class Invalid {
        @Test
        void nullUrlThrows() {
            assertThrows(IllegalArgumentException.class, () -> new DummySmbResourceLocator(null));
        }

        @Test
        void unsupportedProtocolThrows() {
            String url = "http://example.com";
            assertThrows(MalformedURLException.class, () -> new DummySmbResourceLocator(url));
        }

        @Test