int length = SessionServicePacket.readLength(src, 0);

        assertEquals(0, length);
    }

    @Test
    @DisplayName("readn should read complete data when available")
    void testReadnComplete() throws IOException {
        byte[] buffer = new byte[10];
        byte[] data = { 1, 2, 3, 4, 5 };
        ByteArrayInputStream bais = new ByteArrayInputStream(data);