code: def test_axis(self, xp):
      a = testing.shaped_random((3, 4, 5), xp, xp.float32)
      b = testing.shaped_random((3, 10, 5), xp, xp.float32)
      return xp.append(a, b, axis=1)
  
imports: import unittest
  import pytest
  import numpy
  import cupy
  from cupy import testing
label_desc: Use image node_id 7 for calling the TestAppend obj's underlying member method code with example usage: obj.test_axis(xp) and returns: xp