commit https://github.com/vim/vim/commit/7b668e83d0635d082b7ec90d7d2aa30a9d7d8928 Author: Bram Moolenaar <Bram@vim.org> Date: Tue Aug 23 23:51:21 2016 +0200 patch 7.4.2244 Problem: Adding pattern to ":oldfiles" is not a generic solution. Solution: Add the ":filter /pat/ cmd" command modifier. Only works for some commands right now.

" 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