code: def test(self, xp, dtype1, dtype2):
      a = testing.shaped_random((3, 4, 5), xp, dtype1)
      b = testing.shaped_random((6, 7), xp, dtype2)
      return xp.append(a, b)
  
imports: import unittest
  import pytest
  import numpy
  import cupy
  from cupy import testing
label_desc: Use image node_id 1 for calling the TestAppend obj's underlying member method code with example usage: obj.test(xp, dtype1, dtype2) and returns: xp