Function CheckSliceApproxEquals

cpp/src/arrow/array/array_test.cc:2211–2239

template <typename TYPE>
void CheckSliceApproxEquals() {
  using T = typename TYPE::c_type;

  const int64_t kSize = 50;
  std::vector<T> draws1;
  std::vector<T> draws2;

  const uint32_t kSeed = 0;
  random_real(kSize, kSeed, 0.0, 100.0, &draws1);
  random_real(kSize, kSeed + 1, 0.0, 100.0, &draws2);

  // Make the draws equal in the sliced segment, but unequal elsewhere (to
  // catch not using the slice offset)
  for (int64_t i = 10; i < 30; ++i) {
    draws2[i] = draws1[i];
  }

  std::vector<bool> is_valid;
  random_is_valid(kSize, 0.1, &is_valid);

  std::shared_ptr<Array> array1, array2;
  ArrayFromVector<TYPE, T>(is_valid, draws1, &array1);
  ArrayFromVector<TYPE, T>(is_valid, draws2, &array2);

  std::shared_ptr<Array> slice1 = array1->Slice(10, 20);
  std::shared_ptr<Array> slice2 = array2->Slice(10, 20);

  ASSERT_TRUE(slice1->ApproxEquals(slice2));
}

template <typename ArrowType>
using NumericArgType = std::conditional_t<is_half_float_type<ArrowType>::value, Float16,