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.
diff --git a/src/testdir/test_edit.vim b/src/testdir/test_edit.vim
index f857516..7278bcd 100644
--- a/src/testdir/test_edit.vim
+++ b/src/testdir/test_edit.vim
@@ -631,11 +631,11 @@
   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')
@@ -1357,7 +1357,6 @@
   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)
diff --git a/src/testdir/test_ins_complete.vim b/src/testdir/test_ins_complete.vim
index e57782f..652b1d9 100644
--- a/src/testdir/test_ins_complete.vim
+++ b/src/testdir/test_ins_complete.vim
@@ -116,3 +116,14 @@
   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
diff --git a/src/testdir/test_popup.vim b/src/testdir/test_popup.vim
index 6250c1b..d121aff 100644
--- a/src/testdir/test_popup.vim
+++ b/src/testdir/test_popup.vim
@@ -693,7 +693,7 @@
   norm! gt
   call assert_equal(0, &previewwindow)
   norm! gT
-  call assert_equal(12, tabpagenr('$'))
+  call assert_equal(10, tabpagenr('$'))
   tabonly
   pclose
   augroup MyBufAdd