### Question:
OxmIpv6NdTllSerializer extends AbstractOxmMacAddressSerializer { @Override protected int getValueLength() { return EncodeConstants.MAC_ADDRESS_LENGTH; }  @Override void serialize(MatchEntry entry, ByteBuf outBuffer);  }### Answer:
@Test public void testGetValueLength() { assertEquals("Wrong value length", EncodeConstants.MAC_ADDRESS_LENGTH, serializer.getValueLength()); }