diff --git a/java_gen/pre-written/src/test/java/org/projectfloodlight/openflow/types/IPv6Test.java b/java_gen/pre-written/src/test/java/org/projectfloodlight/openflow/types/IPv6Test.java
new file mode 100644
index 0000000..092dacb
--- /dev/null
+++ b/java_gen/pre-written/src/test/java/org/projectfloodlight/openflow/types/IPv6Test.java
@@ -0,0 +1,147 @@
+package org.projectfloodlight.openflow.types;
+
+import static org.junit.Assert.assertArrayEquals;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.fail;
+
+import java.net.Inet6Address;
+import java.net.InetAddress;
+import java.net.UnknownHostException;
+
+import org.jboss.netty.buffer.ChannelBuffers;
+import org.junit.Test;
+import org.projectfloodlight.openflow.exceptions.OFParseError;
+
+public class IPv6Test {
+
+    String[] testStrings = {
+            "::",
+            "::1",
+            "ffe0::",
+            "1:2:3:4:5:6:7:8"
+    };
+
+    String[] ipsWithMask = {
+                            "1::1/80",
+                            "1:2:3:4::/ffff:ffff:ffff:ff00::",
+                            "ffff:ffee:1::/ff00:ff00:ff00:ff00::",
+                            "8:8:8:8:8:8:8:8",
+    };
+
+    byte[][] masks = {
+                    new byte[] { (byte)0xff, (byte)0xff, (byte)0xff, (byte)0xff,
+                                 (byte)0xff, (byte)0xff, (byte)0xff, (byte)0xff,
+                                 (byte)0xff, (byte)0xff, (byte)0x00, (byte)0x00,
+                                 (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00 },
+                    new byte[] { (byte)0xff, (byte)0xff, (byte)0xff, (byte)0xff,
+                                 (byte)0xff, (byte)0xff, (byte)0xff, (byte)0x00,
+                                 (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00,
+                                 (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00 },
+                    new byte[] { (byte)0xff, (byte)0x00, (byte)0xff, (byte)0x00,
+                                 (byte)0xff, (byte)0x00, (byte)0xff, (byte)0x00,
+                                 (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00,
+                                 (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00 },
+                    new byte[] { (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00,
+                                 (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00,
+                                 (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00,
+                                 (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00 }
+    };
+
+    boolean[] hasMask = {
+                         true,
+                         true,
+                         true,
+                         false
+    };
+
+    @Test
+    public void testMasked() throws UnknownHostException {
+        for(int i=0; i < ipsWithMask.length; i++ ) {
+            IPv6WithMask value = IPv6WithMask.of(ipsWithMask[i]);
+            if (!hasMask[i]) {
+                IPv6 ip = value.getValue();
+                InetAddress inetAddress = InetAddress.getByName(ipsWithMask[i]);
+
+                assertArrayEquals(ip.getBytes(), inetAddress.getAddress());
+                assertEquals(ipsWithMask[i], ip.toString());
+            } else if (value instanceof IPv6WithMask && hasMask[i]) {
+                InetAddress inetAddress = InetAddress.getByName(ipsWithMask[i].substring(0, ipsWithMask[i].indexOf('/')));
+
+                byte[] address = inetAddress.getAddress();
+                assertEquals(address.length, value.getValue().getBytes().length);
+
+                for (int j = 0; j < address.length; j++) {
+                    address[j] &= masks[i][j];
+                }
+
+                assertArrayEquals(value.getValue().getBytes(), address);
+                assertArrayEquals(masks[i], value.getMask().getBytes());
+            }
+        }
+    }
+
+
+    @Test
+    public void testOfString() throws UnknownHostException {
+        for(int i=0; i < testStrings.length; i++ ) {
+            IPv6 ip = IPv6.of(testStrings[i]);
+            InetAddress inetAddress = InetAddress.getByName(testStrings[i]);
+
+            assertArrayEquals(ip.getBytes(), inetAddress.getAddress());
+            assertEquals(testStrings[i], ip.toString());
+        }
+    }
+
+    @Test
+    public void testOfByteArray() throws UnknownHostException {
+        for(int i=0; i < testStrings.length; i++ ) {
+            byte[] bytes = Inet6Address.getByName(testStrings[i]).getAddress();
+            IPv6 ip = IPv6.of(bytes);
+            assertEquals(testStrings[i], ip.toString());
+            assertArrayEquals(bytes, ip.getBytes());
+        }
+    }
+
+    @Test
+    public void testReadFrom() throws OFParseError, UnknownHostException {
+        for(int i=0; i < testStrings.length; i++ ) {
+            byte[] bytes = Inet6Address.getByName(testStrings[i]).getAddress();
+            IPv6 ip = IPv6.read16Bytes(ChannelBuffers.copiedBuffer(bytes));
+            assertEquals(testStrings[i], ip.toString());
+            assertArrayEquals(bytes, ip.getBytes());
+        }
+    }
+
+    String[] invalidIPs = {
+            "",
+            ":",
+            "1:2:3:4:5:6:7:8:9",
+            "1:2:3:4:5:6:7:8:",
+            "1:2:3:4:5:6:7:8g",
+            "1:2:3:",
+            "12345::",
+            "1::3::8",
+            "::3::"
+    };
+
+    @Test
+    public void testInvalidIPs() throws OFParseError {
+        for(String invalid : invalidIPs) {
+            try {
+                IPv6.of(invalid);
+                fail("Invalid IP "+invalid+ " should have raised IllegalArgumentException");
+            } catch(IllegalArgumentException e) {
+                // ok
+            }
+        }
+    }
+
+    @Test
+    public void testZeroCompression() throws OFParseError {
+        assertEquals("::", IPv6.of("::").toString(true, false));
+        assertEquals("0:0:0:0:0:0:0:0", IPv6.of("::").toString(false, false));
+        assertEquals("0000:0000:0000:0000:0000:0000:0000:0000", IPv6.of("::").toString(false, true));
+        assertEquals("1::4:5:6:0:8", IPv6.of("1:0:0:4:5:6:0:8").toString(true, false));
+        assertEquals("1:0:0:4::8", IPv6.of("1:0:0:4:0:0:0:8").toString(true, false));
+    }
+}