code: def test_categorical_astype_to_int(self, any_int_dtype):
      # GH#39402
  
      df = DataFrame(data={"col1": pd.array([2.0, 1.0, 3.0])})
      df.col1 = df.col1.astype("category")
      df.col1 = df.col1.astype(any_int_dtype)
      expected = DataFrame(
          {"col1": pd.array([2, 1, 3], dtype=any_int_dtype)}
      )
      tm.assert_frame_equal(df, expected)
  
imports: import re
  import numpy
  import pytest
  import pandas.util._test_decorators
  import pandas
  from pandas import Categorical, CategoricalDtype, DataFrame, DatetimeTZDtype, Index, Interval, IntervalDtype, NaT, Series, Timedelta, Timestamp, concat, date_range, option_context
  import pandas._testing
label_desc: Use image node_id 3 for calling the TestAstypeCategorical obj's underlying member method code with example usage: obj.test_categorical_astype_to_int(any_int_dtype) without return types