let
  mkTest =
    { useNftables }:
    import ./make-test-python.nix (
      { pkgs, lib, ... }:
      {
        name = "keepalived-${if useNftables then "nftables" else "iptables"}";
        meta.maintainers = [ lib.maintainers.raitobezarius ];

        nodes = {
          node1 =
            { pkgs, ... }:
            {
              networking.nftables.enable = useNftables;
              services.keepalived.enable = true;
              services.keepalived.openFirewall = true;
              services.keepalived.vrrpInstances.test = {
                interface = "eth1";
                state = "MASTER";
                priority = 50;
                virtualIps = [ { addr = "192.168.1.200"; } ];
                virtualRouterId = 1;
              };
              environment.systemPackages = [ pkgs.tcpdump ];
            };
          node2 =
            { pkgs, ... }:
            {
              networking.nftables.enable = useNftables;
              services.keepalived.enable = true;
              services.keepalived.openFirewall = true;
              services.keepalived.vrrpInstances.test = {
                interface = "eth1";
                state = "MASTER";
                priority = 100;
                virtualIps = [ { addr = "192.168.1.200"; } ];
                virtualRouterId = 1;
              };
              environment.systemPackages = [ pkgs.tcpdump ];
            };
        };

        testScript = ''
          # wait for boot time delay to pass
          for node in [node1, node2]:
              node.wait_until_succeeds(
                "systemctl show -p LastTriggerUSecMonotonic keepalived-boot-delay.timer | grep -vq 'LastTriggerUSecMonotonic=0'"
              )
              node.wait_for_unit("keepalived")
          node2.wait_until_succeeds("ip addr show dev eth1 | grep -q 192.168.1.200")
          node1.fail("ip addr show dev eth1 | grep -q 192.168.1.200")
          node1.succeed("ping -c1 192.168.1.200")
        '';
      }
    );
in
{
  nftables = mkTest { useNftables = true; };
  iptables = mkTest { useNftables = false; };
}