code: def test_no_cudnn_available(self):
      with chainer.using_config("use_cudnn", "always"):
          self.assertFalse(chainer.should_use_cudnn("==always"))
          self.assertFalse(chainer.should_use_cudnn(">=auto"))
  
file_path: chainer/tests/chainer_tests/test_init.py
imports: import unittest
  import numpy
  import chainer
  from chainer.backends import cuda
  from chainer import testing
  from chainer.testing import attr
label_desc: Use image node_id 2 for calling the TestUseCuDNN obj's underlying member method code with example usage: obj.test_no_cudnn_available() without return types