code: def test_block_sizes(self):
      rows = b'{"a": 1}\n{"a": 2}\n{"a": 3}'
      read_options = ReadOptions()
      parse_options = ParseOptions()
  
      for data in [rows, rows + b"\n"]:
          for newlines_in_values in [False, True]:
              parse_options.newlines_in_values = newlines_in_values
              read_options.block_size = 4
              with pytest.raises(
                  ValueError, match="try to increase block size"
              ):
                  self.read_bytes(
                      data,
                      read_options=read_options,
                      parse_options=parse_options,
                  )
  
              # Validate reader behavior with various block sizes.
              # There used to be bugs in this area.
              for block_size in range(9, 20):
                  read_options.block_size = block_size
                  table = self.read_bytes(
                      data,
                      read_options=read_options,
                      parse_options=parse_options,
                  )
                  assert table.to_pydict() == {"a": [1, 2, 3]}
  
imports: from collections import OrderedDict
  from decimal import Decimal
  import io
  import itertools
  import json
  import string
  import unittest
  import numpy
  import pytest
  import pyarrow
  from pyarrow.json import read_json, ReadOptions, ParseOptions
label_desc: Use image node_id 4 for calling the BaseTestJSONRead obj's underlying member method code with example usage: obj.test_block_sizes() without return types