vim-patch:8.0.1482: using feedkeys() does not work to test completion

Problem:    Using feedkeys() does not work to test Insert mode completion.
            (Lifepillar)
Solution:   Do not check for typed keys when executing :normal or feedkeys().
            Fix thesaurus completion not working when 'complete' is empty.
02ae9b4a93

src/nvim/edit.c

@@ -514,7 +514,7 @@ static int insert_check(VimState *state)
   // If typed something may trigger CursorHoldI again.
   if (s->c != K_EVENT
       // but not in CTRL-X mode, a script can't restore the state
-      && ctrl_x_mode == 0) {
+      && ctrl_x_mode == CTRL_X_NORMAL) {
     did_cursorhold = false;
   }
 
@@ -523,7 +523,10 @@ static int insert_check(VimState *state)
     s->inserted_space = false;
   }
 
-  if (can_cindent && cindent_on() && ctrl_x_mode == 0 && !compl_started) {
+  if (can_cindent
+      && cindent_on()
+      && ctrl_x_mode == CTRL_X_NORMAL
+      && !compl_started) {
     insert_do_cindent(s);
   }
 
@@ -1209,7 +1212,8 @@ check_pum:
     // if 'complete' is empty then plain ^P is no longer special,
     // but it is under other ^X modes
     if (*curbuf->b_p_cpt == NUL
-        && ctrl_x_mode != 0
+        && (ctrl_x_mode == CTRL_X_NORMAL
+            || ctrl_x_mode == CTRL_X_WHOLE_LINE)
         && !(compl_cont_status & CONT_LOCAL)) {
       goto normalchar;
     }
@@ -4535,12 +4539,12 @@ void ins_compl_check_keys(int frequency, int in_compl_func)
 {
   static int count = 0;
 
-  int c;
+  // Don't check when reading keys from a script, :normal or feedkeys().
-
+  // That would break the test scripts.  But do check for keys when called
-  /* Don't check when reading keys from a script.  That would break the test
+  // from complete_check().
-   * scripts */
+  if (!in_compl_func && (using_script() || ex_normal_busy)) {
-  if (using_script())
     return;
+  }
 
   /* Only do this at regular intervals */
   if (++count < frequency)
@@ -4549,7 +4553,7 @@ void ins_compl_check_keys(int frequency, int in_compl_func)
 
   /* Check for a typed key.  Do use mappings, otherwise vim_is_ctrl_x_key()
    * can't do its work correctly. */
-  c = vpeekc_any();
+  int c = vpeekc_any();
   if (c != NUL) {
     if (vim_is_ctrl_x_key(c) && c != Ctrl_X && c != Ctrl_R) {
       c = safe_vgetc();         /* Eat the character */

src/nvim/testdir/test_edit.vim

@@ -643,11 +643,11 @@ func! Test_edit_CTRL_L()
   call feedkeys("cct\<c-x>\<c-l>\<c-n>\<esc>", 'tnix')
   call assert_equal(['one', 'two', 'three', 't', '', '', ''], getline(1, '$'))
   call feedkeys("cct\<c-x>\<c-l>\<c-n>\<c-n>\<esc>", 'tnix')
-  call assert_equal(['one', 'two', 'three', 't', '', '', ''], getline(1, '$'))
-  call feedkeys("cct\<c-x>\<c-l>\<c-n>\<c-n>\<c-n>\<esc>", 'tnix')
   call assert_equal(['one', 'two', 'three', 'two', '', '', ''], getline(1, '$'))
-  call feedkeys("cct\<c-x>\<c-l>\<c-n>\<c-n>\<c-n>\<c-n>\<esc>", 'tnix')
+  call feedkeys("cct\<c-x>\<c-l>\<c-n>\<c-n>\<c-n>\<esc>", 'tnix')
   call assert_equal(['one', 'two', 'three', 'three', '', '', ''], getline(1, '$'))
+  call feedkeys("cct\<c-x>\<c-l>\<c-n>\<c-n>\<c-n>\<c-n>\<esc>", 'tnix')
+  call assert_equal(['one', 'two', 'three', 't', '', '', ''], getline(1, '$'))
   call feedkeys("cct\<c-x>\<c-l>\<c-p>\<esc>", 'tnix')
   call assert_equal(['one', 'two', 'three', 'two', '', '', ''], getline(1, '$'))
   call feedkeys("cct\<c-x>\<c-l>\<c-p>\<c-p>\<esc>", 'tnix')
@@ -1408,7 +1408,6 @@ func Test_edit_complete_very_long_name()
   let save_columns = &columns
   " Need at least about 1100 columns to reproduce the problem.
   set columns=2000
-  call assert_equal(2000, &columns)
   set noswapfile
 
   let longfilename = longdirname . '/' . repeat('a', 255)

src/nvim/testdir/test_ins_complete.vim

@@ -249,3 +249,14 @@ func Test_omni_dash()
   delfunc Omni
   set omnifunc=
 endfunc
+
+" Check that when using feedkeys() typeahead does not interrupt searching for
+" completions.
+func Test_compl_feedkeys()
+  new
+  set completeopt=menuone,noselect
+  call feedkeys("ajump ju\<C-X>\<C-N>\<C-P>\<ESC>", "tx")
+  call assert_equal("jump jump", getline(1))
+  bwipe!
+  set completeopt&
+endfunc

src/nvim/testdir/test_popup.vim

@@ -641,7 +641,7 @@ func Test_popup_and_preview_autocommand()
   norm! gt
   call assert_equal(0, &previewwindow)
   norm! gT
-  call assert_equal(12, tabpagenr('$'))
+  call assert_equal(10, tabpagenr('$'))
   tabonly
   pclose
   augroup MyBufAdd