Tell with Op R_Op impl are not tested.

theano/tensor/tests/test_rop.py

@@ -13,30 +13,33 @@ ops without:
     Prod
     MulwithoutZeros
     ProdWithoutZeros
-
+    CAReduce(for max,... done for MaxAndArgmax op)
 
 list of ops that support R-op:
+ * with test
+    * SpecifyShape
+    * MaxAndArgmax
+    * Subtensor
+    * IncSubtensor set_subtensor too
     * Alloc
+    * Dot
+    * Elemwise
+    * Sum
+    * Softmax
+    * Shape
+    * Join
+
+ * without test
     * Split
     * ARange
     * ScalarFromTensor
-    * Shape
-    * SpecifyShape
-    * MaxAndArgmax
-    * Subtensor
-    * IncSubtensor
     * Rebroadcast
-    * Join
     * Reshape
     * Flatten
     * AdvancedSubtensor1
     * AdvancedIncSubtensor1
     * AdvancedIncSubtensor
-    * Dot
     * DimShuffle
-    * Elemwise
-    * Sum
-    * Softmax
     * Scan