code: def test_intersect_identical(self, case):
      assert case.intersect(case).equals(case)
      case = case.to_block_index()
      assert case.intersect(case).equals(case)
  
imports: import operator
  import numpy
  import pytest
  import pandas._libs.sparse
  import pandas.util._test_decorators
  from pandas import Series
  import pandas._testing
  from pandas.core.arrays.sparse import BlockIndex, IntIndex, make_sparse_index
label_desc: Use image node_id 3 for calling the TestSparseIndexIntersect obj's underlying member method code with example usage: obj.test_intersect_identical(case) without return types