Histogram_test.cc

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#include <gtest/gtest.h>
 
#include <ACG/Utils/Histogram.hh>
 
#include <numeric>
 
using ACG::Histogram;
using ACG::HistogramT;
 
class HistogramTest : public testing::Test {
 
public:
  HistogramTest()
  {
  }
 
protected:
  // This function is called before each test is run
  virtual void SetUp() {
  }
 
  // This function is called after all tests are through
  virtual void TearDown() {
  }
};
 
TEST_F(HistogramTest, simpleDouble ) {
    std::vector<double> v {1.0, 1.1, 2.0};
    auto hist =  ACG::create_histogram_auto(v,2);
 
    std::vector<size_t> correct_bins {2, 1};
    EXPECT_EQ(hist->getBins(), correct_bins);
 
 
    auto widths = hist->getBinWidths();
    ASSERT_EQ(widths.size(), 2u);
    EXPECT_DOUBLE_EQ(widths[0], 0.5);
    EXPECT_DOUBLE_EQ(widths[1], 0.5);
 
    double width_sum = std::accumulate(widths.begin(), widths.end(), 0.0);
    double total_width = hist->getTotalWidth();
    EXPECT_DOUBLE_EQ(total_width, 1.0);
    EXPECT_DOUBLE_EQ(total_width, width_sum);
 
}
 
#if 0 // not yet implemented
TEST_F(HistogramTest, simpleInt ) {
    std::vector<int> v {0, 1, 1, 2, 5};
    HistogramT<int> hist(v.begin(), v.end(), 3);
    // should be: 0-1, 2-3, 4-5
    //    counts: 3    1    1
 
    std::vector<size_t> correct_bins {2, 1, 1};
    EXPECT_EQ(hist.getBins(), correct_bins);
 
 
    auto widths = hist.getBinWidths();
    ASSERT_EQ(widths.size(), 3);
    EXPECT_EQ(widths[0], 2);
    EXPECT_EQ(widths[1], 2);
    EXPECT_EQ(widths[2], 2);
 
    int width_sum = std::accumulate(widths.begin(), widths.end(), 0.0);
    int total_width = hist.getTotalWidth();
    EXPECT_EQ(total_width, 6);
    EXPECT_EQ(total_width, width_sum);
 
    std::vector<int> correct_boundaries {0, 2, 4, 5};
    auto boundaries = hist.getBinBoundaries();
    ASSERT_EQ(boundaries, correct_boundaries);
}
#endif