nixos/test/networking: test unusual interface names

        machine.fail("ip address show wlan0 | grep -q ${testMac}")

      '';

    };

    naughtyInterfaceNames = let

      ifnames = [

        # flags of ip-address

        "home" "temporary" "optimistic"

        "bridge_slave" "flush"

        # flags of ip-route

        "up" "type" "nomaster" "address"

        # other

        "very_loong_name" "lowerUpper" "-"

      ];

    in {

      name = "naughtyInterfaceNames";

      nodes.machine = { pkgs, ... }: {

        networking.useNetworkd = networkd;

        networking.bridges = listToAttrs

          (flip map ifnames

             (name: { inherit name; value.interfaces = []; }));

      };

      testScript = ''

        machine.start()

        machine.wait_for_unit("network.target")

        for ifname in ${builtins.toJSON ifnames}:

            machine.wait_until_succeeds(f"ip link show dev '{ifname}' | grep -q '{ifname}'")

      '';

    };

    caseSensitiveRenaming = {

      name = "CaseSensitiveRenaming";

      nodes.machine = { pkgs, ... }: {