code: def test_outer(self, xp, dtype):
      a = testing.shaped_arange((5,), xp, dtype)
      b = testing.shaped_arange((4,), xp, dtype)
      return xp.outer(a, b)
  
imports: import unittest
  import numpy
  import pytest
  import cupy
  from cupy import testing
label_desc: Use image node_id 17 for calling the TestProduct obj's underlying member method code with example usage: obj.test_outer(xp, dtype) and returns: xp