code: def test_slice_info():
      im4d = Image4d(
          IM.get_fdata(),
          IM.affine,
          tr=3.0,
          slice_times=(0, 1, 2),
          slice_info=(2, -1),
      )
      assert im4d.slice_axis == 2
      assert im4d.slice_direction == -1
  
imports: import warnings
  import nibabel
  import numpy
  import pytest
  from nibabel import io_orientation
  from numpy.testing import assert_array_almost_equal, assert_array_equal
  from ....None import load_image
  from ....core.image.image_spaces import make_xyz_image, xyz_affine
  from ....io.nibcompat import get_header
  from ....testing import funcfile
  from ...slicetiming.timefuncs import st_02413, st_42031, st_43210
  from ..affine import Rigid
  from ..groupwise_registration import FmriRealign4d, Image4d, Realign4d, Realign4dAlgorithm, SpaceRealign, SpaceTimeRealign, make_grid, resample4d
label_desc: Use image node_id 3 for calling a global function with example usage: test_slice_info() without return types