// Reset to read-write for cleanup
        file.setReadWrite();
        assertTrue(file.canWrite(), "File should be writable after setReadWrite");
    }

    @Test
    void testAppendMode() throws Exception {
        // Test SMB file append mode
        long timestamp = System.currentTimeMillis();
        SmbFile file = new SmbFile(baseUrl + "shared/append_" + timestamp + ".txt", context);