utils/benchmark/test/statistics_gtest.cc

   1 //===---------------------------------------------------------------------===//
   2 // statistics_test - Unit tests for src/statistics.cc
   3 //===---------------------------------------------------------------------===//
   4
   5 #include "../src/statistics.h"
   6 #include "gtest/gtest.h"
   7
   8 namespace {
   9 TEST(StatisticsTest, Mean) {
  10   std::vector<double> Inputs;
  11   {
  12     Inputs = {42, 42, 42, 42};
  13     double Res = benchmark::StatisticsMean(Inputs);
  14     EXPECT_DOUBLE_EQ(Res, 42.0);
  15   }
  16   {
  17     Inputs = {1, 2, 3, 4};
  18     double Res = benchmark::StatisticsMean(Inputs);
  19     EXPECT_DOUBLE_EQ(Res, 2.5);
  20   }
  21   {
  22     Inputs = {1, 2, 5, 10, 10, 14};
  23     double Res = benchmark::StatisticsMean(Inputs);
  24     EXPECT_DOUBLE_EQ(Res, 7.0);
  25   }
  26 }
  27
  28 TEST(StatisticsTest, Median) {
  29   std::vector<double> Inputs;
  30   {
  31     Inputs = {42, 42, 42, 42};
  32     double Res = benchmark::StatisticsMedian(Inputs);
  33     EXPECT_DOUBLE_EQ(Res, 42.0);
  34   }
  35   {
  36     Inputs = {1, 2, 3, 4};
  37     double Res = benchmark::StatisticsMedian(Inputs);
  38     EXPECT_DOUBLE_EQ(Res, 2.5);
  39   }
  40   {
  41     Inputs = {1, 2, 5, 10, 10};
  42     double Res = benchmark::StatisticsMedian(Inputs);
  43     EXPECT_DOUBLE_EQ(Res, 5.0);
  44   }
  45 }
  46
  47 TEST(StatisticsTest, StdDev) {
  48   std::vector<double> Inputs;
  49   {
  50     Inputs = {101, 101, 101, 101};
  51     double Res = benchmark::StatisticsStdDev(Inputs);
  52     EXPECT_DOUBLE_EQ(Res, 0.0);
  53   }
  54   {
  55     Inputs = {1, 2, 3};
  56     double Res = benchmark::StatisticsStdDev(Inputs);
  57     EXPECT_DOUBLE_EQ(Res, 1.0);
  58   }
  59 }
  60
  61 }  // end namespace