jaberg/Theano — comment on commit 1451d21450be79ee6b55445bf1b60e55888f970a
File: theano/tensor/tests/test_basic.py line 3265
By nouiz:

I looked and we don't have test for sum! We have test for elemwise.CarReduce(add), but not for elemwise.Sum. So this mean the grad is not tested!

I added a ticket in the trac.