Ensures that audio tasks cannot run after AudioManager is deleted.

content/browser/renderer_host/media/audio_input_device_manager_unittest.cc

 // 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 "content/browser/renderer_host/media/audio_input_device_manager.h"
 
 #include <stddef.h>
 
 #include <memory>
 #include <string>
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/location.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/run_loop.h"
 #include "base/single_thread_task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "build/build_config.h"
 #include "content/public/common/media_stream_request.h"
 #include "content/public/test/test_browser_thread_bundle.h"
 #include "media/audio/audio_manager_base.h"
 #include "media/audio/audio_system_impl.h"
+#include "media/audio/audio_thread_impl.h"
 #include "media/base/media_switches.h"
 #include "media/base/test_helpers.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using testing::InSequence;
 
 namespace content {
 
 class MockAudioInputDeviceManagerListener
@@ skipping 18 matching lines @@
 // AudioInputDeviceManager::Open() must be called on the audio thread.
 // This test suite must be modified to run on Android.
 #if defined(OS_ANDROID)
 #define MAYBE_AudioInputDeviceManagerTest DISABLED_AudioInputDeviceManagerTest
 #else
 #define MAYBE_AudioInputDeviceManagerTest AudioInputDeviceManagerTest
 #endif
 
 class MAYBE_AudioInputDeviceManagerTest : public testing::Test {
  public:
-  MAYBE_AudioInputDeviceManagerTest() : audio_thread_("AudioSystemThread") {
-    audio_thread_.StartAndWaitForTesting();
-  }
+  MAYBE_AudioInputDeviceManagerTest() {}
 
  protected:
   void SetUp() override {
     base::CommandLine::ForCurrentProcess()->AppendSwitch(
         switches::kUseFakeDeviceForMediaStream);
     // AudioInputDeviceManager accesses AudioSystem from IO thread, so it never
     // runs on the same thread with it, even on Mac.
-    audio_manager_ =
-        media::AudioManager::CreateForTesting(audio_thread_.task_runner());
+    audio_manager_ = media::AudioManager::CreateForTesting(
+        base::MakeUnique<media::AudioThreadImpl>());
     // Flush the message loop to ensure proper initialization of AudioManager.
     base::RunLoop().RunUntilIdle();
 
     audio_system_ = media::AudioSystemImpl::Create(audio_manager_.get());
     manager_ = new AudioInputDeviceManager(audio_system_.get());
     audio_input_listener_.reset(new MockAudioInputDeviceManagerListener());
     manager_->RegisterListener(audio_input_listener_.get());
 
     // Use fake devices.
     devices_.emplace_back(MEDIA_DEVICE_AUDIO_CAPTURE, "Fake Device 1",
                           "fake_device_1");
     devices_.emplace_back(MEDIA_DEVICE_AUDIO_CAPTURE, "Fake Device 2",
                           "fake_device_2");
 
     // Wait until we get the list.
     base::RunLoop().RunUntilIdle();
   }
 
   void TearDown() override {
     manager_->UnregisterListener(audio_input_listener_.get());
-    audio_system_.reset();
-    audio_manager_.reset();
-    audio_thread_.Stop();
+    audio_manager_->Shutdown();
   }
 
   void WaitForOpenCompletion() {
     media::WaitableMessageLoopEvent event;
-    audio_thread_.task_runner()->PostTaskAndReply(
+    audio_manager_->GetTaskRunner()->PostTaskAndReply(
         FROM_HERE, base::Bind(&base::DoNothing), event.GetClosure());
-    // Runs the loop and waits for the |audio_thread_| to call event's
+    // Runs the loop and waits for the audio thread to call event's
     // closure.
     event.RunAndWait();
     base::RunLoop().RunUntilIdle();
   }
 
   TestBrowserThreadBundle thread_bundle_;
-  base::Thread audio_thread_;
-  media::ScopedAudioManagerPtr audio_manager_;
+  std::unique_ptr<media::AudioManager> audio_manager_;
   std::unique_ptr<media::AudioSystem> audio_system_;
   scoped_refptr<AudioInputDeviceManager> manager_;
   std::unique_ptr<MockAudioInputDeviceManagerListener> audio_input_listener_;
   StreamDeviceInfoArray devices_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(MAYBE_AudioInputDeviceManagerTest);
 };
 
 // Opens and closes the devices.
@@ skipping 171 matching lines @@
   DCHECK(!info);
 
   manager_->Close(session_id);
   EXPECT_CALL(*audio_input_listener_,
               Closed(MEDIA_DEVICE_AUDIO_CAPTURE, session_id))
       .Times(1);
   base::RunLoop().RunUntilIdle();
 }
 
 }  // namespace content