【Hackathon 5th No.11】add gammaincc and gammainc API

test/legacy_test/test_igamma_op.py

@@ -106,12 +106,34 @@ def test_a_le_zero_error(self):
         self.assertRaises(ValueError, paddle.igamma, x, a)
         paddle.enable_static()
 
+    def test_dtype_error(self):
+        paddle.enable_static()
+        # in static graph mode
+        with self.assertRaises(TypeError):
+            with paddle.static.program_guard(paddle.static.Program()):
+                x = paddle.static.data(
+                    name="x", shape=self.shape, dtype="int32"
+                )
+                a = paddle.static.data(
+                    name="a", shape=self.shape, dtype="int32"
+                )
+                out = paddle.igamma(x, a)
+
+        paddle.disable_static()
+        # in dynamic mode
+        with self.assertRaises(RuntimeError):
+            with paddle.base.dygraph.guard():
+                x = paddle.to_tensor(self.x_np, dtype="int32")
+                a = paddle.to_tensor(self.a_np, dtype="int32")
+                res = paddle.igamma(x, a)
+
+        paddle.enable_static()
+
 
 class TestIgammaOpFp32Api(TestIgammaOpApi):
     def init_dtype_type(self):
         self.dtype = "float32"
 
 
 if __name__ == "__main__":
-    paddle.enable_static()
     unittest.main()