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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "base/metrics/histogram.h" | 5 #include "base/metrics/histogram.h" |
6 | 6 |
7 #include <limits.h> | 7 #include <limits.h> |
8 #include <stddef.h> | 8 #include <stddef.h> |
9 #include <stdint.h> | 9 #include <stdint.h> |
10 | 10 |
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140 LOCAL_HISTOGRAM_PERCENTAGE("DuplicatedHistogram", 10); | 140 LOCAL_HISTOGRAM_PERCENTAGE("DuplicatedHistogram", 10); |
141 LOCAL_HISTOGRAM_PERCENTAGE("DuplicatedHistogram", 10); | 141 LOCAL_HISTOGRAM_PERCENTAGE("DuplicatedHistogram", 10); |
142 HistogramBase* histogram = LinearHistogram::FactoryGet( | 142 HistogramBase* histogram = LinearHistogram::FactoryGet( |
143 "DuplicatedHistogram", 1, 101, 102, HistogramBase::kNoFlags); | 143 "DuplicatedHistogram", 1, 101, 102, HistogramBase::kNoFlags); |
144 | 144 |
145 std::unique_ptr<HistogramSamples> samples = histogram->SnapshotSamples(); | 145 std::unique_ptr<HistogramSamples> samples = histogram->SnapshotSamples(); |
146 EXPECT_EQ(2, samples->TotalCount()); | 146 EXPECT_EQ(2, samples->TotalCount()); |
147 EXPECT_EQ(2, samples->GetCount(10)); | 147 EXPECT_EQ(2, samples->GetCount(10)); |
148 } | 148 } |
149 | 149 |
150 // Check that delta calculations work correct. | 150 // Check that delta calculations work correctly. |
151 TEST_P(HistogramTest, DeltaTest) { | 151 TEST_P(HistogramTest, DeltaTest) { |
152 HistogramBase* histogram = | 152 HistogramBase* histogram = |
153 Histogram::FactoryGet("DeltaHistogram", 1, 64, 8, | 153 Histogram::FactoryGet("DeltaHistogram", 1, 64, 8, |
154 HistogramBase::kNoFlags); | 154 HistogramBase::kNoFlags); |
155 histogram->Add(1); | 155 histogram->Add(1); |
156 histogram->Add(10); | 156 histogram->Add(10); |
157 histogram->Add(50); | 157 histogram->Add(50); |
158 | 158 |
159 std::unique_ptr<HistogramSamples> samples = histogram->SnapshotDelta(); | 159 std::unique_ptr<HistogramSamples> samples = histogram->SnapshotDelta(); |
160 EXPECT_EQ(3, samples->TotalCount()); | 160 EXPECT_EQ(3, samples->TotalCount()); |
161 EXPECT_EQ(1, samples->GetCount(1)); | 161 EXPECT_EQ(1, samples->GetCount(1)); |
162 EXPECT_EQ(1, samples->GetCount(10)); | 162 EXPECT_EQ(1, samples->GetCount(10)); |
163 EXPECT_EQ(1, samples->GetCount(50)); | 163 EXPECT_EQ(1, samples->GetCount(50)); |
164 EXPECT_EQ(samples->TotalCount(), samples->redundant_count()); | 164 EXPECT_EQ(samples->TotalCount(), samples->redundant_count()); |
165 | 165 |
166 samples = histogram->SnapshotDelta(); | 166 samples = histogram->SnapshotDelta(); |
167 EXPECT_EQ(0, samples->TotalCount()); | 167 EXPECT_EQ(0, samples->TotalCount()); |
168 | 168 |
169 histogram->Add(10); | 169 histogram->Add(10); |
170 histogram->Add(10); | 170 histogram->Add(10); |
171 samples = histogram->SnapshotDelta(); | 171 samples = histogram->SnapshotDelta(); |
172 EXPECT_EQ(2, samples->TotalCount()); | 172 EXPECT_EQ(2, samples->TotalCount()); |
173 EXPECT_EQ(2, samples->GetCount(10)); | 173 EXPECT_EQ(2, samples->GetCount(10)); |
174 | 174 |
175 samples = histogram->SnapshotDelta(); | 175 samples = histogram->SnapshotDelta(); |
176 EXPECT_EQ(0, samples->TotalCount()); | 176 EXPECT_EQ(0, samples->TotalCount()); |
177 } | 177 } |
178 | 178 |
| 179 // Check that final-delta calculations work correctly. |
| 180 TEST_P(HistogramTest, FinalDeltaTest) { |
| 181 HistogramBase* histogram = |
| 182 Histogram::FactoryGet("FinalDeltaHistogram", 1, 64, 8, |
| 183 HistogramBase::kNoFlags); |
| 184 histogram->Add(1); |
| 185 histogram->Add(10); |
| 186 histogram->Add(50); |
| 187 |
| 188 std::unique_ptr<HistogramSamples> samples = histogram->SnapshotDelta(); |
| 189 EXPECT_EQ(3, samples->TotalCount()); |
| 190 EXPECT_EQ(1, samples->GetCount(1)); |
| 191 EXPECT_EQ(1, samples->GetCount(10)); |
| 192 EXPECT_EQ(1, samples->GetCount(50)); |
| 193 EXPECT_EQ(samples->TotalCount(), samples->redundant_count()); |
| 194 |
| 195 histogram->Add(2); |
| 196 histogram->Add(50); |
| 197 |
| 198 samples = histogram->SnapshotFinalDelta(); |
| 199 EXPECT_EQ(2, samples->TotalCount()); |
| 200 EXPECT_EQ(1, samples->GetCount(2)); |
| 201 EXPECT_EQ(1, samples->GetCount(50)); |
| 202 EXPECT_EQ(samples->TotalCount(), samples->redundant_count()); |
| 203 } |
| 204 |
179 TEST_P(HistogramTest, ExponentialRangesTest) { | 205 TEST_P(HistogramTest, ExponentialRangesTest) { |
180 // Check that we got a nice exponential when there was enough room. | 206 // Check that we got a nice exponential when there was enough room. |
181 BucketRanges ranges(9); | 207 BucketRanges ranges(9); |
182 Histogram::InitializeBucketRanges(1, 64, &ranges); | 208 Histogram::InitializeBucketRanges(1, 64, &ranges); |
183 EXPECT_EQ(0, ranges.range(0)); | 209 EXPECT_EQ(0, ranges.range(0)); |
184 int power_of_2 = 1; | 210 int power_of_2 = 1; |
185 for (int i = 1; i < 8; i++) { | 211 for (int i = 1; i < 8; i++) { |
186 EXPECT_EQ(power_of_2, ranges.range(i)); | 212 EXPECT_EQ(power_of_2, ranges.range(i)); |
187 power_of_2 *= 2; | 213 power_of_2 *= 2; |
188 } | 214 } |
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716 // CustomHistogram needs at least 1 valid range. | 742 // CustomHistogram needs at least 1 valid range. |
717 custom_ranges.clear(); | 743 custom_ranges.clear(); |
718 custom_ranges.push_back(0); | 744 custom_ranges.push_back(0); |
719 EXPECT_DEATH(CustomHistogram::FactoryGet("BadRangesCustom3", custom_ranges, | 745 EXPECT_DEATH(CustomHistogram::FactoryGet("BadRangesCustom3", custom_ranges, |
720 HistogramBase::kNoFlags), | 746 HistogramBase::kNoFlags), |
721 ""); | 747 ""); |
722 } | 748 } |
723 #endif | 749 #endif |
724 | 750 |
725 } // namespace base | 751 } // namespace base |
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