chrome/browser/ui/webui/ntp/ntp_user_data_logger_unittest.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 "chrome/browser/ui/webui/ntp/ntp_user_data_logger.h"
   6
   7 #include "base/basictypes.h"
   8 #include "base/metrics/histogram.h"
   9 #include "base/metrics/statistics_recorder.h"
  10 #include "chrome/common/ntp_logging_events.h"
  11 #include "testing/gtest/include/gtest/gtest.h"
  12
  13 namespace {
  14
  15 class TestNTPUserDataLogger : public NTPUserDataLogger {
  16  public:
  17   TestNTPUserDataLogger() : NTPUserDataLogger(NULL) {}
  18   virtual ~TestNTPUserDataLogger() {}
  19 };
  20
  21 base::HistogramBase::Count GetTotalCount(const std::string& histogram_name) {
  22   base::HistogramBase* histogram = base::StatisticsRecorder::FindHistogram(
  23       histogram_name);
  24   return histogram->SnapshotSamples()->TotalCount();
  25 }
  26
  27 base::HistogramBase::Count GetBinCount(const std::string& histogram_name,
  28                                        base::HistogramBase::Sample value) {
  29   base::HistogramBase* histogram = base::StatisticsRecorder::FindHistogram(
  30       histogram_name);
  31   return histogram->SnapshotSamples()->GetCount(value);
  32 }
  33
  34 }  // namespace
  35
  36 TEST(NTPUserDataLoggerTest, TestLogging) {
  37   base::StatisticsRecorder::Initialize();
  38   TestNTPUserDataLogger logger;
  39
  40   // Ensure it works when the statistics are all empty. Only the mouseover
  41   // should be logged in this case. The other histograms are not created yet so
  42   // we can't query them.
  43   logger.EmitNtpStatistics();
  44
  45   EXPECT_EQ(1, GetTotalCount("NewTabPage.NumberOfMouseOvers"));
  46   EXPECT_EQ(1, GetBinCount("NewTabPage.NumberOfMouseOvers", 0));
  47
  48   // Ensure it works with some non-zero statistics. All statistics should now
  49   // be logged.
  50   for (int i = 0; i < 20; ++i)
  51     logger.LogEvent(NTP_MOUSEOVER);
  52   for (int i = 0; i < 8; ++i)
  53     logger.LogEvent(NTP_TILE);
  54   for (int i = 0; i < 4; ++i)
  55     logger.LogEvent(NTP_THUMBNAIL_TILE);
  56   for (int i = 0; i < 2; ++i)
  57     logger.LogEvent(NTP_THUMBNAIL_ERROR);
  58   logger.LogEvent(NTP_GRAY_TILE_FALLBACK);
  59   logger.LogEvent(NTP_EXTERNAL_TILE_FALLBACK);
  60   for (int i = 0; i < 2; ++i)
  61     logger.LogEvent(NTP_EXTERNAL_TILE);
  62   for (int i = 0; i < 2; ++i)
  63     logger.LogEvent(NTP_GRAY_TILE);
  64   logger.LogEvent(NTP_SERVER_SIDE_SUGGESTION);
  65   logger.EmitNtpStatistics();
  66
  67   EXPECT_EQ(2, GetTotalCount("NewTabPage.NumberOfMouseOvers"));
  68   EXPECT_EQ(1, GetBinCount("NewTabPage.NumberOfMouseOvers", 0));
  69   EXPECT_EQ(1, GetBinCount("NewTabPage.NumberOfMouseOvers", 20));
  70   EXPECT_EQ(1, GetTotalCount("NewTabPage.NumberOfTiles"));
  71   EXPECT_EQ(1, GetBinCount("NewTabPage.NumberOfTiles", 8));
  72   EXPECT_EQ(1, GetTotalCount("NewTabPage.NumberOfThumbnailTiles"));
  73   EXPECT_EQ(1, GetBinCount("NewTabPage.NumberOfThumbnailTiles", 4));
  74   EXPECT_EQ(1, GetTotalCount("NewTabPage.NumberOfThumbnailErrors"));
  75   EXPECT_EQ(1, GetBinCount("NewTabPage.NumberOfThumbnailErrors", 2));
  76   EXPECT_EQ(1, GetTotalCount("NewTabPage.NumberOfGrayTileFallbacks"));
  77   EXPECT_EQ(1, GetBinCount("NewTabPage.NumberOfGrayTileFallbacks", 1));
  78   EXPECT_EQ(1, GetTotalCount("NewTabPage.NumberOfExternalTileFallbacks"));
  79   EXPECT_EQ(1, GetBinCount("NewTabPage.NumberOfExternalTileFallbacks", 1));
  80   EXPECT_EQ(1, GetTotalCount("NewTabPage.NumberOfExternalTiles"));
  81   EXPECT_EQ(1, GetBinCount("NewTabPage.NumberOfExternalTiles", 2));
  82   EXPECT_EQ(1, GetTotalCount("NewTabPage.NumberOfGrayTiles"));
  83   EXPECT_EQ(1, GetBinCount("NewTabPage.NumberOfGrayTiles", 2));
  84   EXPECT_EQ(1, GetTotalCount("NewTabPage.SuggestionsType"));
  85   EXPECT_EQ(1, GetBinCount("NewTabPage.SuggestionsType", 1));
  86
  87   // Statistics should be reset to 0, so we should not log anything else.
  88   logger.EmitNtpStatistics();
  89   EXPECT_EQ(3, GetTotalCount("NewTabPage.NumberOfMouseOvers"));
  90   EXPECT_EQ(2, GetBinCount("NewTabPage.NumberOfMouseOvers", 0));
  91   EXPECT_EQ(1, GetBinCount("NewTabPage.NumberOfMouseOvers", 20));
  92   EXPECT_EQ(1, GetTotalCount("NewTabPage.NumberOfTiles"));
  93   EXPECT_EQ(1, GetTotalCount("NewTabPage.NumberOfThumbnailTiles"));
  94   EXPECT_EQ(1, GetTotalCount("NewTabPage.NumberOfThumbnailErrors"));
  95   EXPECT_EQ(1, GetTotalCount("NewTabPage.NumberOfGrayTileFallbacks"));
  96   EXPECT_EQ(1, GetTotalCount("NewTabPage.NumberOfExternalTileFallbacks"));
  97   EXPECT_EQ(1, GetTotalCount("NewTabPage.NumberOfExternalTiles"));
  98   EXPECT_EQ(1, GetTotalCount("NewTabPage.NumberOfGrayTiles"));
  99   EXPECT_EQ(1, GetTotalCount("NewTabPage.SuggestionsType"));
 100 }