Before:
  Save g:ale_python_yapf_executable

  " Use an invalid global executable, so we don't match it.
  let g:ale_python_yapf_executable = 'xxxinvalid'

  call ale#test#SetDirectory('/testplugin/test/fixers')
  silent cd ..
  silent cd command_callback
  let g:dir = getcwd()

After:
  Restore

  call ale#test#RestoreDirectory()

Execute(The yapf callback should return the correct default values):
  AssertEqual
  \ 0,
  \ ale#fixers#yapf#Fix(bufnr(''))

  call ale#test#SetFilename('python_paths/with_virtualenv/subdir/foo/bar.py')

  AssertEqual
  \ {'command': ale#Escape(g:dir . '/python_paths/with_virtualenv/env/bin/yapf')},
  \ ale#fixers#yapf#Fix(bufnr(''))
  \
Execute(The yapf should include the .style.yapf file if present):
  call ale#test#SetFilename('python_paths/with_virtualenv/dir_with_yapf_config/foo/bar.py')

  AssertEqual
  \ {
  \   'command':
  \     ale#Escape(g:dir . '/python_paths/with_virtualenv/env/bin/yapf')
  \     . ' --no-local-style'
  \     . ' --style ' . ale#Escape(g:dir . '/python_paths/with_virtualenv/dir_with_yapf_config/.style.yapf'),
  \ },
  \ ale#fixers#yapf#Fix(bufnr(''))