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/macros.h"
11 #include "base/metrics/histogram_delta_serialization.h"
12 #include "base/metrics/histogram_macros.h"
13 #include "base/metrics/statistics_recorder.h"
14 #include "testing/gtest/include/gtest/gtest.h"
15
16 namespace base {
17
18 class HistogramFlattenerDeltaRecorder : public HistogramFlattener {
19 public:
HistogramFlattenerDeltaRecorder()20 HistogramFlattenerDeltaRecorder() {}
21
RecordDelta(const HistogramBase & histogram,const HistogramSamples & snapshot)22 void RecordDelta(const HistogramBase& histogram,
23 const HistogramSamples& snapshot) override {
24 recorded_delta_histogram_names_.push_back(histogram.histogram_name());
25 }
26
InconsistencyDetected(HistogramBase::Inconsistency problem)27 void InconsistencyDetected(HistogramBase::Inconsistency problem) override {
28 ASSERT_TRUE(false);
29 }
30
UniqueInconsistencyDetected(HistogramBase::Inconsistency problem)31 void UniqueInconsistencyDetected(
32 HistogramBase::Inconsistency problem) override {
33 ASSERT_TRUE(false);
34 }
35
InconsistencyDetectedInLoggedCount(int amount)36 void InconsistencyDetectedInLoggedCount(int amount) override {
37 ASSERT_TRUE(false);
38 }
39
GetRecordedDeltaHistogramNames()40 std::vector<std::string> GetRecordedDeltaHistogramNames() {
41 return recorded_delta_histogram_names_;
42 }
43
44 private:
45 std::vector<std::string> recorded_delta_histogram_names_;
46
47 DISALLOW_COPY_AND_ASSIGN(HistogramFlattenerDeltaRecorder);
48 };
49
50 class HistogramSnapshotManagerTest : public testing::Test {
51 protected:
HistogramSnapshotManagerTest()52 HistogramSnapshotManagerTest()
53 : histogram_snapshot_manager_(&histogram_flattener_delta_recorder_) {}
54
~HistogramSnapshotManagerTest()55 ~HistogramSnapshotManagerTest() override {}
56
57 StatisticsRecorder statistics_recorder_;
58 HistogramFlattenerDeltaRecorder histogram_flattener_delta_recorder_;
59 HistogramSnapshotManager histogram_snapshot_manager_;
60 };
61
TEST_F(HistogramSnapshotManagerTest,PrepareDeltasNoFlagsFilter)62 TEST_F(HistogramSnapshotManagerTest, PrepareDeltasNoFlagsFilter) {
63 // kNoFlags filter should record all histograms.
64 UMA_HISTOGRAM_ENUMERATION("UmaHistogram", 1, 2);
65 UMA_STABILITY_HISTOGRAM_ENUMERATION("UmaStabilityHistogram", 1, 2);
66
67 histogram_snapshot_manager_.PrepareDeltas(HistogramBase::kNoFlags,
68 HistogramBase::kNoFlags);
69
70 const std::vector<std::string>& histograms =
71 histogram_flattener_delta_recorder_.GetRecordedDeltaHistogramNames();
72 EXPECT_EQ(2U, histograms.size());
73 EXPECT_EQ("UmaHistogram", histograms[0]);
74 EXPECT_EQ("UmaStabilityHistogram", histograms[1]);
75 }
76
TEST_F(HistogramSnapshotManagerTest,PrepareDeltasUmaHistogramFlagFilter)77 TEST_F(HistogramSnapshotManagerTest, PrepareDeltasUmaHistogramFlagFilter) {
78 // Note that kUmaStabilityHistogramFlag includes kUmaTargetedHistogramFlag.
79 UMA_HISTOGRAM_ENUMERATION("UmaHistogram", 1, 2);
80 UMA_STABILITY_HISTOGRAM_ENUMERATION("UmaStabilityHistogram", 1, 2);
81
82 histogram_snapshot_manager_.PrepareDeltas(
83 HistogramBase::kNoFlags, HistogramBase::kUmaTargetedHistogramFlag);
84
85 const std::vector<std::string>& histograms =
86 histogram_flattener_delta_recorder_.GetRecordedDeltaHistogramNames();
87 EXPECT_EQ(2U, histograms.size());
88 EXPECT_EQ("UmaHistogram", histograms[0]);
89 EXPECT_EQ("UmaStabilityHistogram", histograms[1]);
90 }
91
TEST_F(HistogramSnapshotManagerTest,PrepareDeltasUmaStabilityHistogramFlagFilter)92 TEST_F(HistogramSnapshotManagerTest,
93 PrepareDeltasUmaStabilityHistogramFlagFilter) {
94 UMA_HISTOGRAM_ENUMERATION("UmaHistogram", 1, 2);
95 UMA_STABILITY_HISTOGRAM_ENUMERATION("UmaStabilityHistogram", 1, 2);
96
97 histogram_snapshot_manager_.PrepareDeltas(
98 HistogramBase::kNoFlags, HistogramBase::kUmaStabilityHistogramFlag);
99
100 const std::vector<std::string>& histograms =
101 histogram_flattener_delta_recorder_.GetRecordedDeltaHistogramNames();
102 EXPECT_EQ(1U, histograms.size());
103 EXPECT_EQ("UmaStabilityHistogram", histograms[0]);
104 }
105
106 } // namespace base
107