Before:
  Save g:ale_python_pycodestyle_executable
  Save g:ale_python_pycodestyle_options
  Save g:ale_python_pycodestyle_use_global

  runtime ale_linters/python/pycodestyle.vim

After:
  Restore

  call ale#linter#Reset()

Execute(The pycodestyle command callback should return default string):
  AssertEqual ale#Escape('pycodestyle') . '  -',
  \ ale_linters#python#pycodestyle#GetCommand(bufnr(''))

Execute(The pycodestyle command callback should allow options):
  let g:ale_python_pycodestyle_options = '--exclude=test*.py'

  AssertEqual ale#Escape('pycodestyle') . ' --exclude=test*.py -',
  \ ale_linters#python#pycodestyle#GetCommand(bufnr(''))

Execute(The pycodestyle executable should be configurable):
  let g:ale_python_pycodestyle_executable = '~/.local/bin/pycodestyle'

  AssertEqual ale#Escape('~/.local/bin/pycodestyle') . '  -',
  \ ale_linters#python#pycodestyle#GetCommand(bufnr(''))

Execute(Setting executable to 'pipenv' appends 'run pycodestyle'):
  let g:ale_python_pycodestyle_executable = 'path/to/pipenv'

  AssertEqual
  \ ale#Escape('path/to/pipenv') . ' run pycodestyle  -',
  \ ale_linters#python#pycodestyle#GetCommand(bufnr(''))