restore test for min,max labels

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

@@ -1465,6 +1465,34 @@ class TestCrossEntropyFAPIError(unittest.TestCase):
 
             self.assertRaises(ValueError, test_WeightLength_NotEqual)
 
+            def test_LabelValue_ExceedMax():
+                input_data = paddle.rand(shape=[20, 100])
+                label_data = paddle.randint(
+                    0, 100, shape=[20, 1], dtype="int64")  # hard label
+                label_data[0] = 100
+                weight_data = paddle.rand([100])  # provide weight
+                paddle.nn.functional.cross_entropy(
+                    input=input_data,
+                    label=label_data,
+                    weight=weight_data,
+                    ignore_index=-100)
+
+            self.assertRaises(ValueError, test_LabelValue_ExceedMax)
+
+            def test_LabelValue_ExceedMin():
+                input_data = paddle.rand(shape=[20, 100])
+                label_data = paddle.randint(
+                    0, 100, shape=[20, 1], dtype="int64")  # hard label
+                label_data[0] = -1
+                weight_data = paddle.rand([100])  # provide weight
+                paddle.nn.functional.cross_entropy(
+                    input=input_data,
+                    label=label_data,
+                    weight=weight_data,
+                    ignore_index=-100)
+
+            self.assertRaises(ValueError, test_LabelValue_ExceedMin)
+
             def static_test_WeightLength_NotEqual():
                 input_np = np.random.random([2, 4]).astype('float32')
                 label_np = np.random.randint(0, 4, size=(2)).astype(np.int64)