expectedFailure_fast decorator added

theano/gof/utils.py

@@ -2,6 +2,7 @@
 import linecache
 import sys
 import traceback
+import unittest
 
 import numpy as np
 from six import iteritems, integer_types, string_types, with_metaclass
@@ -11,6 +12,13 @@
 from theano.compat import PY3
 
 
+def expectedFailure_fast():
+    """a Decorator to handle the test cases that are failing when
+    THEANO_FALGS = cycle_detection='fast'.
+    """
+    return unittest.expectedFailure if config.cycle_detection == 'fast' else lambda x: x
+
+
 def simple_extract_stack(f=None, limit=None, skips=[]):
     """This is traceback.extract_stack from python 2.7 with this change: