include window

# creates hierarchy of 4 windows
# win2,win3,win4 have same background `\001x` as inherited from win2
# squared sized windows have 6,5,4,3 side length

call win2 subwin $win1 5 5 3 6
check win2 NON_NULL
call OK wbkgd $win2 `\002x`
# window background is inherited from ancestor windows

call win3 subwin $win2 4 4 4 7
check win3 NON_NULL

call win4 subwin $win3 3 3 5 8
check win4 NON_NULL

call OK wrefresh $win4
call OK wrefresh $win3
call OK wrefresh $win2
call OK wrefresh $win1

compare window_hierarchy.chk