### Question:
EchoReplyInputMessageFactory implements OFSerializer<EchoReplyInput> { @Override public void serialize(EchoReplyInput message, ByteBuf outBuffer) { ByteBufUtils.writeOFHeader(MESSAGE_TYPE, message, outBuffer, EncodeConstants.OFHEADER_SIZE); byte[] data = message.getData(); if (data != null) { outBuffer.writeBytes(data); ByteBufUtils.updateOFHeaderLength(outBuffer); } }  @Override void serialize(EchoReplyInput message, ByteBuf outBuffer);  }### Answer:
@Test public void testV13() throws Exception { EchoReplyInputBuilder erib = new EchoReplyInputBuilder(); BufferHelper.setupHeader(erib, EncodeConstants.OF13_VERSION_ID); EchoReplyInput eri = erib.build(); ByteBuf out = UnpooledByteBufAllocator.DEFAULT.buffer(); echoFactory.serialize(eri, out); BufferHelper.checkHeaderV13(out, ECHO_REPLY_MESSAGE_CODE_TYPE, 8); }
@Test public void testV10() throws Exception { EchoReplyInputBuilder erib = new EchoReplyInputBuilder(); BufferHelper.setupHeader(erib, EncodeConstants.OF10_VERSION_ID); EchoReplyInput eri = erib.build(); ByteBuf out = UnpooledByteBufAllocator.DEFAULT.buffer(); echoFactory.serialize(eri, out); BufferHelper.checkHeaderV10(out, ECHO_REPLY_MESSAGE_CODE_TYPE, 8); }
@Test public void testDataSerialize()throws Exception { byte[] dataToTest = new byte[]{91,92,93,94,95,96,97,98}; EchoReplyInputBuilder erib = new EchoReplyInputBuilder(); BufferHelper.setupHeader(erib, EncodeConstants.OF13_VERSION_ID); erib.setData(dataToTest); EchoReplyInput eri = erib.build(); ByteBuf out = UnpooledByteBufAllocator.DEFAULT.buffer(); echoFactory.serialize(eri, out); BufferHelper.checkHeaderV13(out, ECHO_REPLY_MESSAGE_CODE_TYPE, 8+dataToTest.length); byte[] outData = new byte[dataToTest.length]; out.readBytes(outData); Assert.assertArrayEquals("Wrong - different output data.",dataToTest, outData); out.release(); }