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RocksDB for Erlang

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rocksdb deps snappy third_party benchmark test statistics_gtest.cc
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deps/snappy/third_party/benchmark/test/statistics_gtest.cc 

//===---------------------------------------------------------------------===//

// statistics_test - Unit tests for src/statistics.cc

//===---------------------------------------------------------------------===//



#include "../src/statistics.h"

#include "gtest/gtest.h"



namespace {

TEST(StatisticsTest, Mean) {

  EXPECT_DOUBLE_EQ(benchmark::StatisticsMean({42, 42, 42, 42}), 42.0);

  EXPECT_DOUBLE_EQ(benchmark::StatisticsMean({1, 2, 3, 4}), 2.5);

  EXPECT_DOUBLE_EQ(benchmark::StatisticsMean({1, 2, 5, 10, 10, 14}), 7.0);

}



TEST(StatisticsTest, Median) {

  EXPECT_DOUBLE_EQ(benchmark::StatisticsMedian({42, 42, 42, 42}), 42.0);

  EXPECT_DOUBLE_EQ(benchmark::StatisticsMedian({1, 2, 3, 4}), 2.5);

  EXPECT_DOUBLE_EQ(benchmark::StatisticsMedian({1, 2, 5, 10, 10}), 5.0);

}



TEST(StatisticsTest, StdDev) {

  EXPECT_DOUBLE_EQ(benchmark::StatisticsStdDev({101, 101, 101, 101}), 0.0);

  EXPECT_DOUBLE_EQ(benchmark::StatisticsStdDev({1, 2, 3}), 1.0);

  EXPECT_DOUBLE_EQ(benchmark::StatisticsStdDev({2.5, 2.4, 3.3, 4.2, 5.1}),

                   1.151086443322134);

}



TEST(StatisticsTest, CV) {

  EXPECT_DOUBLE_EQ(benchmark::StatisticsCV({101, 101, 101, 101}), 0.0);

  EXPECT_DOUBLE_EQ(benchmark::StatisticsCV({1, 2, 3}), 1. / 2.);

  EXPECT_DOUBLE_EQ(benchmark::StatisticsCV({2.5, 2.4, 3.3, 4.2, 5.1}),

                   0.32888184094918121);

}



}  // end namespace