code: def test_bytes_for_bits_auto():
      M = 128
      expected = [((n - 1) // 8 + 1) * 8 for n in range(M)]
      for n, e in enumerate(expected):
          assert _bytes_for_bits(n) == e, n
  
imports: import logging
  import os
  import sys
  from unittest import mock
  import numpy
  import pyarrow
  import pyarrow.parquet
  import pytest
  from packaging.version import parse
  from pytest_lazyfixture import lazy_fixture
  import ray
  import ray.cloudpickle
  from ray._private.arrow_serialization import _align_bit_offset, _bytes_for_bits, _copy_bitpacked_buffer_if_needed, _copy_buffer_if_needed, _copy_normal_buffer_if_needed, _copy_offsets_buffer_if_needed
  from ray._private.utils import _get_pyarrow_version
  from ray.data.extensions.tensor_extension import ArrowTensorArray, ArrowVariableShapedTensorArray
  from ray.tests.conftest import *
label_desc: Use image node_id 2 for calling a global function with example usage: test_bytes_for_bits_auto() without return types