Missed SocketUtil.java

test/one/nio/net/SocketUtil.java

@@ -0,0 +1,29 @@
+/*
+ * Copyright 2019 Odnoklassniki Ltd, Mail.Ru Group
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * 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.
+ */
+
+package one.nio.net;
+
+import java.io.IOException;
+import java.net.ServerSocket;
+
+public class SocketUtil {
+
+    public static int getFreePort() throws IOException {
+        try (ServerSocket serverSocket = new ServerSocket(0)) {
+            return serverSocket.getLocalPort();
+        }
+    }
+}