code: def test_too_small_split(self):
      to_write = [(1, b"a")]
      with self.assertRaisesWithPredicateMatch(
          AssertionError, self.TOO_SMALL_SPLIT_ERROR
      ):
          shard_config = shard_utils.ShardConfig(num_shards=2)
          self._write(to_write=to_write, shard_config=shard_config)
          self._write(to_write=to_write)
  
imports: import json
  import os
  from typing import Optional
  from unittest import mock
  from etils import epath
  import tensorflow
  from tensorflow_datasets import testing
  from tensorflow_datasets.core import dataset_utils
  from tensorflow_datasets.core import example_parser
  from tensorflow_datasets.core import file_adapters
  from tensorflow_datasets.core import lazy_imports_lib
  from tensorflow_datasets.core import naming
  from tensorflow_datasets.core import writer
  from tensorflow_datasets.core.utils import shard_utils
  from tensorflow_datasets.core.writer import _ShardSpec
label_desc: Use image node_id 7 for calling the WriterTest obj's underlying member method code with example usage: obj.test_too_small_split() without return types