1 /*
2 * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
3 *
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
9 */
10
11 #include <map>
12 #include <memory>
13 #include <string>
14 #include <utility>
15
16 #include "rtc_base/checks.h"
17 #include "system_wrappers/include/metrics.h"
18 #include "test/gtest.h"
19
20 #if RTC_METRICS_ENABLED
21 namespace webrtc {
22
23 namespace {
24 const int kSample = 22;
25 const char kName[] = "Name";
26
NumSamples(const std::string & name,const std::map<std::string,std::unique_ptr<metrics::SampleInfo>> & histograms)27 int NumSamples(
28 const std::string& name,
29 const std::map<std::string, std::unique_ptr<metrics::SampleInfo>>&
30 histograms) {
31 const auto it = histograms.find(name);
32 if (it == histograms.end())
33 return 0;
34
35 int num_samples = 0;
36 for (const auto& sample : it->second->samples)
37 num_samples += sample.second;
38
39 return num_samples;
40 }
41
NumEvents(const std::string & name,int sample,const std::map<std::string,std::unique_ptr<metrics::SampleInfo>> & histograms)42 int NumEvents(const std::string& name,
43 int sample,
44 const std::map<std::string, std::unique_ptr<metrics::SampleInfo>>&
45 histograms) {
46 const auto it = histograms.find(name);
47 if (it == histograms.end())
48 return 0;
49
50 const auto it_sample = it->second->samples.find(sample);
51 if (it_sample == it->second->samples.end())
52 return 0;
53
54 return it_sample->second;
55 }
56 } // namespace
57
58 class MetricsDefaultTest : public ::testing::Test {
59 public:
MetricsDefaultTest()60 MetricsDefaultTest() {}
61
62 protected:
SetUp()63 void SetUp() override { metrics::Reset(); }
64 };
65
TEST_F(MetricsDefaultTest,Reset)66 TEST_F(MetricsDefaultTest, Reset) {
67 RTC_HISTOGRAM_PERCENTAGE(kName, kSample);
68 EXPECT_EQ(1, metrics::NumSamples(kName));
69 metrics::Reset();
70 EXPECT_EQ(0, metrics::NumSamples(kName));
71 }
72
TEST_F(MetricsDefaultTest,NumSamples)73 TEST_F(MetricsDefaultTest, NumSamples) {
74 RTC_HISTOGRAM_PERCENTAGE(kName, 5);
75 RTC_HISTOGRAM_PERCENTAGE(kName, 5);
76 RTC_HISTOGRAM_PERCENTAGE(kName, 10);
77 EXPECT_EQ(3, metrics::NumSamples(kName));
78 EXPECT_EQ(0, metrics::NumSamples("NonExisting"));
79 }
80
TEST_F(MetricsDefaultTest,NumEvents)81 TEST_F(MetricsDefaultTest, NumEvents) {
82 RTC_HISTOGRAM_PERCENTAGE(kName, 5);
83 RTC_HISTOGRAM_PERCENTAGE(kName, 5);
84 RTC_HISTOGRAM_PERCENTAGE(kName, 10);
85 EXPECT_EQ(2, metrics::NumEvents(kName, 5));
86 EXPECT_EQ(1, metrics::NumEvents(kName, 10));
87 EXPECT_EQ(0, metrics::NumEvents(kName, 11));
88 EXPECT_EQ(0, metrics::NumEvents("NonExisting", 5));
89 }
90
TEST_F(MetricsDefaultTest,MinSample)91 TEST_F(MetricsDefaultTest, MinSample) {
92 RTC_HISTOGRAM_PERCENTAGE(kName, kSample);
93 RTC_HISTOGRAM_PERCENTAGE(kName, kSample + 1);
94 EXPECT_EQ(kSample, metrics::MinSample(kName));
95 EXPECT_EQ(-1, metrics::MinSample("NonExisting"));
96 }
97
TEST_F(MetricsDefaultTest,Overflow)98 TEST_F(MetricsDefaultTest, Overflow) {
99 const std::string kName = "Overflow";
100 // Samples should end up in overflow bucket.
101 RTC_HISTOGRAM_PERCENTAGE(kName, 101);
102 EXPECT_EQ(1, metrics::NumSamples(kName));
103 EXPECT_EQ(1, metrics::NumEvents(kName, 101));
104 RTC_HISTOGRAM_PERCENTAGE(kName, 102);
105 EXPECT_EQ(2, metrics::NumSamples(kName));
106 EXPECT_EQ(2, metrics::NumEvents(kName, 101));
107 }
108
TEST_F(MetricsDefaultTest,Underflow)109 TEST_F(MetricsDefaultTest, Underflow) {
110 const std::string kName = "Underflow";
111 // Samples should end up in underflow bucket.
112 RTC_HISTOGRAM_COUNTS_10000(kName, 0);
113 EXPECT_EQ(1, metrics::NumSamples(kName));
114 EXPECT_EQ(1, metrics::NumEvents(kName, 0));
115 RTC_HISTOGRAM_COUNTS_10000(kName, -1);
116 EXPECT_EQ(2, metrics::NumSamples(kName));
117 EXPECT_EQ(2, metrics::NumEvents(kName, 0));
118 }
119
TEST_F(MetricsDefaultTest,GetAndReset)120 TEST_F(MetricsDefaultTest, GetAndReset) {
121 std::map<std::string, std::unique_ptr<metrics::SampleInfo>> histograms;
122 metrics::GetAndReset(&histograms);
123 EXPECT_EQ(0u, histograms.size());
124 RTC_HISTOGRAM_PERCENTAGE("Histogram1", 4);
125 RTC_HISTOGRAM_PERCENTAGE("Histogram1", 5);
126 RTC_HISTOGRAM_PERCENTAGE("Histogram1", 5);
127 RTC_HISTOGRAM_PERCENTAGE("Histogram2", 10);
128 EXPECT_EQ(3, metrics::NumSamples("Histogram1"));
129 EXPECT_EQ(1, metrics::NumSamples("Histogram2"));
130
131 metrics::GetAndReset(&histograms);
132 EXPECT_EQ(2u, histograms.size());
133 EXPECT_EQ(0, metrics::NumSamples("Histogram1"));
134 EXPECT_EQ(0, metrics::NumSamples("Histogram2"));
135
136 EXPECT_EQ(3, NumSamples("Histogram1", histograms));
137 EXPECT_EQ(1, NumSamples("Histogram2", histograms));
138 EXPECT_EQ(1, NumEvents("Histogram1", 4, histograms));
139 EXPECT_EQ(2, NumEvents("Histogram1", 5, histograms));
140 EXPECT_EQ(1, NumEvents("Histogram2", 10, histograms));
141
142 // Add samples after reset.
143 metrics::GetAndReset(&histograms);
144 EXPECT_EQ(0u, histograms.size());
145 RTC_HISTOGRAM_PERCENTAGE("Histogram1", 50);
146 RTC_HISTOGRAM_PERCENTAGE("Histogram2", 8);
147 EXPECT_EQ(1, metrics::NumSamples("Histogram1"));
148 EXPECT_EQ(1, metrics::NumSamples("Histogram2"));
149 EXPECT_EQ(1, metrics::NumEvents("Histogram1", 50));
150 EXPECT_EQ(1, metrics::NumEvents("Histogram2", 8));
151 }
152
TEST_F(MetricsDefaultTest,TestMinMaxBucket)153 TEST_F(MetricsDefaultTest, TestMinMaxBucket) {
154 const std::string kName = "MinMaxCounts100";
155 RTC_HISTOGRAM_COUNTS_100(kName, 4);
156
157 std::map<std::string, std::unique_ptr<metrics::SampleInfo>> histograms;
158 metrics::GetAndReset(&histograms);
159 EXPECT_EQ(1u, histograms.size());
160 EXPECT_EQ(kName, histograms.begin()->second->name);
161 EXPECT_EQ(1, histograms.begin()->second->min);
162 EXPECT_EQ(100, histograms.begin()->second->max);
163 EXPECT_EQ(50u, histograms.begin()->second->bucket_count);
164 EXPECT_EQ(1u, histograms.begin()->second->samples.size());
165 }
166
167 } // namespace webrtc
168 #endif
169