trans2SetFileInfo = new Trans2SetFileInformation(config, TEST_FID, mockFileInfo);

        byte[] buffer = new byte[512];
        // Fill buffer with non-zero values to ensure padding writes zeros
        for (int i = 0; i < buffer.length; i++) {
            buffer[i] = (byte) 0xFF;
        }

        int written = trans2SetFileInfo.writeDataWireFormat(buffer, 0);

        // Normalize each part (remove leading zeros)
        final String[] normalized = new String[8];
        for (int i = 0; i < 8; i++) {
            normalized[i] = parts[i].replaceFirst("^0+(?!$)", "");
            if (normalized[i].isEmpty()) {
                normalized[i] = "0";
            }
        }

        // Find longest sequence of consecutive zeros
        int longestStart = -1;

        assertEquals(0, cmd.readParametersWireFormat(buf, 0, buf.length));
        assertEquals(0, cmd.readDataWireFormat(buf, 0, buf.length));
    }

    @ParameterizedTest
    @CsvSource({ "0, 0", // all zeros
            "-1, 2147483647", // negative fid, max positive security
            "12345, 999" // arbitrary numbers
    })
    void toString_includesCorrectHexValues(int fid, int securityInformation) {

        SMBUtil.writeInt2(0x0302, buffer, 4);

        // Negotiate context count (0 for non-3.1.1)
        SMBUtil.writeInt2(0, buffer, 6);

        // Server GUID (16 bytes of zeros)
        // Already initialized to zeros

        // Capabilities
        SMBUtil.writeInt4(Smb2Constants.SMB2_GLOBAL_CAP_DFS, buffer, 24);

        // Max sizes (reasonable values)

		if _, err := io.ReadFull(tr.r, tr.blk[:]); err != nil {
			return nil, nil, err // EOF is okay here; exactly 1 block of zeros read
		}
		if bytes.Equal(tr.blk[:], zeroBlock[:]) {
			return nil, nil, io.EOF // normal EOF; exactly 2 block of zeros read
		}
		return nil, nil, ErrHeader // Zero block and then non-zero block
	}

	// Verify the header matches a known format.
	format := tr.blk.getFormat()

			got := string(readBuf[:n])
			if err != nil || got != want {
				t.Errorf("off %d, size %d = %v, %v (%q); want %q", off, size, n, err, got, want)
			}
		}
	}

}

type zeros struct{}

func (zeros) Read(p []byte) (int, error) {
	clear(p)
	return len(p), nil

        writeInt8(0L, dst, dstIndex);
        dstIndex += 8;
        /* Samba 2.2.7 needs ATTR_NORMAL
         */
        writeInt2(0x80 | attributes, dst, dstIndex);
        dstIndex += 2;
        /* 6 zeros observed with NT */
        writeInt8(0L, dst, dstIndex);
        dstIndex += 6;

        /* Also observed 4 byte alignment but we stick
         * with the default for jCIFS which is 2 */

        message[61] = 0x00;
        message[62] = 0x00;
        message[63] = 0x00;

        // Add dummy LM response (24 zeros at offset 64)
        for (int i = 0; i < 24; i++) {
            message[64 + i] = 0;
        }

        // Add dummy NT response (24 zeros at offset 88)
        for (int i = 0; i < 24; i++) {
            message[88 + i] = 0;
        }

    }

    @Test
    @DisplayName("Should handle null file ID gracefully")
    void testNullFileId() {
        // Given
        byte[] nullFileId = new byte[16]; // All zeros
        Configuration config = mock(Configuration.class);
        when(config.getNotifyBufferSize()).thenReturn(8192);

        // When

            assertEquals(originalMessage.getFlags(), parsedMessage.getFlags());
            assertNull(parsedMessage.getChallenge()); // Should be null if all zeros
            assertNull(parsedMessage.getTarget());
            assertNull(parsedMessage.getContext()); // Should be null if all zeros
            assertNull(parsedMessage.getTargetInformation());
        }

        @Test