code: def test_logical_with_nas(self):
      d = DataFrame({"a": [np.nan, False], "b": [True, True]})
  
      # GH4947
      # bool comparisons should return bool
      result = d["a"] | d["b"]
      expected = Series([False, True])
      tm.assert_series_equal(result, expected)
  
      # GH4604, automatic casting here
      result = d["a"].fillna(False) | d["b"]
      expected = Series([True, True])
      tm.assert_series_equal(result, expected)
  
      msg = "The 'downcast' keyword in fillna is deprecated"
      with tm.assert_produces_warning(FutureWarning, match=msg):
          result = d["a"].fillna(False, downcast=False) | d["b"]
      expected = Series([True, True])
      tm.assert_series_equal(result, expected)
  
file_path: pandas/pandas/tests/frame/test_logical_ops.py
imports: import operator
  import re
  import numpy
  import pytest
  from pandas import CategoricalIndex, DataFrame, Interval, Series, isnull
  import pandas._testing
label_desc: Use image node_id 7 for calling the TestDataFrameLogicalOperators obj's underlying member method code with example usage: obj.test_logical_with_nas() without return types