code: def test_inference_on_pandas_objects(self):
      # GH#56012
      idx = Index([pd.Timestamp("2019-12-31")], dtype=object)
      with tm.assert_produces_warning(
          FutureWarning, match="Dtype inference"
      ):
          result = Index(idx)
      assert result.dtype != np.object_
  
      ser = Series([pd.Timestamp("2019-12-31")], dtype=object)
  
      with tm.assert_produces_warning(
          FutureWarning, match="Dtype inference"
      ):
          result = Index(ser)
      assert result.dtype != np.object_
  
file_path: pandas/pandas/tests/indexes/base_class/test_constructors.py
imports: import numpy
  import pytest
  import pandas
  from pandas import Index, MultiIndex, Series
  import pandas._testing
label_desc: Use image node_id 6 for calling the TestIndexConstructor obj's underlying member method code with example usage: obj.test_inference_on_pandas_objects() without return types