>># 
>># Copyright 1990, 1991 by the Massachusetts Institute of Technology and
>># UniSoft Group Limited.
>># 
>># Permission to use, copy, modify, distribute, and sell this software and
>># its documentation for any purpose is hereby granted without fee,
>># provided that the above copyright notice appear in all copies and that
>># both that copyright notice and this permission notice appear in
>># supporting documentation, and that the names of MIT and UniSoft not be
>># used in advertising or publicity pertaining to distribution of the
>># software without specific, written prior permission.  MIT and UniSoft
>># make no representations about the suitability of this software for any
>># purpose.  It is provided "as is" without express or implied warranty.
>># 
>># $XConsortium: rttbffrs.m,v 1.6 92/06/11 17:42:30 rws Exp $
>># 
>>#
>>TITLE XRotateBuffers CH10
>>ASSERTION A XRotateBuffers-1
A call to XRotateBuffers rotates the cut buffers by rotate
modulo 8.
>>STRATEGY
For cut buffers 0..7:
   Set the buffer to contain distinct data.
Rotate the buffers by -51 using XRotateBuffers.
For i in 0..7:
   Verify the data previously in buffer i is now in buffer (i+rotate) modulo 8.
>>ASSERTION A XRotateBuffers-2
When any of the 8 cut buffers have not been created, then a
BadMatch error occurs.
>>STRATEGY
For cut buffers 0..7:
   Set the buffer to contain some data.
Delete the property CUT_BUFFER4 from screen 0 of the display using XDeletePropery.
Rotate the buffers by 1 using XRotateBuffers.
Verify that a BadMatch error occurred.
