fix RM test

unit_tests/operator/Test_ReduceMeanImpl.cpp

@@ -207,12 +207,12 @@ TEST_CASE("[cpu/operator] ReduceMean(forward)", "[ReduceMean][CPU]") {
                 }
             });
 
-            std::shared_ptr<Node> myReduceSum = ReduceSum({}, 0, 1);
-            auto op = std::static_pointer_cast<OperatorTensor>(myReduceSum -> getOperator());
+            std::shared_ptr<Node> myReduceMean = ReduceMean({}, 0, 1);
+            auto op = std::static_pointer_cast<OperatorTensor>(myReduceMean -> getOperator());
             op->associateInput(0,myInput);
             op->setDataType(DataType::Float32);
             op->setBackend("cpu");
-            myReduceSum->forward();
+            myReduceMean->forward();
             op->getOutput(0)->print();
 
             REQUIRE(*(op->getOutput(0)) == *myInput);