Before:
  Save g:ale_http_kulala_fmt_executable

  " Use an invalid global executable, so we don't match it.
  let g:ale_http_kulala_fmt_executable = 'xxxinvalid'

  call ale#test#SetDirectory('/testplugin/test/fixers')

After:
  Restore

  call ale#test#RestoreDirectory()

Execute(The kualala_fmt callback should return the correct default values):
  call ale#test#SetFilename('../test-files/http/dummy.http')

  AssertEqual
  \ {
  \   'command': ale#Escape(g:ale_http_kulala_fmt_executable)
  \     . ' format %t > /dev/null',
  \   'read_temporary_file': 1,
  \ },
  \ ale#fixers#kulala_fmt#Fix(bufnr(''))