| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you under the Apache License, Version 2.0 (the |
| // "License"); you may not use this file except in compliance |
| // with the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, |
| // software distributed under the License is distributed on an |
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| // KIND, either express or implied. See the License for the |
| // specific language governing permissions and limitations |
| // under the License. |
| |
| #include "util/histogram.h" |
| |
| #include <cmath> |
| #include <gtest/gtest.h> |
| |
| namespace doris { |
| |
| class HistogramTest : public testing::Test { |
| public: |
| HistogramTest() {} |
| virtual ~HistogramTest() {} |
| }; |
| |
| namespace { |
| const HistogramBucketMapper bucket_mapper; |
| const double delta = 0.1; |
| } |
| |
| void populate_histogram(HistogramStat& hist, uint64_t low, |
| uint64_t high, uint64_t loop = 1) { |
| for (; loop > 0; loop--) { |
| for (uint64_t i = low; i <= high; i++) { |
| hist.add(i); |
| } |
| } |
| } |
| |
| TEST_F(HistogramTest, Normal) { |
| HistogramStat hist; |
| ASSERT_TRUE(hist.is_empty()); |
| populate_histogram(hist, 1, 110, 10); |
| ASSERT_EQ(hist.num(), 1100); |
| |
| ASSERT_LE(fabs(hist.percentile(100.0) - 110.0), delta); |
| ASSERT_LE(fabs(hist.percentile(99.0) - 108.9), delta); |
| ASSERT_LE(fabs(hist.percentile(95.0) - 104.5), delta); |
| ASSERT_LE(fabs(hist.median() - 55.0), delta); |
| ASSERT_EQ(hist.average(), 55.5); |
| } |
| |
| TEST_F(HistogramTest, Merge) { |
| HistogramStat hist; |
| HistogramStat other; |
| |
| populate_histogram(hist, 1, 100); |
| populate_histogram(other, 101, 250); |
| hist.merge(other); |
| |
| ASSERT_LE(fabs(hist.percentile(100.0) - 250.0), delta); |
| ASSERT_LE(fabs(hist.percentile(99.0) - 247.5), delta); |
| ASSERT_LE(fabs(hist.percentile(95.0) - 237.5), delta); |
| ASSERT_LE(fabs(hist.median() - 125.0), delta); |
| ASSERT_EQ(hist.average(), 125.5); |
| } |
| |
| TEST_F(HistogramTest, Empty) { |
| HistogramStat hist; |
| ASSERT_EQ(hist.min(), bucket_mapper.last_value()); |
| ASSERT_EQ(hist.max(), 0); |
| ASSERT_EQ(hist.num(), 0); |
| ASSERT_EQ(hist.median(), 0.0); |
| ASSERT_EQ(hist.percentile(85.0), 0.0); |
| ASSERT_EQ(hist.average(), 0.0); |
| ASSERT_EQ(hist.standard_deviation(), 0.0); |
| } |
| |
| TEST_F(HistogramTest, Clear) { |
| HistogramStat hist; |
| populate_histogram(hist, 1, 100); |
| |
| hist.clear(); |
| ASSERT_TRUE(hist.is_empty()); |
| ASSERT_EQ(hist.median(), 0); |
| ASSERT_EQ(hist.percentile(85.0), 0.0); |
| ASSERT_EQ(hist.average(), 0.0); |
| } |
| |
| } // namespace doris |
| |
| int main(int argc, char** argv) { |
| ::testing::InitGoogleTest(&argc, argv); |
| return RUN_ALL_TESTS(); |
| } |