include window
call OK waddchstr $win1 `\004a\004b\004c`
call OK wrefresh $win1
call OK wmove $win1 1 1
# test should not wrap property and overlay property
call OK wbkgdset $win1 `\002\000`
call OK waddchstr $win1 `\004d\004e\004f\004g\004h\004i`
call OK wrefresh $win1
compare waddchstr.chk