>># 
>># 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: txtwdth.m,v 1.7 92/06/11 17:09:45 rws Exp $
>># 
>>#
>>TITLE XTextWidth CH06
>>ASSERTION A XTextWidth-1
A call to XTextWidth returns the sum of the character-width
metrics of all characters in the 8-bit character string,
string, as rendered in the font referenced by font_struct.
>>STRATEGY
The known good font information structures are used so that these tests
  are isolated from XLoadQueryFont.
Make a string consisting of all characters from 0 to 255.
Call XTextWidth.
Verify by direct calculation from the metrics.
