code: def test_astype_more(self, arr, dtype, expected):
      result = arr.astype(arr.dtype.update_dtype(dtype))
      tm.assert_sp_array_equal(result, expected)
  
file_path: pandas/pandas/tests/arrays/sparse/test_astype.py
imports: import numpy
  import pytest
  from pandas._libs.sparse import IntIndex
  from pandas import SparseDtype, Timestamp
  import pandas._testing
  from pandas.core.arrays.sparse import SparseArray
label_desc: Use image node_id 4 for calling the TestAstype obj's underlying member method code with example usage: obj.test_astype_more(arr, dtype, expected) without return types