Make Usmm test faster and remove deprecated warning.

theano/sparse/tests/test_basic.py

@@ -613,9 +613,10 @@ class DotTests(unittest.TestCase):
 
 
 class UsmmTests(unittest.TestCase):
+    """ Test the Usmm and UsmmCscDense class and related optimization """
     def setUp(self):
-        x_size = (10, 200)
-        y_size = (200, 2000)
+        x_size = (10, 100)
+        y_size = (100, 200)
         z_size = (x_size[0], y_size[1])
 
         self.x = numpy.asarray(numpy.random.binomial(1, 0.5, x_size), dtype=theano.config.floatX)
@@ -639,9 +640,7 @@ class UsmmTests(unittest.TestCase):
             x = mat(format1, 'x', dtype1)
             y = mat(format2, 'y', dtype2)
             a = theano.tensor.scalar('a', dtype=dtype3)
-            z = theano.tensor.shared(
-                numpy.asarray(self.z, dtype=dtype4).copy()
-            )
+            z = theano.shared(numpy.asarray(self.z, dtype=dtype4).copy())
 
             f_b = lambda z, a, x, y: z - a * (x * y)
             x_data = numpy.asarray(self.x, dtype=dtype1)