content/browser/media/media_internals_unittest.cc

   1 // Copyright (c) 2011 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 "content/browser/media/media_internals.h"
   6
   7 #include "base/bind.h"
   8 #include "base/bind_helpers.h"
   9 #include "base/json/json_reader.h"
  10 #include "base/run_loop.h"
  11 #include "base/strings/utf_string_conversions.h"
  12 #include "content/public/test/test_browser_thread_bundle.h"
  13 #include "media/audio/audio_parameters.h"
  14 #include "media/base/channel_layout.h"
  15 #include "testing/gtest/include/gtest/gtest.h"
  16
  17 namespace {
  18 const int kTestComponentID = 0;
  19 const char kTestDeviceID[] = "test-device-id";
  20 }  // namespace
  21
  22 namespace content {
  23
  24 class MediaInternalsTest
  25     : public testing::TestWithParam<media::AudioLogFactory::AudioComponent> {
  26  public:
  27   MediaInternalsTest()
  28       : media_internals_(MediaInternals::GetInstance()),
  29         update_cb_(base::Bind(&MediaInternalsTest::UpdateCallbackImpl,
  30                               base::Unretained(this))),
  31         test_params_(media::AudioParameters::AUDIO_PCM_LINEAR,
  32                      media::CHANNEL_LAYOUT_MONO,
  33                      0,
  34                      48000,
  35                      16,
  36                      128,
  37                      media::AudioParameters::ECHO_CANCELLER |
  38                      media::AudioParameters::DUCKING),
  39         test_component_(GetParam()),
  40         audio_log_(media_internals_->CreateAudioLog(test_component_)) {
  41     media_internals_->AddUpdateCallback(update_cb_);
  42   }
  43
  44   virtual ~MediaInternalsTest() {
  45     media_internals_->RemoveUpdateCallback(update_cb_);
  46   }
  47
  48  protected:
  49   // Extracts and deserializes the JSON update data; merges into |update_data_|.
  50   void UpdateCallbackImpl(const base::string16& update) {
  51     // Each update string looks like "<JavaScript Function Name>({<JSON>});", to
  52     // use the JSON reader we need to strip out the JavaScript code.
  53     std::string utf8_update = base::UTF16ToUTF8(update);
  54     const std::string::size_type first_brace = utf8_update.find('{');
  55     const std::string::size_type last_brace = utf8_update.rfind('}');
  56     scoped_ptr<base::Value> output_value(base::JSONReader::Read(
  57         utf8_update.substr(first_brace, last_brace - first_brace + 1)));
  58     CHECK(output_value);
  59
  60     base::DictionaryValue* output_dict = NULL;
  61     CHECK(output_value->GetAsDictionary(&output_dict));
  62     update_data_.MergeDictionary(output_dict);
  63   }
  64
  65   void ExpectInt(const std::string& key, int expected_value) {
  66     int actual_value = 0;
  67     ASSERT_TRUE(update_data_.GetInteger(key, &actual_value));
  68     EXPECT_EQ(expected_value, actual_value);
  69   }
  70
  71   void ExpectString(const std::string& key, const std::string& expected_value) {
  72     std::string actual_value;
  73     ASSERT_TRUE(update_data_.GetString(key, &actual_value));
  74     EXPECT_EQ(expected_value, actual_value);
  75   }
  76
  77   void ExpectStatus(const std::string& expected_value) {
  78     ExpectString("status", expected_value);
  79   }
  80
  81   TestBrowserThreadBundle thread_bundle_;
  82   MediaInternals* const media_internals_;
  83   MediaInternals::UpdateCallback update_cb_;
  84   base::DictionaryValue update_data_;
  85   const media::AudioParameters test_params_;
  86   const media::AudioLogFactory::AudioComponent test_component_;
  87   scoped_ptr<media::AudioLog> audio_log_;
  88 };
  89
  90 TEST_P(MediaInternalsTest, AudioLogCreateStartStopErrorClose) {
  91   audio_log_->OnCreated(
  92       kTestComponentID, test_params_, kTestDeviceID);
  93   base::RunLoop().RunUntilIdle();
  94
  95   ExpectString("channel_layout",
  96                media::ChannelLayoutToString(test_params_.channel_layout()));
  97   ExpectInt("sample_rate", test_params_.sample_rate());
  98   ExpectInt("frames_per_buffer", test_params_.frames_per_buffer());
  99   ExpectInt("channels", test_params_.channels());
 100   ExpectInt("input_channels", test_params_.input_channels());
 101   ExpectString("effects", "ECHO_CANCELLER | DUCKING");
 102   ExpectString("device_id", kTestDeviceID);
 103   ExpectInt("component_id", kTestComponentID);
 104   ExpectInt("component_type", test_component_);
 105   ExpectStatus("created");
 106
 107   // Verify OnStarted().
 108   audio_log_->OnStarted(kTestComponentID);
 109   base::RunLoop().RunUntilIdle();
 110   ExpectStatus("started");
 111
 112   // Verify OnStopped().
 113   audio_log_->OnStopped(kTestComponentID);
 114   base::RunLoop().RunUntilIdle();
 115   ExpectStatus("stopped");
 116
 117   // Verify OnError().
 118   const char kErrorKey[] = "error_occurred";
 119   std::string no_value;
 120   ASSERT_FALSE(update_data_.GetString(kErrorKey, &no_value));
 121   audio_log_->OnError(kTestComponentID);
 122   base::RunLoop().RunUntilIdle();
 123   ExpectString(kErrorKey, "true");
 124
 125   // Verify OnClosed().
 126   audio_log_->OnClosed(kTestComponentID);
 127   base::RunLoop().RunUntilIdle();
 128   ExpectStatus("closed");
 129 }
 130
 131 TEST_P(MediaInternalsTest, AudioLogCreateClose) {
 132   audio_log_->OnCreated(
 133       kTestComponentID, test_params_, kTestDeviceID);
 134   base::RunLoop().RunUntilIdle();
 135   ExpectStatus("created");
 136
 137   audio_log_->OnClosed(kTestComponentID);
 138   base::RunLoop().RunUntilIdle();
 139   ExpectStatus("closed");
 140 }
 141
 142 INSTANTIATE_TEST_CASE_P(
 143     MediaInternalsTest, MediaInternalsTest, testing::Values(
 144         media::AudioLogFactory::AUDIO_INPUT_CONTROLLER,
 145         media::AudioLogFactory::AUDIO_OUTPUT_CONTROLLER,
 146         media::AudioLogFactory::AUDIO_OUTPUT_STREAM));
 147
 148 }  // namespace content