Tests(inventoryStore): add tests for intersecting nix/json lists

pkgs/clan-cli/clan_lib/persist/fixtures/lists.json

@@ -0,0 +1 @@
+{}

pkgs/clan-cli/clan_lib/persist/fixtures/lists.nix

@@ -0,0 +1,32 @@
+{ clanLib, lib, ... }:
+let
+  eval = lib.evalModules {
+    modules = [
+      {
+        # Trying to write into the default
+        options.empty = lib.mkOption {
+          type = lib.types.listOf lib.types.str;
+        };
+        options.predefined = lib.mkOption {
+          type = lib.types.listOf lib.types.str;
+        };
+      }
+      {
+        empty = [ ];
+        predefined = [
+          "a"
+          "b"
+        ];
+      }
+
+      # Merge the "inventory.json"
+      (builtins.fromJSON (builtins.readFile ./lists.json))
+    ];
+  };
+in
+{
+  clanInternals.inventoryClass.inventory = eval.config;
+  clanInternals.inventoryClass.introspection = clanLib.introspection.getPrios {
+    options = eval.options;
+  };
+}