code: def test_empty(self):
      hdr = self.header_class()
      assert len(hdr.binaryblock) == self.sizeof_hdr
      assert hdr["sizeof_hdr"] == self.sizeof_hdr
      assert np.all(hdr["dim"][1:] == 1)
      assert hdr["dim"][0] == 0
      assert np.all(hdr["pixdim"] == 1)
      assert hdr["datatype"] == 16  # float32
      assert hdr["bitpix"] == 32
  
imports: import itertools
  import logging
  import os
  import pickle
  import re
  from io import BytesIO, StringIO
  import numpy
  import pytest
  from numpy.testing import assert_array_almost_equal, assert_array_equal
  from ..None import imageglobals
  from ..analyze import AnalyzeHeader, AnalyzeImage
  from ..arraywriters import WriterError
  from ..casting import sctypes_aliases
  from ..nifti1 import Nifti1Header
  from ..optpkg import optional_package
  from ..spatialimages import HeaderDataError, HeaderTypeError, supported_np_types
  from ..testing import assert_dt_equal, bytesio_filemap, bytesio_round_trip, data_path, suppress_warnings
  from ..tmpdirs import InTemporaryDirectory
  from .None import test_spatialimages
  from .None import test_wrapstruct
label_desc: Use image node_id 5 for calling the TestAnalyzeHeader obj's underlying member method code with example usage: obj.test_empty() without return types