Replace AudioManager::GetAudio*DeviceNames with AudioManager::GetAudio*DeviceDescriptions

media/audio/audio_manager_unittest.cc

 // Copyright 2013 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_manager.h"
 
 #include <memory>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/environment.h"
 #include "base/logging.h"
 #include "base/run_loop.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/test/test_message_loop.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "build/build_config.h"
 #include "media/audio/audio_device_description.h"
+#include "media/audio/audio_device_name.h"
 #include "media/audio/audio_output_proxy.h"
 #include "media/audio/audio_unittest_util.h"
 #include "media/audio/fake_audio_log_factory.h"
 #include "media/audio/fake_audio_manager.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 #if defined(USE_ALSA)
 #include "media/audio/alsa/audio_manager_alsa.h"
 #endif  // defined(USE_ALSA)
 
@@ skipping 216 matching lines @@
         1024);
     std::unique_ptr<PCMWaveInAudioInputStream> stream(
         static_cast<PCMWaveInAudioInputStream*>(
             amw->CreatePCMWaveInAudioInputStream(parameters, device_id)));
     return stream.get() ? stream->device_id_ : std::string();
   }
 #endif
 
   // Helper method which verifies that the device list starts with a valid
   // default record followed by non-default device names.
-  static void CheckDeviceNames(const AudioDeviceNames& device_names) {
-    DVLOG(2) << "Got " << device_names.size() << " audio devices.";
-    if (!device_names.empty()) {
-      AudioDeviceNames::const_iterator it = device_names.begin();
+  static void CheckDeviceDescriptions(
+      const AudioDeviceDescriptions& device_descriptions) {
+    DVLOG(2) << "Got " << device_descriptions.size() << " audio devices.";
+    if (!device_descriptions.empty()) {
+      AudioDeviceDescriptions::const_iterator it = device_descriptions.begin();
 
       // The first device in the list should always be the default device.
       EXPECT_EQ(AudioDeviceDescription::GetDefaultDeviceName(),
                 it->device_name);
       EXPECT_EQ(std::string(AudioDeviceDescription::kDefaultDeviceId),
                 it->unique_id);
       ++it;
 
       // Other devices should have non-empty name and id and should not contain
       // default name or id.
-      while (it != device_names.end()) {
+      while (it != device_descriptions.end()) {
         EXPECT_FALSE(it->device_name.empty());
         EXPECT_FALSE(it->unique_id.empty());
+        EXPECT_FALSE(it->group_id.empty());
         DVLOG(2) << "Device ID(" << it->unique_id
-                 << "), label: " << it->device_name;
+                 << "), label: " << it->device_name
+                 << "group: " << it->group_id;
         EXPECT_NE(AudioDeviceDescription::GetDefaultDeviceName(),
                   it->device_name);
         EXPECT_NE(std::string(AudioDeviceDescription::kDefaultDeviceId),
                   it->unique_id);
         ++it;
       }
     } else {
       // Log a warning so we can see the status on the build bots.  No need to
       // break the test though since this does successfully test the code and
       // some failure cases.
       LOG(WARNING) << "No input devices detected";
     }
   }
 
 #if defined(USE_CRAS)
   // Helper method for (USE_CRAS) which verifies that the device list starts
   // with a valid default record followed by physical device names.
-  static void CheckDeviceNamesCras(
-      const AudioDeviceNames& device_names,
+  static void CheckDeviceDescriptionsCras(
+      const AudioDeviceDescriptions& device_descriptions,
       const std::map<uint64_t, std::string>& expectation) {
-    DVLOG(2) << "Got " << device_names.size() << " audio devices.";
-    if (!device_names.empty()) {
-      AudioDeviceNames::const_iterator it = device_names.begin();
+    DVLOG(2) << "Got " << device_descriptions.size() << " audio devices.";
+    if (!device_descriptions.empty()) {
+      AudioDeviceDescriptions::const_iterator it = device_descriptions.begin();
 
       // The first device in the list should always be the default device.
       EXPECT_EQ(AudioDeviceDescription::GetDefaultDeviceName(),
                 it->device_name);
       EXPECT_EQ(std::string(AudioDeviceDescription::kDefaultDeviceId),
                 it->unique_id);
 
-      // |device_names|'size should be |expectation|'s size plus one because of
+      // |device_descriptions|'size should be |expectation|'s size plus one
+      // because of
       // default device.
-      EXPECT_EQ(device_names.size(), expectation.size() + 1);
+      EXPECT_EQ(device_descriptions.size(), expectation.size() + 1);
       ++it;
       // Check other devices that should have non-empty name and id, and should
       // be contained in expectation.
-      while (it != device_names.end()) {
+      while (it != device_descriptions.end()) {
         EXPECT_FALSE(it->device_name.empty());
-        EXPECT_FALSE(it->unique_id.empty());
+        EXPECT_FALSE(it->group_id.empty());

[Guido Urdaneta, 2016/12/08 15:53:37]

It looks like unique_id got renamed to group_id here.
Shouldn't you check both, or at least check unique_id?

[o1ka, 2016/12/09 14:56:30]

Done.

         DVLOG(2) << "Device ID(" << it->unique_id
-                 << "), label: " << it->device_name;
+                 << "), label: " << it->device_name
+                 << "group: " << it->group_id;
         uint64_t key;
         EXPECT_TRUE(base::StringToUint64(it->unique_id, &key));
         EXPECT_TRUE(expectation.find(key) != expectation.end());
         EXPECT_EQ(expectation.find(key)->second, it->device_name);
         ++it;
       }
     } else {
       // Log a warning so we can see the status on the build bots. No need to
       // break the test though since this does successfully test the code and
       // some failure cases.
@@ skipping 56 matching lines @@
   std::map<uint64_t, std::string> expectation;
   expectation[kJabraMic1.id] =
       cras_audio_handler_->GetDeviceFromId(kJabraMic1.id)->display_name;
   expectation[kJabraMic2.id] =
       cras_audio_handler_->GetDeviceFromId(kJabraMic2.id)->display_name;
   expectation[kUSBCameraMic.id] =
       cras_audio_handler_->GetDeviceFromId(kUSBCameraMic.id)->display_name;
 
   DVLOG(2) << "Testing AudioManagerCras.";
   CreateAudioManagerForTesting<AudioManagerCras>();
-  AudioDeviceNames device_names;
-  audio_manager_->GetAudioInputDeviceNames(&device_names);
-  CheckDeviceNamesCras(device_names, expectation);
+  AudioDeviceDescriptions device_descriptions;
+  audio_manager_->GetAudioInputDeviceDescriptions(&device_descriptions);
+  CheckDeviceDescriptionsCras(device_descriptions, expectation);
 }
 
 // TODO(warx): enable the test once crbug.com/554168 is fixed.
 TEST_F(AudioManagerTest, DISABLED_EnumerateOutputDevicesCras) {
   // Setup the devices without internal mic, so that it doesn't exist
   // beamforming capable mic.
   AudioNodeList audio_nodes;
   audio_nodes.push_back(kJabraMic1);
   audio_nodes.push_back(kJabraMic2);
   audio_nodes.push_back(kUSBCameraMic);
   audio_nodes.push_back(kHDMIOutput);
   audio_nodes.push_back(kJabraSpeaker1);
   SetUpCrasAudioHandlerWithTestingNodes(audio_nodes);
 
   ABORT_AUDIO_TEST_IF_NOT(OutputDevicesAvailable());
 
   // Setup expectation with physical devices.
   std::map<uint64_t, std::string> expectation;
   expectation[kHDMIOutput.id] =
       cras_audio_handler_->GetDeviceFromId(kHDMIOutput.id)->display_name;
   expectation[kJabraSpeaker1.id] =
       cras_audio_handler_->GetDeviceFromId(kJabraSpeaker1.id)->display_name;
 
   DVLOG(2) << "Testing AudioManagerCras.";
   CreateAudioManagerForTesting<AudioManagerCras>();
-  AudioDeviceNames device_names;
-  audio_manager_->GetAudioOutputDeviceNames(&device_names);
-  CheckDeviceNamesCras(device_names, expectation);
+  AudioDeviceDescriptions device_descriptions;
+  audio_manager_->GetAudioOutputDeviceDescriptions(&device_descriptions);
+  CheckDeviceDescriptionsCras(device_descriptions, expectation);
 }
 #else  // !defined(USE_CRAS)
 
 TEST_F(AudioManagerTest, HandleDefaultDeviceIDs) {
   // Use a fake manager so we can makeup device ids, this will still use the
   // AudioManagerBase code.
   CreateAudioManagerForTesting<FakeAudioManager>();
   HandleDefaultDeviceIDsTest();
   base::RunLoop().RunUntilIdle();
 }
 
 // Test that devices can be enumerated.
 TEST_F(AudioManagerTest, EnumerateInputDevices) {
   ABORT_AUDIO_TEST_IF_NOT(InputDevicesAvailable());
 
-  AudioDeviceNames device_names;
-  audio_manager_->GetAudioInputDeviceNames(&device_names);
-  CheckDeviceNames(device_names);
+  AudioDeviceDescriptions device_descriptions;
+  audio_manager_->GetAudioInputDeviceDescriptions(&device_descriptions);
+  CheckDeviceDescriptions(device_descriptions);
 }
 
 // Test that devices can be enumerated.
 TEST_F(AudioManagerTest, EnumerateOutputDevices) {
   ABORT_AUDIO_TEST_IF_NOT(OutputDevicesAvailable());
 
-  AudioDeviceNames device_names;
-  audio_manager_->GetAudioOutputDeviceNames(&device_names);
-  CheckDeviceNames(device_names);
+  AudioDeviceDescriptions device_descriptions;
+  audio_manager_->GetAudioOutputDeviceDescriptions(&device_descriptions);
+  CheckDeviceDescriptions(device_descriptions);
 }
 
 // Run additional tests for Windows since enumeration can be done using
 // two different APIs. MMDevice is default for Vista and higher and Wave
 // is default for XP and lower.
 #if defined(OS_WIN)
 
 // Override default enumeration API and force usage of Windows MMDevice.
 // This test will only run on Windows Vista and higher.
 TEST_F(AudioManagerTest, EnumerateInputDevicesWinMMDevice) {
   ABORT_AUDIO_TEST_IF_NOT(InputDevicesAvailable());
 
-  AudioDeviceNames device_names;
+  AudioDeviceDescriptions device_descriptions;
   if (!SetMMDeviceEnumeration()) {
     // Usage of MMDevice will fail on XP and lower.
     LOG(WARNING) << "MM device enumeration is not supported.";
     return;
   }
-  audio_manager_->GetAudioInputDeviceNames(&device_names);
-  CheckDeviceNames(device_names);
+  audio_manager_->GetAudioInputDeviceDescriptions(&device_descriptions);
+  CheckDeviceDescriptions(device_descriptions);
 }
 
 TEST_F(AudioManagerTest, EnumerateOutputDevicesWinMMDevice) {
   ABORT_AUDIO_TEST_IF_NOT(OutputDevicesAvailable());
 
-  AudioDeviceNames device_names;
+  AudioDeviceDescriptions device_descriptions;
   if (!SetMMDeviceEnumeration()) {
     // Usage of MMDevice will fail on XP and lower.
     LOG(WARNING) << "MM device enumeration is not supported.";
     return;
   }
-  audio_manager_->GetAudioOutputDeviceNames(&device_names);
-  CheckDeviceNames(device_names);
+  audio_manager_->GetAudioOutputDeviceDescriptions(&device_descriptions);
+  CheckDeviceDescriptions(device_descriptions);
 }
 
 // Override default enumeration API and force usage of Windows Wave.
 // This test will run on Windows XP, Windows Vista and Windows 7.
 TEST_F(AudioManagerTest, EnumerateInputDevicesWinWave) {
   ABORT_AUDIO_TEST_IF_NOT(InputDevicesAvailable());
 
-  AudioDeviceNames device_names;
+  AudioDeviceDescriptions device_descriptions;
   SetWaveEnumeration();
-  audio_manager_->GetAudioInputDeviceNames(&device_names);
-  CheckDeviceNames(device_names);
+  audio_manager_->GetAudioInputDeviceDescriptions(&device_descriptions);
+  CheckDeviceDescriptions(device_descriptions);
 }
 
 TEST_F(AudioManagerTest, EnumerateOutputDevicesWinWave) {
   ABORT_AUDIO_TEST_IF_NOT(OutputDevicesAvailable());
 
-  AudioDeviceNames device_names;
+  AudioDeviceDescriptions device_descriptions;
   SetWaveEnumeration();
-  audio_manager_->GetAudioOutputDeviceNames(&device_names);
-  CheckDeviceNames(device_names);
+  audio_manager_->GetAudioOutputDeviceDescriptions(&device_descriptions);
+  CheckDeviceDescriptions(device_descriptions);
 }
 
 TEST_F(AudioManagerTest, WinXPDeviceIdUnchanged) {
   ABORT_AUDIO_TEST_IF_NOT(InputDevicesAvailable());
 
-  AudioDeviceNames xp_device_names;
+  AudioDeviceDescriptions xp_device_descriptions;
   SetWaveEnumeration();
-  audio_manager_->GetAudioInputDeviceNames(&xp_device_names);
-  CheckDeviceNames(xp_device_names);
+  audio_manager_->GetAudioInputDeviceDescriptions(&xp_device_descriptions);
+  CheckDeviceDescriptions(xp_device_descriptions);
 
   // Device ID should remain unchanged, including the default device ID.
-  for (AudioDeviceNames::iterator i = xp_device_names.begin();
-       i != xp_device_names.end(); ++i) {
+  for (AudioDeviceDescriptions::iterator i = xp_device_descriptions.begin();

[Guido Urdaneta, 2016/12/08 15:53:37]

nit: consider switching to range for.

[o1ka, 2016/12/09 14:56:30]

Done.

+       i != xp_device_descriptions.end(); ++i) {
     EXPECT_EQ(i->unique_id,
               GetDeviceIdFromPCMWaveInAudioInputStream(i->unique_id));
   }
 }
 
 TEST_F(AudioManagerTest, ConvertToWinXPInputDeviceId) {
   ABORT_AUDIO_TEST_IF_NOT(InputDevicesAvailable());
 
   if (!SetMMDeviceEnumeration()) {
     // Usage of MMDevice will fail on XP and lower.
     LOG(WARNING) << "MM device enumeration is not supported.";
     return;
   }
 
-  AudioDeviceNames device_names;
-  audio_manager_->GetAudioInputDeviceNames(&device_names);
-  CheckDeviceNames(device_names);
+  AudioDeviceDescriptions device_descriptions;
+  audio_manager_->GetAudioInputDeviceDescriptions(&device_descriptions);
+  CheckDeviceDescriptions(device_descriptions);
 
-  for (AudioDeviceNames::iterator i = device_names.begin();
-       i != device_names.end(); ++i) {
+  for (AudioDeviceDescriptions::iterator i = device_descriptions.begin();
+       i != device_descriptions.end(); ++i) {
     std::string converted_id =
         GetDeviceIdFromPCMWaveInAudioInputStream(i->unique_id);
-    if (i == device_names.begin()) {
+    if (i == device_descriptions.begin()) {
       // The first in the list is the default device ID, which should not be
       // changed when passed to PCMWaveInAudioInputStream.
       EXPECT_EQ(i->unique_id, converted_id);
     } else {
       // MMDevice-style device IDs should be converted to WaveIn-style device
       // IDs.
       EXPECT_NE(i->unique_id, converted_id);
     }
   }
 }
 
 #endif  // defined(OS_WIN)
 
 #if defined(USE_PULSEAUDIO)
 // On Linux, there are two implementations available and both can
 // sometimes be tested on a single system. These tests specifically
 // test Pulseaudio.
 
 TEST_F(AudioManagerTest, EnumerateInputDevicesPulseaudio) {
   ABORT_AUDIO_TEST_IF_NOT(InputDevicesAvailable());
 
   CreateAudioManagerForTesting<AudioManagerPulse>();
   if (audio_manager_.get()) {
-    AudioDeviceNames device_names;
-    audio_manager_->GetAudioInputDeviceNames(&device_names);
-    CheckDeviceNames(device_names);
+    AudioDeviceDescriptions device_descriptions;
+    audio_manager_->GetAudioInputDeviceDescriptions(&device_descriptions);
+    CheckDeviceDescriptions(device_descriptions);
   } else {
     LOG(WARNING) << "No pulseaudio on this system.";
   }
 }
 
 TEST_F(AudioManagerTest, EnumerateOutputDevicesPulseaudio) {
   ABORT_AUDIO_TEST_IF_NOT(OutputDevicesAvailable());
 
   CreateAudioManagerForTesting<AudioManagerPulse>();
   if (audio_manager_.get()) {
-    AudioDeviceNames device_names;
-    audio_manager_->GetAudioOutputDeviceNames(&device_names);
-    CheckDeviceNames(device_names);
+    AudioDeviceDescriptions device_descriptions;
+    audio_manager_->GetAudioOutputDeviceDescriptions(&device_descriptions);
+    CheckDeviceDescriptions(device_descriptions);
   } else {
     LOG(WARNING) << "No pulseaudio on this system.";
   }
 }
 #endif  // defined(USE_PULSEAUDIO)
 
 #if defined(USE_ALSA)
 // On Linux, there are two implementations available and both can
 // sometimes be tested on a single system. These tests specifically
 // test Alsa.
 
 TEST_F(AudioManagerTest, EnumerateInputDevicesAlsa) {
   ABORT_AUDIO_TEST_IF_NOT(InputDevicesAvailable());
 
   DVLOG(2) << "Testing AudioManagerAlsa.";
   CreateAudioManagerForTesting<AudioManagerAlsa>();
-  AudioDeviceNames device_names;
-  audio_manager_->GetAudioInputDeviceNames(&device_names);
-  CheckDeviceNames(device_names);
+  AudioDeviceDescriptions device_descriptions;
+  audio_manager_->GetAudioInputDeviceDescriptions(&device_descriptions);
+  CheckDeviceDescriptions(device_descriptions);
 }
 
 TEST_F(AudioManagerTest, EnumerateOutputDevicesAlsa) {
   ABORT_AUDIO_TEST_IF_NOT(OutputDevicesAvailable());
 
   DVLOG(2) << "Testing AudioManagerAlsa.";
   CreateAudioManagerForTesting<AudioManagerAlsa>();
-  AudioDeviceNames device_names;
-  audio_manager_->GetAudioOutputDeviceNames(&device_names);
-  CheckDeviceNames(device_names);
+  AudioDeviceDescriptions device_descriptions;
+  audio_manager_->GetAudioOutputDeviceDescriptions(&device_descriptions);
+  CheckDeviceDescriptions(device_descriptions);
 }
 #endif  // defined(USE_ALSA)
 
 TEST_F(AudioManagerTest, GetDefaultOutputStreamParameters) {
 #if defined(OS_WIN) || defined(OS_MACOSX)
   ABORT_AUDIO_TEST_IF_NOT(InputDevicesAvailable());
 
   AudioParameters params;
   GetDefaultOutputStreamParameters(&params);
   EXPECT_TRUE(params.IsValid());
 #endif  // defined(OS_WIN) || defined(OS_MACOSX)
 }
 
 TEST_F(AudioManagerTest, GetAssociatedOutputDeviceID) {
 #if defined(OS_WIN) || defined(OS_MACOSX)
   ABORT_AUDIO_TEST_IF_NOT(InputDevicesAvailable() && OutputDevicesAvailable());
 
-  AudioDeviceNames device_names;
-  audio_manager_->GetAudioInputDeviceNames(&device_names);
+  AudioDeviceDescriptions device_descriptions;
+  audio_manager_->GetAudioInputDeviceDescriptions(&device_descriptions);
   bool found_an_associated_device = false;
-  for (AudioDeviceNames::iterator it = device_names.begin();
-       it != device_names.end();
-       ++it) {
+  for (AudioDeviceDescriptions::iterator it = device_descriptions.begin();

[Guido Urdaneta, 2016/12/08 15:53:37]

nit: consider switching to range for

[o1ka, 2016/12/09 14:56:30]

Done.

+       it != device_descriptions.end(); ++it) {
     EXPECT_FALSE(it->unique_id.empty());
     EXPECT_FALSE(it->device_name.empty());
     std::string output_device_id;
     GetAssociatedOutputDeviceID(it->unique_id, &output_device_id);
     if (!output_device_id.empty()) {
       DVLOG(2) << it->unique_id << " matches with " << output_device_id;
       found_an_associated_device = true;
     }
   }
 
   EXPECT_TRUE(found_an_associated_device);
 #endif  // defined(OS_WIN) || defined(OS_MACOSX)
 }
 #endif  // defined(USE_CRAS)
 
 class TestAudioManager : public FakeAudioManager {
   // For testing the default implementation of GetGroupId(Input|Output)
   // input$i is associated to output$i, if both exist.
   // Default input is input1.
   // Default output is output2.
  public:
   TestAudioManager(
       scoped_refptr<base::SingleThreadTaskRunner> task_runner,
       scoped_refptr<base::SingleThreadTaskRunner> worker_task_runner,
       AudioLogFactory* audio_log_factory)
       : FakeAudioManager(task_runner, worker_task_runner, audio_log_factory) {}
 
+  std::string GetDefaultOutputDeviceID() override { return "output4"; }
+
+  std::string GetAssociatedOutputDeviceID(
+      const std::string& input_id) override {
+    if (input_id == "input1")
+      return "output1";
+    if (input_id == "input2")
+      return "output2";
+    if (input_id == "default")
+      return "output1";
+    return "";
+  }
+
+ private:
   void GetAudioInputDeviceNames(AudioDeviceNames* device_names) override {
     device_names->emplace_back("Input 1", "input1");
     device_names->emplace_back("Input 2", "input2");
     device_names->emplace_back("Input 3", "input3");
     device_names->push_front(AudioDeviceName::CreateDefault());
   }
 
   void GetAudioOutputDeviceNames(AudioDeviceNames* device_names) override {
     device_names->emplace_back("Output 1", "output1");
     device_names->emplace_back("Output 2", "output2");
+    device_names->emplace_back("Output 3", "output3");
     device_names->emplace_back("Output 4", "output4");
     device_names->push_front(AudioDeviceName::CreateDefault());
   }
-
-  std::string GetDefaultOutputDeviceID() override { return "output4"; }
-
-  std::string GetAssociatedOutputDeviceID(
-      const std::string& input_id) override {
-    if (input_id == "input1")
-      return "output1";
-    if (input_id == "input2")
-      return "output2";
-    if (input_id == "default")
-      return "output1";
-    return "";
-  }
 };
 
-TEST_F(AudioManagerTest, GetGroupId) {
+TEST_F(AudioManagerTest, GroupId) {
   CreateAudioManagerForTesting<TestAudioManager>();
   // Groups:
-  // 0: input1, output1, default input
-  // 1: input2, output2
-  // 2: input3,
-  // 3: output4, default output
-  std::vector<std::string> group;
-  group.push_back(audio_manager_->GetGroupIDInput("input1"));
-  group.push_back(audio_manager_->GetGroupIDInput("input2"));
-  group.push_back(audio_manager_->GetGroupIDInput("input3"));
-  group.push_back(audio_manager_->GetGroupIDOutput("output4"));
-  for (size_t i = 0; i < group.size(); ++i) {
-    for (size_t j = i + 1; j < group.size(); ++j) {
-      EXPECT_NE(group[i], group[j]);
-    }
-  }
-  EXPECT_EQ(group[0], audio_manager_->GetGroupIDOutput("output1"));
-  EXPECT_EQ(group[0], audio_manager_->GetGroupIDInput("default"));
-  EXPECT_EQ(group[1], audio_manager_->GetGroupIDOutput("output2"));
-  EXPECT_EQ(group[3], audio_manager_->GetGroupIDOutput("default"));
+  // input1, output1, default input
+  // input2, output2
+  // input3,
+  // output3
+  // output4, default output
+  AudioDeviceDescriptions input_descriptions;
+  audio_manager_->GetAudioInputDeviceDescriptions(&input_descriptions);
+  std::vector<AudioDeviceDescription> inputs(input_descriptions.begin(),
+                                             input_descriptions.end());
+  AudioDeviceDescriptions output_descriptions;
+  audio_manager_->GetAudioOutputDeviceDescriptions(&output_descriptions);
+  std::vector<AudioDeviceDescription> outputs(output_descriptions.begin(),
+                                              output_descriptions.end());
+
+  EXPECT_EQ(inputs[0].group_id, outputs[1].group_id);
+  EXPECT_EQ(inputs[1].group_id, outputs[1].group_id);
+  EXPECT_EQ(inputs[2].group_id, outputs[2].group_id);
+  EXPECT_NE(inputs[3].group_id, outputs[3].group_id);
+  EXPECT_EQ(outputs[4].group_id, outputs[0].group_id);
+  EXPECT_NE(inputs[0].group_id, outputs[0].group_id);
+  EXPECT_NE(inputs[1].group_id, outputs[2].group_id);
+  EXPECT_NE(inputs[2].group_id, outputs[3].group_id);
+  EXPECT_NE(inputs[1].group_id, outputs[3].group_id);
 }
 
 }  // namespace media