@Test
    public void unknownField() throws Exception
    {
        byte[] extendedMessage = MsgpackIOUtil.toByteArray(fixtureExtended, EXTENDED_SCHEMA, numeric);

        TestMessage instance = SCHEMA.newMessage();

        // unknown field3
        MsgpackIOUtil.mergeFrom(extendedMessage, instance, SCHEMA, numeric);

        checkKnownFields(instance);

    }
Test for ignoring unknown fields during de-seralization
protostuff-msgpack/src/test/java/io/protostuff/MsgpackUnknownFieldTest.java