>># 
>># 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: flsh.m,v 1.13 92/06/11 17:21:23 rws Exp $
>># 
>>#
>>TITLE XFlush CH08
>>ASSERTION A XFlush-1
A call to XFlush flushes the output buffer.
>>STRATEGY
Create client2.
Discard all events on the event queue.
Create pixmap.
Empty the buffer.
Ensure the server has dealt with anything flushed to it: do XSync()
Call XFreePixmap from client2.
Call XSync from client2 to insure all potential errors arrive.
Verify that an error did occur.
Discard all events on the event queue.
Create pixmap.
Call XFlush with display.
Empty the buffer.
Ensure the server has dealt with anything flushed to it: do XSync()
Check for unexpected errors after flushing.
Call XFreePixmap from client2.
Call XSync from client2 to insure all potential errors arrive.
Verify that an error did not occur.
