refactor(tests): reuse CLI loader in more tests (#2571)

tests/test_theme_cli_store.py

@@ -1,25 +1,11 @@
-import importlib.machinery
-import importlib.util
-from pathlib import Path
-
 import pytest
 
-
-ROOT = Path(__file__).resolve().parents[1]
-
-
-def _load_cli():
-    path = ROOT / "scripts" / "odysseus-theme"
-    loader = importlib.machinery.SourceFileLoader("odysseus_theme_cli", str(path))
-    spec = importlib.util.spec_from_loader(loader.name, loader)
-    module = importlib.util.module_from_spec(spec)
-    loader.exec_module(module)
-    return module
+from tests.helpers.cli_loader import load_script
 
 
 @pytest.mark.parametrize("payload", ["[]", '{"_users": []}'])
 def test_load_prefs_rejects_non_object_user_store(tmp_path, capsys, payload):
-    cli = _load_cli()
+    cli = load_script("odysseus-theme")
     cli._USER_PREFS_PATH = tmp_path / "user_prefs.json"
     cli._USER_PREFS_PATH.write_text(payload)