Factor out AudioOutputDelegate from AudioRendererHost.

content/browser/renderer_host/media/audio_output_delegate_unittest.cc

Index: content/browser/renderer_host/media/audio_output_delegate_unittest.cc
diff --git a/content/browser/renderer_host/media/audio_output_delegate_unittest.cc b/content/browser/renderer_host/media/audio_output_delegate_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..cadfe055439b9a6dcec141250203f277bf2df0d7
--- /dev/null
+++ b/content/browser/renderer_host/media/audio_output_delegate_unittest.cc
@@ -0,0 +1,604 @@
+// Copyright 2016 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 "content/browser/renderer_host/media/audio_output_delegate.h"
+
+#include <stdint.h>
+
+#include <memory>
+#include <utility>
+
+#include "base/bind.h"
+#include "base/command_line.h"
+#include "base/message_loop/message_loop.h"
+#include "base/run_loop.h"
+#include "content/browser/media/capture/audio_mirroring_manager.h"
+#include "content/browser/renderer_host/media/media_stream_manager.h"
+#include "content/public/browser/browser_thread.h"
+#include "content/public/browser/media_observer.h"
+#include "content/public/test/mock_render_process_host.h"
+#include "content/public/test/test_browser_context.h"
+#include "content/public/test/test_browser_thread_bundle.h"
+#include "content/test/test_web_contents.h"
+#include "media/audio/fake_audio_log_factory.h"
+#include "media/audio/fake_audio_manager.h"
+#include "media/base/media_switches.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+using ::testing::_;
+using ::testing::InSequence;
+using ::testing::NotNull;
+using ::testing::StrictMock;
+
+// Not yet tested:

[DaleCurtis, 2016/12/01 19:33:07]

Mark with TODO(maxmorin) if you're going to leave this comment.

+// - Interactions with AudioStreamMonitor (goes through WebContentsImpl,
+//   so it's a bit tricky).
+// - Logging (small risk of bugs, not worth the effort).
+// - That the returned socket/memory is correctly set up.
+
+namespace content {
+
+namespace {
+
+const int kRenderProcessId = 1;
+const int kRenderFrameId = 5;
+const int kStreamId = 50;
+const char kDefaultDeviceId[] = "";
+
+class MockAudioMirroringManager : public AudioMirroringManager {
+ public:
+  MOCK_METHOD3(AddDiverter,
+               void(int render_process_id,
+                    int render_frame_id,
+                    Diverter* diverter));
+  MOCK_METHOD1(RemoveDiverter, void(Diverter* diverter));
+};
+
+class MockObserver : public content::MediaObserver {
+ public:
+  void OnAudioCaptureDevicesChanged() override {}
+  void OnVideoCaptureDevicesChanged() override {}
+  void OnMediaRequestStateChanged(int render_process_id,
+                                  int render_frame_id,
+                                  int page_request_id,
+                                  const GURL& security_origin,
+                                  MediaStreamType stream_type,
+                                  MediaRequestState state) override {}
+  void OnSetCapturingLinkSecured(int render_process_id,
+                                 int render_frame_id,
+                                 int page_request_id,
+                                 MediaStreamType stream_type,
+                                 bool is_secure) override {}
+
+  MOCK_METHOD2(OnCreatingAudioStream,
+               void(int render_process_id, int render_frame_id));
+};
+
+class MockEventHandler : public AudioOutputDelegate::EventHandler {
+ public:
+  MOCK_METHOD1(OnStreamStateChanged, void(bool playing));
+  MOCK_METHOD3(OnStreamCreated,
+               void(int stream_id,
+                    base::SharedMemory* shared_memory,
+                    base::CancelableSyncSocket* socket));
+  MOCK_METHOD1(OnStreamError, void(int stream_id));
+};
+
+class DummyAudioOutputStream : public media::AudioOutputStream {
+ public:
+  // AudioOutputSteam implementation:
+  bool Open() override { return true; }
+  void Start(AudioSourceCallback* cb) override {}
+  void Stop() override {}
+  void SetVolume(double volume) override {}
+  void GetVolume(double* volume) override { *volume = 1; }
+  void Close() override {}
+};
+
+}  // namespace
+
+class AudioOutputDelegateTest : public testing::Test {
+ public:
+  AudioOutputDelegateTest() {
+    base::CommandLine::ForCurrentProcess()->AppendSwitch(
+        switches::kUseFakeDeviceForMediaStream);
+
+    // This test uses real UI, IO and audio threads.
+    // AudioOutputDelegate mainly interacts with the IO and audio threads,
+    // but interacts with UI for bad messages, so using these threads should
+    // approximate the real conditions of AudioOutputDelegate well.
+    thread_bundle_ = base::MakeUnique<TestBrowserThreadBundle>(
+        TestBrowserThreadBundle::Options::REAL_IO_THREAD);
+    audio_thread_ = base::MakeUnique<base::Thread>("AudioThread");
+
+// Audio manager creation stolen from content/browser/browser_main_loop.cc.
+#if defined(OS_WIN)
+    audio_thread_->init_com_with_mta(true);
+#endif  // defined(OS_WIN)
+    CHECK(audio_thread_->Start());
+
+#if defined(OS_MACOSX)
+    scoped_refptr<base::SingleThreadTaskRunner> audio_task_runner =
+        base::ThreadTaskRunnerHandle::Get();
+#else
+    scoped_refptr<base::SingleThreadTaskRunner> audio_task_runner =
+        audio_thread_->task_runner();
+#endif  // defined(OS_MACOSX)
+
+    audio_manager_.reset(new media::FakeAudioManager(
+        audio_task_runner, audio_thread_->task_runner(), &log_factory_));
+    media_stream_manager_ =
+        base::MakeUnique<MediaStreamManager>(audio_manager_.get());
+  }
+
+  // Test bodies are here, so that we can run them on the IO thread.
+  void CreateTest(base::Closure done) {
+    EXPECT_CALL(media_observer_,
+                OnCreatingAudioStream(kRenderProcessId, kRenderFrameId));
+    EXPECT_CALL(event_handler_,
+                OnStreamCreated(kStreamId, NotNull(), NotNull()));
+    EXPECT_CALL(mirroring_manager_,
+                AddDiverter(kRenderProcessId, kRenderFrameId, NotNull()));
+
+    AudioOutputDelegate::ScopedPtr delegate = AudioOutputDelegate::Create(
+        &event_handler_, audio_manager_.get(),
+        log_factory_.CreateAudioLog(
+            media::AudioLogFactory::AUDIO_OUTPUT_CONTROLLER),
+        &mirroring_manager_, &media_observer_, kStreamId, kRenderFrameId,
+        kRenderProcessId, audio_manager_->GetDefaultOutputStreamParameters(),
+        kDefaultDeviceId);
+
+    SyncWithAllThreads();
+
+    EXPECT_CALL(mirroring_manager_, RemoveDiverter(NotNull()));
+    delegate.reset();
+    SyncWithAllThreads();
+    BrowserThread::PostTask(BrowserThread::UI, FROM_HERE, done);
+  }
+
+  void PlayTest(base::Closure done) {
+    EXPECT_CALL(media_observer_,
+                OnCreatingAudioStream(kRenderProcessId, kRenderFrameId));
+    EXPECT_CALL(event_handler_,
+                OnStreamCreated(kStreamId, NotNull(), NotNull()));
+    EXPECT_CALL(mirroring_manager_,
+                AddDiverter(kRenderProcessId, kRenderFrameId, NotNull()));
+    {
+      InSequence s;
+      EXPECT_CALL(event_handler_, OnStreamStateChanged(true));
+      EXPECT_CALL(event_handler_, OnStreamStateChanged(false));
+    }
+
+    AudioOutputDelegate::ScopedPtr delegate = AudioOutputDelegate::Create(
+        &event_handler_, audio_manager_.get(),
+        log_factory_.CreateAudioLog(
+            media::AudioLogFactory::AUDIO_OUTPUT_CONTROLLER),
+        &mirroring_manager_, &media_observer_, kStreamId, kRenderFrameId,
+        kRenderProcessId, audio_manager_->GetDefaultOutputStreamParameters(),
+        kDefaultDeviceId);
+
+    delegate->OnPlayStream();
+
+    SyncWithAllThreads();
+
+    EXPECT_CALL(mirroring_manager_, RemoveDiverter(NotNull()));
+    delegate.reset();
+    SyncWithAllThreads();
+    BrowserThread::PostTask(BrowserThread::UI, FROM_HERE, done);
+  }
+
+  void PauseTest(base::Closure done) {
+    EXPECT_CALL(media_observer_,
+                OnCreatingAudioStream(kRenderProcessId, kRenderFrameId));
+    EXPECT_CALL(event_handler_,
+                OnStreamCreated(kStreamId, NotNull(), NotNull()));
+    EXPECT_CALL(mirroring_manager_,
+                AddDiverter(kRenderProcessId, kRenderFrameId, NotNull()));
+
+    AudioOutputDelegate::ScopedPtr delegate = AudioOutputDelegate::Create(
+        &event_handler_, audio_manager_.get(),
+        log_factory_.CreateAudioLog(
+            media::AudioLogFactory::AUDIO_OUTPUT_CONTROLLER),
+        &mirroring_manager_, &media_observer_, kStreamId, kRenderFrameId,
+        kRenderProcessId, audio_manager_->GetDefaultOutputStreamParameters(),
+        kDefaultDeviceId);
+
+    delegate->OnPauseStream();
+
+    SyncWithAllThreads();
+
+    EXPECT_CALL(mirroring_manager_, RemoveDiverter(NotNull()));
+    delegate.reset();
+    SyncWithAllThreads();
+    BrowserThread::PostTask(BrowserThread::UI, FROM_HERE, done);
+  }
+
+  void PlayPausePlayTest(base::Closure done) {
+    EXPECT_CALL(media_observer_,
+                OnCreatingAudioStream(kRenderProcessId, kRenderFrameId));
+    EXPECT_CALL(event_handler_,
+                OnStreamCreated(kStreamId, NotNull(), NotNull()));
+    EXPECT_CALL(mirroring_manager_,
+                AddDiverter(kRenderProcessId, kRenderFrameId, NotNull()));
+    {
+      InSequence s;
+      EXPECT_CALL(event_handler_, OnStreamStateChanged(true));
+      EXPECT_CALL(event_handler_, OnStreamStateChanged(false));
+      EXPECT_CALL(event_handler_, OnStreamStateChanged(true));
+      EXPECT_CALL(event_handler_, OnStreamStateChanged(false));
+    }
+
+    AudioOutputDelegate::ScopedPtr delegate = AudioOutputDelegate::Create(
+        &event_handler_, audio_manager_.get(),
+        log_factory_.CreateAudioLog(
+            media::AudioLogFactory::AUDIO_OUTPUT_CONTROLLER),
+        &mirroring_manager_, &media_observer_, kStreamId, kRenderFrameId,
+        kRenderProcessId, audio_manager_->GetDefaultOutputStreamParameters(),
+        kDefaultDeviceId);
+
+    delegate->OnPlayStream();
+    delegate->OnPauseStream();
+    delegate->OnPlayStream();
+
+    SyncWithAllThreads();
+
+    EXPECT_CALL(mirroring_manager_, RemoveDiverter(NotNull()));
+    delegate.reset();
+    SyncWithAllThreads();
+    BrowserThread::PostTask(BrowserThread::UI, FROM_HERE, done);
+  }
+
+  void PlayPlayTest(base::Closure done) {
+    EXPECT_CALL(media_observer_,
+                OnCreatingAudioStream(kRenderProcessId, kRenderFrameId));
+    EXPECT_CALL(event_handler_,
+                OnStreamCreated(kStreamId, NotNull(), NotNull()));
+    EXPECT_CALL(mirroring_manager_,
+                AddDiverter(kRenderProcessId, kRenderFrameId, NotNull()));
+    {
+      InSequence s;
+      EXPECT_CALL(event_handler_, OnStreamStateChanged(true));
+      EXPECT_CALL(event_handler_, OnStreamStateChanged(false));
+    }
+
+    AudioOutputDelegate::ScopedPtr delegate = AudioOutputDelegate::Create(
+        &event_handler_, audio_manager_.get(),
+        log_factory_.CreateAudioLog(
+            media::AudioLogFactory::AUDIO_OUTPUT_CONTROLLER),
+        &mirroring_manager_, &media_observer_, kStreamId, kRenderFrameId,
+        kRenderProcessId, audio_manager_->GetDefaultOutputStreamParameters(),
+        kDefaultDeviceId);
+
+    delegate->OnPlayStream();
+    delegate->OnPlayStream();
+
+    SyncWithAllThreads();
+
+    EXPECT_CALL(mirroring_manager_, RemoveDiverter(NotNull()));
+    delegate.reset();
+    SyncWithAllThreads();
+    BrowserThread::PostTask(BrowserThread::UI, FROM_HERE, done);
+  }
+
+  void CreateDivertTest(base::Closure done) {
+    EXPECT_CALL(media_observer_,
+                OnCreatingAudioStream(kRenderProcessId, kRenderFrameId));
+    EXPECT_CALL(event_handler_,
+                OnStreamCreated(kStreamId, NotNull(), NotNull()));
+    EXPECT_CALL(mirroring_manager_,
+                AddDiverter(kRenderProcessId, kRenderFrameId, NotNull()));
+
+    AudioOutputDelegate::ScopedPtr delegate = AudioOutputDelegate::Create(
+        &event_handler_, audio_manager_.get(),
+        log_factory_.CreateAudioLog(
+            media::AudioLogFactory::AUDIO_OUTPUT_CONTROLLER),
+        &mirroring_manager_, &media_observer_, kStreamId, kRenderFrameId,
+        kRenderProcessId, audio_manager_->GetDefaultOutputStreamParameters(),
+        kDefaultDeviceId);
+
+    DummyAudioOutputStream stream;
+    delegate->controller()->StartDiverting(&stream);
+
+    SyncWithAllThreads();
+
+    EXPECT_CALL(mirroring_manager_, RemoveDiverter(NotNull()));
+    delegate.reset();
+    SyncWithAllThreads();
+    BrowserThread::PostTask(BrowserThread::UI, FROM_HERE, done);
+  }
+
+  void CreateDivertPauseTest(base::Closure done) {
+    EXPECT_CALL(media_observer_,
+                OnCreatingAudioStream(kRenderProcessId, kRenderFrameId));
+    EXPECT_CALL(event_handler_,
+                OnStreamCreated(kStreamId, NotNull(), NotNull()));
+    EXPECT_CALL(mirroring_manager_,
+                AddDiverter(kRenderProcessId, kRenderFrameId, NotNull()));
+
+    AudioOutputDelegate::ScopedPtr delegate = AudioOutputDelegate::Create(
+        &event_handler_, audio_manager_.get(),
+        log_factory_.CreateAudioLog(
+            media::AudioLogFactory::AUDIO_OUTPUT_CONTROLLER),
+        &mirroring_manager_, &media_observer_, kStreamId, kRenderFrameId,
+        kRenderProcessId, audio_manager_->GetDefaultOutputStreamParameters(),
+        kDefaultDeviceId);
+
+    DummyAudioOutputStream stream;
+    delegate->controller()->StartDiverting(&stream);
+
+    SyncWithAllThreads();
+    delegate->OnPauseStream();
+
+    SyncWithAllThreads();
+
+    EXPECT_CALL(mirroring_manager_, RemoveDiverter(NotNull()));
+    delegate.reset();
+    SyncWithAllThreads();
+    BrowserThread::PostTask(BrowserThread::UI, FROM_HERE, done);
+  }
+
+  void PlayDivertTest(base::Closure done) {
+    EXPECT_CALL(media_observer_,
+                OnCreatingAudioStream(kRenderProcessId, kRenderFrameId));
+    EXPECT_CALL(event_handler_,
+                OnStreamCreated(kStreamId, NotNull(), NotNull()));
+    EXPECT_CALL(mirroring_manager_,
+                AddDiverter(kRenderProcessId, kRenderFrameId, NotNull()));
+    {
+      InSequence s;
+      EXPECT_CALL(event_handler_, OnStreamStateChanged(true));
+      EXPECT_CALL(event_handler_, OnStreamStateChanged(false));
+    }
+
+    AudioOutputDelegate::ScopedPtr delegate = AudioOutputDelegate::Create(
+        &event_handler_, audio_manager_.get(),
+        log_factory_.CreateAudioLog(
+            media::AudioLogFactory::AUDIO_OUTPUT_CONTROLLER),
+        &mirroring_manager_, &media_observer_, kStreamId, kRenderFrameId,
+        kRenderProcessId, audio_manager_->GetDefaultOutputStreamParameters(),
+        kDefaultDeviceId);
+
+    DummyAudioOutputStream stream;
+    delegate->OnPlayStream();
+    delegate->controller()->StartDiverting(&stream);
+
+    SyncWithAllThreads();
+
+    EXPECT_CALL(mirroring_manager_, RemoveDiverter(NotNull()));
+    delegate.reset();
+    SyncWithAllThreads();
+    BrowserThread::PostTask(BrowserThread::UI, FROM_HERE, done);
+  }
+
+  void ErrorTest(base::Closure done) {
+    EXPECT_CALL(media_observer_,
+                OnCreatingAudioStream(kRenderProcessId, kRenderFrameId));
+    EXPECT_CALL(event_handler_,
+                OnStreamCreated(kStreamId, NotNull(), NotNull()));
+    EXPECT_CALL(event_handler_, OnStreamError(kStreamId));
+    EXPECT_CALL(mirroring_manager_,
+                AddDiverter(kRenderProcessId, kRenderFrameId, NotNull()));
+
+    AudioOutputDelegate::ScopedPtr delegate = AudioOutputDelegate::Create(
+        &event_handler_, audio_manager_.get(),
+        log_factory_.CreateAudioLog(
+            media::AudioLogFactory::AUDIO_OUTPUT_CONTROLLER),
+        &mirroring_manager_, &media_observer_, kStreamId, kRenderFrameId,
+        kRenderProcessId, audio_manager_->GetDefaultOutputStreamParameters(),
+        kDefaultDeviceId);
+
+    delegate->controller()->OnError(nullptr);
+
+    SyncWithAllThreads();
+
+    EXPECT_CALL(mirroring_manager_, RemoveDiverter(NotNull()));
+    delegate.reset();
+    SyncWithAllThreads();
+    BrowserThread::PostTask(BrowserThread::UI, FROM_HERE, done);
+  }
+
+  void CreateAndDestroyTest(base::Closure done) {
+    EXPECT_CALL(media_observer_,
+                OnCreatingAudioStream(kRenderProcessId, kRenderFrameId));
+    EXPECT_CALL(mirroring_manager_,
+                AddDiverter(kRenderProcessId, kRenderFrameId, NotNull()));
+    EXPECT_CALL(mirroring_manager_, RemoveDiverter(NotNull()));
+
+    AudioOutputDelegate::ScopedPtr delegate = AudioOutputDelegate::Create(
+        &event_handler_, audio_manager_.get(),
+        log_factory_.CreateAudioLog(
+            media::AudioLogFactory::AUDIO_OUTPUT_CONTROLLER),
+        &mirroring_manager_, &media_observer_, kStreamId, kRenderFrameId,
+        kRenderProcessId, audio_manager_->GetDefaultOutputStreamParameters(),
+        kDefaultDeviceId);
+
+    delegate.reset();
+    SyncWithAllThreads();
+    BrowserThread::PostTask(BrowserThread::UI, FROM_HERE, done);
+  }
+
+  void PlayAndDestroyTest(base::Closure done) {
+    EXPECT_CALL(media_observer_,
+                OnCreatingAudioStream(kRenderProcessId, kRenderFrameId));
+    EXPECT_CALL(event_handler_,
+                OnStreamCreated(kStreamId, NotNull(), NotNull()));
+    EXPECT_CALL(mirroring_manager_,
+                AddDiverter(kRenderProcessId, kRenderFrameId, NotNull()));
+    EXPECT_CALL(mirroring_manager_, RemoveDiverter(NotNull()));
+
+    AudioOutputDelegate::ScopedPtr delegate = AudioOutputDelegate::Create(
+        &event_handler_, audio_manager_.get(),
+        log_factory_.CreateAudioLog(
+            media::AudioLogFactory::AUDIO_OUTPUT_CONTROLLER),
+        &mirroring_manager_, &media_observer_, kStreamId, kRenderFrameId,
+        kRenderProcessId, audio_manager_->GetDefaultOutputStreamParameters(),
+        kDefaultDeviceId);
+
+    SyncWithAllThreads();
+
+    delegate->OnPlayStream();
+    delegate.reset();
+    SyncWithAllThreads();
+    BrowserThread::PostTask(BrowserThread::UI, FROM_HERE, done);
+  }
+
+  void ErrorAndDestroyTest(base::Closure done) {
+    EXPECT_CALL(media_observer_,
+                OnCreatingAudioStream(kRenderProcessId, kRenderFrameId));
+    EXPECT_CALL(event_handler_,
+                OnStreamCreated(kStreamId, NotNull(), NotNull()));
+    EXPECT_CALL(mirroring_manager_,
+                AddDiverter(kRenderProcessId, kRenderFrameId, NotNull()));
+    EXPECT_CALL(mirroring_manager_, RemoveDiverter(NotNull()));
+
+    AudioOutputDelegate::ScopedPtr delegate = AudioOutputDelegate::Create(
+        &event_handler_, audio_manager_.get(),
+        log_factory_.CreateAudioLog(
+            media::AudioLogFactory::AUDIO_OUTPUT_CONTROLLER),
+        &mirroring_manager_, &media_observer_, kStreamId, kRenderFrameId,
+        kRenderProcessId, audio_manager_->GetDefaultOutputStreamParameters(),
+        kDefaultDeviceId);
+    SyncWithAllThreads();
+
+    delegate->controller()->OnError(nullptr);
+    delegate.reset();
+    SyncWithAllThreads();
+    BrowserThread::PostTask(BrowserThread::UI, FROM_HERE, done);
+  }
+
+ protected:
+  // MediaStreamManager uses a DestructionObserver, so it must outlive the
+  // TestBrowserThreadBundle.
+  std::unique_ptr<MediaStreamManager> media_stream_manager_;
+  std::unique_ptr<TestBrowserThreadBundle> thread_bundle_;
+  std::unique_ptr<base::Thread> audio_thread_;
+  media::ScopedAudioManagerPtr audio_manager_;
+  StrictMock<MockAudioMirroringManager> mirroring_manager_;
+  StrictMock<MockEventHandler> event_handler_;
+  StrictMock<MockObserver> media_observer_;
+  media::FakeAudioLogFactory log_factory_;
+
+ private:
+  void SyncWithAllThreads() {
+    DCHECK_CURRENTLY_ON(BrowserThread::IO);
+    // New tasks might be posted while we are syncing, but in every iteration at
+    // least one task will be run. 20 iterations should be enough for our code.
+    for (int i = 0; i < 20; ++i) {
+      {
+        base::MessageLoop::ScopedNestableTaskAllower allower(
+            base::MessageLoop::current());
+        base::RunLoop().RunUntilIdle();
+      }
+      SyncWith(BrowserThread::GetTaskRunnerForThread(BrowserThread::UI));
+      SyncWith(audio_thread_->task_runner());
+    }
+  }
+
+  void SyncWith(scoped_refptr<base::SingleThreadTaskRunner> task_runner) {
+    CHECK(task_runner);
+    CHECK(!task_runner->BelongsToCurrentThread());
+    base::WaitableEvent e = {base::WaitableEvent::ResetPolicy::MANUAL,
+                             base::WaitableEvent::InitialState::NOT_SIGNALED};
+    task_runner->PostTask(FROM_HERE, base::Bind(&base::WaitableEvent::Signal,
+                                                base::Unretained(&e)));
+    e.Wait();
+  }
+
+  DISALLOW_COPY_AND_ASSIGN(AudioOutputDelegateTest);
+};
+
+TEST_F(AudioOutputDelegateTest, Create) {
+  base::RunLoop l;
+  BrowserThread::PostTask(BrowserThread::IO, FROM_HERE,
+                          base::Bind(&AudioOutputDelegateTest::CreateTest,
+                                     base::Unretained(this), l.QuitClosure()));
+  l.Run();
+}
+
+TEST_F(AudioOutputDelegateTest, Play) {
+  base::RunLoop l;
+  BrowserThread::PostTask(BrowserThread::IO, FROM_HERE,
+                          base::Bind(&AudioOutputDelegateTest::PlayTest,
+                                     base::Unretained(this), l.QuitClosure()));
+  l.Run();
+}
+
+TEST_F(AudioOutputDelegateTest, Pause) {
+  base::RunLoop l;
+  BrowserThread::PostTask(BrowserThread::IO, FROM_HERE,
+                          base::Bind(&AudioOutputDelegateTest::PauseTest,
+                                     base::Unretained(this), l.QuitClosure()));
+  l.Run();
+}
+
+TEST_F(AudioOutputDelegateTest, PlayPausePlay) {
+  base::RunLoop l;
+  BrowserThread::PostTask(
+      BrowserThread::IO, FROM_HERE,
+      base::Bind(&AudioOutputDelegateTest::PlayPausePlayTest,
+                 base::Unretained(this), l.QuitClosure()));
+  l.Run();
+}
+
+TEST_F(AudioOutputDelegateTest, PlayPlay) {
+  base::RunLoop l;
+  BrowserThread::PostTask(BrowserThread::IO, FROM_HERE,
+                          base::Bind(&AudioOutputDelegateTest::PlayPlayTest,
+                                     base::Unretained(this), l.QuitClosure()));
+  l.Run();
+}
+
+TEST_F(AudioOutputDelegateTest, PlayDivert) {
+  base::RunLoop l;
+  BrowserThread::PostTask(BrowserThread::IO, FROM_HERE,
+                          base::Bind(&AudioOutputDelegateTest::PlayDivertTest,
+                                     base::Unretained(this), l.QuitClosure()));
+  l.Run();
+}
+
+TEST_F(AudioOutputDelegateTest, CreateDivert) {
+  base::RunLoop l;
+  BrowserThread::PostTask(BrowserThread::IO, FROM_HERE,
+                          base::Bind(&AudioOutputDelegateTest::CreateDivertTest,
+                                     base::Unretained(this), l.QuitClosure()));
+  l.Run();
+}
+
+TEST_F(AudioOutputDelegateTest, Error) {
+  base::RunLoop l;
+  BrowserThread::PostTask(BrowserThread::IO, FROM_HERE,
+                          base::Bind(&AudioOutputDelegateTest::ErrorTest,
+                                     base::Unretained(this), l.QuitClosure()));
+  l.Run();
+}
+
+TEST_F(AudioOutputDelegateTest, CreateAndDestroy) {
+  base::RunLoop l;
+  BrowserThread::PostTask(
+      BrowserThread::IO, FROM_HERE,
+      base::Bind(&AudioOutputDelegateTest::CreateAndDestroyTest,
+                 base::Unretained(this), l.QuitClosure()));
+  l.Run();
+}
+
+TEST_F(AudioOutputDelegateTest, PlayAndDestroy) {
+  base::RunLoop l;
+  BrowserThread::PostTask(
+      BrowserThread::IO, FROM_HERE,
+      base::Bind(&AudioOutputDelegateTest::PlayAndDestroyTest,
+                 base::Unretained(this), l.QuitClosure()));
+  l.Run();
+}
+
+TEST_F(AudioOutputDelegateTest, ErrorAndDestroy) {
+  base::RunLoop l;
+  BrowserThread::PostTask(
+      BrowserThread::IO, FROM_HERE,
+      base::Bind(&AudioOutputDelegateTest::PlayAndDestroyTest,
+                 base::Unretained(this), l.QuitClosure()));
+  l.Run();
+}
+
+}  // namespace content