code: def test_expand_dims1(self, xp):
      a = testing.shaped_arange((2, 3), xp)
      return xp.expand_dims(a, 1)
  
imports: import unittest
  import numpy
  import pytest
  import cupy
  from cupy.cuda import runtime
  from cupy import testing
label_desc: Use image node_id 16 for calling the TestDims obj's underlying member method code with example usage: obj.test_expand_dims1(xp) and returns: xp