patch 8.2.0011: screen updating wrong when opeing preview window
Problem: Screen updating wrong when opeing preview window.
Solution: Redraw the window when the preview window opens.
diff --git a/src/testdir/test_ins_complete.vim b/src/testdir/test_ins_complete.vim
index ad62944..95954f5 100644
--- a/src/testdir/test_ins_complete.vim
+++ b/src/testdir/test_ins_complete.vim
@@ -404,3 +404,30 @@
call StopVimInTerminal(buf)
call delete('Xpumscript')
endfunc
+
+func Test_pum_with_preview_win()
+ CheckScreendump
+
+ let lines =<< trim END
+ funct Omni_test(findstart, base)
+ if a:findstart
+ return col(".") - 1
+ endif
+ return [#{word: "one", info: "1info"}, #{word: "two", info: "2info"}, #{word: "three", info: "3info"}]
+ endfunc
+ set omnifunc=Omni_test
+ set completeopt+=longest
+ END
+
+ call writefile(lines, 'Xpreviewscript')
+ let buf = RunVimInTerminal('-S Xpreviewscript', #{rows: 12})
+ call term_wait(buf, 100)
+ call term_sendkeys(buf, "Gi\<C-X>\<C-O>")
+ call term_wait(buf, 100)
+ call term_sendkeys(buf, "\<C-N>")
+ call VerifyScreenDump(buf, 'Test_pum_with_preview_win', {})
+
+ call term_sendkeys(buf, "\<Esc>")
+ call StopVimInTerminal(buf)
+ call delete('Xpreviewscript')
+endfunc