code: def test_string_deserializer():
      deserializer = StringDeserializer()
  
      result = deserializer.deserialize(
          io.BytesIO(b"[1, 2, 3]"), "application/json"
      )
  
      assert result == "[1, 2, 3]"
  
imports: from __future__ import absolute_import
  import io
  import json
  import numpy
  import pandas
  import pytest
  from sagemaker.deserializers import StringDeserializer, BytesDeserializer, CSVDeserializer, StreamDeserializer, NumpyDeserializer, JSONDeserializer, PandasDeserializer, JSONLinesDeserializer
label_desc: Use image node_id 1 for calling a global function with example usage: test_string_deserializer() without return types