nixpkgs/nixos/tests/watchdogd.nix

{ lib, ... }:
{
  name = "watchdogd";
  meta.maintainers = with lib.maintainers; [ vifino ];

  nodes.machine =
    { pkgs, ... }:
    {
      virtualisation.qemu.options = [
        "-device i6300esb" # virtual watchdog timer
      ];
      boot.kernelModules = [ "i6300esb" ];
      services.watchdogd.enable = true;
      services.watchdogd.settings = {
        supervisor.enabled = true;
      };
    };

  testScript = ''
    machine.wait_for_unit("watchdogd.service")

    assert "i6300ESB" in machine.succeed("watchdogctl status")
    machine.succeed("watchdogctl test")
  '';
}