assertEquals((byte) 0x01, dst[1]); // Extended length bit should be set
    }

    @Test
    @DisplayName("readWireFormat should read header and trailer")
    void testReadWireFormat() throws IOException {
        byte[] data = new byte[50];
        data[0] = (byte) 0x85; // SESSION_KEEP_ALIVE
        data[1] = 0x00;
        data[2] = 0x00;
        data[3] = 0x0A; // Length = 10

        int written = packet.writeWireFormat(dst, 0);
        // HEADER_LENGTH (12) + writeBodyWireFormat (0) = 12
        assertEquals(12, written);
    }

    @Test
    void testReadWireFormat() {
        byte[] src = new byte[50];
        NameServicePacket.writeInt2(0x1234, src, 0); // nameTrnId
        src[2] = (byte) (0x00 | (NameServicePacket.QUERY << 3)); // opCode