code: def test_ufunc():
      assert np.log(NA) is NA
      assert np.add(NA, 1) is NA
      result = np.divmod(NA, 1)
      assert result[0] is NA and result[1] is NA
  
      result = np.frexp(NA)
      assert result[0] is NA and result[1] is NA
  
imports: from datetime import date, time, timedelta
  import pickle
  import numpy
  import pytest
  from pandas._libs.missing import NA
  from pandas.core.dtypes.common import is_scalar
  import pandas
  import pandas._testing
label_desc: Use image node_id 20 for calling a global function with example usage: test_ufunc() without return types