"add python test"

python/paddle/v2/framework/tests/test_rowwise_add_op.py

 import unittest
-from op_test_util import OpTestMeta
 import numpy as np
+from op_test_util import OpTestMeta
+from gradient_checker import GradientChecker, create_op
 
 
 class TestRowwiseAddOp(unittest.TestCase):
@@ -15,6 +16,16 @@ class TestRowwiseAddOp(unittest.TestCase):
         self.outputs = {'Out': np.add(self.inputs['X'], self.inputs['b'])}
 
 
+class RowwiseAddGradOpTest(GradientChecker):
+    def test_rowwise_add(self):
+        op = create_op("rowwise_add")
+        inputs = {
+            "X": np.random.uniform(0.1, 1, [10, 10]).astype("float32"),
+            "b": np.random.uniform(0.1, 1, [10, 1]).astype("float32")
+        }
+        self.check_grad(op, inputs, set("X", "b"), "Out")
+
+
 #TODO(dzh): rowwise_grad check
 
 if __name__ == '__main__':