>># 
>># 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: dltprprty.m,v 1.6 92/06/11 16:12:40 rws Exp $
>># 
>>#      SCCS:  @(#)  EAto.mc Rel 1.6	    (10/4/91)
>>#      SCCS:  @(#)  EWin.mc Rel 1.4	    (7/19/91)
>>#
>>TITLE XDeleteProperty CH04
>>ASSERTION A XDeleteProperty-1
When the specified property exists on the specified window
w, then a call to XDeleteProperty deletes the property and
a PropertyNotify event is generated on the window w.
>>STRATEGY
Create a window with a property and  PropertyChangeMask events selected. 
Call XDeleteProperty to delete the property.
Verify that a good PropertyNotify event occurred.
Verify that the window property was deleted.
>>ASSERTION A XDeleteProperty-2
When the specified property does not exist on the specified
window w, then a call to XDeleteProperty deletes no
property of the window w and no PropertyNotify event is
generated.
>>STRATEGY
Create a window with a property and PropertyChangeMask events selected. 
Call XDeleteProperty to delete a non-existant property.
Verify that no PropertyNotify events occurred.
Verify that the window property was not deleted.
>>ASSERTION A XDeleteProperty-3
When an atom argument does not name a valid Atom, then a
BadAtom error occurs.
>>STRATEGY
Call test function using a value with the top bits set as the atom argument.
Verify that a BadAtom error occurs.
>>ASSERTION A XDeleteProperty-4
When a window argument does not name a valid Window, then a
BadWindow error occurs.
>>STRATEGY
Create a bad window by creating and destroying a window.
Call test function using bad window as the window argument.
Verify that a BadWindow error occurs.
