Adding debug dump test.

This test is to verify that the debug dump can perfectly reproduce APM states if the recording is made from the first input sample.

BUG=

Review URL: https://codereview.webrtc.org/1393353003

Cr-Commit-Position: refs/heads/master@{#10506}
diff --git a/webrtc/modules/audio_processing/test/debug_dump_test.cc b/webrtc/modules/audio_processing/test/debug_dump_test.cc
new file mode 100644
index 0000000..d2dd9c8
--- /dev/null
+++ b/webrtc/modules/audio_processing/test/debug_dump_test.cc
@@ -0,0 +1,609 @@
+/*
+ *  Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include <stddef.h>  // size_t
+#include <string>
+#include <vector>
+
+#include "testing/gtest/include/gtest/gtest.h"
+#include "webrtc/audio_processing/debug.pb.h"
+#include "webrtc/base/checks.h"
+#include "webrtc/base/scoped_ptr.h"
+#include "webrtc/common_audio/channel_buffer.h"
+#include "webrtc/modules/audio_coding/neteq/tools/resample_input_audio_file.h"
+#include "webrtc/modules/audio_processing/include/audio_processing.h"
+#include "webrtc/modules/audio_processing/test/protobuf_utils.h"
+#include "webrtc/modules/audio_processing/test/test_utils.h"
+#include "webrtc/test/testsupport/fileutils.h"
+
+namespace webrtc {
+namespace test {
+
+namespace {
+
+void MaybeResetBuffer(rtc::scoped_ptr<ChannelBuffer<float>>* buffer,
+                      const StreamConfig& config) {
+  auto& buffer_ref = *buffer;
+  if (!buffer_ref.get() || buffer_ref->num_frames() != config.num_frames() ||
+      buffer_ref->num_channels() != config.num_channels()) {
+    buffer_ref.reset(new ChannelBuffer<float>(config.num_frames(),
+                                             config.num_channels()));
+  }
+}
+
+class DebugDumpGenerator {
+ public:
+  DebugDumpGenerator(const std::string& input_file_name,
+                     int input_file_rate_hz,
+                     int input_channels,
+                     const std::string& reverse_file_name,
+                     int reverse_file_rate_hz,
+                     int reverse_channels,
+                     const Config& config,
+                     const std::string& dump_file_name);
+
+  // Constructor that uses default input files.
+  explicit DebugDumpGenerator(const Config& config);
+
+  ~DebugDumpGenerator();
+
+  // Changes the sample rate of the input audio to the APM.
+  void SetInputRate(int rate_hz);
+
+  // Sets if converts stereo input signal to mono by discarding other channels.
+  void ForceInputMono(bool mono);
+
+  // Changes the sample rate of the reverse audio to the APM.
+  void SetReverseRate(int rate_hz);
+
+  // Sets if converts stereo reverse signal to mono by discarding other
+  // channels.
+  void ForceReverseMono(bool mono);
+
+  // Sets the required sample rate of the APM output.
+  void SetOutputRate(int rate_hz);
+
+  // Sets the required channels of the APM output.
+  void SetOutputChannels(int channels);
+
+  std::string dump_file_name() const { return dump_file_name_; }
+
+  void StartRecording();
+  void Process(size_t num_blocks);
+  void StopRecording();
+  AudioProcessing* apm() const { return apm_.get(); }
+
+ private:
+  static void ReadAndDeinterleave(ResampleInputAudioFile* audio, int channels,
+                                  const StreamConfig& config,
+                                  float* const* buffer);
+
+  // APM input/output settings.
+  StreamConfig input_config_;
+  StreamConfig reverse_config_;
+  StreamConfig output_config_;
+
+  // Input file format.
+  const std::string input_file_name_;
+  ResampleInputAudioFile input_audio_;
+  const int input_file_channels_;
+
+  // Reverse file format.
+  const std::string reverse_file_name_;
+  ResampleInputAudioFile reverse_audio_;
+  const int reverse_file_channels_;
+
+  // Buffer for APM input/output.
+  rtc::scoped_ptr<ChannelBuffer<float>> input_;
+  rtc::scoped_ptr<ChannelBuffer<float>> reverse_;
+  rtc::scoped_ptr<ChannelBuffer<float>> output_;
+
+  rtc::scoped_ptr<AudioProcessing> apm_;
+
+  const std::string dump_file_name_;
+};
+
+DebugDumpGenerator::DebugDumpGenerator(const std::string& input_file_name,
+                                       int input_rate_hz,
+                                       int input_channels,
+                                       const std::string& reverse_file_name,
+                                       int reverse_rate_hz,
+                                       int reverse_channels,
+                                       const Config& config,
+                                       const std::string& dump_file_name)
+    : input_config_(input_rate_hz, input_channels),
+      reverse_config_(reverse_rate_hz, reverse_channels),
+      output_config_(input_rate_hz, input_channels),
+      input_audio_(input_file_name, input_rate_hz, input_rate_hz),
+      input_file_channels_(input_channels),
+      reverse_audio_(reverse_file_name, reverse_rate_hz, reverse_rate_hz),
+      reverse_file_channels_(reverse_channels),
+      input_(new ChannelBuffer<float>(input_config_.num_frames(),
+                                      input_config_.num_channels())),
+      reverse_(new ChannelBuffer<float>(reverse_config_.num_frames(),
+                                        reverse_config_.num_channels())),
+      output_(new ChannelBuffer<float>(output_config_.num_frames(),
+                                       output_config_.num_channels())),
+      apm_(AudioProcessing::Create(config)),
+      dump_file_name_(dump_file_name) {
+}
+
+DebugDumpGenerator::DebugDumpGenerator(const Config& config)
+  : DebugDumpGenerator(ResourcePath("near32_stereo", "pcm"), 32000, 2,
+                       ResourcePath("far32_stereo", "pcm"), 32000, 2,
+                       config,
+                       TempFilename(OutputPath(), "debug_aec")) {
+}
+
+DebugDumpGenerator::~DebugDumpGenerator() {
+  remove(dump_file_name_.c_str());
+}
+
+void DebugDumpGenerator::SetInputRate(int rate_hz) {
+  input_audio_.set_output_rate_hz(rate_hz);
+  input_config_.set_sample_rate_hz(rate_hz);
+  MaybeResetBuffer(&input_, input_config_);
+}
+
+void DebugDumpGenerator::ForceInputMono(bool mono) {
+  const int channels = mono ? 1 : input_file_channels_;
+  input_config_.set_num_channels(channels);
+  MaybeResetBuffer(&input_, input_config_);
+}
+
+void DebugDumpGenerator::SetReverseRate(int rate_hz) {
+  reverse_audio_.set_output_rate_hz(rate_hz);
+  reverse_config_.set_sample_rate_hz(rate_hz);
+  MaybeResetBuffer(&reverse_, reverse_config_);
+}
+
+void DebugDumpGenerator::ForceReverseMono(bool mono) {
+  const int channels = mono ? 1 : reverse_file_channels_;
+  reverse_config_.set_num_channels(channels);
+  MaybeResetBuffer(&reverse_, reverse_config_);
+}
+
+void DebugDumpGenerator::SetOutputRate(int rate_hz) {
+  output_config_.set_sample_rate_hz(rate_hz);
+  MaybeResetBuffer(&output_, output_config_);
+}
+
+void DebugDumpGenerator::SetOutputChannels(int channels) {
+  output_config_.set_num_channels(channels);
+  MaybeResetBuffer(&output_, output_config_);
+}
+
+void DebugDumpGenerator::StartRecording() {
+  apm_->StartDebugRecording(dump_file_name_.c_str());
+}
+
+void DebugDumpGenerator::Process(size_t num_blocks) {
+  for (size_t i = 0; i < num_blocks; ++i) {
+    ReadAndDeinterleave(&reverse_audio_, reverse_file_channels_,
+                        reverse_config_, reverse_->channels());
+    ReadAndDeinterleave(&input_audio_, input_file_channels_, input_config_,
+                        input_->channels());
+    RTC_CHECK_EQ(AudioProcessing::kNoError, apm_->set_stream_delay_ms(100));
+    apm_->set_stream_key_pressed(i % 10 == 9);
+    RTC_CHECK_EQ(AudioProcessing::kNoError,
+                 apm_->ProcessStream(input_->channels(), input_config_,
+                                     output_config_, output_->channels()));
+
+    RTC_CHECK_EQ(AudioProcessing::kNoError,
+                 apm_->ProcessReverseStream(reverse_->channels(),
+                                            reverse_config_,
+                                            reverse_config_,
+                                            reverse_->channels()));
+  }
+}
+
+void DebugDumpGenerator::StopRecording() {
+  apm_->StopDebugRecording();
+}
+
+void DebugDumpGenerator::ReadAndDeinterleave(ResampleInputAudioFile* audio,
+                                             int channels,
+                                             const StreamConfig& config,
+                                             float* const* buffer) {
+  const size_t num_frames = config.num_frames();
+  const int out_channels = config.num_channels();
+
+  std::vector<int16_t> signal(channels * num_frames);
+
+  audio->Read(num_frames * channels, &signal[0]);
+
+  // We only allow reducing number of channels by discarding some channels.
+  RTC_CHECK_LE(out_channels, channels);
+  for (int channel = 0; channel < out_channels; ++channel) {
+    for (size_t i = 0; i < num_frames; ++i) {
+      buffer[channel][i] = S16ToFloat(signal[i * channels + channel]);
+    }
+  }
+}
+
+}  // namespace
+
+class DebugDumpTest : public ::testing::Test {
+ public:
+  DebugDumpTest();
+
+  // VerifyDebugDump replays a debug dump using APM and verifies that the result
+  // is bit-exact-identical to the output channel in the dump. This is only
+  // guaranteed if the debug dump is started on the first frame.
+  void VerifyDebugDump(const std::string& dump_file_name);
+
+ private:
+  // Following functions are facilities for replaying debug dumps.
+  void OnInitEvent(const audioproc::Init& msg);
+  void OnStreamEvent(const audioproc::Stream& msg);
+  void OnReverseStreamEvent(const audioproc::ReverseStream& msg);
+  void OnConfigEvent(const audioproc::Config& msg);
+
+  void MaybeRecreateApm(const audioproc::Config& msg);
+  void ConfigureApm(const audioproc::Config& msg);
+
+  // Buffer for APM input/output.
+  rtc::scoped_ptr<ChannelBuffer<float>> input_;
+  rtc::scoped_ptr<ChannelBuffer<float>> reverse_;
+  rtc::scoped_ptr<ChannelBuffer<float>> output_;
+
+  rtc::scoped_ptr<AudioProcessing> apm_;
+
+  StreamConfig input_config_;
+  StreamConfig reverse_config_;
+  StreamConfig output_config_;
+};
+
+DebugDumpTest::DebugDumpTest()
+    : input_(nullptr),  // will be created upon usage.
+      reverse_(nullptr),
+      output_(nullptr),
+      apm_(nullptr) {
+}
+
+void DebugDumpTest::VerifyDebugDump(const std::string& in_filename) {
+  FILE* in_file = fopen(in_filename.c_str(), "rb");
+  ASSERT_TRUE(in_file);
+  audioproc::Event event_msg;
+
+  while (ReadMessageFromFile(in_file, &event_msg)) {
+    switch (event_msg.type()) {
+      case audioproc::Event::INIT:
+        OnInitEvent(event_msg.init());
+        break;
+      case audioproc::Event::STREAM:
+        OnStreamEvent(event_msg.stream());
+        break;
+      case audioproc::Event::REVERSE_STREAM:
+        OnReverseStreamEvent(event_msg.reverse_stream());
+        break;
+      case audioproc::Event::CONFIG:
+        OnConfigEvent(event_msg.config());
+        break;
+      case audioproc::Event::UNKNOWN_EVENT:
+        // We do not expect receive UNKNOWN event currently.
+        FAIL();
+    }
+  }
+  fclose(in_file);
+}
+
+// OnInitEvent reset the input/output/reserve channel format.
+void DebugDumpTest::OnInitEvent(const audioproc::Init& msg) {
+  ASSERT_TRUE(msg.has_num_input_channels());
+  ASSERT_TRUE(msg.has_output_sample_rate());
+  ASSERT_TRUE(msg.has_num_output_channels());
+  ASSERT_TRUE(msg.has_reverse_sample_rate());
+  ASSERT_TRUE(msg.has_num_reverse_channels());
+
+  input_config_ = StreamConfig(msg.sample_rate(), msg.num_input_channels());
+  output_config_ =
+      StreamConfig(msg.output_sample_rate(), msg.num_output_channels());
+  reverse_config_ =
+      StreamConfig(msg.reverse_sample_rate(), msg.num_reverse_channels());
+
+  MaybeResetBuffer(&input_, input_config_);
+  MaybeResetBuffer(&output_, output_config_);
+  MaybeResetBuffer(&reverse_, reverse_config_);
+}
+
+// OnStreamEvent replays an input signal and verifies the output.
+void DebugDumpTest::OnStreamEvent(const audioproc::Stream& msg) {
+  // APM should have been created.
+  ASSERT_TRUE(apm_.get());
+
+  EXPECT_NOERR(apm_->gain_control()->set_stream_analog_level(msg.level()));
+  EXPECT_NOERR(apm_->set_stream_delay_ms(msg.delay()));
+  apm_->echo_cancellation()->set_stream_drift_samples(msg.drift());
+  if (msg.has_keypress())
+    apm_->set_stream_key_pressed(msg.keypress());
+  else
+    apm_->set_stream_key_pressed(true);
+
+  ASSERT_EQ(input_config_.num_channels(), msg.input_channel_size());
+  ASSERT_EQ(input_config_.num_frames() * sizeof(float),
+            msg.input_channel(0).size());
+
+  for (int i = 0; i < msg.input_channel_size(); ++i) {
+     memcpy(input_->channels()[i], msg.input_channel(i).data(),
+            msg.input_channel(i).size());
+  }
+
+  ASSERT_EQ(AudioProcessing::kNoError,
+            apm_->ProcessStream(input_->channels(), input_config_,
+                                output_config_, output_->channels()));
+
+  // Check that output of APM is bit-exact to the output in the dump.
+  ASSERT_EQ(output_config_.num_channels(), msg.output_channel_size());
+  ASSERT_EQ(output_config_.num_frames() * sizeof(float),
+            msg.output_channel(0).size());
+  for (int i = 0; i < msg.output_channel_size(); ++i) {
+    ASSERT_EQ(0, memcmp(output_->channels()[i], msg.output_channel(i).data(),
+                        msg.output_channel(i).size()));
+  }
+}
+
+void DebugDumpTest::OnReverseStreamEvent(const audioproc::ReverseStream& msg) {
+  // APM should have been created.
+  ASSERT_TRUE(apm_.get());
+
+  ASSERT_GT(msg.channel_size(), 0);
+  ASSERT_EQ(reverse_config_.num_channels(), msg.channel_size());
+  ASSERT_EQ(reverse_config_.num_frames() * sizeof(float),
+            msg.channel(0).size());
+
+  for (int i = 0; i < msg.channel_size(); ++i) {
+     memcpy(reverse_->channels()[i], msg.channel(i).data(),
+            msg.channel(i).size());
+  }
+
+  ASSERT_EQ(AudioProcessing::kNoError,
+            apm_->ProcessReverseStream(reverse_->channels(),
+                                       reverse_config_,
+                                       reverse_config_,
+                                       reverse_->channels()));
+}
+
+void DebugDumpTest::OnConfigEvent(const audioproc::Config& msg) {
+  MaybeRecreateApm(msg);
+  ConfigureApm(msg);
+}
+
+void DebugDumpTest::MaybeRecreateApm(const audioproc::Config& msg) {
+  // These configurations cannot be changed on the fly.
+  Config config;
+  ASSERT_TRUE(msg.has_aec_delay_agnostic_enabled());
+  config.Set<DelayAgnostic>(
+      new DelayAgnostic(msg.aec_delay_agnostic_enabled()));
+
+  ASSERT_TRUE(msg.has_noise_robust_agc_enabled());
+  config.Set<ExperimentalAgc>(
+       new ExperimentalAgc(msg.noise_robust_agc_enabled()));
+
+  ASSERT_TRUE(msg.has_transient_suppression_enabled());
+  config.Set<ExperimentalNs>(
+      new ExperimentalNs(msg.transient_suppression_enabled()));
+
+  ASSERT_TRUE(msg.has_aec_extended_filter_enabled());
+  config.Set<ExtendedFilter>(new ExtendedFilter(
+      msg.aec_extended_filter_enabled()));
+
+  // We only create APM once, since changes on these fields should not
+  // happen in current implementation.
+  if (!apm_.get()) {
+    apm_.reset(AudioProcessing::Create(config));
+  }
+}
+
+void DebugDumpTest::ConfigureApm(const audioproc::Config& msg) {
+  // AEC configs.
+  ASSERT_TRUE(msg.has_aec_enabled());
+  EXPECT_EQ(AudioProcessing::kNoError,
+            apm_->echo_cancellation()->Enable(msg.aec_enabled()));
+
+  ASSERT_TRUE(msg.has_aec_drift_compensation_enabled());
+  EXPECT_EQ(AudioProcessing::kNoError,
+            apm_->echo_cancellation()->enable_drift_compensation(
+                msg.aec_drift_compensation_enabled()));
+
+  ASSERT_TRUE(msg.has_aec_suppression_level());
+  EXPECT_EQ(AudioProcessing::kNoError,
+            apm_->echo_cancellation()->set_suppression_level(
+                static_cast<EchoCancellation::SuppressionLevel>(
+                    msg.aec_suppression_level())));
+
+  // AECM configs.
+  ASSERT_TRUE(msg.has_aecm_enabled());
+  EXPECT_EQ(AudioProcessing::kNoError,
+            apm_->echo_control_mobile()->Enable(msg.aecm_enabled()));
+
+  ASSERT_TRUE(msg.has_aecm_comfort_noise_enabled());
+  EXPECT_EQ(AudioProcessing::kNoError,
+            apm_->echo_control_mobile()->enable_comfort_noise(
+                msg.aecm_comfort_noise_enabled()));
+
+  ASSERT_TRUE(msg.has_aecm_routing_mode());
+  EXPECT_EQ(AudioProcessing::kNoError,
+            apm_->echo_control_mobile()->set_routing_mode(
+                static_cast<EchoControlMobile::RoutingMode>(
+                    msg.aecm_routing_mode())));
+
+  // AGC configs.
+  ASSERT_TRUE(msg.has_agc_enabled());
+  EXPECT_EQ(AudioProcessing::kNoError,
+            apm_->gain_control()->Enable(msg.agc_enabled()));
+
+  ASSERT_TRUE(msg.has_agc_mode());
+  EXPECT_EQ(AudioProcessing::kNoError,
+            apm_->gain_control()->set_mode(
+                static_cast<GainControl::Mode>(msg.agc_mode())));
+
+  ASSERT_TRUE(msg.has_agc_limiter_enabled());
+  EXPECT_EQ(AudioProcessing::kNoError,
+            apm_->gain_control()->enable_limiter(msg.agc_limiter_enabled()));
+
+  // HPF configs.
+  ASSERT_TRUE(msg.has_hpf_enabled());
+  EXPECT_EQ(AudioProcessing::kNoError,
+            apm_->high_pass_filter()->Enable(msg.hpf_enabled()));
+
+  // NS configs.
+  ASSERT_TRUE(msg.has_ns_enabled());
+  EXPECT_EQ(AudioProcessing::kNoError,
+            apm_->noise_suppression()->Enable(msg.ns_enabled()));
+
+  ASSERT_TRUE(msg.has_ns_level());
+  EXPECT_EQ(AudioProcessing::kNoError,
+            apm_->noise_suppression()->set_level(
+                static_cast<NoiseSuppression::Level>(msg.ns_level())));
+}
+
+TEST_F(DebugDumpTest, SimpleCase) {
+  Config config;
+  DebugDumpGenerator generator(config);
+  generator.StartRecording();
+  generator.Process(100);
+  generator.StopRecording();
+  VerifyDebugDump(generator.dump_file_name());
+}
+
+TEST_F(DebugDumpTest, ChangeInputFormat) {
+  Config config;
+  DebugDumpGenerator generator(config);
+  generator.StartRecording();
+  generator.Process(100);
+  generator.SetInputRate(48000);
+
+  generator.ForceInputMono(true);
+  // Number of output channel should not be larger than that of input. APM will
+  // fail otherwise.
+  generator.SetOutputChannels(1);
+
+  generator.Process(100);
+  generator.StopRecording();
+  VerifyDebugDump(generator.dump_file_name());
+}
+
+TEST_F(DebugDumpTest, ChangeReverseFormat) {
+  Config config;
+  DebugDumpGenerator generator(config);
+  generator.StartRecording();
+  generator.Process(100);
+  generator.SetReverseRate(48000);
+  generator.ForceReverseMono(true);
+  generator.Process(100);
+  generator.StopRecording();
+  VerifyDebugDump(generator.dump_file_name());
+}
+
+TEST_F(DebugDumpTest, ChangeOutputFormat) {
+  Config config;
+  DebugDumpGenerator generator(config);
+  generator.StartRecording();
+  generator.Process(100);
+  generator.SetOutputRate(48000);
+  generator.SetOutputChannels(1);
+  generator.Process(100);
+  generator.StopRecording();
+  VerifyDebugDump(generator.dump_file_name());
+}
+
+TEST_F(DebugDumpTest, ToggleAec) {
+  Config config;
+  DebugDumpGenerator generator(config);
+  generator.StartRecording();
+  generator.Process(100);
+
+  EchoCancellation* aec = generator.apm()->echo_cancellation();
+  EXPECT_EQ(AudioProcessing::kNoError, aec->Enable(!aec->is_enabled()));
+
+  generator.Process(100);
+  generator.StopRecording();
+  VerifyDebugDump(generator.dump_file_name());
+}
+
+TEST_F(DebugDumpTest, ToggleDelayAgnosticAec) {
+  Config config;
+  config.Set<DelayAgnostic>(new DelayAgnostic(true));
+  DebugDumpGenerator generator(config);
+  generator.StartRecording();
+  generator.Process(100);
+
+  EchoCancellation* aec = generator.apm()->echo_cancellation();
+  EXPECT_EQ(AudioProcessing::kNoError, aec->Enable(!aec->is_enabled()));
+
+  generator.Process(100);
+  generator.StopRecording();
+  VerifyDebugDump(generator.dump_file_name());
+}
+
+TEST_F(DebugDumpTest, ToggleAecLevel) {
+  Config config;
+  DebugDumpGenerator generator(config);
+  EchoCancellation* aec = generator.apm()->echo_cancellation();
+  EXPECT_EQ(AudioProcessing::kNoError, aec->Enable(true));
+  EXPECT_EQ(AudioProcessing::kNoError,
+            aec->set_suppression_level(EchoCancellation::kLowSuppression));
+  generator.StartRecording();
+  generator.Process(100);
+
+  EXPECT_EQ(AudioProcessing::kNoError,
+            aec->set_suppression_level(EchoCancellation::kHighSuppression));
+  generator.Process(100);
+  generator.StopRecording();
+  VerifyDebugDump(generator.dump_file_name());
+}
+
+#if defined(WEBRTC_ANDROID)
+// AGC may not be supported on Android.
+#define MAYBE_ToggleAgc DISABLED_ToggleAgc
+#else
+#define MAYBE_ToggleAgc ToggleAgc
+#endif
+TEST_F(DebugDumpTest, MAYBE_ToggleAgc) {
+  Config config;
+  DebugDumpGenerator generator(config);
+  generator.StartRecording();
+  generator.Process(100);
+
+  GainControl* agc = generator.apm()->gain_control();
+  EXPECT_EQ(AudioProcessing::kNoError, agc->Enable(!agc->is_enabled()));
+
+  generator.Process(100);
+  generator.StopRecording();
+  VerifyDebugDump(generator.dump_file_name());
+}
+
+TEST_F(DebugDumpTest, ToggleNs) {
+  Config config;
+  DebugDumpGenerator generator(config);
+  generator.StartRecording();
+  generator.Process(100);
+
+  NoiseSuppression* ns = generator.apm()->noise_suppression();
+  EXPECT_EQ(AudioProcessing::kNoError, ns->Enable(!ns->is_enabled()));
+
+  generator.Process(100);
+  generator.StopRecording();
+  VerifyDebugDump(generator.dump_file_name());
+}
+
+TEST_F(DebugDumpTest, TransientSuppressionOn) {
+  Config config;
+  config.Set<ExperimentalNs>(new ExperimentalNs(true));
+  DebugDumpGenerator generator(config);
+  generator.StartRecording();
+  generator.Process(100);
+  generator.StopRecording();
+  VerifyDebugDump(generator.dump_file_name());
+}
+
+}  // namespace test
+}  // namespace webrtc
diff --git a/webrtc/modules/modules.gyp b/webrtc/modules/modules.gyp
index de00c95..748db11 100644
--- a/webrtc/modules/modules.gyp
+++ b/webrtc/modules/modules.gyp
@@ -338,6 +338,7 @@
               'sources': [
                 'audio_processing/audio_processing_impl_unittest.cc',
                 'audio_processing/test/audio_processing_unittest.cc',
+                'audio_processing/test/debug_dump_test.cc',
                 'audio_processing/test/test_utils.h',
               ],
             }],