>># 
>># 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: stsbwmd.m,v 1.5 92/06/11 16:19:38 rws Exp $
>># 
>>#      SCCS:  @(#)  EAll.mc Rel 1.5	    (3/12/92)
>>#      SCCS:  @(#)  EGC.mc Rel 1.5	    (10/25/91)
>>#      SCCS:  @(#)  EVal.mc Rel 1.5	    (10/10/91)
>>#
>>TITLE XSetSubwindowMode CH05
>>ASSERTION A XSetSubwindowMode-1
A call to XSetSubwindowMode sets the subwindow_mode
component of the specified GC to the value of the
subwindow_mode argument.
>>STRATEGY
Create window.
Create child window fully obscuring the parent.
Create GC with subwindow_mode = IncludeInferiors, fg = WhitePixel, bg = BlackPixel.
Draw point (0, 0) on ParentWindow.
Verify pixel at (0, 0) is fg using XGetImage and XGetPixel.
Verify pixel at (0, 1) is bg using XGetImage and XGetPixel.
Set subwindow_mode of GC to ClipByChildren with XSetSubwindowMode.
Set pixel at (0, 1) on parent window.
Verify pixel at (0, 1) is bg using XGetImage and XGetPixel.
>>ASSERTION B XSetSubwindowMode-2
When the server fails to allocate a required resource, then
a BadAlloc error occurs.
>>STRATEGY
Report UNTESTED
>>ASSERTION A XSetSubwindowMode-3
When the GC argument does not name a defined GC, then a
BadGC error occurs.
>>STRATEGY
Create a GC.
Set GC id to -1 using XTestSetGContextOfGC.
Call test function using bad GC as the GC argument.
Verify that a BadGC error occurs.
>>ASSERTION A XSetSubwindowMode-4
When the value of subwindow_mode is other than
ClipByChildren or IncludeInferiors, then a BadValue error
occurs.
>>STRATEGY
Obtain a sequence of values which are not in the list specified by VALUE_LIST.
For each value:
  Call test function with this value in the VALUE_ARG argument.
  Verify that a BadValue error occurs.
