code: def test_astype_to_datetimelike_unit(
      self, any_real_numpy_dtype, dtype, unit
  ):
      # tests all units from numeric origination
      # GH#19223 / GH#12425
      dtype = f"{dtype}[{unit}]"
      arr = np.array([[1, 2, 3]], dtype=any_real_numpy_dtype)
      df = DataFrame(arr)
      result = df.astype(dtype)
      expected = DataFrame(arr.astype(dtype))
  
      tm.assert_frame_equal(result, 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 22 for calling the TestAstype obj's underlying member method code with example usage: obj.test_astype_to_datetimelike_unit(any_real_numpy_dtype, dtype, unit) without return types