Method SetUp

cpp/src/arrow/array/array_test.cc:4028–4053

class TestArrayDataStatistics : public ::testing::Test {
 public:
  void SetUp() {
    valids_ = {1, 0, 1, 1};
    row_count_ = static_cast<int64_t>(valids_.size());
    null_count_ = std::count(valids_.begin(), valids_.end(), 0);
    distinct_count_ = 3.0;
    max_byte_width_ = 4.0;
    average_byte_width_ = 4.0;
    null_buffer_ = *internal::BytesToBits(valids_);
    values_ = {1, 0, 3, -4};
    min_ = *std::min_element(values_.begin(), values_.end());
    max_ = *std::max_element(values_.begin(), values_.end());
    values_buffer_ = Buffer::FromVector(values_);
    data_ = ArrayData::Make(int32(), values_.size(), {null_buffer_, values_buffer_},
                            null_count_);
    data_->statistics = std::make_shared<ArrayStatistics>();
    data_->statistics->row_count = row_count_;
    data_->statistics->null_count = null_count_;
    data_->statistics->distinct_count = distinct_count_;
    data_->statistics->max_byte_width = max_byte_width_;
    data_->statistics->average_byte_width = average_byte_width_;
    data_->statistics->is_average_byte_width_exact = true;
    data_->statistics->min = min_;
    data_->statistics->is_min_exact = true;
    data_->statistics->max = max_;
    data_->statistics->is_max_exact = true;
  }

 protected:
  std::vector<uint8_t> valids_;