log.debug("Sign key is " + Hexdump.toHexString(this.signKey));
            log.debug("Verify key is " + Hexdump.toHexString(this.verifyKey));
        }

        this.sealClientKey = deriveKey(mk, C2S_SEAL_CONSTANT);
        this.sealClientHandle = Crypto.getArcfour(this.sealClientKey);
        if (log.isDebugEnabled()) {
            log.debug("Seal key is " + Hexdump.toHexString(this.sealClientKey));
        }

        assertEquals("00000000", Hexdump.toHexString(0, 8));
        assertEquals("000000FF", Hexdump.toHexString(255, 8));
        assertEquals("00001000", Hexdump.toHexString(4096, 8));
        assertEquals("FFFFFFFF", Hexdump.toHexString(-1, 8));

        // Test different sizes
        assertEquals("00", Hexdump.toHexString(0, 2));
        assertEquals("FF", Hexdump.toHexString(255, 2));

        // Test zero
        assertEquals("00000000", Hexdump.toHexString(0, 8));
        assertEquals("0000", Hexdump.toHexString(0, 4));
        assertEquals("00", Hexdump.toHexString(0, 2));

        // Test positive values
        assertEquals("000000FF", Hexdump.toHexString(255, 8));
        assertEquals("00FF", Hexdump.toHexString(255, 4));
        assertEquals("FF", Hexdump.toHexString(255, 2));

        // Test larger values

                + Hexdump.toHexString(desiredAccess, 4) + ",searchAttributes=0x" + Hexdump.toHexString(searchAttributes, 4)
                + ",fileAttributes=0x" + Hexdump.toHexString(fileAttributes, 4) + ",creationTime=" + new Date(creationTime)

        String str = notifyChange.toString();
        assertTrue(str.contains("NtTransNotifyChange"));
        assertTrue(str.contains("fid=0x" + Hexdump.toHexString(fid, 4)));
        assertTrue(str.contains("filter=0x" + Hexdump.toHexString(completionFilter, 4)));
        assertTrue(str.contains("watchTree=" + watchTree));
    }

    @Test
    @DisplayName("Test constructor with watchTree enabled")

                + rootDirectoryFid + ",desiredAccess=0x" + Hexdump.toHexString(desiredAccess, 4) + ",allocationSize=" + allocationSize
                + ",extFileAttributes=0x" + Hexdump.toHexString(extFileAttributes, 4) + ",shareAccess=0x"

            assertTrue(result.startsWith("NtlmChallenge[challenge=0x"));
            assertTrue(result.endsWith(",dc=SERVER123]"));

            // Hexdump.toHexString with size = length * 2 produces 8 uppercase hex chars
            // The hex should be "010203FF"
            assertTrue(result.contains("010203FF"));
        }

        @Test

     * @return a hexadecimal string representation of the entire byte array
     */
    public static String toHexString(final byte[] data) {
        return toHexString(data, 0, data.length);
    }

    /**
     * This is the same as {@link jcifs.util.Hexdump#toHexString(int val, int
     * size)} but provides a more practical form when trying to avoid {@link

                + Hexdump.toHexString(this.desiredAccess, 4) + ",searchAttributes=0x" + Hexdump.toHexString(this.searchAttributes, 4)
                + ",fileAttributes=0x" + Hexdump.toHexString(this.fileAttributes, 4) + ",creationTime=" + new Date(this.creationTime)

                + this.rootDirectoryFid + ",desiredAccess=0x" + Hexdump.toHexString(this.desiredAccess, 4) + ",allocationSize="
                + this.allocationSize + ",extFileAttributes=0x" + Hexdump.toHexString(this.extFileAttributes, 4) + ",shareAccess=0x"