code: def test_astype_empty_constructor_equality(self, dtype):
      # see GH#15524
  
      if dtype not in (
          "S",
          "V",  # poor support (if any) currently
          "M",
          "m",  # Generic timestamps raise a ValueError. Already tested.
      ):
          init_empty = Series([], dtype=dtype)
          as_type_empty = Series([]).astype(dtype)
          tm.assert_series_equal(init_empty, as_type_empty)
  
imports: from datetime import datetime, timedelta
  from importlib import reload
  import string
  import sys
  import numpy
  import pytest
  from pandas._libs.tslibs import iNaT
  import pandas.util._test_decorators
  from pandas import NA, Categorical, CategoricalDtype, DatetimeTZDtype, Index, Interval, NaT, Series, Timedelta, Timestamp, cut, date_range, to_datetime
  import pandas._testing
label_desc: Use image node_id 3 for calling the TestAstype obj's underlying member method code with example usage: obj.test_astype_empty_constructor_equality(dtype) without return types