code: def test_unavailable(self):
      with self.assertRaises(RuntimeError):
          function_hooks.CUDAProfileHook()
  
imports: import unittest
  import mock
  import numpy
  import chainer
  from chainer.backends import cuda
  from chainer import function_hooks
  from chainer import testing
  from chainer.testing import attr
label_desc: Use image node_id 3 for calling the TestCUDAProfileHookNVTXUnavailable obj's underlying member method code with example usage: obj.test_unavailable() without return types