Fix destroy error in test_ProtoServer.

paddle/pserver/test/test_ProtoServer.cpp

@@ -12,14 +12,13 @@ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License. */
 
-#include "paddle/utils/Util.h"
-
 #include <gtest/gtest.h>
-
+#include <memory>
 #include "ParameterService.pb.h"
 #include "paddle/math/Vector.h"
 #include "paddle/pserver/ProtoServer.h"
 #include "paddle/utils/Stat.h"
+#include "paddle/utils/Util.h"
 
 DEFINE_string(server_addr, "127.0.0.1", "Server address");
 DEFINE_int64(dim, 50000000, "Data size");
@@ -163,17 +162,15 @@ int main(int argc, char** argv) {
   paddle::initMain(argc, argv);
   testing::InitGoogleTest(&argc, argv);
 
-  MyServer* server;
+  std::unique_ptr<MyServer> server;
   if (FLAGS_rdma_tcp == "rdma") {
-    server = new MyServer(FLAGS_port, 0);
+    server.reset(new MyServer(FLAGS_port, 0));
   } else {
-    server = new MyServer(FLAGS_port);
+    server.reset(new MyServer(FLAGS_port));
   }
 
   server->start();
   usleep(10000);
 
-  int ret = RUN_ALL_TESTS();
-
-  exit(ret);
+  return RUN_ALL_TESTS();
 }