public void testNegativeFileSize() throws Exception {
        assertThrows(SmbException.class, () -> {
            validator.validateFileSize(-1);
        });
    }

    @Test
    public void testFileSizeTooLarge() throws Exception {
        assertThrows(SmbException.class, () -> {
            validator.validateFileSize(2L * 1099511627776L); // 2TB
        });
    }

    @Test