From 6cd96c19f52f389195e81de71b301a1c274a2664 Mon Sep 17 00:00:00 2001
From: root <12272008@bjtu.edu.cn>
Date: Tue, 27 Apr 2021 06:04:43 +0000
Subject: [PATCH] fix ci coverage

---
 .../fluid/tests/unittests/test_cross_entropy_loss.py     | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/python/paddle/fluid/tests/unittests/test_cross_entropy_loss.py b/python/paddle/fluid/tests/unittests/test_cross_entropy_loss.py
index b30a5227a9a..6a037ad6be7 100644
--- a/python/paddle/fluid/tests/unittests/test_cross_entropy_loss.py
+++ b/python/paddle/fluid/tests/unittests/test_cross_entropy_loss.py
@@ -1377,6 +1377,15 @@ class TestCrossEntropyFAPIError(unittest.TestCase):
 
             self.assertRaises(ValueError, test_LabelValue)
 
+            def test_LabelValueNeg():
+                input_data = paddle.rand(shape=[20, 100])
+                label_data = paddle.randint(0, 100, shape=[5, 1], dtype="int64")
+                label_data[0] = -1
+                paddle.nn.functional.cross_entropy(
+                    input=input_data, label=label_data)
+
+            self.assertRaises(ValueError, test_LabelValueNeg)
+
 
 if __name__ == "__main__":
     unittest.main()
-- 
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