code: def test_astype_dtype(data, expected):
      got = data.astype("category").cat.codes.dtype
      np.testing.assert_equal(got, expected)
  
imports: import operator
  import string
  import warnings
  from contextlib import contextmanager
  from textwrap import dedent
  import numpy
  import pandas
  import pytest
  import cudf
  from cudf.core._compat import PANDAS_GE_134
  from cudf.testing._utils import NUMERIC_TYPES, assert_eq, assert_exceptions_equal, expect_warning_if
label_desc: Use image node_id 29 for calling a global function with example usage: test_astype_dtype(data, expected) without return types