Switching VirtualKeyboardPrivate keyboard config call stack to receive HasInputDevices() responce a…

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"
@@ skipping 15 matching lines @@
       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_->SetInputStreamParameters(
         media::AudioParameters::UnavailableDeviceParams());
     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();
   }
 
   void OnAudioParams(const AudioParameters& expected,
                      const AudioParameters& received) {
     EXPECT_TRUE(thread_checker_.CalledOnValidThread());
     EXPECT_EQ(expected.AsHumanReadableString(),
               received.AsHumanReadableString());
     AudioParametersReceived();
   }
 
   void WaitForCallback() {
     if (!use_audio_thread_) {
       base::RunLoop().RunUntilIdle();
       return;
     }
     media::WaitableMessageLoopEvent event;
     audio_thread_.task_runner()->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();
   }
 
   MOCK_METHOD0(AudioParametersReceived, void(void));
+  MOCK_METHOD1(HasInputDevicesCallback, void(bool));
 
  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::AudioSystem> audio_system_;
 };
 
 TEST_P(AudioSystemImplTest, GetInputStreamParameters) {
   EXPECT_CALL(*this, AudioParametersReceived());
   audio_system_->GetInputStreamParameters(
       media::AudioDeviceDescription::kDefaultDeviceId,
       base::Bind(&AudioSystemImplTest::OnAudioParams, base::Unretained(this),
                  media::AudioParameters::UnavailableDeviceParams()));
   WaitForCallback();
 }
 
 TEST_P(AudioSystemImplTest, GetInputStreamParametersNoDevice) {
   audio_manager_->SetHasInputDevices(false);
   EXPECT_CALL(*this, AudioParametersReceived());
   audio_system_->GetInputStreamParameters(
       media::AudioDeviceDescription::kDefaultDeviceId,
       base::Bind(&AudioSystemImplTest::OnAudioParams, base::Unretained(this),
                  media::AudioParameters()));
   WaitForCallback();
 }
 
+TEST_P(AudioSystemImplTest, HasInputDevices) {
+  EXPECT_CALL(*this, HasInputDevicesCallback(true));
+  audio_system_->HasInputDevices(base::Bind(
+      &AudioSystemImplTest::HasInputDevicesCallback, base::Unretained(this)));
+  WaitForCallback();
+}
+
+TEST_P(AudioSystemImplTest, HasNoInputDevices) {
+  audio_manager_->SetHasInputDevices(false);
+  EXPECT_CALL(*this, HasInputDevicesCallback(false));
+  audio_system_->HasInputDevices(base::Bind(
+      &AudioSystemImplTest::HasInputDevicesCallback, base::Unretained(this)));
+  WaitForCallback();
+}
+
 INSTANTIATE_TEST_CASE_P(, AudioSystemImplTest, testing::Values(false, true));
 
 }  // namespace media