code: def test_json_serializer_numpy_valid(json_serializer):
      result = json_serializer.serialize(np.array([1, 2, 3]))
  
      assert result == "[1, 2, 3]"
  
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 24 for calling a global function with example usage: test_json_serializer_numpy_valid(json_serializer) without return types