add split by ref test

python/paddle/fluid/tests/unittests/test_split_op.py

@@ -19,7 +19,6 @@ from op_test import OpTest
 
 class TestSplitOp(OpTest):
     def setUp(self):
-        self.op_type = "split"
         axis = 1
         x = np.random.random((4, 5, 6)).astype('float32')
         out = np.split(x, [2, 3], axis)
@@ -28,6 +27,9 @@ class TestSplitOp(OpTest):
         self.outputs = {'Out': [('out%d' % i, out[i]) \
             for i in xrange(len(out))]}
 
+    def _set_op_type(self):
+        self.op_type = "split"
+
     def test_check_output(self):
         self.check_output()
 
@@ -35,5 +37,10 @@ class TestSplitOp(OpTest):
         self.check_grad(['X'], ['out0', 'out1', 'out2'])
 
 
+class TestSplitByrefOp(OpTest):
+    def _set_op_type(self):
+        self.op_type = "split_byref"
+
+
 if __name__ == '__main__':
     unittest.main()