testing infer_shape: Op TensorFromScalar

theano/tensor/basic.py

@@ -1881,6 +1881,9 @@ class TensorFromScalar(Op):
         out, = out_
         out[0] = numpy.asarray(s)
 
+    def infer_shape(self, node, in_shapes):
+        return [()]
+
     def grad(self, inp, grads):
         s, = inp
         dt, = grads

theano/tensor/tests/test_basic.py

@@ -6148,6 +6148,13 @@ class TestInferShape(utt.InferShapeTester):
                                 [45], ScalarFromTensor,
                                 excluding=["local_tensor_scalar_tensor"])
 
+        # TensorFromScalar:
+        aiscal = scal.float64()
+
+        self._compile_and_check([aiscal],
+                                [TensorFromScalar()(aiscal)],
+                        [4.], TensorFromScalar)
+
 if __name__ == '__main__':
 
     t = TestInferShape('setUp')