content/browser/speech/speech_recognition_browsertest.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include <list>
   6
   7 #include "base/bind.h"
   8 #include "base/memory/scoped_ptr.h"
   9 #include "base/run_loop.h"
  10 #include "base/strings/utf_string_conversions.h"
  11 #include "content/browser/speech/google_streaming_remote_engine.h"
  12 #include "content/browser/speech/speech_recognition_manager_impl.h"
  13 #include "content/browser/speech/speech_recognizer_impl.h"
  14 #include "content/public/browser/browser_thread.h"
  15 #include "content/public/browser/notification_types.h"
  16 #include "content/public/browser/web_contents.h"
  17 #include "content/public/test/browser_test_utils.h"
  18 #include "content/public/test/test_utils.h"
  19 #include "content/shell/browser/shell.h"
  20 #include "content/test/content_browser_test.h"
  21 #include "content/test/content_browser_test_utils.h"
  22 #include "content/test/mock_google_streaming_server.h"
  23 #include "media/audio/mock_audio_manager.h"
  24 #include "media/audio/test_audio_input_controller_factory.h"
  25 #include "testing/gtest/include/gtest/gtest.h"
  26
  27 using base::RunLoop;
  28
  29 namespace content {
  30
  31 class SpeechRecognitionBrowserTest :
  32     public ContentBrowserTest,
  33     public MockGoogleStreamingServer::Delegate,
  34     public media::TestAudioInputControllerDelegate {
  35  public:
  36   enum StreamingServerState {
  37     kIdle,
  38     kTestAudioControllerOpened,
  39     kClientConnected,
  40     kClientAudioUpload,
  41     kClientAudioUploadComplete,
  42     kTestAudioControllerClosed,
  43     kClientDisconnected
  44   };
  45
  46   // MockGoogleStreamingServerDelegate methods.
  47   virtual void OnClientConnected() OVERRIDE {
  48     ASSERT_EQ(kTestAudioControllerOpened, streaming_server_state_);
  49     streaming_server_state_ = kClientConnected;
  50   }
  51
  52   virtual void OnClientAudioUpload() OVERRIDE {
  53     if (streaming_server_state_ == kClientConnected)
  54       streaming_server_state_ = kClientAudioUpload;
  55   }
  56
  57   virtual void OnClientAudioUploadComplete() OVERRIDE {
  58     ASSERT_EQ(kTestAudioControllerClosed, streaming_server_state_);
  59     streaming_server_state_ = kClientAudioUploadComplete;
  60   }
  61
  62   virtual void OnClientDisconnected() OVERRIDE {
  63     ASSERT_EQ(kClientAudioUploadComplete, streaming_server_state_);
  64     streaming_server_state_ = kClientDisconnected;
  65   }
  66
  67   // media::TestAudioInputControllerDelegate methods.
  68   virtual void TestAudioControllerOpened(
  69       media::TestAudioInputController* controller) OVERRIDE {
  70     ASSERT_EQ(kIdle, streaming_server_state_);
  71     streaming_server_state_ = kTestAudioControllerOpened;
  72     const int capture_packet_interval_ms =
  73         (1000 * controller->audio_parameters().frames_per_buffer()) /
  74         controller->audio_parameters().sample_rate();
  75     ASSERT_EQ(GoogleStreamingRemoteEngine::kAudioPacketIntervalMs,
  76         capture_packet_interval_ms);
  77     FeedAudioController(500 /* ms */, /*noise=*/ false);
  78     FeedAudioController(1000 /* ms */, /*noise=*/ true);
  79     FeedAudioController(1000 /* ms */, /*noise=*/ false);
  80   }
  81
  82   virtual void TestAudioControllerClosed(
  83       media::TestAudioInputController* controller) OVERRIDE {
  84     ASSERT_EQ(kClientAudioUpload, streaming_server_state_);
  85     streaming_server_state_ = kTestAudioControllerClosed;
  86     mock_streaming_server_->MockGoogleStreamingServer::SimulateResult(
  87         GetGoodSpeechResult());
  88   }
  89
  90   // Helper methods used by test fixtures.
  91   GURL GetTestUrlFromFragment(const std::string fragment) {
  92     return GURL(GetTestUrl("speech", "web_speech_recognition.html").spec() +
  93         "#" + fragment);
  94   }
  95
  96   std::string GetPageFragment() {
  97     return shell()->web_contents()->GetURL().ref();
  98   }
  99
 100   const StreamingServerState &streaming_server_state() {
 101     return streaming_server_state_;
 102   }
 103
 104  protected:
 105   // ContentBrowserTest methods.
 106   virtual void SetUpInProcessBrowserTestFixture() OVERRIDE {
 107     test_audio_input_controller_factory_.set_delegate(this);
 108     media::AudioInputController::set_factory_for_testing(
 109         &test_audio_input_controller_factory_);
 110     mock_streaming_server_.reset(new MockGoogleStreamingServer(this));
 111     streaming_server_state_ = kIdle;
 112   }
 113
 114   virtual void SetUpOnMainThread() OVERRIDE {
 115     ASSERT_TRUE(SpeechRecognitionManagerImpl::GetInstance());
 116     SpeechRecognizerImpl::SetAudioManagerForTesting(
 117         new media::MockAudioManager(BrowserThread::GetMessageLoopProxyForThread(
 118             BrowserThread::IO)));
 119   }
 120
 121   virtual void TearDownOnMainThread() OVERRIDE {
 122     SpeechRecognizerImpl::SetAudioManagerForTesting(NULL);
 123   }
 124
 125   virtual void TearDownInProcessBrowserTestFixture() OVERRIDE {
 126     test_audio_input_controller_factory_.set_delegate(NULL);
 127     mock_streaming_server_.reset();
 128   }
 129
 130  private:
 131   static void FeedSingleBufferToAudioController(
 132       scoped_refptr<media::TestAudioInputController> controller,
 133       size_t buffer_size,
 134       bool fill_with_noise) {
 135     DCHECK(controller.get());
 136     scoped_ptr<uint8[]> audio_buffer(new uint8[buffer_size]);
 137     if (fill_with_noise) {
 138       for (size_t i = 0; i < buffer_size; ++i)
 139         audio_buffer[i] = static_cast<uint8>(127 * sin(i * 3.14F /
 140             (16 * buffer_size)));
 141     } else {
 142       memset(audio_buffer.get(), 0, buffer_size);
 143     }
 144     controller->event_handler()->OnData(controller,
 145                                         audio_buffer.get(),
 146                                         buffer_size);
 147   }
 148
 149   void FeedAudioController(int duration_ms, bool feed_with_noise) {
 150     media::TestAudioInputController* controller =
 151         test_audio_input_controller_factory_.controller();
 152     ASSERT_TRUE(controller);
 153     const media::AudioParameters& audio_params = controller->audio_parameters();
 154     const size_t buffer_size = audio_params.GetBytesPerBuffer();
 155     const int ms_per_buffer = audio_params.frames_per_buffer() * 1000 /
 156                               audio_params.sample_rate();
 157     // We can only simulate durations that are integer multiples of the
 158     // buffer size. In this regard see
 159     // SpeechRecognitionEngine::GetDesiredAudioChunkDurationMs().
 160     ASSERT_EQ(0, duration_ms % ms_per_buffer);
 161
 162     const int n_buffers = duration_ms / ms_per_buffer;
 163     for (int i = 0; i < n_buffers; ++i) {
 164       base::MessageLoop::current()->PostTask(FROM_HERE, base::Bind(
 165           &FeedSingleBufferToAudioController,
 166           scoped_refptr<media::TestAudioInputController>(controller),
 167           buffer_size,
 168           feed_with_noise));
 169     }
 170   }
 171
 172   SpeechRecognitionResult GetGoodSpeechResult() {
 173     SpeechRecognitionResult result;
 174     result.hypotheses.push_back(SpeechRecognitionHypothesis(
 175         base::UTF8ToUTF16("Pictures of the moon"), 1.0F));
 176     return result;
 177   }
 178
 179   StreamingServerState streaming_server_state_;
 180   scoped_ptr<MockGoogleStreamingServer> mock_streaming_server_;
 181   media::TestAudioInputControllerFactory test_audio_input_controller_factory_;
 182 };
 183
 184 // Simply loads the test page and checks if it was able to create a Speech
 185 // Recognition object in JavaScript, to make sure the Web Speech API is enabled.
 186 IN_PROC_BROWSER_TEST_F(SpeechRecognitionBrowserTest, Precheck) {
 187   NavigateToURLBlockUntilNavigationsComplete(
 188       shell(), GetTestUrlFromFragment("precheck"), 2);
 189
 190   EXPECT_EQ(kIdle, streaming_server_state());
 191   EXPECT_EQ("success", GetPageFragment());
 192 }
 193
 194 IN_PROC_BROWSER_TEST_F(SpeechRecognitionBrowserTest, OneShotRecognition) {
 195   NavigateToURLBlockUntilNavigationsComplete(
 196       shell(), GetTestUrlFromFragment("oneshot"), 2);
 197
 198   EXPECT_EQ(kClientDisconnected, streaming_server_state());
 199   EXPECT_EQ("goodresult1", GetPageFragment());
 200 }
 201
 202 }  // namespace content