NdrShort ndrShort = new NdrShort(inputValue);

            // Then: Value should be masked with 0xFF (lower 8 bits)
            assertEquals(inputValue & 0xFF, ndrShort.value, "Constructor should mask value with 0xFF");
        }

        @Test
        @DisplayName("Should handle zero value correctly")
        void testConstructorZero() {
            // Given/When: Creating NdrShort with zero

        key8[0] = (byte) (key7[0] >> 1 & 0xff);
        key8[1] = (byte) (((key7[0] & 0x01) << 6 | (key7[1] & 0xff) >> 2 & 0xff) & 0xff);
        key8[2] = (byte) (((key7[1] & 0x03) << 5 | (key7[2] & 0xff) >> 3 & 0xff) & 0xff);
        key8[3] = (byte) (((key7[2] & 0x07) << 4 | (key7[3] & 0xff) >> 4 & 0xff) & 0xff);
        key8[4] = (byte) (((key7[3] & 0x0F) << 3 | (key7[4] & 0xff) >> 5 & 0xff) & 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.
     *

    }

    @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

        // 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

        buffer[index++] = (byte) (flags & 0xFF);
        buffer[index++] = (byte) ((flags >> 8) & 0xFF);

        // Session ID (8 bytes) - little-endian
        buffer[index++] = (byte) (testSessionId & 0xFF);
        buffer[index++] = (byte) ((testSessionId >> 8) & 0xFF);
        buffer[index++] = (byte) ((testSessionId >> 16) & 0xFF);
        buffer[index++] = (byte) ((testSessionId >> 24) & 0xFF);

        assertArrayEquals(new byte[] { (byte) 0xFF, (byte) 0xFF }, dst, "Negative sid should wrap to 0xFFFF");
    }

    @Test
    void testWriteParameterWordsWithOffset() {
        byte[] dst = new byte[5];
        int written = instance.writeParameterWordsWireFormat(dst, 3);
        assertEquals(2, written);
        assertEquals((byte) (TEST_SID & 0xFF), dst[3]);
        assertEquals((byte) ((TEST_SID >> 8) & 0xFF), dst[4]);

     */
    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.
     *

    val version = fromSource.readByte() and 0xff
    if (version != VERSION_5) throw ProtocolException("unexpected version: $version")

    val command = fromSource.readByte() and 0xff

    val reserved = fromSource.readByte() and 0xff
    if (reserved != 0) throw ProtocolException("unexpected reserved: $reserved")

    val addressType = fromSource.readByte() and 0xff
    val toAddress =
      when (addressType) {

        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);