code: def test_dstack_single_element_3(self, xp):
      a = testing.shaped_arange((1,), xp)
      return xp.dstack((a,))
  
imports: import numpy
  import pytest
  import cupy
  from cupy import testing
  from cupy import cuda
label_desc: Use image node_id 32 for calling the TestJoin obj's underlying member method code with example usage: obj.test_dstack_single_element_3(xp) and returns: xp