code: def test_infer_problem_type_ninf(self):
      with self.assertRaises(ValueError):
          infer_problem_type(pd.Series([np.NINF]))
  
imports: import unittest
  import numpy
  import pandas
  import pytest
  from autogluon.core.constants import BINARY, MULTICLASS, MULTICLASS_UPPER_LIMIT, REGRESSION
  from autogluon.core.utils import infer_problem_type
  from autogluon.core.utils.utils import generate_train_test_split
label_desc: Use image node_id 4 for calling the TestInferProblemType obj's underlying member method code with example usage: obj.test_infer_problem_type_ninf() without return types