code: def test_astype_nullable_int(dtype):
      arr = pd.array(["1", pd.NA, "3"], dtype=dtype)
  
      result = arr.astype("Int64")
      expected = pd.array([1, pd.NA, 3], dtype="Int64")
      tm.assert_extension_array_equal(result, expected)
  
imports: import operator
  import numpy
  import pytest
  from pandas.compat.pyarrow import pa_version_under12p0
  from pandas.core.dtypes.common import is_dtype_equal
  import pandas
  import pandas._testing
  from pandas.core.arrays.string_arrow import ArrowStringArray, ArrowStringArrayNumpySemantics
label_desc: Use image node_id 24 for calling a global function with example usage: test_astype_nullable_int(dtype) without return types