From 476470daaaf9b9d747d0aa2eafcab1734b4d4de9 Mon Sep 17 00:00:00 2001
From: Charles-hit <56987902+Charles-hit@users.noreply.github.com>
Date: Tue, 13 Sep 2022 20:40:55 +0800
Subject: [PATCH] add unit test for sum higher level op (#45961)

---
 .../fluid/tests/unittests/test_sum_op.py      | 72 +++++++++++++++++++
 1 file changed, 72 insertions(+)

diff --git a/python/paddle/fluid/tests/unittests/test_sum_op.py b/python/paddle/fluid/tests/unittests/test_sum_op.py
index ebf5631fea..c4d7bb7c2b 100644
--- a/python/paddle/fluid/tests/unittests/test_sum_op.py
+++ b/python/paddle/fluid/tests/unittests/test_sum_op.py
@@ -663,6 +663,78 @@ class TestAddNTripleGradCheck(unittest.TestCase):
             self.func(p)
 
 
+class TestSumDoubleGradCheck(unittest.TestCase):
+
+    def sum_wrapper(self, x):
+        return paddle.sum(x[0], axis=1, keepdim=True)
+
+    @prog_scope()
+    def func(self, place):
+        # the shape of input variable should be clearly specified, not inlcude -1.
+        eps = 0.005
+        dtype = np.float32
+
+        data = layers.data('data', [2, 4], False, dtype)
+        data.persistable = True
+        out = paddle.sum(data, axis=1, keepdim=True)
+        data_arr = np.random.uniform(-1, 1, data.shape).astype(dtype)
+
+        gradient_checker.double_grad_check([data],
+                                           out,
+                                           x_init=[data_arr],
+                                           place=place,
+                                           eps=eps)
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
+        gradient_checker.double_grad_check_for_dygraph(self.sum_wrapper, [data],
+                                                       out,
+                                                       x_init=[data_arr],
+                                                       place=place)
+
+    def test_grad(self):
+        paddle.enable_static()
+        places = [fluid.CPUPlace()]
+        if core.is_compiled_with_cuda():
+            places.append(fluid.CUDAPlace(0))
+        for p in places:
+            self.func(p)
+
+
+class TestSumTripleGradCheck(unittest.TestCase):
+
+    def sum_wrapper(self, x):
+        return paddle.sum(x[0], axis=1, keepdim=True)
+
+    @prog_scope()
+    def func(self, place):
+        # the shape of input variable should be clearly specified, not inlcude -1.
+        eps = 0.005
+        dtype = np.float32
+
+        data = layers.data('data', [2, 4], False, dtype)
+        data.persistable = True
+        out = paddle.sum(data, axis=1, keepdim=True)
+        data_arr = np.random.uniform(-1, 1, data.shape).astype(dtype)
+
+        gradient_checker.triple_grad_check([data],
+                                           out,
+                                           x_init=[data_arr],
+                                           place=place,
+                                           eps=eps)
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
+        gradient_checker.triple_grad_check_for_dygraph(self.sum_wrapper, [data],
+                                                       out,
+                                                       x_init=[data_arr],
+                                                       place=place)
+
+    def test_grad(self):
+        paddle.enable_static()
+        places = [fluid.CPUPlace()]
+        if core.is_compiled_with_cuda():
+            places.append(fluid.CUDAPlace(0))
+        for p in places:
+            self.func(p)
+
+
 if __name__ == "__main__":
     enable_static()
     unittest.main()
-- 
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