assertThrows(SmbException.class, () -> {
            validator.validateFileOperation(900, 200, 1000);
        });
    }

    @Test
    public void testFileOperationOverflow() throws Exception {
        assertThrows(SmbException.class, () -> {
            validator.validateFileOperation(Long.MAX_VALUE - 100, 200, Long.MAX_VALUE);
        });
    }

    @Test