Skip test if GPU not available

theano/sandbox/cuda/tests/test_gradient.py

@@ -4,6 +4,12 @@ import theano
 from theano import tensor
 from theano.sandbox import cuda
 
+# Skip test if cuda_ndarray is not available.
+from nose.plugins.skip import SkipTest
+import theano.sandbox.cuda as cuda_ndarray
+if cuda_ndarray.cuda_available == False:
+    raise SkipTest('Optional package cuda disabled')
+
 
 class TestGradient(unittest.TestCase):
     verbose = 0