lenient().when(handle.getSessionKey()).thenCallRealMethod();
        lenient().when(handle.getBinding()).thenReturn(mockDcerpcBinding);
        lenient().doCallRealMethod().when(handle).doSendReceiveFragment(any(byte[].class), anyInt(), anyInt(), any(byte[].class));
        lenient().doCallRealMethod().when(handle).doSendFragment(any(byte[].class), anyInt(), anyInt());

        return this.handle.getSessionKey();
    }

    /**
     * {@inheritDoc}
     *
     * @see jcifs.dcerpc.DcerpcHandle#doSendReceiveFragment(byte[], int, int, byte[])
     */
    @Override
    protected int doSendReceiveFragment(final byte[] buf, final int off, final int length, final byte[] inB) throws IOException {
        if (this.handle.isStale()) {

        }

        @Override
        protected int doReceiveFragment(byte[] buf) throws IOException {
            return doReceiveFragmentReturn;
        }

        @Override
        protected int doSendReceiveFragment(byte[] out, int off, int length, byte[] inB) throws IOException {
            return doSendReceiveFragmentReturn;
        }

        public void setDoReceiveFragmentReturn(int value) {

            final int off = sendFragments(msg, out, buf);

            // last fragment gets written (possibly) using transact/call semantics
            final int have = doSendReceiveFragment(out, off, msg.length, inB);

            if (have != 0) {
                final NdrBuffer hdrBuf = new NdrBuffer(inB, 0);
                setupReceivedFragment(hdrBuf);
                hdrBuf.setIndex(0);