code: def test_stack_with_axis_value(self):
      a = testing.shaped_arange((2, 3), cupy)
      s = cupy.stack((a, a), axis=1)
  
      assert s.shape == (2, 2, 3)
      cupy.testing.assert_array_equal(s[:, 0, :], a)
      cupy.testing.assert_array_equal(s[:, 1, :], a)
  
imports: import numpy
  import pytest
  import cupy
  from cupy import testing
  from cupy import cuda
label_desc: Use image node_id 48 for calling the TestJoin obj's underlying member method code with example usage: obj.test_stack_with_axis_value() without return types