assertNull(url.getRef(), "Ref should remain null for root URL");
    }

    @Test
    @DisplayName("parseURL: fragment is moved into path and ref cleared")
    void testParseURL_FragmentMovedToPath() throws MalformedURLException {
        // Arrange & Act
        Handler handler = newHandler();
        URL url = new URL(null, "smb://server/share#frag", handler);