using NATS.Server.Mqtt;

namespace NATS.Server.Tests.Mqtt;

public class MqttPacketParserTests
{
    [Fact]
    public void Connect_packet_fixed_header_and_remaining_length_parse_correctly()
    {
        var packet = MqttPacketReader.Read(ConnectPacketBytes.Sample);
        packet.Type.ShouldBe(MqttControlPacketType.Connect);
        packet.RemainingLength.ShouldBe(12);
        packet.Payload.Length.ShouldBe(12);
    }

    private static class ConnectPacketBytes
    {
        public static readonly byte[] Sample =
        [
            0x10, 0x0C, // CONNECT + remaining length
            0x00, 0x04, (byte)'M', (byte)'Q', (byte)'T', (byte)'T',
            0x04, 0x02, 0x00, 0x3C, // protocol level/flags/keepalive
            0x00, 0x00, // empty client id
        ];
    }
}