mqute-codec 0.4.2

A full-featured implementation of MQTT protocol serialization in Rust, supporting versions 3.1, 3.1.1 and 5.0.
Documentation 
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//! # PubComp Packet V4
//!
//! This module defines the `PubComp` packet, which is used in the MQTT protocol to acknowledge
//! the completion of a QoS 2 message flow. The `PubComp` packet contains a packet ID to match it
//! with the corresponding `PubRel` packet.

use super::util;
use crate::protocol::{PacketType, traits};

// Defines the `PubComp` packet for MQTT V4
util::id_packet!(PubComp);

// Implement the `Decode` trait for `PubComp`.
util::id_packet_decode_impl!(PubComp, PacketType::PubComp);

// Implement the `Encode` trait for `PubComp`.
util::id_packet_encode_impl!(PubComp, PacketType::PubComp);

impl traits::PubComp for PubComp {}

#[cfg(test)]
mod tests {
    use super::*;
    use crate::codec::PacketCodec;
    use crate::codec::{Decode, Encode};
    use bytes::BytesMut;
    use tokio_util::codec::Decoder;

    #[test]
    fn pubrel_decode() {
        let mut codec = PacketCodec::new(None, None);

        let data = &[
            (PacketType::PubComp as u8) << 4, // Packet type
            0x02,                             // Remaining len
            0x12,                             // Packet ID
            0x34,
        ];

        let mut stream = BytesMut::new();

        stream.extend_from_slice(&data[..]);

        let raw_packet = codec.decode(&mut stream).unwrap().unwrap();
        let packet = PubComp::decode(raw_packet).unwrap();

        assert_eq!(packet, PubComp::new(0x1234));
    }

    #[test]
    fn pubrel_encode() {
        let packet = PubComp::new(0x1234);

        let mut stream = BytesMut::new();
        packet.encode(&mut stream).unwrap();
        assert_eq!(
            stream,
            vec![(PacketType::PubComp as u8) << 4, 0x02, 0x12, 0x34]
        );
    }
}