code: def test_high_is_none(self):
      with mock.patch("cupy.random._sample.randint") as m:
          random.random_integers(3, None)
      m.assert_called_with(1, 4, None)
  
imports: import unittest
  from unittest import mock
  import numpy
  import pytest
  import cupy
  from cupy import cuda
  from cupy.cuda import runtime
  from cupy import random
  from cupy import testing
  from cupy.testing import _condition
  from cupy.testing import _hypothesis
label_desc: Use image node_id 2 for calling the TestRandomIntegers obj's underlying member method code with example usage: obj.test_high_is_none() without return types