let
  inherit (import ../default.nix { }) pkgs inputs;
  inherit (pkgs) lib;
  inherit (lib) mkOption types;
  eval =
    module:
    (lib.evalModules {
      specialArgs = {
        inherit inputs;
      };
      modules = [
        module
        ./data-model.nix
      ];
    }).config;
  nixops4Deployment = inputs.nixops4.modules.nixops4Deployment.default;
in
{
  test-eval = {
    expr =
      let
        fediversity = eval (
          { config, ... }:
          {
            config = {
              resources.nixos = {
                # TODO: consumer = ?
                # TODO: provider = ?
              };
              applications.hello = {
                description = ''Command-line tool that will print "Hello, world!" on the terminal'';
                # TODO: module = ?
                # TODO: config=mapping = ?
              };
              environments.single-nixos-vm = {
                # TODO: resources = ?
                # TODO: resource-mapping = ?
              };
            };
            options = {
              example-configuration = mkOption {
                type = config.configuration;
                readOnly = true;
                default = {
                  enable = true;
                  applications.hello.enable = true;
                };
              };
              example-deployment = mkOption {
                type = nixops4Deployment;
                readOnly = true;
                default = config.environments.single-nixos-vm.deployment config.example-configuration;
              };
            };
          }
        );
      in
      {

      };
    expected =
      {
      };
  };
}