code: def test_equality_numpy(self):
      testing.assert_array_less(self.x, self.y)
  
imports: import copy
  import unittest
  import numpy
  import cupy
  from cupy import testing
label_desc: Use image node_id 2 for calling the TestLessAssertion obj's underlying member method code with example usage: obj.test_equality_numpy() without return types