code: def test_pickle(self, fix, request):
      obj = request.getfixturevalue(fix)
      unpickled = tm.round_trip_pickle(obj)
      tm.assert_sp_array_equal(unpickled, obj)
  
imports: import re
  import numpy
  import pytest
  from pandas._libs.sparse import IntIndex
  import pandas
  from pandas import SparseDtype, isna
  import pandas._testing
  from pandas.core.arrays.sparse import SparseArray
label_desc: Use image node_id 8 for calling the TestSparseArray obj's underlying member method code with example usage: obj.test_pickle(fix, request) without return types