Before:
  silent! cd /testplugin/test/util
  let g:dir = getcwd()

After:
  silent execute 'cd ' . fnameescape(g:dir)
  unlet! g:dir

Execute(CdString should output the correct command string):
  " We will check that escaping is done correctly for each platform.
  AssertEqual
  \ has('unix') ? 'cd ''/foo bar/baz'' && ' : 'cd /d "/foo bar/baz" && ',
  \ ale#command#CdString('/foo bar/baz')

Execute(CdString handle substitution and formatting):
  call ale#test#SetFilename('foo.txt')

  AssertEqual
  \ has('unix') ? 'cd %s:h && ' : 'cd /d %s:h && ',
  \ ale#command#CdString('%s:h')