code: def test_pack_unpack_order(self):
      for bo in ["big", "little"]:
          self.check_unpackbits([], bitorder=bo)
          self.check_unpackbits([0], bitorder=bo)
          self.check_unpackbits([1], bitorder=bo)
          self.check_unpackbits([255], bitorder=bo)
          self.check_unpackbits([100, 200, 123, 213], bitorder=bo)
  
file_path: cupy/tests/cupy_tests/binary_tests/test_packing.py
imports: import numpy
  import unittest
  import pytest
  import cupy
  from cupy import testing
label_desc: Use image node_id 10 for calling the TestPacking obj's underlying member method code with example usage: obj.test_pack_unpack_order() without return types