code: def test_no_device_2(self):
      os.environ[visible] = "-1"
      available = _test_cupy_available(self)
      assert not available
  
imports: import operator
  import os
  import shutil
  import subprocess
  import sys
  import tempfile
  import unittest
  from unittest import mock
  import numpy
  import pytest
  import cupy
  import cupyx
label_desc: Use image node_id 4 for calling the TestNotAvailable obj's underlying member method code with example usage: obj.test_no_device_2() without return types