code: def test_test_value_op():
      try:
          prev_value = config.compute_test_value
          config.compute_test_value = "raise"
          x = T.log(np.ones((5, 5)))
          v = op.get_test_value(x)
  
          assert np.allclose(v, np.zeros((5, 5)))
      finally:
          config.compute_test_value = prev_value
  
imports: from __future__ import absolute_import, print_function, division
  import unittest
  from nose.plugins.skip import SkipTest
  import numpy
  import theano
  import theano.gof.op
  from six import string_types
  from theano.gof.type import Type, Generic
  from theano.gof.graph import Apply, Variable
  import theano.tensor
  from theano import scalar
  from theano import shared
label_desc: Use image node_id 6 for calling a global function with example usage: test_test_value_op() without return types