let lines =<< trim END
call setline(1, range(1, 20))
+ hi ScrollThumb ctermbg=blue
+ hi ScrollBar ctermbg=red
let winid = popup_create(['one', 'two', 'three', 'four', 'five',
\ 'six', 'seven', 'eight', 'nine'], {
\ 'minwidth': 8,
call term_sendkeys(buf, ":call popup_setoptions(winid, {'firstline': 9})\<CR>")
call VerifyScreenDump(buf, 'Test_popupwin_scroll_4', {})
+ call term_sendkeys(buf, ":call popup_setoptions(winid, {'scrollbarhighlight': 'ScrollBar', 'thumbhighlight': 'ScrollThumb'})\<CR>")
call term_sendkeys(buf, ":call ScrollUp()\<CR>")
call VerifyScreenDump(buf, 'Test_popupwin_scroll_5', {})