tbd-station-14/Content.IntegrationTests/Tests/DeviceNetwork/DeviceNetworkTestSystem.cs

using Content.Server.DeviceNetwork;
using Content.Server.DeviceNetwork.Components;
using Content.Server.DeviceNetwork.Systems;
using Robust.Shared.GameObjects;
using Robust.Shared.Reflection;

namespace Content.IntegrationTests.Tests.DeviceNetwork
{
    [Reflect(false)]
    public class DeviceNetworkTestSystem : EntitySystem
    {
        public NetworkPayload LastPayload = default;

        public override void Initialize()
        {
            base.Initialize();

            SubscribeLocalEvent<DeviceNetworkComponent, PacketSentEvent>(OnPacketReceived);
        }

        private void OnPacketReceived(EntityUid uid, DeviceNetworkComponent component, PacketSentEvent args)
        {
            LastPayload = args.Data;
        }
    }
}