patch 8.0.0894: there is no test for runtime filetype detection commit https://github.com/vim/vim/commit/0a0217abfabcee8b0779df2e18a186a4b41e18ce Author: Bram Moolenaar <Bram@vim.org> Date: Wed Aug 9 22:06:48 2017 +0200 patch 8.0.0894: there is no test for runtime filetype detection Problem: There is no test for runtime filetype detection. Solution: Test a list of filetypes from patterns.

" Test for :cd

func Test_cd_large_path()
  " This used to crash with a heap write overflow.
  call assert_fails('cd ' . repeat('x', 5000), 'E472:')
endfunc

func Test_cd_up_and_down()
  let path = getcwd()
  cd ..
  exe 'cd ' . path
  call assert_equal(path, getcwd())
endfunc