byte[] emptyFileId = new byte[16];
            assertDoesNotThrow(() -> new Smb2WriteRequest(mockConfig, emptyFileId));
        }
    }

    @Nested
    @DisplayName("FileId Tests")
    class FileIdTests {

        @Test
        @DisplayName("Should set file ID correctly")
        void testSetFileId() {
            byte[] newFileId = new byte[16];
            new SecureRandom().nextBytes(newFileId);

        // 2 reserved bytes
        pos += 2;
        // ctlCode
        SMBUtil.writeInt4(ctlCode, buf, pos);
        pos += 4;
        // fileId (16 bytes)
        byte[] fid = fileId != null ? fileId : new byte[16];
        System.arraycopy(fid, 0, buf, pos, 16);
        pos += 16;

        // Calculate offsets relative to start of SMB2 header
        int inputOffsetField = inputCount > 0 ? payloadStart : 0;

                    d[si % 16] = '.';
                } else {
                    d[si % 16] = (char) i;
                }
            } while (++si % 16 != 0);
            c[ci++] = ' ';
            c[ci++] = ' ';
            c[ci++] = '|';
            System.arraycopy(d, 0, c, ci, 16);
            ci += 16;
            c[ci++] = '|';
            NL.getChars(0, NL_LENGTH, c, ci);

    }

    @Test
    public void testKeyIsolation() {
        String sessionId1 = "session-1";
        String sessionId2 = "session-2";

        byte[] key1 = new byte[16];
        byte[] key2 = new byte[16];
        new SecureRandom().nextBytes(key1);
        new SecureRandom().nextBytes(key2);

        keyManager.storeSessionKey(sessionId1, key1, "AES");

                groupName = ((src[srcIndex + 16] & 0x80) == 0x80) == true;
                ownerNodeType = (src[srcIndex + 16] & 0x60) >> 5;
                isBeingDeleted = ((src[srcIndex + 16] & 0x10) == 0x10) == true;
                isInConflict = ((src[srcIndex + 16] & 0x08) == 0x08) == true;
                isActive = ((src[srcIndex + 16] & 0x04) == 0x04) == true;

	{"$1", "$1"},
	{"$-1", "$-1"},
	{"$1000", "$1000"},
	{"$1000000000", "$1000000000"},
	{"$0x7fff3c000", "$34358935552"},
	{"$1234", "$1234"},
	{"$~15", "$-16"},
	{"$16", "$16"},
	{"-16(RSP)", "-16(RSP)"},
	{"16(RSP)", "16(RSP)"},
	{"1(R1)", "1(R1)"},
	{"-1(R4)", "-1(R4)"},
	{"18740(R5)", "18740(R5)"},
	{"$2", "$2"},
	{"$-24(R4)", "$-24(R4)"},
	{"-24(RSP)", "-24(RSP)"},
	{"$24(RSP)", "$24(RSP)"},

    private Smb2CloseResponse response;
    private byte[] testFileId;
    private String testFileName;

    @BeforeEach
    void setUp() {

        // Create a test file ID (16 bytes)
        testFileId = new byte[16];
        for (int i = 0; i < 16; i++) {
            testFileId[i] = (byte) (i + 1);
        }

        testFileName = "test-file.txt";
        response = new Smb2CloseResponse(mockConfig, testFileId, testFileName);

<setting id="org.eclipse.jdt.core.formatter.insert_space_after_comma_in_method_invocation_arguments" value="insert"/>
<setting id="org.eclipse.jdt.core.formatter.alignment_for_arguments_in_method_invocation" value="16"/>
<setting id="org.eclipse.jdt.core.formatter.alignment_for_throws_clause_in_constructor_declaration" value="16"/>

            bb.putShort((short) 1); // version
            bb.putShort((short) 16); // size
            bb.putShort((short) 1); // serverType
            bb.putShort((short) 2); // rflags
            bb.put("\\srv1\0".getBytes(StandardCharsets.UTF_16LE));

            // Position for second referral
            bb.position(24); // 8 header + 16 first referral

            // Second Referral v1

        dstIndex += 4;

        SMBUtil.writeInt8(0, dst, dstIndex); // Reserved (8 bytes)
        dstIndex += 8;

        System.arraycopy(createGuid.toBytes(), 0, dst, dstIndex, 16); // CreateGuid (16 bytes)
        dstIndex += 16;

        return dstIndex - start;
    }