// Then
        assertEquals(value & 0xFFFFFFFFL, decoded);
        assertEquals(0x78, buffer[0] & 0xFF);
        assertEquals(0x56, buffer[1] & 0xFF);
        assertEquals(0x34, buffer[2] & 0xFF);
        assertEquals(0x12, buffer[3] & 0xFF);
    }

    @Test
    @DisplayName("Should encode and decode 64-bit integers")
    void testInt64Operations() {
        // Given

    }

    @Test
    public void testReadUnsignedInt() throws IOException {
        // Little-endian 0xFFFFFFFF -> 0xFF 0xFF 0xFF 0xFF
        byte[] data = new byte[] { (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF };
        PacDataInputStream pdis = createInputStream(data);
        assertEquals(0xFFFFFFFFL, pdis.readUnsignedInt());
    }

    @Test

     */
    public static int readInt4(final byte[] src, final int srcIndex) {
        return (src[srcIndex] & 0xFF) + ((src[srcIndex + 1] & 0xFF) << 8) + ((src[srcIndex + 2] & 0xFF) << 16)
                + ((src[srcIndex + 3] & 0xFF) << 24);
    }

    /**
     * Reads a 64-bit integer value from a byte array in little-endian format
     * @param src the source byte array

   *
   * @throws IOException if an I/O error occurs
   */
  @Override
  public void writeInt(int v) throws IOException {
    out.write(0xFF & v);
    out.write(0xFF & (v >> 8));
    out.write(0xFF & (v >> 16));
    out.write(0xFF & (v >> 24));
  }

  /**
   * Writes a {@code long} as specified by {@link DataOutputStream#writeLong(long)}, except using
   * little-endian byte order.
   *

    }

    static int readULong(final byte[] src, final int index) {
        return src[index] & 0xff | (src[index + 1] & 0xff) << 8 | (src[index + 2] & 0xff) << 16 | (src[index + 3] & 0xff) << 24;
    }

    static int readUShort(final byte[] src, final int index) {
        return src[index] & 0xff | (src[index + 1] & 0xff) << 8;
    }

    static byte[] readSecurityBuffer(final byte[] src, final int index) {

        buf[i++] = (byte) ((oidLen >>> 8) & 0xFF);
        buf[i++] = (byte) (oidLen & 0xFF);
        // MECH_OID
        System.arraycopy(oidDer, 0, buf, i, oidLen);
        i += oidLen;
        // NAME_LEN (4 bytes big-endian)
        buf[i++] = (byte) ((nameLen >>> 24) & 0xFF);
        buf[i++] = (byte) ((nameLen >>> 16) & 0xFF);
        buf[i++] = (byte) ((nameLen >>> 8) & 0xFF);
        buf[i++] = (byte) (nameLen & 0xFF);

     */
    public static int enc_uint32be(final int i, final byte[] dst, int di) {
        dst[di] = (byte) (i >> 24 & 0xFF);
        di++;
        dst[di++] = (byte) (i >> 16 & 0xFF);
        dst[di++] = (byte) (i >> 8 & 0xFF);
        dst[di] = (byte) (i & 0xFF);
        return 4;
    }

    /**
     * Encodes a 16-bit unsigned integer in little-endian byte order.
     *

     */
    public static int enc_uint32be(final int i, final byte[] dst, int di) {
        dst[di] = (byte) (i >> 24 & 0xFF);
        di++;
        dst[di++] = (byte) (i >> 16 & 0xFF);
        dst[di++] = (byte) (i >> 8 & 0xFF);
        dst[di] = (byte) (i & 0xFF);
        return 4;
    }

    /**
     * Encodes a 16-bit unsigned integer in little-endian byte order.
     *

        assertEquals((byte) ((value >> 8) & 0xFF), dst[0]);
        assertEquals((byte) (value & 0xFF), dst[1]);
    }

    @Test
    @DisplayName("writeInt2 with offset should write at correct position")
    void testWriteInt2WithOffset() {
        byte[] dst = new byte[10];
        dst[2] = (byte) 0xFF; // Mark position
        dst[3] = (byte) 0xFF;

        SessionServicePacket.writeInt2(0xABCD, dst, 4);

        dstIndex += this.wordCount + 1;
        this.wordCount /= 2;
        dst[start] = (byte) (this.wordCount & 0xFF);

        this.byteCount = writeBytesWireFormat(dst, dstIndex + 2);
        dst[dstIndex] = (byte) (this.byteCount & 0xFF);
        dstIndex++;
        dst[dstIndex++] = (byte) (this.byteCount >> 8 & 0xFF);
        dstIndex += this.byteCount;

        /*