code: def test_intersection_nosort(self):
      result = Index(["c", "b", "a"]).intersection(["b", "a"])
      expected = Index(["b", "a"])
      tm.assert_index_equal(result, expected)
  
imports: from datetime import datetime
  import numpy
  import pytest
  import pandas
  from pandas import Index, Series
  import pandas._testing
  from pandas.core.algorithms import safe_sort
label_desc: Use image node_id 10 for calling the TestIndexSetOps obj's underlying member method code with example usage: obj.test_intersection_nosort() without return types