Function TestRound

Common/Core/Testing/Cxx/UnitTestMath.cxx:253–333

Validate with http://en.wikipedia.org/wiki/Rounding#Rounding_to_integer

// Validate with http://en.wikipedia.org/wiki/Rounding#Rounding_to_integer
int TestRound()
{
  int status = 0;
  std::cout << "Round..";
  int result;
  {
    std::vector<float> values;
    std::vector<int> expecteds;

    values.push_back(23.67f);
    expecteds.push_back(24);
    values.push_back(23.50f);
    expecteds.push_back(24);
    values.push_back(23.35f);
    expecteds.push_back(23);
    values.push_back(23.00f);
    expecteds.push_back(23);
    values.push_back(0.00f);
    expecteds.push_back(0);
    values.push_back(-23.00f);
    expecteds.push_back(-23);
    values.push_back(-23.35f);
    expecteds.push_back(-23);
    values.push_back(-23.50f);
    expecteds.push_back(-24);
    values.push_back(-23.67f);
    expecteds.push_back(-24);
    for (size_t i = 0; i < values.size(); ++i)
    {
      result = vtkMath::Round(values[i]);
      if (result != expecteds[i])
      {
        std::cout << " Float Round(" << values[i] << ") got " << result << " but expected "
                  << expecteds[i];
        ++status;
      }
    }
  }
  {
    std::vector<double> values;
    std::vector<int> expecteds;

    values.push_back(23.67);
    expecteds.push_back(24);
    values.push_back(23.50);
    expecteds.push_back(24);
    values.push_back(23.35);
    expecteds.push_back(23);
    values.push_back(23.00);
    expecteds.push_back(23);
    values.push_back(0.00);
    expecteds.push_back(0);
    values.push_back(-23.00);
    expecteds.push_back(-23);
    values.push_back(-23.35);
    expecteds.push_back(-23);
    values.push_back(-23.50);
    expecteds.push_back(-24);