src/base/metrics/histogram_base_unittest.cc

   1 // Copyright (c) 2012 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 <vector>
   6
   7 #include "base/metrics/histogram.h"
   8 #include "base/metrics/histogram_base.h"
   9 #include "base/metrics/sparse_histogram.h"
  10 #include "base/metrics/statistics_recorder.h"
  11 #include "base/pickle.h"
  12 #include "testing/gtest/include/gtest/gtest.h"
  13
  14 namespace base {
  15
  16 class HistogramBaseTest : public testing::Test {
  17  protected:
  18   HistogramBaseTest() {
  19     // Each test will have a clean state (no Histogram / BucketRanges
  20     // registered).
  21     statistics_recorder_ = NULL;
  22     ResetStatisticsRecorder();
  23   }
  24
  25   virtual ~HistogramBaseTest() {
  26     delete statistics_recorder_;
  27   }
  28
  29   void ResetStatisticsRecorder() {
  30     delete statistics_recorder_;
  31     statistics_recorder_ = new StatisticsRecorder();
  32   }
  33
  34  private:
  35   StatisticsRecorder* statistics_recorder_;
  36 };
  37
  38 TEST_F(HistogramBaseTest, DeserializeHistogram) {
  39   HistogramBase* histogram = Histogram::FactoryGet(
  40       "TestHistogram", 1, 1000, 10,
  41       (HistogramBase::kUmaTargetedHistogramFlag |
  42       HistogramBase::kIPCSerializationSourceFlag));
  43
  44   Pickle pickle;
  45   ASSERT_TRUE(histogram->SerializeInfo(&pickle));
  46
  47   PickleIterator iter(pickle);
  48   HistogramBase* deserialized = DeserializeHistogramInfo(&iter);
  49   EXPECT_EQ(histogram, deserialized);
  50
  51   ResetStatisticsRecorder();
  52
  53   PickleIterator iter2(pickle);
  54   deserialized = DeserializeHistogramInfo(&iter2);
  55   EXPECT_TRUE(deserialized);
  56   EXPECT_NE(histogram, deserialized);
  57   EXPECT_EQ("TestHistogram", deserialized->histogram_name());
  58   EXPECT_TRUE(deserialized->HasConstructionArguments(1, 1000, 10));
  59
  60   // kIPCSerializationSourceFlag will be cleared.
  61   EXPECT_EQ(HistogramBase::kUmaTargetedHistogramFlag, deserialized->flags());
  62 }
  63
  64 TEST_F(HistogramBaseTest, DeserializeLinearHistogram) {
  65   HistogramBase* histogram = LinearHistogram::FactoryGet(
  66       "TestHistogram", 1, 1000, 10,
  67       HistogramBase::kIPCSerializationSourceFlag);
  68
  69   Pickle pickle;
  70   ASSERT_TRUE(histogram->SerializeInfo(&pickle));
  71
  72   PickleIterator iter(pickle);
  73   HistogramBase* deserialized = DeserializeHistogramInfo(&iter);
  74   EXPECT_EQ(histogram, deserialized);
  75
  76   ResetStatisticsRecorder();
  77
  78   PickleIterator iter2(pickle);
  79   deserialized = DeserializeHistogramInfo(&iter2);
  80   EXPECT_TRUE(deserialized);
  81   EXPECT_NE(histogram, deserialized);
  82   EXPECT_EQ("TestHistogram", deserialized->histogram_name());
  83   EXPECT_TRUE(deserialized->HasConstructionArguments(1, 1000, 10));
  84   EXPECT_EQ(0, deserialized->flags());
  85 }
  86
  87 TEST_F(HistogramBaseTest, DeserializeBooleanHistogram) {
  88   HistogramBase* histogram = BooleanHistogram::FactoryGet(
  89       "TestHistogram", HistogramBase::kIPCSerializationSourceFlag);
  90
  91   Pickle pickle;
  92   ASSERT_TRUE(histogram->SerializeInfo(&pickle));
  93
  94   PickleIterator iter(pickle);
  95   HistogramBase* deserialized = DeserializeHistogramInfo(&iter);
  96   EXPECT_EQ(histogram, deserialized);
  97
  98   ResetStatisticsRecorder();
  99
 100   PickleIterator iter2(pickle);
 101   deserialized = DeserializeHistogramInfo(&iter2);
 102   EXPECT_TRUE(deserialized);
 103   EXPECT_NE(histogram, deserialized);
 104   EXPECT_EQ("TestHistogram", deserialized->histogram_name());
 105   EXPECT_TRUE(deserialized->HasConstructionArguments(1, 2, 3));
 106   EXPECT_EQ(0, deserialized->flags());
 107 }
 108
 109 TEST_F(HistogramBaseTest, DeserializeCustomHistogram) {
 110   std::vector<HistogramBase::Sample> ranges;
 111   ranges.push_back(13);
 112   ranges.push_back(5);
 113   ranges.push_back(9);
 114
 115   HistogramBase* histogram = CustomHistogram::FactoryGet(
 116       "TestHistogram", ranges, HistogramBase::kIPCSerializationSourceFlag);
 117
 118   Pickle pickle;
 119   ASSERT_TRUE(histogram->SerializeInfo(&pickle));
 120
 121   PickleIterator iter(pickle);
 122   HistogramBase* deserialized = DeserializeHistogramInfo(&iter);
 123   EXPECT_EQ(histogram, deserialized);
 124
 125   ResetStatisticsRecorder();
 126
 127   PickleIterator iter2(pickle);
 128   deserialized = DeserializeHistogramInfo(&iter2);
 129   EXPECT_TRUE(deserialized);
 130   EXPECT_NE(histogram, deserialized);
 131   EXPECT_EQ("TestHistogram", deserialized->histogram_name());
 132   EXPECT_TRUE(deserialized->HasConstructionArguments(5, 13, 4));
 133   EXPECT_EQ(0, deserialized->flags());
 134 }
 135
 136 TEST_F(HistogramBaseTest, DeserializeSparseHistogram) {
 137   HistogramBase* histogram = SparseHistogram::FactoryGet(
 138       "TestHistogram", HistogramBase::kIPCSerializationSourceFlag);
 139
 140   Pickle pickle;
 141   ASSERT_TRUE(histogram->SerializeInfo(&pickle));
 142
 143   PickleIterator iter(pickle);
 144   HistogramBase* deserialized = DeserializeHistogramInfo(&iter);
 145   EXPECT_EQ(histogram, deserialized);
 146
 147   ResetStatisticsRecorder();
 148
 149   PickleIterator iter2(pickle);
 150   deserialized = DeserializeHistogramInfo(&iter2);
 151   EXPECT_TRUE(deserialized);
 152   EXPECT_NE(histogram, deserialized);
 153   EXPECT_EQ("TestHistogram", deserialized->histogram_name());
 154   EXPECT_EQ(0, deserialized->flags());
 155 }
 156
 157 }  // namespace base