--- /dev/null	2019-04-23 10:14:30.487678946 +0100
+++ new/test/jdk/java/net/DatagramSocketImpl/TestImplSpec.java	2019-05-27 11:34:01.429804453 +0100
@@ -0,0 +1,113 @@
+/*
+ * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8224477
+ * @summary Basic test for java.net.DatagramSocketImpl implSpec
+ * @run testng TestImplSpec
+ */
+
+import java.io.IOException;
+import java.net.DatagramPacket;
+import java.net.DatagramSocketImpl;
+import java.net.InetAddress;
+import java.net.NetworkInterface;
+import java.net.SocketAddress;
+import java.net.SocketOption;
+import java.util.Set;
+import org.testng.annotations.Test;
+import static java.lang.Boolean.*;
+import static java.net.StandardSocketOptions.*;
+import static org.testng.Assert.assertEquals;
+import static org.testng.Assert.expectThrows;
+
+public class TestImplSpec {
+
+    static final Class<UnsupportedOperationException> UOE = UnsupportedOperationException.class;
+
+    @Test
+    public void socketImpl() {
+        DelegatingDatagramSocketImpl dsi = new DelegatingDatagramSocketImpl();
+
+        assertEquals(dsi.supportedOptions().size(), 0);
+
+        expectThrows(UOE, () -> dsi.setOption(null, null));
+        expectThrows(UOE, () -> dsi.setOption(null, 1));
+        expectThrows(UOE, () -> dsi.setOption(SO_RCVBUF, 100));
+        expectThrows(UOE, () -> dsi.setOption(SO_KEEPALIVE, TRUE));
+        expectThrows(UOE, () -> dsi.setOption(SO_KEEPALIVE, FALSE));
+        expectThrows(UOE, () -> dsi.setOption(FAKE_SOCK_OPT, TRUE));
+        expectThrows(UOE, () -> dsi.setOption(FAKE_SOCK_OPT, FALSE));
+        expectThrows(UOE, () -> dsi.setOption(SO_KEEPALIVE, TRUE));
+
+        expectThrows(UOE, () -> dsi.getOption(null));
+        expectThrows(UOE, () -> dsi.getOption(SO_RCVBUF));
+        expectThrows(UOE, () -> dsi.getOption(SO_KEEPALIVE));
+        expectThrows(UOE, () -> dsi.getOption(FAKE_SOCK_OPT));
+    }
+
+    static final SocketOption<Boolean> FAKE_SOCK_OPT = new SocketOption<>() {
+        @Override public String name() { return "FAKE_SOCK_OPT"; }
+        @Override public Class<Boolean> type() { return Boolean.class; }
+    };
+
+    // A DatagramSocketImpl that delegates the three new-style socket option
+    // methods to the default java.net.DatagramSocketImpl implementation.
+    static class DelegatingDatagramSocketImpl extends DatagramSocketImpl {
+
+        @Override
+        public <T> void setOption(SocketOption<T> name, T value) throws IOException {
+            super.setOption(name, value);
+        }
+
+        @Override
+        public Set<SocketOption<?>> supportedOptions() {
+            return super.supportedOptions();
+        }
+
+        @Override
+        public <T> T getOption(SocketOption<T> name) throws IOException {
+            return super.getOption(name);
+        }
+
+        // --
+        @Override protected void create() { }
+        @Override protected void bind(int lport, InetAddress laddr) { }
+        @Override protected void send(DatagramPacket p) { }
+        @Override protected int peek(InetAddress i) { return 0; }
+        @Override protected int peekData(DatagramPacket p) { return 0; }
+        @Override protected void receive(DatagramPacket p) { }
+        @Override protected void setTTL(byte ttl) { }
+        @Override protected byte getTTL() { return 0; }
+        @Override protected void setTimeToLive(int ttl) { }
+        @Override protected int getTimeToLive() { return 0; }
+        @Override protected void join(InetAddress inetaddr) { }
+        @Override protected void leave(InetAddress inetaddr)  { }
+        @Override protected void joinGroup(SocketAddress mcastaddr, NetworkInterface netIf) { }
+        @Override protected void leaveGroup(SocketAddress mcastaddr, NetworkInterface netIf) { }
+        @Override protected void close() { }
+        @Override public void setOption(int optID, Object value) { }
+        @Override public Object getOption(int optID) { return null; }
+    }
+}