code: def test_corner_intersect(
      self, index_flat, fname, sname, expected_name
  ):
      # GH#35847
      # Test intersections with various name combinations
      if not index_flat.is_unique:
          index = index_flat.unique()
      else:
          index = index_flat
  
      # Test copy.intersection(copy)
      first = index.copy().set_names(fname)
      second = index.copy().set_names(sname)
      intersect = first.intersection(second)
      expected = index.copy().set_names(expected_name)
      tm.assert_index_equal(intersect, expected)
  
      # Test copy.intersection(empty)
      first = index.copy().set_names(fname)
      second = index.drop(index).set_names(sname)
      intersect = first.intersection(second)
      expected = index.drop(index).set_names(expected_name)
      tm.assert_index_equal(intersect, expected)
  
      # Test empty.intersection(copy)
      first = index.drop(index).set_names(fname)
      second = index.copy().set_names(sname)
      intersect = first.intersection(second)
      expected = index.drop(index).set_names(expected_name)
      tm.assert_index_equal(intersect, expected)
  
      # Test empty.intersection(empty)
      first = index.drop(index).set_names(fname)
      second = index.drop(index).set_names(sname)
      intersect = first.intersection(second)
      expected = index.drop(index).set_names(expected_name)
      tm.assert_index_equal(intersect, expected)
  
imports: from datetime import datetime
  import operator
  import numpy
  import pytest
  from pandas._libs import lib
  from pandas.core.dtypes.cast import find_common_type
  from pandas import CategoricalDtype, CategoricalIndex, DatetimeTZDtype, Index, MultiIndex, PeriodDtype, RangeIndex, Series, Timestamp
  import pandas._testing
  from pandas.api.types import is_signed_integer_dtype, pandas_dtype
label_desc: Use image node_id 8 for calling the TestSetOps obj's underlying member method code with example usage: obj.test_corner_intersect(index_flat, fname, sname, expected_name) without return types