from spectra.mqtt import _lookup_image_path, _db_path


class TestDbPath:
    def test_db_path_ends_web_db(self):
        path = _db_path()
        assert path.endswith("web.db")


class TestLookupImagePath:
    def test_nonexistent_id_returns_none(self):
        assert _lookup_image_path(99999) is None

    def test_negative_id_returns_none(self):
        assert _lookup_image_path(-1) is None