code: def test_base(self):
      for xp in (numpy, cupy):
          a = xp.zeros((2, 3, 4))
          assert a.flat.base is a
  
imports: import unittest
  import warnings
  import numpy
  import pytest
  import cupy
  from cupy import testing
label_desc: Use image node_id 1 for calling the TestFlatiter obj's underlying member method code with example usage: obj.test_base() without return types