--| Copyright (c) 1993-2006 University of Southern California and contributors. --| All rights reserved. --| Your use of this work is governed under the terms of the GNU General --| Public License version 2. class TEST creation make feature make is do try end; try is require is_valid: is_valid do end is_valid: BOOLEAN is do io.put_string ("Checking precondition") io.new_line Result := True end end