byte[] testContext =
                    new byte[] { (byte) 0x11, (byte) 0x22, (byte) 0x33, (byte) 0x44, (byte) 0x55, (byte) 0x66, (byte) 0x77, (byte) 0x88 };
            message.setContext(testContext);
            byte[] testTargetInfo = new byte[] { 0x10, 0x20, 0x30 };
            message.setTargetInformation(testTargetInfo);

            // When

    }

    @Test
    @DisplayName("Should encode and decode UUIDs")
    void testUUIDOperations() {
        // Given
        byte[] uuid = { 0x12, 0x34, 0x56, 0x78, (byte) 0x9A, (byte) 0xBC, (byte) 0xDE, (byte) 0xF0, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66,
                0x77, (byte) 0x88 };
        byte[] buffer = new byte[16];

        // When
        System.arraycopy(uuid, 0, buffer, 0, 16);

        assertEquals(dst.length, n);

        // resumeKey (LE) at offset 6..9 should be 0x11121314 -> 14 13 12 11
        assertEquals((byte) 0x14, dst[6]);
        assertEquals((byte) 0x13, dst[7]);
        assertEquals((byte) 0x12, dst[8]);
        assertEquals((byte) 0x11, dst[9]);

        // filename content
        byte[] nameBytes = updatedName.getBytes();
        for (int i = 0; i < nameBytes.length; i++) {

        assertEquals(0x10, smbComOpenAndX.openFunction); // OPEN_FN_CREATE | OPEN_FN_FAIL_IF_EXISTS
    }

    /**
     * Test constructor with O_CREAT flag.
     */
    @Test
    void testConstructor_CreateAndOpen() {
        int flags = SmbFile.O_CREAT;
        smbComOpenAndX = new SmbComOpenAndX(fileName, access, flags, andx);

            lock = new Smb2Lock(100L, 200L, sharedWithFailImmediately);
            lock.encode(buffer, 0);

            assertEquals(0x11, SMBUtil.readInt4(buffer, 16));
        }
    }

    @Nested
    @DisplayName("Edge Cases and Boundary Tests")
    class EdgeCaseTests {

        @Test
        @DisplayName("Should handle encoding at buffer boundary")

    void testReadULongOutOfBounds() {
        byte[] a = new byte[] { 0x01, 0x02, 0x03 };
        assertThrows(IndexOutOfBoundsException.class, () -\u003e NtlmMessage.readULong(a, 0));
    }

    @Test
    @DisplayName("readSecurityBuffer correctly extracts data")
    void testReadSecurityBuffer() {
        byte[] buf = new byte[8 + 4];
        byte[] payload = { 0x11, 0x22, 0x33, 0x44 };

        assertEquals(1, SMBUtil.readInt2(buffer, 8));
        assertEquals(1, SMBUtil.readInt2(buffer, 10));
    }

    /**
     * Test that a large file lock (bit 0x10 set) is encoded and decoded correctly.
     */
    @ParameterizedTest
    @ValueSource(ints = { 0x10, 0x11 })
    void largeFileFlagSet_and_decoded_according_to_type(int type) throws Exception {
        Configuration cfg = mock(Configuration.class);

        request.writeBytesWireFormat(buffer, 0);

        // Then
        int readFilter = SMBUtil.readInt4(buffer, 24);
        assertEquals(combinedFilter, readFilter);
        assertEquals(0x1F, readFilter); // 1 + 2 + 4 + 8 + 16 = 31 = 0x1F
    }

    @Test
    @DisplayName("Should handle all file change notifications")
    void testAllFileChangeNotifications() {
        // Given - all possible filters

        byte[] data4 = { 0x00, 0x11, 0x22, 0x33, 0x44 };
        assertEquals("00", Hexdump.toHexString(data4, 1, 2)); // Bug: ignores srcIndex, reads from 0
        assertEquals("0011", Hexdump.toHexString(data4, 1, 4)); // Bug: ignores srcIndex, reads from 0
        assertEquals("0011", Hexdump.toHexString(data4, 2, 4)); // Bug: ignores srcIndex, reads from 0
    }

    @Test

            byte[] buffer1 = new byte[100];
            byte[] buffer2 = new byte[200];

            Arrays.fill(buffer1, (byte) 0x11);
            Arrays.fill(buffer2, (byte) 0x22);

            // First decode
            response.decode(buffer1, 0, 50);
            byte[] data1 = response.getData();