patch 7.4.1759
Problem: When using feedkeys() in a timer the inserted characters are not
used right away.
Solution: Break the wait loop when characters have been added to typebuf.
use this for testing CursorHoldI.
diff --git a/src/testdir/test_autocmd.vim b/src/testdir/test_autocmd.vim
index 12c9848..d3e0981 100644
--- a/src/testdir/test_autocmd.vim
+++ b/src/testdir/test_autocmd.vim
@@ -6,3 +6,30 @@
" This script will never reach the main loop, can't check if v:vim_did_enter
" becomes one.
endfunc
+
+if !has('timers')
+ finish
+endif
+
+func ExitInsertMode(id)
+ call feedkeys("\<Esc>")
+endfunc
+
+func Test_cursorhold_insert()
+ let g:triggered = 0
+ au CursorHoldI * let g:triggered += 1
+ set updatetime=20
+ call timer_start(100, 'ExitInsertMode')
+ call feedkeys('a', 'x!')
+ call assert_equal(1, g:triggered)
+endfunc
+
+func Test_cursorhold_insert_ctrl_x()
+ let g:triggered = 0
+ au CursorHoldI * let g:triggered += 1
+ set updatetime=20
+ call timer_start(100, 'ExitInsertMode')
+ " CursorHoldI does not trigger after CTRL-X
+ call feedkeys("a\<C-X>", 'x!')
+ call assert_equal(0, g:triggered)
+endfunc