Ensures that audio tasks cannot run after AudioManager is deleted.

content/browser/renderer_host/media/media_devices_manager_unittest.cc

 // 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/media_devices_manager.h"
 
 #include <memory>
 #include <string>
 
 #include "base/bind.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/run_loop.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "content/browser/renderer_host/media/in_process_video_capture_provider.h"
 #include "content/browser/renderer_host/media/video_capture_manager.h"
 #include "content/public/test/test_browser_thread_bundle.h"
 #include "media/audio/audio_device_name.h"
 #include "media/audio/audio_system_impl.h"
 #include "media/audio/fake_audio_log_factory.h"
 #include "media/audio/fake_audio_manager.h"
+#include "media/audio/test_audio_thread.h"
 #include "media/capture/video/fake_video_capture_device_factory.h"
 #include "media/capture/video/video_capture_system_impl.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using testing::_;
 using testing::SaveArg;
 
 namespace content {
 
 namespace {
 
 // Number of client enumerations to simulate on each test run.
 // This allows testing that a single call to low-level enumeration functions
 // is performed when cache is enabled, regardless of the number of client calls.
 const int kNumCalls = 3;
 
 // This class mocks the audio manager and overrides some methods to ensure that
 // we can run simulate device changes.
 class MockAudioManager : public media::FakeAudioManager {
  public:
   MockAudioManager()
-      : FakeAudioManager(base::ThreadTaskRunnerHandle::Get(),
-                         base::ThreadTaskRunnerHandle::Get(),
+      : FakeAudioManager(base::MakeUnique<media::TestAudioThread>(),
                          &fake_audio_log_factory_),
         num_output_devices_(2),
         num_input_devices_(2) {}
   ~MockAudioManager() override {}
 
   MOCK_METHOD1(MockGetAudioInputDeviceNames, void(media::AudioDeviceNames*));
   MOCK_METHOD1(MockGetAudioOutputDeviceNames, void(media::AudioDeviceNames*));
 
   void GetAudioInputDeviceNames(
       media::AudioDeviceNames* device_names) override {
@@ skipping 66 matching lines @@
                void(MediaDeviceType, const MediaDeviceInfoArray&));
 };
 
 }  // namespace
 
 class MediaDevicesManagerTest : public ::testing::Test {
  public:
   MediaDevicesManagerTest()
       : thread_bundle_(content::TestBrowserThreadBundle::IO_MAINLOOP),
         video_capture_device_factory_(nullptr) {}
-  ~MediaDevicesManagerTest() override {}
+  ~MediaDevicesManagerTest() override { audio_manager_->Shutdown(); }
 
   MOCK_METHOD1(MockCallback, void(const MediaDeviceEnumeration&));
 
   void EnumerateCallback(base::RunLoop* run_loop,
                          const MediaDeviceEnumeration& result) {
     MockCallback(result);
     run_loop->Quit();
   }
 
  protected:
@@ skipping 20 matching lines @@
         type, MediaDevicesManager::CachePolicy::SYSTEM_MONITOR);
   }
 
   // Must outlive MediaDevicesManager as ~MediaDevicesManager() verifies it's
   // running on the IO thread.
   TestBrowserThreadBundle thread_bundle_;
 
   std::unique_ptr<MediaDevicesManager> media_devices_manager_;
   scoped_refptr<VideoCaptureManager> video_capture_manager_;
   MockVideoCaptureDeviceFactory* video_capture_device_factory_;
-  std::unique_ptr<MockAudioManager, media::AudioManagerDeleter> audio_manager_;
+  std::unique_ptr<MockAudioManager> audio_manager_;
   std::unique_ptr<media::AudioSystem> audio_system_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(MediaDevicesManagerTest);
 };
 
 TEST_F(MediaDevicesManagerTest, EnumerateNoCacheAudioInput) {
   EXPECT_CALL(*audio_manager_, MockGetAudioInputDeviceNames(_))
       .Times(kNumCalls);
   EXPECT_CALL(*video_capture_device_factory_, MockGetDeviceDescriptors())
@@ skipping 391 matching lines @@
   media_devices_manager_->OnDevicesChanged(base::SystemMonitor::DEVTYPE_AUDIO);
   media_devices_manager_->OnDevicesChanged(
       base::SystemMonitor::DEVTYPE_VIDEO_CAPTURE);
   base::RunLoop().RunUntilIdle();
   EXPECT_EQ(num_audio_input_devices, notification_all_audio_input.size());
   EXPECT_EQ(num_video_input_devices, notification_all_video_input.size());
   EXPECT_EQ(num_audio_output_devices, notification_all_audio_output.size());
 }
 
 }  // namespace content