patch 8.1.1441: popup window filter not yet implemented
Problem: Popup window filter not yet implemented.
Solution: Implement the popup filter.
diff --git a/src/testdir/test_popupwin.vim b/src/testdir/test_popupwin.vim
index 1c8f7ef..b9d6a06 100644
--- a/src/testdir/test_popupwin.vim
+++ b/src/testdir/test_popupwin.vim
@@ -473,3 +473,46 @@
bwipe!
endfunc
+
+func Test_popup_filter()
+ new
+ call setline(1, 'some text')
+
+ func MyPopupFilter(winid, c)
+ if a:c == 'e'
+ let g:eaten = 'e'
+ return 1
+ endif
+ if a:c == '0'
+ let g:ignored = '0'
+ return 0
+ endif
+ if a:c == 'x'
+ call popup_close(a:winid)
+ return 1
+ endif
+ return 0
+ endfunc
+
+ let winid = popup_create('something', {'filter': 'MyPopupFilter'})
+ redraw
+
+ " e is consumed by the filter
+ call feedkeys('e', 'xt')
+ call assert_equal('e', g:eaten)
+
+ " 0 is ignored by the filter
+ normal $
+ call assert_equal(9, getcurpos()[2])
+ call feedkeys('0', 'xt')
+ call assert_equal('0', g:ignored)
+ call assert_equal(1, getcurpos()[2])
+
+ " x closes the popup
+ call feedkeys('x', 'xt')
+ call assert_equal('e', g:eaten)
+ call assert_equal(-1, winbufnr(winid))
+
+ delfunc MyPopupFilter
+ popupclear
+endfunc