more testing of convgrad

theano/sandbox/test_conv.py

@@ -307,15 +307,15 @@ class TestConvOp(unittest.TestCase):
         bsize = 2
         imgs  = T.dmatrix('imgs')
         kerns = T.dmatrix('kerns')
-    
-        kshps = [(3,3)]
-        for mode in 'valid', 'full':
+        kshps = [(3,3), (5,5), (12,12)]
 
-            # 'full' mode should support kernels bigger than the input
-            if mode == 'full':
-                kshps.append((12,12))
+        for mode in 'valid', 'full':
 
             for imshp in (5,5),(2,5,5),(2,10,10): # (12,10), (3,12,11):
+                # 'full' mode should support kernels bigger than the input
+                if mode == 'valid' and (kshps[0] > imshp[1]):
+                    continue
+
                 visdim = 1 if len(imshp)!=3 else imshp[0]
                 for kshp in kshps:
                     imgvals = N.random.random(N.hstack((bsize,imshp)))