Function AssertIndexByteWidth

cpp/src/arrow/array/array_dict_test.cc:1017–1026

template <typename IndexType, typename ValueType>
void AssertIndexByteWidth(const std::shared_ptr<DataType>& value_type =
                              TypeTraits<ValueType>::type_singleton()) {
  auto index_type = TypeTraits<IndexType>::type_singleton();
  auto dict_type =
      checked_pointer_cast<DictionaryType>(dictionary(index_type, value_type));
  std::unique_ptr<ArrayBuilder> builder;
  ASSERT_OK(MakeBuilder(default_memory_pool(), dict_type, &builder));
  auto builder_dict_type = checked_pointer_cast<DictionaryType>(builder->type());
  AssertTypeEqual(dict_type->index_type(), builder_dict_type->index_type());
}

typedef ::testing::Types<Int8Type, Int16Type, Int32Type, Int64Type> IndexTypes;