code: def test_csv_serializer_csv_reader(csv_serializer):
      csv_file_path = os.path.join(DATA_DIR, "with_integers.csv")
      with open(csv_file_path) as csv_file:
          validation_data = csv_file.read()
          csv_file.seek(0)
          result = csv_serializer.serialize(csv_file)
          assert result == validation_data
  
imports: from __future__ import absolute_import
  import io
  import json
  import os
  import numpy
  import pytest
  import scipy.sparse
  from sagemaker.serializers import CSVSerializer, NumpySerializer, JSONSerializer, IdentitySerializer, SparseMatrixSerializer, JSONLinesSerializer, LibSVMSerializer, DataSerializer
  from tests.unit import DATA_DIR
label_desc: Use image node_id 11 for calling a global function with example usage: test_csv_serializer_csv_reader(csv_serializer) without return types