Before:
  call ale#assert#SetUpLinterTest('desktop', 'desktop_file_validate')

After:
  call ale#assert#TearDownLinterTest()

Execute(The default command should be correct):
  AssertLinter 'desktop-file-validate',
  \ ale#Escape('desktop-file-validate') . ' %t'

Execute(Extra options should work):
  let b:ale_desktop_desktop_file_validate_options = '--warn-kde'

  AssertLinter 'desktop-file-validate',
  \ ale#Escape('desktop-file-validate') . ' --warn-kde %t'