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