save a file to alocal folder and make it executable

tests/main_test.py

@@ -0,0 +1,13 @@
+from pathlib import Path
+
+from majordome import main
+
+
+def test_download_and_save_latest_asset(freetube_url, freetube_amd64_deb_mnemonic):
+    destination = Path(__file__).parent / "tmp"
+
+    main.download_latest(freetube_url, freetube_amd64_deb_mnemonic, destination)
+
+    files = list(destination.glob("*"))
+    assert len(files) == 1
+    assert files[0].filename == "freetube_0.23.2_amd64.deb"