WIP: test: Set up service tests

checks/default.nix

@@ -6,6 +6,8 @@ let
 in
 {
   x86_64-linux = lib.mergeAttrsList [
+    flake-inputs.self.nixosConfigurations.hetzner-1.config.serviceTests
+
     {
       nix = checkLib.mkLint {
         name = "nix-lints";

configuration/default.nix

@@ -11,7 +11,7 @@
     flake-inputs.tlaternet-webserver.nixosModules.default
 
     "${modulesPath}/profiles/minimal.nix"
-    (import ../modules)
+    ../modules
 
     ./services/backups.nix
     ./services/battery-manager.nix

modules/default.nix

@@ -1 +1,6 @@
-{ imports = [ ./crowdsec ]; }
+{
+  imports = [
+    ./crowdsec
+    ./serviceTests.nix
+  ];
+}

modules/serviceTests.nix

@@ -0,0 +1,20 @@
+/**
+  Module to make writing service-specific tests easy.
+*/
+{ lib, ... }:
+let
+  inherit (lib) mkOption types;
+in
+{
+  options = {
+    serviceTests = mkOption {
+      type = types.attrsOf types.package;
+
+      description = ''
+        NixOS tests to run.
+      '';
+
+      default = { };
+    };
+  };
+}