Switching WebRTC browser test from AudioManager::HasAudioOutputDevices() to AudioSystem interface.

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 80 matching lines @@
     EXPECT_EQ(expected.AsHumanReadableString(),
               received.AsHumanReadableString());
     AudioParametersReceived();
   }
 
   void OnHasInputDevices(bool result) {
     EXPECT_TRUE(thread_checker_.CalledOnValidThread());
     HasInputDevicesCallback(result);
   }
 
+  void OnHasOutputDevices(bool result) {
+    EXPECT_TRUE(thread_checker_.CalledOnValidThread());
+    HasOutputDevicesCallback(result);
+  }
+
   void OnGetDeviceDescriptions(
       const AudioDeviceDescriptions& expected_descriptions,
       AudioDeviceDescriptions descriptions) {
     EXPECT_TRUE(thread_checker_.CalledOnValidThread());
     EXPECT_EQ(expected_descriptions, descriptions);
     DeviceDescriptionsReceived();
   }
 
   void WaitForCallback() {
     if (!use_audio_thread_) {
       base::RunLoop().RunUntilIdle();
       return;
     }
     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();
   }
 
   // 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));
 
  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_;
   AudioParameters input_params_;
@@ skipping 64 matching lines @@
 }
 
 TEST_P(AudioSystemImplTest, HasNoInputDevices) {
   audio_manager_->SetHasInputDevices(false);
   EXPECT_CALL(*this, HasInputDevicesCallback(false));
   audio_system_->HasInputDevices(base::Bind(
       &AudioSystemImplTest::OnHasInputDevices, base::Unretained(this)));
   WaitForCallback();
 }
 
+TEST_P(AudioSystemImplTest, HasOutputDevices) {
+  EXPECT_CALL(*this, HasOutputDevicesCallback(true));
+  audio_system_->HasOutputDevices(base::Bind(
+      &AudioSystemImplTest::OnHasOutputDevices, base::Unretained(this)));
+  WaitForCallback();
+}
+
+TEST_P(AudioSystemImplTest, HasNoOutputDevices) {
+  audio_manager_->SetHasOutputDevices(false);
+  EXPECT_CALL(*this, HasOutputDevicesCallback(false));
+  audio_system_->HasOutputDevices(base::Bind(
+      &AudioSystemImplTest::OnHasOutputDevices, base::Unretained(this)));
+  WaitForCallback();
+}
+
 TEST_P(AudioSystemImplTest, GetInputDeviceDescriptionsNoInputDevices) {
   output_device_descriptions_.emplace_back("output_device_name",
                                            "output_device_id", "group_id");
   EXPECT_EQ(0, static_cast<int>(input_device_descriptions_.size()));
   EXPECT_EQ(1, static_cast<int>(output_device_descriptions_.size()));
   EXPECT_CALL(*this, DeviceDescriptionsReceived());
   audio_system_->GetDeviceDescriptions(
       base::Bind(&AudioSystemImplTest::OnGetDeviceDescriptions,
                  base::Unretained(this), input_device_descriptions_),
       true);
@@ skipping 43 matching lines @@
   audio_system_->GetDeviceDescriptions(
       base::Bind(&AudioSystemImplTest::OnGetDeviceDescriptions,
                  base::Unretained(this), output_device_descriptions_),
       false);
   WaitForCallback();
 }
 
 INSTANTIATE_TEST_CASE_P(, AudioSystemImplTest, testing::Values(false, true));
 
 }  // namespace media