Ensures that audio tasks cannot run after AudioManager is deleted.

media/audio/audio_system_impl_unittest.cc

 // Copyright 2017 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 "media/audio/audio_system_impl.h"
 #include "base/memory/ptr_util.h"
 #include "base/run_loop.h"
 #include "base/single_thread_task_runner.h"
 #include "base/task_runner_util.h"
 #include "base/threading/thread.h"
 #include "base/threading/thread_checker.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "media/audio/audio_device_description.h"
+#include "media/audio/audio_thread_impl.h"
 #include "media/audio/mock_audio_manager.h"
+#include "media/audio/test_audio_thread.h"
 #include "media/base/test_helpers.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace {
 const char* kNonDefaultDeviceId = "non-default-device-id";
 }
 
 namespace media {
 
 bool operator==(const media::AudioDeviceDescription& lhs,
                 const media::AudioDeviceDescription& rhs) {
   return lhs.device_name == rhs.device_name && lhs.unique_id == rhs.unique_id &&
          lhs.group_id == rhs.group_id;
 }
 
 class AudioSystemImplTest : public testing::TestWithParam<bool> {
  public:
   AudioSystemImplTest()
       : use_audio_thread_(GetParam()),
-        audio_thread_("AudioSystemThread"),
         input_params_(AudioParameters::AUDIO_PCM_LINEAR,
                       CHANNEL_LAYOUT_MONO,
                       AudioParameters::kTelephoneSampleRate,
                       16,
                       AudioParameters::kTelephoneSampleRate / 10),
         output_params_(AudioParameters::AUDIO_PCM_LINEAR,
                        CHANNEL_LAYOUT_MONO,
                        AudioParameters::kTelephoneSampleRate,
                        16,
                        AudioParameters::kTelephoneSampleRate / 20),
         default_output_params_(AudioParameters::AUDIO_PCM_LINEAR,
                                CHANNEL_LAYOUT_MONO,
                                AudioParameters::kTelephoneSampleRate,
                                16,
                                AudioParameters::kTelephoneSampleRate / 30) {
-    if (use_audio_thread_) {
-      audio_thread_.StartAndWaitForTesting();
-      audio_manager_.reset(
-          new media::MockAudioManager(audio_thread_.task_runner()));
-    } else {
-      audio_manager_.reset(new media::MockAudioManager(
-          base::ThreadTaskRunnerHandle::Get().get()));
-    }
-
+    audio_manager_ = base::MakeUnique<MockAudioManager>(
+        base::MakeUnique<TestAudioThread>(use_audio_thread_));
     audio_manager_->SetInputStreamParameters(input_params_);
     audio_manager_->SetOutputStreamParameters(output_params_);
     audio_manager_->SetDefaultOutputStreamParameters(default_output_params_);
 
     auto get_device_descriptions = [](const AudioDeviceDescriptions* source,
                                       AudioDeviceDescriptions* destination) {
       destination->insert(destination->end(), source->begin(), source->end());
     };
 
     audio_manager_->SetInputDeviceDescriptionsCallback(
         base::Bind(get_device_descriptions,
                    base::Unretained(&input_device_descriptions_)));
     audio_manager_->SetOutputDeviceDescriptionsCallback(
         base::Bind(get_device_descriptions,
                    base::Unretained(&output_device_descriptions_)));
 
     audio_system_ = media::AudioSystemImpl::Create(audio_manager_.get());
     EXPECT_EQ(AudioSystem::Get(), audio_system_.get());
   }
 
-  ~AudioSystemImplTest() override {
-    // Deleting |audio_manager_| on its thread.
-    audio_system_.reset();
-    EXPECT_EQ(AudioSystem::Get(), nullptr);
-    audio_manager_.reset();
-    audio_thread_.Stop();
-  }
+  ~AudioSystemImplTest() override { audio_manager_->Shutdown(); }
 
   void OnAudioParams(const AudioParameters& expected,
                      const AudioParameters& received) {
     EXPECT_TRUE(thread_checker_.CalledOnValidThread());
     EXPECT_EQ(expected.AsHumanReadableString(),
               received.AsHumanReadableString());
     AudioParametersReceived();
   }
 
   void OnHasInputDevices(bool result) {
@@ skipping 28 matching lines @@
     EXPECT_EQ(expected_associated_device_id, associated_device_id);
     InputDeviceInfoReceived();
   }
 
   void WaitForCallback() {
     if (!use_audio_thread_) {
       base::RunLoop().RunUntilIdle();
       return;
     }
     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 closure,
     // which means AudioSystem reply containing device parameters is already
     // queued on the main thread.
     event.RunAndWait();
     base::RunLoop().RunUntilIdle();
   }
 
   // Mocks to verify that AudioSystem replied with an expected callback.
   MOCK_METHOD0(AudioParametersReceived, void(void));
   MOCK_METHOD1(HasInputDevicesCallback, void(bool));
   MOCK_METHOD1(HasOutputDevicesCallback, void(bool));
   MOCK_METHOD0(DeviceDescriptionsReceived, void(void));
   MOCK_METHOD1(AssociatedOutputDeviceIDReceived, void(const std::string&));
   MOCK_METHOD0(InputDeviceInfoReceived, void(void));
 
  protected:
   base::MessageLoop message_loop_;
   base::ThreadChecker thread_checker_;
   bool use_audio_thread_;
-  base::Thread audio_thread_;
-  MockAudioManager::UniquePtr audio_manager_;
+  std::unique_ptr<media::MockAudioManager> audio_manager_;
   std::unique_ptr<media::AudioSystem> audio_system_;
   AudioParameters input_params_;
   AudioParameters output_params_;
   AudioParameters default_output_params_;
   AudioDeviceDescriptions input_device_descriptions_;
   AudioDeviceDescriptions output_device_descriptions_;
 };
 
 TEST_P(AudioSystemImplTest, GetInputStreamParameters) {
   EXPECT_CALL(*this, AudioParametersReceived());
@@ skipping 176 matching lines @@
   audio_system_->GetInputDeviceInfo(
       kNonDefaultDeviceId, base::Bind(&AudioSystemImplTest::OnInputDeviceInfo,
                                       base::Unretained(this), input_params_,
                                       output_params_, associated_id));
   WaitForCallback();
 }
 
 INSTANTIATE_TEST_CASE_P(, AudioSystemImplTest, testing::Values(false, true));
 
 }  // namespace media