text: import pytest
  
  from eth._utils.numeric import (
      get_highest_bit_index,
  )
  
  
  @pytest.mark.parametrize(
      'value,expected',
      (
          (1, 0),
          (2, 1),
          (3, 1),
          (255, 7),
          (256, 8),
      )
  )
  def test_get_highest_bit_index(value, expected):
      actual = get_highest_bit_index(value)
      assert actual == expected
  