_AND_ASSIGN(MockMirroringDestination);
+};
+
 ACTION_P(QuitMessageLoop, message_loop) {
   message_loop->PostTask(FROM_HERE, MessageLoop::QuitClosure());
 }
@@ -159,20 +181,24 @@ class AudioRendererHostTest : public testing::Test {
     audio_manager_.reset(media::AudioManager::Create());
     observer_.reset(new MockMediaObserver());
     host_ = new MockAudioRendererHost(audio_manager_.get(), observer_.get());
-
-    // Expect the audio stream will be deleted.
-    EXPECT_CALL(*observer_, OnDeleteAudioStream(_, kStreamId));
+    destination_ = new MockMirroringDestination();
+    another_destination_ = new MockMirroringDestination();
 
     // Simulate IPC channel connected.
     host_->OnChannelConnected(base::GetCurrentProcId());
+
+    if (!IsRunningHeadless())
+      EnableRealDevice();
   }
 
   virtual void TearDown() {
     // Simulate closing the IPC channel.
     host_->OnChannelClosing();
 
-    // Release the reference to the mock object.  The object will be destructed
-    // on message_loop_.
+    // Release the reference to the mock objects.  The MockAudioRendererHost
+    // will be destroyed on message_loop_.
+    another_destination_ = NULL;
+    destination_ = NULL;
     host_ = NULL;
 
     // We need to continue running message_loop_ to complete all destructions.
@@ -208,6 +234,13 @@ class AudioRendererHostTest : public testing::Test {
     // we receive the created message.
     host_->OnCreateStream(kStreamId, params, 0);
     message_loop_->Run();
+
+    // Simulate the renderer process associating a stream with a render view.
+    host_->OnAssociateStreamWithProducer(kStreamId, kRenderViewId);
+    message_loop_->RunUntilIdle();
+
+    // Expect the audio stream will be deleted at some later point.
+    EXPECT_CALL(*observer_, OnDeleteAudioStream(_, kStreamId));
   }
 
   void Close() {
@@ -248,6 +281,20 @@ class AudioRendererHostTest : public testing::Test {
     message_loop_->RunUntilIdle();
   }
 
+  void StartMirroringTo(MockMirroringDestination* dest,
+                        int expected_inputs_seen) {
+    EXPECT_CALL(*dest, AddInput(NotNull(), _)).Times(expected_inputs_seen);
+    EXPECT_CALL(*dest, RemoveInput(NotNull())).Times(expected_inputs_seen);
+
+    AudioRendererHost::StartMirroring(kRenderProcessId, kRenderViewId, dest);
+    message_loop_->RunUntilIdle();
+  }
+
+  void StopMirroringTo(MockMirroringDestination* dest) {
+    AudioRendererHost::StopMirroring(kRenderProcessId, kRenderViewId, dest);
+    message_loop_->RunUntilIdle();
+  }
+
   void SimulateError() {
     EXPECT_CALL(*observer_,
                 OnSetAudioStreamStatus(_, kStreamId, "error"));
@@ -297,10 +344,21 @@ class AudioRendererHostTest : public testing::Test {
 
   void EnableRealDevice() { mock_stream_ = false; }
 
+ protected:
+  // Accessors for testing mirroring to one or two destinations.
+  MockMirroringDestination* destination() const {
+    return destination_;
+  }
+  MockMirroringDestination* another_destination() const {
+    return another_destination_;
+  }
+
  private:
   bool mock_stream_;
   scoped_ptr<MockMediaObserver> observer_;
   scoped_refptr<MockAudioRendererHost> host_;
+  scoped_refptr<MockMirroringDestination> destination_;
+  scoped_refptr<MockMirroringDestination> another_destination_;
   scoped_ptr<MessageLoop> message_loop_;
   scoped_ptr<BrowserThreadImpl> io_thread_;
   scoped_ptr<BrowserThreadImpl> ui_thread_;
@@ -310,34 +368,22 @@ class AudioRendererHostTest : public testing::Test {
 };
 
 TEST_F(AudioRendererHostTest, CreateAndClose) {
-  if (!IsRunningHeadless())
-    EnableRealDevice();
-
   Create();
   Close();
 }
 
 // Simulate the case where a stream is not properly closed.
 TEST_F(AudioRendererHostTest, CreateAndShutdown) {
-  if (!IsRunningHeadless())
-    EnableRealDevice();
-
   Create();
 }
 
 TEST_F(AudioRendererHostTest, CreatePlayAndClose) {
-  if (!IsRunningHeadless())
-    EnableRealDevice();
-
   Create();
   Play();
   Close();
 }
 
 TEST_F(AudioRendererHostTest, CreatePlayPauseAndClose) {
-  if (!IsRunningHeadless())
-    EnableRealDevice();
-
   Create();
   Play();
   Pause();
@@ -345,9 +391,6 @@ TEST_F(AudioRendererHostTest, CreatePlayPauseAndClose) {
 }
 
 TEST_F(AudioRendererHostTest, SetVolume) {
-  if (!IsRunningHeadless())
-    EnableRealDevice();
-
   Create();
   SetVolume(0.5);
   Play();
@@ -357,27 +400,97 @@ TEST_F(AudioRendererHostTest, SetVolume) {
 
 // Simulate the case where a stream is not properly closed.
 TEST_F(AudioRendererHostTest, CreatePlayAndShutdown) {
-  if (!IsRunningHeadless())
-    EnableRealDevice();
-
   Create();
   Play();
 }
 
 // Simulate the case where a stream is not properly closed.
 TEST_F(AudioRendererHostTest, CreatePlayPauseAndShutdown) {
-  if (!IsRunningHeadless())
-    EnableRealDevice();
+  Create();
+  Play();
+  Pause();
+}
+
+TEST_F(AudioRendererHostTest, MirroringOfNothing) {
+  StartMirroringTo(destination(), 0);
+  StopMirroringTo(destination());
+}
 
+TEST_F(AudioRendererHostTest, StreamLifetimeAroundMirroringSession) {
   Create();
   Play();
+  StartMirroringTo(destination(), 1);
+  StopMirroringTo(destination());
+  Close();
+}
+
+TEST_F(AudioRendererHostTest, PauseStreamDuringMirroringSession) {
+  Create();
+  Play();
+  StartMirroringTo(destination(), 1);
   Pause();
+  StopMirroringTo(destination());
+  Close();
 }
 
-TEST_F(AudioRendererHostTest, SimulateError) {
-  if (!IsRunningHeadless())
-    EnableRealDevice();
+TEST_F(AudioRendererHostTest, StreamLifetimeWithinMirroringSession) {
+  StartMirroringTo(destination(), 1);
+  Create();
+  Play();
+  Close();
+  StopMirroringTo(destination());
+}
+
+TEST_F(AudioRendererHostTest, StreamLifetimeAroundTwoMirroringSessions) {
+  Create();
+  Play();
+  StartMirroringTo(destination(), 1);
+  StopMirroringTo(destination());
+  StartMirroringTo(another_destination(), 1);
+  StopMirroringTo(another_destination());
+  Close();
+}
+
+TEST_F(AudioRendererHostTest, StreamLifetimeWithinTwoMirroringSessions) {
+  StartMirroringTo(destination(), 1);
+  Create();
+  Play();
+  StopMirroringTo(destination());
+  StartMirroringTo(another_destination(), 1);
+  Close();
+  StopMirroringTo(another_destination());
+}
+
+TEST_F(AudioRendererHostTest, StreamSwitchesMirroringSessions) {
+  StartMirroringTo(destination(), 1);
+  Create();
+  Play();
+  StartMirroringTo(another_destination(), 1);
+  Close();
+  StopMirroringTo(another_destination());
+  StopMirroringTo(destination());  // This should be a no-op.
+}
+
+TEST_F(AudioRendererHostTest, SwitchMirroringDestinationNoStreams) {
+  StartMirroringTo(destination(), 0);
+  StartMirroringTo(another_destination(), 0);
+  StopMirroringTo(another_destination());
+}
+
+// Simulate the case where mirroring was not stopped before shutdown.
+TEST_F(AudioRendererHostTest, StartMirroringNothingAndShutdown) {
+  StartMirroringTo(destination(), 0);
+}
 
+// Simulate the case where mirroring was not stopped before shutdown, and a
+// stream was being mirrored.
+TEST_F(AudioRendererHostTest, StartMirroringSomethingAndShutdown) {
+  StartMirroringTo(destination(), 1);
+  Create();
+  Play();
+}
+
+TEST_F(AudioRendererHostTest, SimulateError) {
   Create();
   Play();
   SimulateError();
@@ -387,9 +500,6 @@ TEST_F(AudioRendererHostTest, SimulateError) {
 // the audio device is closed but the render process try to close the
 // audio stream again.
 TEST_F(AudioRendererHostTest, SimulateErrorAndClose) {
-  if (!IsRunningHeadless())
-    EnableRealDevice();
-
   Create();
   Play();
   SimulateError();