assertEquals((byte) SessionServicePacket.SESSION_MESSAGE, dst[0]);
    }

    @Test
    @DisplayName("writeWireFormat should handle large lengths correctly")
    void testWriteWireFormatLargeLength() {
        packet.type = SessionServicePacket.SESSION_MESSAGE;
        packet.trailerLength = 0x10000; // Length requiring extended bit

        byte[] dst = new byte[100];