let
  inherit (import ./default.nix { }) pkgs;
  inherit (pkgs) lib;
  eval =
    module:
    (lib.evalModules {
      modules = [
        module
        ./deployment/application.nix
      ];
    }).config;
in
{
  test-foo = {
    expr =
      let
        example = eval {
          runtime-environments.bar.nixos = {
            module =
              { ... }:
              {
                system.stateVersion = "25.05";
              };
          };
          applications.foo = {
            module =
              { pkgs, ... }:
              {
                environment.systemPackages = [
                  pkgs.hello
                ];
              };
          };
        };
      in
      {
        has-runtime = example.runtime-environments.bar.nixos ? module;
        has-application = example.applications.foo ? module;
      };
    expected = {
      has-runtime = true;
      has-application = true;
    };
  };
}