patch 9.1.1265: tests: no tests for typing normal char during completion

Problem:  tests: no tests for typing normal char during completion
Solution: add a test verifying the default behaviour (see :h
          popupmenu-completion)

related: vim#17019

Co-authored-by: Girish Palya <[email protected]>
Signed-off-by: Christian Brabandt <[email protected]>

Author: chrisbra

src/testdir/test_ins_complete.vim

@@ -3387,4 +3387,33 @@ func Test_complete_multiline_marks()
   delfunc Omni_test
 endfunc
 
+func Test_complete_append_selected_match_default()
+  " when typing a normal character during completion,
+  " completion is ended, see
+  " :h popupmenu-completion ("There are three states:")
+  func PrintMenuWords()
+    let info = complete_info(["selected", "matches"])
+    call map(info.matches, {_, v -> v.word})
+    return info
+  endfunc
+
+  new
+  call setline(1, ["fo", "foo", "foobar", "fobarbaz"])
+  exe "normal! Gof\<c-n>\<c-r>=PrintMenuWords()\<cr>"
+  call assert_equal('fo{''matches'': [''fo'', ''foo'', ''foobar'', ''fobarbaz''], ''selected'': 0}', getline(5))
+  %d
+  call setline(1, ["fo", "foo", "foobar", "fobarbaz"])
+  exe "normal! Gof\<c-n>o\<c-r>=PrintMenuWords()\<cr>"
+  call assert_equal('foo{''matches'': [], ''selected'': -1}', getline(5))
+  %d
+  set completeopt=menu,noselect
+  call setline(1, ["fo", "foo", "foobar", "fobarbaz"])
+  exe "normal! Gof\<c-n>\<c-n>o\<c-r>=PrintMenuWords()\<cr>"
+  call assert_equal('foo{''matches'': [], ''selected'': -1}', getline(5))
+  bw!
+
+  set completeopt&
+  delfunc PrintMenuWords
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab nofoldenable

src/version.c

@@ -704,6 +704,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1265,
 /**/
     1264,
 /**/