Before:
  call ale#assert#SetUpFixerTest('julia', 'fatou')

After:
  call ale#assert#TearDownFixerTest()

Execute(The default command should be correct):
  AssertFixer
  \ {
  \   'command': ale#Escape('fatou') . ' format',
  \ }

Execute(The executable and options should be configurable):
  let g:ale_julia_fatou_executable = 'foobar'
  let g:ale_julia_fatou_options = '--line-width 80'

  AssertFixer
  \ {
  \   'command': ale#Escape('foobar') . ' format --line-width 80',
  \ }