code: def test_atleast_3d1(self, xp):
      return self.check_atleast(xp.atleast_3d, xp)
  
imports: import unittest
  import numpy
  import pytest
  import cupy
  from cupy.cuda import runtime
  from cupy import testing
label_desc: Use image node_id 6 for calling the TestDims obj's underlying member method code with example usage: obj.test_atleast_3d1(xp) and returns: self