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

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

  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 . '/isort')) . ' -',
  \ },
  \ ale#fixers#isort#Fix(bufnr(''))

Execute(The isort callback should respect custom options):
  let g:ale_python_isort_options = '--multi-line=3 --trailing-comma'

  AssertEqual
  \ 0,
  \ ale#fixers#isort#Fix(bufnr(''))

  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 . '/isort'))
  \     . ' --multi-line=3 --trailing-comma -',
  \ },
  \ ale#fixers#isort#Fix(bufnr(''))

Execute(Pipenv is detected when python_isort_auto_pipenv is set):
  let g:ale_python_isort_auto_pipenv = 1

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

  AssertEqual
  \ {
  \   'cwd': '%s:h',
  \   'command': ale#Escape('pipenv') . ' run isort -'
  \ },
  \ ale#fixers#isort#Fix(bufnr(''))