[Test] fix tests failure in debugmode.

theano/gof/tests/test_op.py

@@ -44,6 +44,14 @@ class MyType(Type):
             raise ValueError("Invalid value")
         return x
 
+    # Added to make those tests pass in DebugMode
+    @staticmethod
+    def may_share_memory(a, b):
+        # As this represent a string and string are immutable, they
+        # never share memory in the DebugMode sence. This is needed as
+        # Python reuse string internally.
+        return False
+
 
 class MyOp(Op):
 

theano/tests/test_tutorial.py

@@ -64,6 +64,11 @@ class T_extending(unittest.TestCase):
             def values_eq_approx(self, x, y, tolerance=1e-4):
                 return abs(x - y) / (abs(x) + abs(y)) < tolerance
 
+            # Added to make those tests pass in DebugMode
+            @staticmethod
+            def may_share_memory(a, b):
+                return a is b
+
         double = Double()
 
 
@@ -87,6 +92,11 @@ class T_extending(unittest.TestCase):
             def __str__(self):
                 return "double"
 
+            # Added to make those tests pass in DebugMode
+            @staticmethod
+            def may_share_memory(a, b):
+                return a is b
+
         double = Double()
 
 
@@ -194,6 +204,11 @@ class T_extending(unittest.TestCase):
             def __str__(self):
                 return "double"
 
+            # Added to make those tests pass in DebugMode
+            @staticmethod
+            def may_share_memory(a, b):
+                return a is b
+
         double = Double()
 
         class BinaryDoubleOp(gof.Op):
@@ -341,6 +356,11 @@ class T_extending(unittest.TestCase):
             def c_cleanup(self, name, sub):
                 return ""
 
+            # Added to make those tests pass in DebugMode
+            @staticmethod
+            def may_share_memory(a, b):
+                return a is b
+
         double = Double()