commit https://github.com/vim/vim/commit/c9fb77c69244870a97384152f20845665c19fe39 Author: Bram Moolenaar <Bram@vim.org> Date: Tue Aug 9 21:51:40 2016 +0200 patch 7.4.2188 Problem: Completion does not work properly with some plugins. Solution: Revert the part related to typing CTRL-E. (closes https://github.com/vim/vim/issues/972)

" Test 'autochdir' behavior

if !exists("+autochdir")
  finish
endif

func Test_set_filename()
  call test_autochdir()
  set acd
  new
  w samples/Xtest
  call assert_equal("Xtest", expand('%'))
  call assert_equal("samples", substitute(getcwd(), '.*/\(\k*\)', '\1', ''))
  bwipe!
  set noacd
  call delete('samples/Xtest')
endfunc