src/base/metrics/histogram_snapshot_manager_unittest.cc

   1 // Copyright 2014 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 "base/metrics/histogram_snapshot_manager.h"
   6
   7 #include <string>
   8 #include <vector>
   9
  10 #include "base/metrics/histogram.h"
  11 #include "base/metrics/histogram_delta_serialization.h"
  12 #include "base/metrics/statistics_recorder.h"
  13 #include "testing/gtest/include/gtest/gtest.h"
  14
  15 namespace base {
  16
  17 class HistogramFlattenerDeltaRecorder : public HistogramFlattener {
  18  public:
  19   HistogramFlattenerDeltaRecorder() {}
  20
  21   void RecordDelta(const HistogramBase& histogram,
  22                    const HistogramSamples& snapshot) override {
  23     recorded_delta_histogram_names_.push_back(histogram.histogram_name());
  24   }
  25
  26   void InconsistencyDetected(HistogramBase::Inconsistency problem) override {
  27     ASSERT_TRUE(false);
  28   }
  29
  30   void UniqueInconsistencyDetected(
  31       HistogramBase::Inconsistency problem) override {
  32     ASSERT_TRUE(false);
  33   }
  34
  35   void InconsistencyDetectedInLoggedCount(int amount) override {
  36     ASSERT_TRUE(false);
  37   }
  38
  39   std::vector<std::string> GetRecordedDeltaHistogramNames() {
  40     return recorded_delta_histogram_names_;
  41   }
  42
  43  private:
  44   std::vector<std::string> recorded_delta_histogram_names_;
  45
  46   DISALLOW_COPY_AND_ASSIGN(HistogramFlattenerDeltaRecorder);
  47 };
  48
  49 class HistogramSnapshotManagerTest : public testing::Test {
  50  protected:
  51   HistogramSnapshotManagerTest()
  52       : histogram_snapshot_manager_(&histogram_flattener_delta_recorder_) {}
  53
  54   virtual ~HistogramSnapshotManagerTest() {}
  55
  56   StatisticsRecorder statistics_recorder_;
  57   HistogramFlattenerDeltaRecorder histogram_flattener_delta_recorder_;
  58   HistogramSnapshotManager histogram_snapshot_manager_;
  59 };
  60
  61 TEST_F(HistogramSnapshotManagerTest, PrepareDeltasNoFlagsFilter) {
  62   // kNoFlags filter should record all histograms.
  63   UMA_HISTOGRAM_ENUMERATION("UmaHistogram", 1, 2);
  64   UMA_STABILITY_HISTOGRAM_ENUMERATION("UmaStabilityHistogram", 1, 2);
  65
  66   histogram_snapshot_manager_.PrepareDeltas(HistogramBase::kNoFlags,
  67                                             HistogramBase::kNoFlags);
  68
  69   const std::vector<std::string>& histograms =
  70       histogram_flattener_delta_recorder_.GetRecordedDeltaHistogramNames();
  71   EXPECT_EQ(2U, histograms.size());
  72   EXPECT_EQ("UmaHistogram", histograms[0]);
  73   EXPECT_EQ("UmaStabilityHistogram", histograms[1]);
  74 }
  75
  76 TEST_F(HistogramSnapshotManagerTest, PrepareDeltasUmaHistogramFlagFilter) {
  77   // Note that kUmaStabilityHistogramFlag includes kUmaTargetedHistogramFlag.
  78   UMA_HISTOGRAM_ENUMERATION("UmaHistogram", 1, 2);
  79   UMA_STABILITY_HISTOGRAM_ENUMERATION("UmaStabilityHistogram", 1, 2);
  80
  81   histogram_snapshot_manager_.PrepareDeltas(
  82       HistogramBase::kNoFlags, HistogramBase::kUmaTargetedHistogramFlag);
  83
  84   const std::vector<std::string>& histograms =
  85       histogram_flattener_delta_recorder_.GetRecordedDeltaHistogramNames();
  86   EXPECT_EQ(2U, histograms.size());
  87   EXPECT_EQ("UmaHistogram", histograms[0]);
  88   EXPECT_EQ("UmaStabilityHistogram", histograms[1]);
  89 }
  90
  91 TEST_F(HistogramSnapshotManagerTest,
  92        PrepareDeltasUmaStabilityHistogramFlagFilter) {
  93   UMA_HISTOGRAM_ENUMERATION("UmaHistogram", 1, 2);
  94   UMA_STABILITY_HISTOGRAM_ENUMERATION("UmaStabilityHistogram", 1, 2);
  95
  96   histogram_snapshot_manager_.PrepareDeltas(
  97       HistogramBase::kNoFlags, HistogramBase::kUmaStabilityHistogramFlag);
  98
  99   const std::vector<std::string>& histograms =
 100       histogram_flattener_delta_recorder_.GetRecordedDeltaHistogramNames();
 101   EXPECT_EQ(1U, histograms.size());
 102   EXPECT_EQ("UmaStabilityHistogram", histograms[0]);
 103 }
 104
 105 }  // namespace base