Before:
  call ale#assert#SetUpFixerTest('python', 'black')

  silent cd ..
  silent cd command_callback
  let g:dir = getcwd()
  let b:bin_dir = has('win32') ? 'Scripts' : 'bin'

After:
  call ale#assert#TearDownFixerTest()

  unlet! g:dir
  unlet! b:bin_dir

Execute(The black callback should return the correct default values):
  silent execute 'file ' . fnameescape(g:dir . '/python_paths/with_virtualenv/subdir/foo/bar.py')
  AssertEqual
  \ {
  \   'cwd': '%s:h',
  \   'command': ale#Escape(ale#path#Simplify(g:dir . '/python_paths/with_virtualenv/env/' . b:bin_dir . '/black')) . ' -'},
  \ ale#fixers#black#Fix(bufnr(''))

Execute(The black callback should include options):
  let g:ale_python_black_options = '--some-option'
  let g:ale_python_black_change_directory = 0

  silent execute 'file ' . fnameescape(g:dir . '/python_paths/with_virtualenv/subdir/foo/bar.py')
  AssertEqual
  \ {'command': ale#Escape(ale#path#Simplify(g:dir . '/python_paths/with_virtualenv/env/' . b:bin_dir . '/black')) . ' --some-option -' },
  \ ale#fixers#black#Fix(bufnr(''))

Execute(The black callback should include --pyi for .pyi files):
  let g:ale_python_black_change_directory = 0

  silent execute 'file ' . fnameescape(g:dir . '/python_paths/with_virtualenv/subdir/foo/bar.pyi')

  AssertEqual
  \ {'command': ale#Escape(ale#path#Simplify(g:dir . '/python_paths/with_virtualenv/env/' . b:bin_dir . '/black')) . ' --pyi -' },
  \ ale#fixers#black#Fix(bufnr(''))

Execute(Pipenv is detected when python_black_auto_pipenv is set):
  let g:ale_python_black_auto_pipenv = 1
  let g:ale_python_black_change_directory = 0

  call ale#test#SetFilename('../python_fixtures/pipenv/whatever.py')

  AssertEqual
  \ {'command': ale#Escape('pipenv') . ' run black -'},
  \ ale#fixers#black#Fix(bufnr(''))