Before:
  Save g:ale_html_tidy_executable

  let g:ale_html_tidy_executable = '../test-files/tidy/tidy'

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

After:
  Restore

  call ale#test#RestoreDirectory()

Execute(The tidy callback should return 0 if tidy not found):
  let g:ale_html_tidy_executable = 'xxxinvalidpath'
  AssertEqual
  \ 0,
  \ ale#fixers#tidy#Fix(bufnr(''))

Execute(The tidy callback should return the correct default command):
  AssertEqual
  \ {
  \   'command': ale#Escape('../test-files/tidy/tidy')
  \     . ' -q --tidy-mark no --show-errors 0 --show-warnings 0'
  \ },
  \ ale#fixers#tidy#Fix(bufnr(''))