assertThrows(SmbException.class, () -> {
            validator.validateFileOperation(Long.MAX_VALUE - 100, 200, Long.MAX_VALUE);
        });
    }

    @Test
    public void testValidSmbHeader() throws Exception {
        // SMB1 header
        validator.validateSmbHeader(0x424D53FF, 32, 0x72);

        // SMB2 header
        validator.validateSmbHeader(0x424D53FE, 64, 0x00);
    }