Before:
  Save g:ale_qml_qmlfmt_executable

After:
  Restore

Execute(The qmlfmt fixer should use the options you set):
  let g:ale_qml_qmlfmt_executable = 'foo-exe'

  AssertEqual
  \ {'command': ale#Escape('foo-exe')},
  \ ale#fixers#qmlfmt#Fix(bufnr(''))