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

After:
  let g:ale_has_override = {}
  call ale#test#RestoreDirectory()

Execute(The path to eslint.js should be run on Unix):
  call ale#test#SetFilename('../eslint-test-files/react-app/subdir/testfile.js')

  AssertEqual
  \ {
  \   'read_temporary_file': 1,
  \   'command':
  \     ale#Escape(simplify(g:dir . '/../eslint-test-files/react-app/node_modules/eslint/bin/eslint.js'))
  \     . ' --config ' . ale#Escape(simplify(g:dir . '/../eslint-test-files/react-app/.eslintrc.js'))
  \     . ' --fix %t',
  \ },
  \ ale#fixers#eslint#Fix(bufnr(''))

Execute(The lower priority configuration file in a nested directory should be preferred):
  call ale#test#SetFilename('../eslint-test-files/react-app/subdir-with-config/testfile.js')

  AssertEqual
  \ {
  \   'read_temporary_file': 1,
  \   'command':
  \     ale#Escape(simplify(g:dir . '/../eslint-test-files/react-app/node_modules/eslint/bin/eslint.js'))
  \     . ' --config ' . ale#Escape(simplify(g:dir . '/../eslint-test-files/react-app/subdir-with-config/.eslintrc'))
  \     . ' --fix %t',
  \ },
  \ ale#fixers#eslint#Fix(bufnr(''))

Execute(package.json should be used as a last resort):
  call ale#test#SetFilename('../eslint-test-files/react-app/subdir-with-package-json/testfile.js')

  AssertEqual
  \ {
  \   'read_temporary_file': 1,
  \   'command':
  \     ale#Escape(simplify(g:dir . '/../eslint-test-files/react-app/node_modules/eslint/bin/eslint.js'))
  \     . ' --config ' . ale#Escape(simplify(g:dir . '/../eslint-test-files/react-app/.eslintrc.js'))
  \     . ' --fix %t',
  \ },
  \ ale#fixers#eslint#Fix(bufnr(''))

  call ale#test#SetFilename('../eslint-test-files/package.json')

  AssertEqual
  \ {
  \   'read_temporary_file': 1,
  \   'command':
  \     ale#Escape(simplify(g:dir . '/../eslint-test-files/node_modules/.bin/eslint'))
  \     . ' --config ' . ale#Escape(simplify(g:dir . '/../eslint-test-files/package.json'))
  \     . ' --fix %t',
  \ },
  \ ale#fixers#eslint#Fix(bufnr(''))