Before:
  call ale#assert#SetUpLinterTest('python', 'flake8')
  let b:bin_dir = has('win32') ? 'Scripts' : 'bin'

  WithChainResults ['3.0.0']

After:
  unlet! b:executable
  unlet! b:bin_dir
  call ale#assert#TearDownLinterTest()

Execute(The flake8 callbacks should return the correct default values):
  AssertLinter 'flake8', [
  \ ale#Escape('flake8') . ' --version',
  \ ale#path#BufferCdString(bufnr(''))
  \   . ale#Escape('flake8') . ' --format=default --stdin-display-name %s -',
  \]

  " The version check should be cached.
  WithChainResults []
  AssertLinter 'flake8', [
  \ '',
  \ ale#path#BufferCdString(bufnr(''))
  \   . ale#Escape('flake8') . ' --format=default --stdin-display-name %s -',
  \]

  " Try with older versions.
  call ale#semver#ResetVersionCache()
  WithChainResults ['2.9.9']
  AssertLinter 'flake8', [
  \ ale#Escape('flake8') . ' --version',
  \ ale#path#BufferCdString(bufnr(''))
  \   . ale#Escape('flake8') . ' --format=default -',
  \]

Execute(The option for disabling changing directories should work):
  let g:ale_python_flake8_change_directory = 0

  AssertLinter 'flake8', [
  \ ale#Escape('flake8') . ' --version',
  \ ale#Escape('flake8') . ' --format=default --stdin-display-name %s -',
  \]

Execute(The flake8 command callback should let you set options):
  let g:ale_python_flake8_options = '--some-option'

  WithChainResults ['3.0.4']
  AssertLinter 'flake8', [
  \ ale#Escape('flake8') . ' --version',
  \ ale#path#BufferCdString(bufnr(''))
  \   . ale#Escape('flake8') . ' --some-option'
  \   . ' --format=default --stdin-display-name %s -',
  \]

  call ale#semver#ResetVersionCache()
  WithChainResults ['2.9.9']
  AssertLinter 'flake8', [
  \ ale#Escape('flake8') . ' --version',
  \ ale#path#BufferCdString(bufnr(''))
  \   . ale#Escape('flake8') . ' --some-option --format=default -',
  \]

Execute(You should be able to set a custom executable and it should be escaped):
  let g:ale_python_flake8_executable = 'executable with spaces'

  AssertLinter 'executable with spaces', [
  \ ale#Escape('executable with spaces') . ' --version',
  \ ale#path#BufferCdString(bufnr(''))
  \   .  ale#Escape('executable with spaces')
  \   . ' --format=default'
  \   . ' --stdin-display-name %s -',
  \]

Execute(The flake8 callbacks should detect virtualenv directories):
  silent execute 'file ' . fnameescape(g:dir . '/python_paths/with_virtualenv/subdir/foo/bar.py')

  let b:executable = ale#path#Simplify(
  \ g:dir . '/python_paths/with_virtualenv/env/' . b:bin_dir . '/flake8'
  \)

  AssertLinter b:executable, [
  \ ale#Escape(b:executable) . ' --version',
  \ ale#path#BufferCdString(bufnr(''))
  \   .  ale#Escape(b:executable)
  \   . ' --format=default'
  \   . ' --stdin-display-name %s -',
  \]

Execute(The FindProjectRoot should detect the project root directory for namespace package via Manifest.in):
  silent execute 'file ' . fnameescape(g:dir . '/python_paths/namespace_package_manifest/namespace/foo/bar.py')

  AssertEqual
  \ ale#path#Simplify(g:dir . '/python_paths/namespace_package_manifest'),
  \ ale#python#FindProjectRoot(bufnr(''))

Execute(The FindProjectRoot should detect the project root directory for namespace package via setup.cf):
  silent execute 'file ' . fnameescape(g:dir . '/python_paths/namespace_package_setup/namespace/foo/bar.py')

  AssertEqual
  \ ale#path#Simplify(g:dir . '/python_paths/namespace_package_setup'),
  \ ale#python#FindProjectRoot(bufnr(''))

Execute(The FindProjectRoot should detect the project root directory for namespace package via pytest.ini):
  silent execute 'file ' . fnameescape(g:dir . '/python_paths/namespace_package_pytest/namespace/foo/bar.py')

  AssertEqual
  \ ale#path#Simplify(g:dir . '/python_paths/namespace_package_pytest'),
  \ ale#python#FindProjectRoot(bufnr(''))

Execute(The FindProjectRoot should detect the project root directory for namespace package via tox.ini):
  silent execute 'file ' . fnameescape(g:dir . '/python_paths/namespace_package_tox/namespace/foo/bar.py')

  AssertEqual
  \ ale#path#Simplify(g:dir . '/python_paths/namespace_package_tox'),
  \ ale#python#FindProjectRoot(bufnr(''))

Execute(The FindProjectRoot should detect the project root directory for non-namespace package):
  silent execute 'file ' . fnameescape(g:dir . '/python_paths/no_virtualenv/subdir/foo/bar.py')

  AssertEqual
  \ ale#path#Simplify(g:dir . '/python_paths/no_virtualenv/subdir'),
  \ ale#python#FindProjectRoot(bufnr(''))

" Some users currently run flake8 this way, so we should support it.
Execute(Using `python -m flake8` should be supported for running flake8):
  silent execute 'file ' . fnameescape(g:dir . '/python_paths/with_virtualenv/subdir/foo/bar.py')

  let g:ale_python_flake8_executable = 'python'
  let g:ale_python_flake8_options = '-m flake8 --some-option'

  WithChainResults ['2.9.9']
  AssertLinter 'python', [
  \ ale#Escape('python') . ' -m flake8 --version',
  \ ale#path#BufferCdString(bufnr(''))
  \   .  ale#Escape('python')
  \   . ' -m flake8 --some-option --format=default -'
  \]

  call ale#semver#ResetVersionCache()

  " Leading spaces shouldn't matter
  let g:ale_python_flake8_options = '  -m flake8 --some-option'

  WithChainResults ['2.9.9']
  AssertLinter 'python', [
  \ ale#Escape('python') . ' -m flake8 --version',
  \ ale#path#BufferCdString(bufnr(''))
  \   .  ale#Escape('python')
  \   . '   -m flake8 --some-option --format=default -'
  \]

Execute(Setting executable to 'pipenv' should append 'run flake8'):
  let g:ale_python_flake8_executable = 'path/to/pipenv'

  " FIXME: pipenv should check the vresion with flake8.
  WithChainResults []
  AssertLinter 'path/to/pipenv',
  \ ale#path#BufferCdString(bufnr(''))
  \   .  ale#Escape('path/to/pipenv') . ' run flake8 --format=default -'