code: def test_invalid(self):
      eps = -0.1
      if chainer.backends.cuda.libcudnn.get_build_version() < 7500:
          eps = 2e-6
      with self.assertRaises(RuntimeError):
          functions.batch_normalization(*self.args, eps=eps)
  
imports: import unittest
  import warnings
  import numpy
  import six
  import chainer
  from chainer.backends import cuda
  from chainer import functions
  from chainer import gradient_check
  from chainer import testing
  from chainer.testing import attr
  from chainer.testing import backend
label_desc: Use image node_id 3 for calling the TestBatchNormalizationCudnnEps obj's underlying member method code with example usage: obj.test_invalid() without return types