return this.nextCommand;
    }

    /**
     * Sets the read size for this message.
     *
     * @param readSize
     *            the readSize to set
     */
    public void setReadSize(final int readSize) {
        this.readSize = readSize;
    }

    /**
     * Checks whether this message is an asynchronous message.
     *
     * @return the async
     */

            assertEquals(0, testMessage.getCreditCharge());
        }

        @Test
        @DisplayName("Should get and set read size")
        void testReadSizeProperty() {
            testMessage.setReadSize(1024);
            // No getter for readSize, but it's used internally in decode
        }

        @Test
        @DisplayName("Should check if async")
        void testAsyncProperty() {

            System.arraycopy(this.sbuf, 4, buffer, 0, Smb2Constants.SMB2_HEADER_LENGTH);
            readn(this.in, buffer, Smb2Constants.SMB2_HEADER_LENGTH, rl - Smb2Constants.SMB2_HEADER_LENGTH);

            cur.setReadSize(rl);
            int len = cur.decode(buffer, 0);

            if (len > rl) {
                throw new IOException(String.format("WHAT? ( read %d decoded %d ): %s", rl, len, cur));
            }